mirror of
https://github.com/nlohmann/json.git
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Merge branch 'ci/tiers' into ci/windows-macos-sets
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
This commit is contained in:
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@@ -28,7 +28,7 @@ jobs:
|
||||
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
|
||||
@@ -22,7 +22,7 @@ jobs:
|
||||
runs-on: ubuntu-latest
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
@@ -46,7 +46,7 @@ jobs:
|
||||
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
|
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@@ -20,7 +20,7 @@ jobs:
|
||||
timeout-minutes: 30
|
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steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
|
||||
@@ -13,7 +13,7 @@ jobs:
|
||||
runs-on: ubuntu-22.04
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
|
||||
@@ -27,7 +27,7 @@ jobs:
|
||||
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
@@ -38,14 +38,14 @@ jobs:
|
||||
|
||||
# Initializes the CodeQL tools for scanning.
|
||||
- name: Initialize CodeQL
|
||||
uses: github/codeql-action/init@6f2ac81f5cd81fe351a197ba0b00d91d03cd2aee # v4.39.0
|
||||
uses: github/codeql-action/init@9b3254085494b55a0f7c4c2b3d2d52cc712ce370 # v4.39.1
|
||||
with:
|
||||
languages: c-cpp
|
||||
|
||||
# Autobuild attempts to build any compiled languages (C/C++, C#, or Java).
|
||||
# If this step fails, then you should remove it and run the build manually (see below)
|
||||
- name: Autobuild
|
||||
uses: github/codeql-action/autobuild@6f2ac81f5cd81fe351a197ba0b00d91d03cd2aee # v4.39.0
|
||||
uses: github/codeql-action/autobuild@9b3254085494b55a0f7c4c2b3d2d52cc712ce370 # v4.39.1
|
||||
|
||||
- name: Perform CodeQL Analysis
|
||||
uses: github/codeql-action/analyze@6f2ac81f5cd81fe351a197ba0b00d91d03cd2aee # v4.39.0
|
||||
uses: github/codeql-action/analyze@9b3254085494b55a0f7c4c2b3d2d52cc712ce370 # v4.39.1
|
||||
@@ -20,7 +20,7 @@ jobs:
|
||||
pull-requests: write
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
|
||||
@@ -21,7 +21,7 @@ jobs:
|
||||
runs-on: ubuntu-latest
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
|
||||
@@ -31,7 +31,7 @@ jobs:
|
||||
security-events: write
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
@@ -48,6 +48,6 @@ jobs:
|
||||
output: 'flawfinder_results.sarif'
|
||||
|
||||
- name: Upload analysis results to GitHub Security tab
|
||||
uses: github/codeql-action/upload-sarif@6f2ac81f5cd81fe351a197ba0b00d91d03cd2aee # v4.39.0
|
||||
uses: github/codeql-action/upload-sarif@9b3254085494b55a0f7c4c2b3d2d52cc712ce370 # v4.39.1
|
||||
with:
|
||||
sarif_file: ${{github.workspace}}/flawfinder_results.sarif
|
||||
@@ -54,7 +54,7 @@ jobs:
|
||||
timeout-minutes: 60
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
|
||||
@@ -23,7 +23,7 @@ jobs:
|
||||
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
|
||||
@@ -37,7 +37,7 @@ jobs:
|
||||
runs-on: ubuntu-latest
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
|
||||
@@ -24,7 +24,7 @@ jobs:
|
||||
runs-on: ubuntu-26.04
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
@@ -43,7 +43,7 @@ jobs:
|
||||
runs-on: ubuntu-26.04
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
@@ -64,7 +64,7 @@ jobs:
|
||||
target: [ci_test_examples, ci_test_build_documentation, ci_test_documentation_mermaid]
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
|
||||
@@ -40,7 +40,7 @@ jobs:
|
||||
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
@@ -80,6 +80,6 @@ jobs:
|
||||
|
||||
# Upload the results to GitHub's code scanning dashboard.
|
||||
- name: "Upload to code-scanning"
|
||||
uses: github/codeql-action/upload-sarif@6f2ac81f5cd81fe351a197ba0b00d91d03cd2aee # v4.39.0
|
||||
uses: github/codeql-action/upload-sarif@9b3254085494b55a0f7c4c2b3d2d52cc712ce370 # v4.39.1
|
||||
with:
|
||||
sarif_file: results.sarif
|
||||
@@ -36,7 +36,7 @@ jobs:
|
||||
runs-on: ubuntu-26.04
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
@@ -65,7 +65,7 @@ jobs:
|
||||
|
||||
# Upload SARIF file generated in previous step
|
||||
- name: Upload SARIF file
|
||||
uses: github/codeql-action/upload-sarif@6f2ac81f5cd81fe351a197ba0b00d91d03cd2aee # v4.39.0
|
||||
uses: github/codeql-action/upload-sarif@9b3254085494b55a0f7c4c2b3d2d52cc712ce370 # v4.39.1
|
||||
with:
|
||||
sarif_file: semgrep.sarif
|
||||
if: always()
|
||||
@@ -16,7 +16,7 @@ jobs:
|
||||
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
|
||||
@@ -130,7 +130,7 @@ jobs:
|
||||
target: [ci_cpplint]
|
||||
steps: &static_analysis_ubuntu_steps
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
@@ -306,7 +306,7 @@ jobs:
|
||||
runs-on: ubuntu-26.04
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
@@ -461,7 +461,7 @@ jobs:
|
||||
runs-on: ubuntu-26.04
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
@@ -499,7 +499,7 @@ jobs:
|
||||
runs-on: ubuntu-26.04
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
@@ -631,7 +631,7 @@ jobs:
|
||||
issues: write
|
||||
steps:
|
||||
- name: Harden Runner
|
||||
uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
|
||||
uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
|
||||
with:
|
||||
egress-policy: audit
|
||||
|
||||
|
||||
@@ -67,7 +67,7 @@ jobs:
|
||||
with:
|
||||
persist-credentials: false
|
||||
- name: Set up MinGW
|
||||
uses: egor-tensin/setup-mingw@41b837e47d7f85214629d255b9c4bc3fcbe9fd63 # v3.0
|
||||
uses: egor-tensin/setup-mingw@d54f5ef0ce585bd3fbb1f8a71b5b254f59dbf931 # v3.0
|
||||
with:
|
||||
platform: ${{ matrix.architecture }}
|
||||
version: 12.2.0 # https://github.com/egor-tensin/setup-mingw/issues/14
|
||||
@@ -210,7 +210,7 @@ jobs:
|
||||
- name: Install Clang
|
||||
run: curl -fsSL -o LLVM${{ matrix.version }}.exe https://github.com/llvm/llvm-project/releases/download/llvmorg-${{ matrix.version }}/LLVM-${{ matrix.version }}-win64.exe ; 7z x LLVM${{ matrix.version }}.exe -y -o"C:/Program Files/LLVM"
|
||||
- name: Set up MinGW
|
||||
uses: egor-tensin/setup-mingw@41b837e47d7f85214629d255b9c4bc3fcbe9fd63 # v3.0
|
||||
uses: egor-tensin/setup-mingw@d54f5ef0ce585bd3fbb1f8a71b5b254f59dbf931 # v3.0
|
||||
with:
|
||||
platform: x64
|
||||
version: 12.2.0 # https://github.com/egor-tensin/setup-mingw/issues/14
|
||||
|
||||
@@ -1408,9 +1408,9 @@ THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR I
|
||||
- The class contains a port of the shortest double-to-decimal conversion of [Żmij](https://github.com/vitaut/zmij) by Victor Zverovich, including the conversion of the digits to text by Xiang JunBo and the SIMD instruction sequence of Dougall Johnson, which is licensed under the [MIT License](https://opensource.org/licenses/MIT) (see above). Copyright © 2025 [Victor Zverovich](https://github.com/vitaut)
|
||||
- The class contains a copy of [Hedley](https://nemequ.github.io/hedley/) from Evan Nemerson which is licensed as [CC0-1.0](https://creativecommons.org/publicdomain/zero/1.0/).
|
||||
- The class contains parts of [Google Abseil](https://github.com/abseil/abseil-cpp) which is licensed under the [Apache 2.0 License](https://opensource.org/licenses/Apache-2.0).
|
||||
- The class contains an adapted version of the Eisel-Lemire algorithm, its table of powers of five, and its digit comparison for long numbers from [fast_float](https://github.com/fastfloat/fast_float) by Daniel Lemire and contributors, which is available under the [MIT License](https://opensource.org/licenses/MIT) (used here), the Apache 2.0 License, and the Boost Software License. Copyright © 2021 The fast_float authors
|
||||
- The class contains an adapted version of the Eisel-Lemire algorithm, its table of powers of five, its digit comparison for long numbers, and its parsing of eight digits at a time from [fast_float](https://github.com/fastfloat/fast_float) by Daniel Lemire and contributors, which is available under the [MIT License](https://opensource.org/licenses/MIT) (used here), the Apache 2.0 License, and the Boost Software License. Copyright © 2021 The fast_float authors
|
||||
- The view's parser (`<nlohmann/json_view.hpp>`) contains techniques and code adapted from [yyjson](https://github.com/ibireme/yyjson) by YaoYuan, which is licensed under the [MIT License](https://opensource.org/licenses/MIT) (see above): table-driven decoding of `\u` escapes and fixed-offset unrolled checks.
|
||||
- The view's parser (`<nlohmann/json_view.hpp>`) validates non-ASCII strings with the vector UTF-8 check of [simdjson](https://github.com/simdjson/simdjson) by Daniel Lemire, Geoff Langdale, John Keiser, and contributors (its "lookup4" algorithm and tables, after J. Keiser and D. Lemire, "Validating UTF-8 In Less Than One Instruction Per Byte", 2021), which is available under the [MIT License](https://opensource.org/licenses/MIT) (used here) and the Apache 2.0 License. Copyright © 2018-2025 The simdjson authors
|
||||
- The class's lexer and the view's parser (`<nlohmann/json_view.hpp>`) validate non-ASCII strings with the vector UTF-8 check of [simdjson](https://github.com/simdjson/simdjson) by Daniel Lemire, Geoff Langdale, John Keiser, and contributors (its "lookup4" algorithm and tables, after J. Keiser and D. Lemire, "Validating UTF-8 In Less Than One Instruction Per Byte", 2021), which is available under the [MIT License](https://opensource.org/licenses/MIT) (used here) and the Apache 2.0 License. Copyright © 2018-2025 The simdjson authors
|
||||
|
||||
<img align="right" src="https://git.fsfe.org/reuse/reuse-ci/raw/branch/master/reuse-horizontal.png" alt="REUSE Software">
|
||||
|
||||
|
||||
@@ -63,6 +63,15 @@ called:
|
||||
Whether the JSON value which called the function during parsing should be kept (`#!cpp true`) or not (`#!cpp false`). In
|
||||
the latter case, it is skipped completely, or replaced by `null` if it is the top-level value.
|
||||
|
||||
## Notes
|
||||
|
||||
For a `parse_event_t::key` event, `parsed` holds the decoded object name, with the same guarantees as the `val`
|
||||
parameter of [`json_sax::key`](../json_sax/key.md#notes): all escape sequences are decoded and `\uXXXX` escapes are
|
||||
stored as UTF-8, so different spellings of the same name yield identical strings; the name is validated completely
|
||||
before the callback is called, so a name with an invalid escape sequence or ill-formed UTF-8 causes a parse error and
|
||||
no `key` event; no Unicode normalization or case conversion is applied; and a name that occurs several times in the
|
||||
same object yields one `key` event per occurrence.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example "Example: skip an object key while parsing"
|
||||
|
||||
@@ -19,6 +19,23 @@ Whether parsing should proceed.
|
||||
|
||||
It is safe to move the passed object key value.
|
||||
|
||||
When parsing JSON text, `val` is the decoded object name, not its spelling in the input:
|
||||
|
||||
- All escape sequences (`\"`, `\\`, `\/`, `\b`, `\f`, `\n`, `\r`, `\t`, `\uXXXX`, and surrogate pairs) are
|
||||
decoded, and `\uXXXX` escapes are stored as UTF-8. Different spellings of the same name, such as `#!json "/"`
|
||||
and `#!json "\/"`, or `#!json "\u00e9"` and `#!json "\u00E9"`, yield identical strings. An escaped `\u0000` yields
|
||||
an embedded NUL byte.
|
||||
- The name is scanned and validated completely before `key` is called. If it contains an invalid escape sequence, an
|
||||
unpaired surrogate, a control character, or ill-formed UTF-8, the parse fails with a
|
||||
[`parse_error`](../../home/exceptions.md#parse-errors), and `key` is not called for it.
|
||||
- No Unicode normalization or case conversion is applied: names that differ in any byte are different strings.
|
||||
- `key` is called before the following `:` is read, so a parse error may still follow for the same member.
|
||||
- A name that occurs several times in the same object is passed once per occurrence.
|
||||
|
||||
For the binary formats, object keys contain no escape sequences. For CBOR, MessagePack, UBJSON, and BSON, `val` holds
|
||||
the bytes stored in the input, and [`sax_parse`](../basic_json/sax_parse.md) passes them unchanged, without checking them
|
||||
for valid UTF-8. BON8 encodes characters itself, so an ill-formed name is a parse error and `key` is not called for it.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example
|
||||
@@ -45,3 +62,7 @@ It is safe to move the passed object key value.
|
||||
## Version history
|
||||
|
||||
- Added in version 3.2.0.
|
||||
- The behavior described in the notes above (decoded names, validation before `key` is called, no normalization, `key`
|
||||
before the `:` check, one call per duplicate, bytes of binary formats passed unchanged) is the same in all versions
|
||||
from 3.2.0 on, and for the `key` event of a [parser callback](../basic_json/parser_callback_t.md) from 3.0.0 on. BSON
|
||||
is only supported from version 3.4.0, and BON8 only from version 3.13.0.
|
||||
@@ -64,6 +64,9 @@ bool parse_error(std::size_t position, const std::string& last_token, const json
|
||||
|
||||
The return value of each function determines whether parsing should proceed.
|
||||
|
||||
Object keys are passed to `key` decoded and validated: escape sequences are already resolved, so different spellings of
|
||||
the same name yield the same string. See [`key`](../../api/json_sax/key.md#notes) for the exact guarantees.
|
||||
|
||||
## Stepping through the events
|
||||
|
||||
The events for a small input, step by step, and what two different handlers do with them. Press *Play* or step with *Next*:
|
||||
|
||||
@@ -22,8 +22,8 @@ The class contains a port of the shortest double-to-decimal conversion of [Żmij
|
||||
|
||||
The class contains a copy of [Hedley](https://nemequ.github.io/hedley/) from Evan Nemerson which is licensed as [CC0-1.0](https://creativecommons.org/publicdomain/zero/1.0/).
|
||||
|
||||
The class contains an adapted version of the Eisel-Lemire algorithm, its table of powers of five, and its digit comparison for long numbers from [fast_float](https://github.com/fastfloat/fast_float) by Daniel Lemire and contributors, which is available under the [MIT License](https://opensource.org/licenses/MIT) (used here), the Apache 2.0 License, and the Boost Software License. Copyright © 2021 The fast_float authors
|
||||
The class contains an adapted version of the Eisel-Lemire algorithm, its table of powers of five, its digit comparison for long numbers, and its parsing of eight digits at a time from [fast_float](https://github.com/fastfloat/fast_float) by Daniel Lemire and contributors, which is available under the [MIT License](https://opensource.org/licenses/MIT) (used here), the Apache 2.0 License, and the Boost Software License. Copyright © 2021 The fast_float authors
|
||||
|
||||
The view's parser (`<nlohmann/json_view.hpp>`) contains techniques and code adapted from [yyjson](https://github.com/ibireme/yyjson) by YaoYuan, which is licensed under the [MIT License](https://opensource.org/licenses/MIT) (see above): table-driven decoding of `\u` escapes and fixed-offset unrolled checks.
|
||||
|
||||
The view's parser (`<nlohmann/json_view.hpp>`) validates non-ASCII strings with the vector UTF-8 check of [simdjson](https://github.com/simdjson/simdjson) by Daniel Lemire, Geoff Langdale, John Keiser, and contributors (its "lookup4" algorithm and tables, after J. Keiser and D. Lemire, "Validating UTF-8 In Less Than One Instruction Per Byte", 2021), which is available under the [MIT License](https://opensource.org/licenses/MIT) (used here) and the Apache 2.0 License. Copyright © 2018-2025 The simdjson authors
|
||||
The class's lexer and the view's parser (`<nlohmann/json_view.hpp>`) validate non-ASCII strings with the vector UTF-8 check of [simdjson](https://github.com/simdjson/simdjson) by Daniel Lemire, Geoff Langdale, John Keiser, and contributors (its "lookup4" algorithm and tables, after J. Keiser and D. Lemire, "Validating UTF-8 In Less Than One Instruction Per Byte", 2021), which is available under the [MIT License](https://opensource.org/licenses/MIT) (used here) and the Apache 2.0 License. Copyright © 2018-2025 The simdjson authors
|
||||
@@ -19,6 +19,11 @@
|
||||
#include <type_traits> // conditional
|
||||
|
||||
|
||||
// The shortest-digit conversion of doubles (see zmij.hpp) and the writing of
|
||||
// its digits, including the conversion of the digits to text by Xiang JunBo
|
||||
// and the SIMD instruction sequence by Dougall Johnson, are ported from Zmij
|
||||
// by Victor Zverovich (https://github.com/vitaut/zmij, MIT license).
|
||||
//
|
||||
// SSE2 (every x86-64 CPU) and NEON (every 64-bit Arm CPU) convert the 16
|
||||
// digits of a double at once (unless JSON_NO_SIMD selects the portable code)
|
||||
#if !defined(JSON_NO_SIMD) && (defined(__x86_64__) || (defined(_M_X64) && !defined(_M_ARM64EC)))
|
||||
|
||||
@@ -44,6 +44,13 @@
|
||||
// use std::from_chars or std::strtold. They are free functions so the lexer
|
||||
// stays focused on scanning (see lexer::convert_number()) and so that other
|
||||
// parsers of JSON text can convert tokens exactly like it does.
|
||||
//
|
||||
// The Eisel-Lemire conversion (eisel_lemire()), the digit comparison for the
|
||||
// cases it cannot decide, and the eight-digits-at-a-time helpers
|
||||
// (is_eight_digits(), parse_eight_digits()) are adapted from fast_float
|
||||
// (https://github.com/fastfloat/fast_float, Daniel Lemire and contributors,
|
||||
// available under the MIT, Apache 2.0, and Boost Software licenses; used here
|
||||
// under the MIT license). The table of powers of five is in pow5_table.hpp.
|
||||
|
||||
NLOHMANN_JSON_NAMESPACE_BEGIN
|
||||
namespace detail
|
||||
|
||||
@@ -30,6 +30,13 @@
|
||||
// NLOHMANN_JSON_NO_TARGET_ATTRIBUTE (for compilers that ignore the target
|
||||
// attribute and then reject the SSSE3 intrinsics) keeps the check portable
|
||||
// without disabling the SSE2 code.
|
||||
//
|
||||
// The vector UTF-8 check (utf8_lookup4) is adapted from simdjson
|
||||
// (https://github.com/simdjson/simdjson, Daniel Lemire, Geoff Langdale, John
|
||||
// Keiser, and contributors, available under the Apache 2.0 and MIT licenses;
|
||||
// used here under the MIT license): the "lookup4" algorithm and tables of
|
||||
// J. Keiser and D. Lemire, "Validating UTF-8 In Less Than One Instruction Per
|
||||
// Byte" (2021).
|
||||
#if !defined(JSON_NO_SIMD) && defined(__aarch64__) && (defined(__GNUC__) || defined(__clang__)) && defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
|
||||
#include <arm_neon.h>
|
||||
#define JSON_SCAN_NEON 1
|
||||
|
||||
File diff suppressed because it is too large.
Load diff
@@ -26,6 +26,7 @@
|
||||
#include <nlohmann/detail/view/lookup.hpp>
|
||||
#include <nlohmann/detail/view/macro_scope.hpp>
|
||||
#include <nlohmann/detail/view/node.hpp>
|
||||
#include <nlohmann/detail/view/scan.hpp>
|
||||
#include <nlohmann/detail/view/view_mode.hpp>
|
||||
|
||||
NLOHMANN_JSON_NAMESPACE_BEGIN
|
||||
@@ -46,10 +47,9 @@ struct first_true<false, Conditions...> : std::integral_constant < int, 1 + firs
|
||||
/// (type_error.316 with the same message), so that an editable document
|
||||
/// only holds valid UTF-8: the error is at the first byte that no
|
||||
/// well-formed sequence can continue with (Unicode, Table 3-7).
|
||||
inline void check_utf8(const char* s, std::size_t n)
|
||||
NLOHMANN_VIEW_ALWAYS_INLINE void check_utf8_bytewise(const unsigned char* p, std::size_t n, std::size_t i)
|
||||
{
|
||||
const auto* const p = reinterpret_cast<const unsigned char*>(s); // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast)
|
||||
for (std::size_t i = 0; i < n;)
|
||||
while (i < n)
|
||||
{
|
||||
const unsigned char c = p[i];
|
||||
if (c < 0x80)
|
||||
@@ -79,6 +79,43 @@ inline void check_utf8(const char* s, std::size_t n)
|
||||
}
|
||||
}
|
||||
|
||||
/// The long-string path of check_utf8(): skips well-formed runs with the
|
||||
/// parser's string scan (which stops at a quote, a backslash, or a control
|
||||
/// character, all legal here, and at ill-formed UTF-8); the byte-wise check
|
||||
/// runs only from where the scan found ill-formed UTF-8, to report it.
|
||||
NLOHMANN_VIEW_NOINLINE inline void check_utf8_scan(const unsigned char* p, std::size_t n)
|
||||
{
|
||||
const unsigned char* const e = p + n;
|
||||
const unsigned char* q = p;
|
||||
for (;;)
|
||||
{
|
||||
q = scan_string_run<true>(q, e);
|
||||
if (q == e)
|
||||
{
|
||||
return;
|
||||
}
|
||||
if (*q >= 0x80)
|
||||
{
|
||||
check_utf8_bytewise(p, n, static_cast<std::size_t>(q - p));
|
||||
return; // not reached: the scan stopped at ill-formed UTF-8
|
||||
}
|
||||
++q; // a quote, backslash, or control character
|
||||
}
|
||||
}
|
||||
|
||||
inline void check_utf8(const char* s, std::size_t n)
|
||||
{
|
||||
const auto* const p = reinterpret_cast<const unsigned char*>(s); // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast)
|
||||
if (NLOHMANN_VIEW_UNLIKELY(n >= 32))
|
||||
{
|
||||
check_utf8_scan(p, n);
|
||||
return;
|
||||
}
|
||||
// short strings: the vector scan costs more than it saves; (the loop is
|
||||
// inlined with a constant start, so this path is the plain byte-wise check)
|
||||
check_utf8_bytewise(p, n, 0);
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief the edits of an editable basic_json_document
|
||||
|
||||
|
||||
@@ -258,6 +258,81 @@ struct number_token
|
||||
bool is_float; ///< a fraction or an exponent
|
||||
};
|
||||
|
||||
/// advance over ASCII digits, eight bytes at a time
|
||||
inline const unsigned char* digit_run(const unsigned char* p, const unsigned char* e) noexcept
|
||||
{
|
||||
constexpr std::uint64_t ones = 0x0101010101010101ull;
|
||||
while (e - p >= 8)
|
||||
{
|
||||
// (the digits become 0..9; a byte above 9, or with bit 7 set, is no digit. A carry
|
||||
// out of a byte with bit 7 set only affects the bytes above, after the first one
|
||||
// that count_trailing_zeros finds.)
|
||||
const std::uint64_t x = read_eight_bytes(p) ^ (ones * 0x30u);
|
||||
const std::uint64_t not_digit = ((x + (ones * 0x76u)) | x) & (ones * 0x80u);
|
||||
if (not_digit != 0)
|
||||
{
|
||||
return p + (static_cast<std::size_t>(count_trailing_zeros(not_digit)) / 8);
|
||||
}
|
||||
p += 8;
|
||||
}
|
||||
while (p != e && is_digit(*p))
|
||||
{
|
||||
++p;
|
||||
}
|
||||
return p;
|
||||
}
|
||||
|
||||
/// whether the n bytes at p are ASCII digits (n > 0)
|
||||
inline bool all_digits(const unsigned char* p, std::size_t n) noexcept
|
||||
{
|
||||
const auto digits = [](const unsigned char* q)
|
||||
{
|
||||
constexpr std::uint64_t ones = 0x0101010101010101ull;
|
||||
const std::uint64_t x = read_eight_bytes(q) ^ (ones * 0x30u);
|
||||
return (((x + (ones * 0x76u)) | x) & (ones * 0x80u)) == 0;
|
||||
};
|
||||
if (n >= 8)
|
||||
{
|
||||
for (std::size_t i = 0; i + 8 < n; i += 8)
|
||||
{
|
||||
if (!digits(p + i))
|
||||
{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return digits(p + n - 8); // (overlapping the bytes before: they are digits)
|
||||
}
|
||||
for (std::size_t i = 0; i < n; ++i)
|
||||
{
|
||||
if (!is_digit(p[i]))
|
||||
{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
/// Whether a float token has the shape that the parser records for most of
|
||||
/// them: [-]digits.digits, with the numbers of digits of the node's layout
|
||||
/// (extra). Then the token is a number of that layout, and the general scan
|
||||
/// that follows is not needed.
|
||||
inline bool plain_float_token(const unsigned char* s, std::size_t len, std::uint16_t extra) noexcept
|
||||
{
|
||||
const std::size_t int_digits = extra & 0xFFu;
|
||||
const std::size_t frac_digits = extra >> 8u;
|
||||
if (int_digits == 0 || int_digits >= 255 || frac_digits == 0 || frac_digits >= 255 || len == 0)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
const std::size_t negative = *s == '-' ? 1 : 0;
|
||||
if (len != negative + int_digits + 1 + frac_digits)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
const unsigned char* const p = s + negative;
|
||||
return !(int_digits > 1 && *p == '0') && p[int_digits] == '.' && all_digits(p, int_digits) && all_digits(p + int_digits + 1, frac_digits);
|
||||
}
|
||||
|
||||
/// whether [s, s + len) is a JSON number (the grammar the parser accepts)
|
||||
inline bool scan_number_token(const unsigned char* s, std::size_t len, number_token& t)
|
||||
{
|
||||
@@ -276,11 +351,7 @@ inline bool scan_number_token(const unsigned char* s, std::size_t len, number_to
|
||||
}
|
||||
else if (*p >= '1' && *p <= '9')
|
||||
{
|
||||
do
|
||||
{
|
||||
++p;
|
||||
}
|
||||
while (p != e && is_digit(*p));
|
||||
p = digit_run(p + 1, e);
|
||||
}
|
||||
else
|
||||
{
|
||||
@@ -292,10 +363,7 @@ inline bool scan_number_token(const unsigned char* s, std::size_t len, number_to
|
||||
if (p != e && *p == '.')
|
||||
{
|
||||
const unsigned char* const f0 = ++p;
|
||||
while (p != e && is_digit(*p))
|
||||
{
|
||||
++p;
|
||||
}
|
||||
p = digit_run(p, e);
|
||||
if (p == f0)
|
||||
{
|
||||
return false;
|
||||
@@ -406,10 +474,15 @@ struct float_range
|
||||
template<typename Check>
|
||||
bool check_distinct_ranges(std::vector<byte_range>& ranges, Check check)
|
||||
{
|
||||
std::sort(ranges.begin(), ranges.end(), [](const byte_range & a, const byte_range & b)
|
||||
// (save() writes the ranges in the order of the nodes, which is sorted already)
|
||||
const auto before = [](const byte_range & a, const byte_range & b)
|
||||
{
|
||||
return a.off != b.off ? a.off < b.off : a.len < b.len;
|
||||
});
|
||||
};
|
||||
if (!std::is_sorted(ranges.begin(), ranges.end(), before))
|
||||
{
|
||||
std::sort(ranges.begin(), ranges.end(), before);
|
||||
}
|
||||
std::size_t end = 0;
|
||||
for (std::size_t i = 0; i < ranges.size(); ++i)
|
||||
{
|
||||
@@ -431,7 +504,8 @@ bool check_distinct_ranges(std::vector<byte_range>& ranges, Check check)
|
||||
/// record layouts that match it), tokens must not overlap.
|
||||
inline bool check_float_ranges(std::vector<float_range>& ranges, const unsigned char* text)
|
||||
{
|
||||
std::sort(ranges.begin(), ranges.end(), [](const float_range & a, const float_range & b)
|
||||
// (save() writes the tokens in the order of the nodes, which is sorted already)
|
||||
const auto before = [](const float_range & a, const float_range & b)
|
||||
{
|
||||
if (a.off != b.off)
|
||||
{
|
||||
@@ -442,7 +516,11 @@ inline bool check_float_ranges(std::vector<float_range>& ranges, const unsigned
|
||||
return a.len < b.len;
|
||||
}
|
||||
return a.extra < b.extra;
|
||||
});
|
||||
};
|
||||
if (!std::is_sorted(ranges.begin(), ranges.end(), before))
|
||||
{
|
||||
std::sort(ranges.begin(), ranges.end(), before);
|
||||
}
|
||||
std::size_t end = 0;
|
||||
std::size_t i = 0;
|
||||
while (i < ranges.size())
|
||||
@@ -452,14 +530,18 @@ inline bool check_float_ranges(std::vector<float_range>& ranges, const unsigned
|
||||
{
|
||||
return false;
|
||||
}
|
||||
number_token t{};
|
||||
const unsigned char* const s = text + r.off;
|
||||
if (!scan_number_token(s, r.len, t) || !float_token_finite(s, r.len, t))
|
||||
std::uint16_t layout = r.extra;
|
||||
if (!plain_float_token(s, r.len, r.extra))
|
||||
{
|
||||
return false;
|
||||
number_token t{};
|
||||
if (!scan_number_token(s, r.len, t) || !float_token_finite(s, r.len, t))
|
||||
{
|
||||
return false;
|
||||
}
|
||||
// the digit layout the parser records (or "many", as compaction writes it)
|
||||
layout = float_layout(t);
|
||||
}
|
||||
// the digit layout the parser records (or "many", as compaction writes it)
|
||||
const std::uint16_t layout = float_layout(t);
|
||||
for (; i < ranges.size() && ranges[i].off == r.off && ranges[i].len == r.len; ++i)
|
||||
{
|
||||
if (ranges[i].extra != layout && ranges[i].extra != 0xFFFFu)
|
||||
|
||||
@@ -29,6 +29,13 @@
|
||||
// NLOHMANN_VIEW_NO_TARGET_ATTRIBUTE (set by the GCC module interface, where GCC
|
||||
// ignores the target attribute and then rejects the SSSE3 intrinsics) keeps the
|
||||
// check portable without disabling the SSE2 code.
|
||||
//
|
||||
// The vector UTF-8 check (utf8_lookup4) is adapted from simdjson
|
||||
// (https://github.com/simdjson/simdjson, Daniel Lemire, Geoff Langdale, John
|
||||
// Keiser, and contributors, available under the Apache 2.0 and MIT licenses;
|
||||
// used here under the MIT license): the "lookup4" algorithm and tables of
|
||||
// J. Keiser and D. Lemire, "Validating UTF-8 In Less Than One Instruction Per
|
||||
// Byte" (2021).
|
||||
#if !defined(JSON_NO_SIMD) && defined(__aarch64__) && (defined(__GNUC__) || defined(__clang__)) && NLOHMANN_VIEW_LITTLE_ENDIAN
|
||||
#include <arm_neon.h>
|
||||
#define NLOHMANN_VIEW_NEON 1
|
||||
|
||||
@@ -763,8 +763,12 @@ class basic_json_view
|
||||
template<typename, view_mode> friend class basic_json_document;
|
||||
template<typename, view_mode> friend class basic_json_view;
|
||||
template<typename, typename> friend class detail::view::editor;
|
||||
template<typename, typename> friend class detail::view::view_side;
|
||||
friend iterator;
|
||||
|
||||
/// whether the view is one of an editable document
|
||||
static constexpr bool is_editable = Editable;
|
||||
|
||||
basic_json_view(const document_data* d, const node* n) noexcept
|
||||
: m_doc(d), m_node(n)
|
||||
{}
|
||||
|
||||
Generated
+19
@@ -10970,6 +10970,13 @@ NLOHMANN_JSON_NAMESPACE_END
|
||||
// use std::from_chars or std::strtold. They are free functions so the lexer
|
||||
// stays focused on scanning (see lexer::convert_number()) and so that other
|
||||
// parsers of JSON text can convert tokens exactly like it does.
|
||||
//
|
||||
// The Eisel-Lemire conversion (eisel_lemire()), the digit comparison for the
|
||||
// cases it cannot decide, and the eight-digits-at-a-time helpers
|
||||
// (is_eight_digits(), parse_eight_digits()) are adapted from fast_float
|
||||
// (https://github.com/fastfloat/fast_float, Daniel Lemire and contributors,
|
||||
// available under the MIT, Apache 2.0, and Boost Software licenses; used here
|
||||
// under the MIT license). The table of powers of five is in pow5_table.hpp.
|
||||
|
||||
NLOHMANN_JSON_NAMESPACE_BEGIN
|
||||
namespace detail
|
||||
@@ -12078,6 +12085,13 @@ NLOHMANN_JSON_NAMESPACE_END
|
||||
// NLOHMANN_JSON_NO_TARGET_ATTRIBUTE (for compilers that ignore the target
|
||||
// attribute and then reject the SSSE3 intrinsics) keeps the check portable
|
||||
// without disabling the SSE2 code.
|
||||
//
|
||||
// The vector UTF-8 check (utf8_lookup4) is adapted from simdjson
|
||||
// (https://github.com/simdjson/simdjson, Daniel Lemire, Geoff Langdale, John
|
||||
// Keiser, and contributors, available under the Apache 2.0 and MIT licenses;
|
||||
// used here under the MIT license): the "lookup4" algorithm and tables of
|
||||
// J. Keiser and D. Lemire, "Validating UTF-8 In Less Than One Instruction Per
|
||||
// Byte" (2021).
|
||||
#if !defined(JSON_NO_SIMD) && defined(__aarch64__) && (defined(__GNUC__) || defined(__clang__)) && defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
|
||||
#include <arm_neon.h>
|
||||
#define JSON_SCAN_NEON 1
|
||||
@@ -32495,6 +32509,11 @@ NLOHMANN_JSON_NAMESPACE_END
|
||||
#include <type_traits> // conditional
|
||||
|
||||
|
||||
// The shortest-digit conversion of doubles (see zmij.hpp) and the writing of
|
||||
// its digits, including the conversion of the digits to text by Xiang JunBo
|
||||
// and the SIMD instruction sequence by Dougall Johnson, are ported from Zmij
|
||||
// by Victor Zverovich (https://github.com/vitaut/zmij, MIT license).
|
||||
//
|
||||
// SSE2 (every x86-64 CPU) and NEON (every 64-bit Arm CPU) convert the 16
|
||||
// digits of a double at once (unless JSON_NO_SIMD selects the portable code)
|
||||
#if !defined(JSON_NO_SIMD) && (defined(__x86_64__) || (defined(_M_X64) && !defined(_M_ARM64EC)))
|
||||
|
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Generated
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Load diff
@@ -21,6 +21,10 @@ python3 tests/benchmarks/json_view/compare.py --data <json_test_data directory>
|
||||
- The other libraries come from the system: pkg-config, or Homebrew (`brew install yyjson simdjson boost`). With
|
||||
`--download`, pinned releases are downloaded instead and checked against their SHA-256. Without Boost headers (or
|
||||
with `--no-boost`), the Boost.JSON columns are skipped, and the results say so.
|
||||
- `--aligned` additionally builds and runs everything with all functions aligned to 64 bytes (`-mllvm
|
||||
-align-all-functions=6` for Clang, `-falign-functions=64 -falign-loops=64` for GCC), and reports both result
|
||||
tables as "default build" and "aligned build". Code layout alone can move a result by a few percent; a difference
|
||||
that appears in only one of the two tables is a layout artifact. Off by default, which doubles the run time.
|
||||
- `--corpus file...` adds files to the corpus benchmark, e.g. those of
|
||||
[simdjson-data](https://github.com/simdjson/simdjson-data) or the
|
||||
[yyjson benchmark](https://github.com/ibireme/yyjson_benchmark).
|
||||
@@ -39,7 +43,7 @@ where `json_view` stands on another architecture; they are not meant for publica
|
||||
|
||||
## What is measured
|
||||
|
||||
`bench_view.cpp` runs four workloads on twitter, citm_catalog, canada, jeopardy, a single tweet (`status`), and a
|
||||
`bench_view.cpp` runs these workloads on twitter, citm_catalog, canada, jeopardy, a single tweet (`status`), and a
|
||||
JSON-RPC request (`rpc`):
|
||||
|
||||
| workload | what it does |
|
||||
@@ -48,6 +52,7 @@ JSON-RPC request (`rpc`):
|
||||
| traverse | parse, then visit every value, convert every number, touch every string and key |
|
||||
| select | parse, then read a few fields per record (e.g. id, user name, and retweet count of each tweet) |
|
||||
| dump | serialize a parsed document (compact) |
|
||||
| parse+dump | build a fresh document, then serialize it (compact), in one timed call |
|
||||
|
||||
`bench_corpus.cpp` runs parse, traverse, and dump on any list of files, so that no library is tuned to a handful of
|
||||
documents. Its dump also writes the numbers as they are in the input: `json_view` with `number_format::source`, and
|
||||
@@ -72,11 +77,32 @@ call follows an untimed call of the same engine: otherwise the engine after `jso
|
||||
cleaning up the tens of thousands of nodes `json::parse` just freed (with glibc, this made `json_view` look 1.7 times
|
||||
slower on citm_catalog traverse).
|
||||
|
||||
`json_view` is an index into the source text, not a tree of owning nodes. Its like-for-like peers are yyjson and
|
||||
simdjson DOM (immutable, indexed, no per-node allocation). Boost.JSON and `json::parse` build mutable, owning DOMs and
|
||||
are reference points for what that costs, not equals; simdjson On-Demand is lazy and forward-only, so it is the other
|
||||
way round: it has no random access to pay for. All engines validate UTF-8 and syntax by default.
|
||||
|
||||
Number conversion differs: `json_view` converts integers while parsing but converts floating-point numbers lazily,
|
||||
when they are read or dumped; yyjson (default flags) and simdjson DOM convert every number while parsing. The cost of
|
||||
float conversion therefore appears in the traverse and dump rows for `json_view`, and in the parse row for the others.
|
||||
For float-heavy documents (canada), the fair reading is a sum of parse and use: the `traverse` workload already
|
||||
includes the parse, and `parse+dump` measures a fresh document and its dump in one timed call; the `dump` row alone
|
||||
leaves the conversion in `json_view` and out of the others. Eager conversion at parse time was prototyped as an opt-in
|
||||
and measured: canada traverse (with its parse) was 4-7 % faster, but parse+dump 11-30 % slower and parse 36-90 % slower. It was
|
||||
dropped, so lazy conversion is the only mode.
|
||||
|
||||
`json_view` can also be edited: `json_editable_document` has the same read API, and the `(editable)` rows in
|
||||
`bench_view` measure it on the same workloads. They are the fair counterpart of Boost.JSON and `json::parse`, which are
|
||||
mutable too; the plain `json_view` rows are the counterpart of yyjson and simdjson DOM, which are not. `bench_edit` adds
|
||||
the read-modify-write workloads. Read the tables with that in mind: an immutable-only library is not compared with an
|
||||
editable `json_view` unless it says so.
|
||||
|
||||
The engines do not all offer the same features, which the numbers should be read with:
|
||||
|
||||
| engine | document | random access | editable | notes |
|
||||
|---|---|---|---|---|
|
||||
| `json_view` | immutable index into the text | yes | no | a fresh document per parse; "reused" parses into the same document |
|
||||
| `json_view` (editable) | index into the text plus edits | yes | yes, in place | `json_editable_document`; keeps member order and number spellings |
|
||||
| yyjson | immutable (`yyjson_read`) | yes | via a mutable copy | |
|
||||
| simdjson DOM | immutable, parser reused | yes | no | "fresh" uses a new parser per parse |
|
||||
| simdjson On-Demand | none: forward-only, lazy | no | no | only traverse and select |
|
||||
|
||||
@@ -8,8 +8,9 @@
|
||||
|
||||
// Same-feature-set benchmark: read-only JSON documents with random access.
|
||||
//
|
||||
// json_view nlohmann/json_view.hpp (fresh document per parse / reused)
|
||||
// yyjson yyjson_read(): immutable document, random access
|
||||
// json_view nlohmann/json_view.hpp (fresh document per parse / reused;
|
||||
// "(editable)": json_editable_document, same read API)
|
||||
// yyjson yyjson_read(): immutable document, random access
|
||||
// simdjson DOM dom::parser (reused, as recommended; "fresh": a new parser
|
||||
// per parse): immutable, random access
|
||||
// references (different feature sets):
|
||||
@@ -19,7 +20,11 @@
|
||||
//
|
||||
// Workloads: parse (build + free), traverse (visit everything, convert every
|
||||
// number, touch every string and key), select (a few fields per document),
|
||||
// dump (compact serialization of the parsed document).
|
||||
// dump (compact serialization of the parsed document), and parse+dump (a fresh
|
||||
// document, then its dump, in one timed call). json_view converts floating-point
|
||||
// numbers lazily (when read or dumped), yyjson and simdjson DOM while parsing:
|
||||
// for float-heavy documents, traverse (which includes the parse) and parse+dump
|
||||
// are the fair reading of the parse and dump rows.
|
||||
// All engines run interleaved in every round, each timed call after an untimed
|
||||
// one of the same engine; the best round is reported.
|
||||
#include <nlohmann/json_view.hpp>
|
||||
@@ -43,6 +48,8 @@
|
||||
|
||||
using nlohmann::json;
|
||||
using nlohmann::json_document;
|
||||
using nlohmann::json_editable_document;
|
||||
using nlohmann::json_editable_view;
|
||||
using nlohmann::json_view;
|
||||
|
||||
static volatile double g_sink;
|
||||
@@ -55,7 +62,8 @@ struct stats
|
||||
|
||||
// ---------------- traversal ----------------
|
||||
|
||||
static void walk(json_view v, stats& st)
|
||||
template<class V>
|
||||
static void walk_view(V v, stats& st)
|
||||
{
|
||||
++st.nodes;
|
||||
switch (v.type())
|
||||
@@ -64,32 +72,42 @@ static void walk(json_view v, stats& st)
|
||||
for (auto it = v.begin(); it != v.end(); ++it)
|
||||
{
|
||||
st.str += it.key().size();
|
||||
walk(*it, st);
|
||||
walk_view<V>(*it, st);
|
||||
}
|
||||
break;
|
||||
case json::value_t::array:
|
||||
for (const json_view e : v)
|
||||
for (const V e : v)
|
||||
{
|
||||
walk(e, st);
|
||||
walk_view<V>(e, st);
|
||||
}
|
||||
break;
|
||||
case json::value_t::string:
|
||||
st.str += v.get_string().size();
|
||||
break;
|
||||
case json::value_t::number_integer:
|
||||
st.num += static_cast<double>(v.get<std::int64_t>());
|
||||
st.num += static_cast<double>(v.template get<std::int64_t>());
|
||||
break;
|
||||
case json::value_t::number_unsigned:
|
||||
st.num += static_cast<double>(v.get<std::uint64_t>());
|
||||
st.num += static_cast<double>(v.template get<std::uint64_t>());
|
||||
break;
|
||||
case json::value_t::number_float:
|
||||
st.num += v.get<double>();
|
||||
st.num += v.template get<double>();
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void walk(json_view v, stats& st)
|
||||
{
|
||||
walk_view<json_view>(v, st);
|
||||
}
|
||||
|
||||
static void walk(json_editable_view v, stats& st)
|
||||
{
|
||||
walk_view<json_editable_view>(v, st);
|
||||
}
|
||||
|
||||
static void walk(const json& j, stats& st)
|
||||
{
|
||||
++st.nodes;
|
||||
@@ -300,20 +318,21 @@ static void walk(const boost::json::value& v, stats& st)
|
||||
// status (one tweet): id, user.screen_name, retweet_count
|
||||
// rpc: method, params.minuend, id
|
||||
|
||||
static double pick(const std::string& name, json_view r)
|
||||
template<class V>
|
||||
static double pick_view(const std::string& name, V r)
|
||||
{
|
||||
double acc = 0;
|
||||
if (name == "twitter" || name == "status")
|
||||
{
|
||||
auto one = [&](json_view s)
|
||||
auto one = [&](V s)
|
||||
{
|
||||
acc += static_cast<double>(s["id"].get<std::uint64_t>());
|
||||
acc += static_cast<double>(s["id"].template get<std::uint64_t>());
|
||||
acc += static_cast<double>(s["user"]["screen_name"].get_string().size());
|
||||
acc += static_cast<double>(s["retweet_count"].get<std::int64_t>());
|
||||
acc += static_cast<double>(s["retweet_count"].template get<std::int64_t>());
|
||||
};
|
||||
if (name == "twitter")
|
||||
{
|
||||
for (const json_view s : r["statuses"])
|
||||
for (const V s : r["statuses"])
|
||||
{
|
||||
one(s);
|
||||
}
|
||||
@@ -325,20 +344,20 @@ static double pick(const std::string& name, json_view r)
|
||||
}
|
||||
else if (name == "citm_catalog")
|
||||
{
|
||||
for (const json_view p : r["performances"])
|
||||
for (const V p : r["performances"])
|
||||
{
|
||||
acc += static_cast<double>(p["id"].get<std::uint64_t>() + p["eventId"].get<std::uint64_t>() + p["seatCategories"].size());
|
||||
acc += static_cast<double>(p["id"].template get<std::uint64_t>() + p["eventId"].template get<std::uint64_t>() + p["seatCategories"].size());
|
||||
}
|
||||
acc += static_cast<double>(r["events"].size());
|
||||
}
|
||||
else if (name == "canada")
|
||||
{
|
||||
const json_view g = r["features"][0]["geometry"];
|
||||
const V g = r["features"][0]["geometry"];
|
||||
acc += static_cast<double>(r["type"].get_string().size() + g["type"].get_string().size() + g["coordinates"].size());
|
||||
}
|
||||
else if (name == "jeopardy")
|
||||
{
|
||||
for (const json_view q : r)
|
||||
for (const V q : r)
|
||||
{
|
||||
acc += q["round"].get_string() == "Final Jeopardy!" ? 1 : 0;
|
||||
acc += static_cast<double>(q["category"].get_string().size());
|
||||
@@ -347,11 +366,21 @@ static double pick(const std::string& name, json_view r)
|
||||
else if (name == "rpc")
|
||||
{
|
||||
acc += static_cast<double>(r["method"].get_string().size());
|
||||
acc += static_cast<double>(r["params"]["minuend"].get<std::int64_t>() + r["id"].get<std::int64_t>());
|
||||
acc += static_cast<double>(r["params"]["minuend"].template get<std::int64_t>() + r["id"].template get<std::int64_t>());
|
||||
}
|
||||
return acc;
|
||||
}
|
||||
|
||||
static double pick(const std::string& name, json_view r)
|
||||
{
|
||||
return pick_view<json_view>(name, r);
|
||||
}
|
||||
|
||||
static double pick(const std::string& name, json_editable_view r)
|
||||
{
|
||||
return pick_view<json_editable_view>(name, r);
|
||||
}
|
||||
|
||||
static double pick(const std::string& name, const json& r)
|
||||
{
|
||||
double acc = 0;
|
||||
@@ -634,15 +663,35 @@ int main(int argc, char** argv)
|
||||
walk(json::parse(dc.text), a);
|
||||
auto d = json_document::parse(dc.text);
|
||||
walk(d.root(), b);
|
||||
auto ed = json_editable_document::parse(dc.text);
|
||||
stats e;
|
||||
walk(ed.root(), e);
|
||||
yyjson_doc* y = yyjson_read(dc.text.data(), dc.text.size(), 0);
|
||||
walk(yyjson_doc_get_root(y), c);
|
||||
simdjson::dom::parser p;
|
||||
walk(p.parse(dc.text).value(), dd);
|
||||
const bool ok = a.nodes == b.nodes && a.nodes == c.nodes && a.nodes == dd.nodes && a.str == b.str && a.str == c.str && a.str == dd.str
|
||||
const bool ok = a.nodes == b.nodes && a.nodes == e.nodes && a.str == e.str && std::fabs(a.num - e.num) <= 1e-9 * std::fabs(a.num) && a.nodes == c.nodes && a.nodes == dd.nodes && a.str == b.str && a.str == c.str && a.str == dd.str
|
||||
&& std::fabs(a.num - b.num) <= 1e-9 * std::fabs(a.num) && std::fabs(a.num - c.num) <= 1e-9 * std::fabs(a.num);
|
||||
const double pa = pick(dc.name, json::parse(dc.text)), pb = pick(dc.name, d.root()), pc = pick(dc.name, yyjson_doc_get_root(y)), pd = pick(dc.name, p.parse(dc.text).value());
|
||||
std::printf("check %-13s traverse %s select %s\n", dc.name.c_str(), ok ? "OK" : "MISMATCH", (pa == pb && pa == pc && pa == pd) ? "OK" : "MISMATCH");
|
||||
const double pa = pick(dc.name, json::parse(dc.text)), pb = pick(dc.name, d.root()), pe = pick(dc.name, ed.root()), pc = pick(dc.name, yyjson_doc_get_root(y)), pd = pick(dc.name, p.parse(dc.text).value());
|
||||
std::printf("check %-13s traverse %s select %s\n", dc.name.c_str(), ok ? "OK" : "MISMATCH", (pa == pb && pa == pe && pa == pc && pa == pd) ? "OK" : "MISMATCH");
|
||||
yyjson_doc_free(y);
|
||||
|
||||
// the dumps of the engines may format floats differently, so only: every dump is non-empty, and the
|
||||
// dump of json_view (also editable) and of json::parse parse back to the same number of nodes
|
||||
const std::string dj = json::parse(dc.text).dump();
|
||||
const std::string dv = d.root().dump();
|
||||
const std::string de = ed.root().dump();
|
||||
std::size_t yn = 0;
|
||||
yyjson_doc* y2 = yyjson_read(dc.text.data(), dc.text.size(), 0);
|
||||
char* yo = yyjson_write(y2, 0, &yn);
|
||||
const bool dumps_ok = !dj.empty() && !dv.empty() && !de.empty() && yo != nullptr && yn > 0 && !simdjson::to_string(p.parse(dc.text).value()).empty();
|
||||
std::free(yo);
|
||||
yyjson_doc_free(y2);
|
||||
stats sj_nodes, sv_nodes, se_nodes;
|
||||
walk(json::parse(dj), sj_nodes);
|
||||
walk(json::parse(dv), sv_nodes);
|
||||
walk(json::parse(de), se_nodes);
|
||||
std::printf("check %-13s dump %s\n", dc.name.c_str(), (dumps_ok && sj_nodes.nodes == a.nodes && sv_nodes.nodes == a.nodes && se_nodes.nodes == a.nodes) ? "OK" : "MISMATCH");
|
||||
}
|
||||
|
||||
std::FILE* csv = std::fopen("bench_view.csv", "w");
|
||||
@@ -669,6 +718,7 @@ int main(int argc, char** argv)
|
||||
workloads.push_back({"parse", {
|
||||
{"json_view", [&] { auto d = json_document::parse(s); g_sink = static_cast<double>(d.node_count()); }},
|
||||
{"json_view (reused)", [&] { reused.read(s); g_sink = static_cast<double>(reused.node_count()); }},
|
||||
{"json_view (editable)", [&] { auto d = json_editable_document::parse(s); g_sink = static_cast<double>(d.root().size()); }},
|
||||
{"yyjson", [&] { yyjson_doc* d = yyjson_read(s.data(), s.size(), 0); g_sink = static_cast<double>(yyjson_doc_get_val_count(d)); yyjson_doc_free(d); }},
|
||||
{"simdjson DOM", [&] { auto e = sj.parse(ps).value_unsafe(); g_sink = e.is_object(); }},
|
||||
{"simdjson DOM (fresh)", [&] { simdjson::dom::parser p; auto e = p.parse(ps).value_unsafe(); g_sink = e.is_object(); }},
|
||||
@@ -680,6 +730,7 @@ int main(int argc, char** argv)
|
||||
workloads.push_back({"traverse", {
|
||||
{"json_view", [&] { auto d = json_document::parse(s); stats st; walk(d.root(), st); g_sink = st.num; }},
|
||||
{"json_view (reused)", [&] { reused.read(s); stats st; walk(reused.root(), st); g_sink = st.num; }},
|
||||
{"json_view (editable)", [&] { auto d = json_editable_document::parse(s); stats st; walk(d.root(), st); g_sink = st.num; }},
|
||||
{"yyjson", [&] { yyjson_doc* d = yyjson_read(s.data(), s.size(), 0); stats st; walk(yyjson_doc_get_root(d), st); g_sink = st.num; yyjson_doc_free(d); }},
|
||||
{"simdjson DOM", [&] { stats st; walk(sj.parse(ps).value_unsafe(), st); g_sink = st.num; }},
|
||||
{"simdjson OD", [&] { auto d = od.iterate(ps).value_unsafe(); stats st; walk_od(d.get_value().value_unsafe(), st); g_sink = st.num; }},
|
||||
@@ -691,15 +742,31 @@ int main(int argc, char** argv)
|
||||
workloads.push_back({"select", {
|
||||
{"json_view", [&] { auto d = json_document::parse(s); g_sink = pick(name, d.root()); }},
|
||||
{"json_view (reused)", [&] { reused.read(s); g_sink = pick(name, reused.root()); }},
|
||||
{"json_view (editable)", [&] { auto d = json_editable_document::parse(s); g_sink = pick(name, d.root()); }},
|
||||
{"yyjson", [&] { yyjson_doc* d = yyjson_read(s.data(), s.size(), 0); g_sink = pick(name, yyjson_doc_get_root(d)); yyjson_doc_free(d); }},
|
||||
{"simdjson DOM", [&] { g_sink = pick(name, sj.parse(ps).value_unsafe()); }},
|
||||
{"simdjson OD", [&] { auto d = od.iterate(ps).value_unsafe(); g_sink = pick_od(name, d); }},
|
||||
{"json::parse", [&] { json j = json::parse(s); g_sink = pick(name, j); }},
|
||||
}});
|
||||
// pipeline: a fresh document, then a dump of it, in one timed call
|
||||
// (simdjson DOM reuses its parser, as in the parse row); the traverse
|
||||
// workload above is already parse+traverse
|
||||
workloads.push_back({"parse+dump", {
|
||||
{"json_view", [&] { auto d = json_document::parse(s); std::string o = d.root().dump(); g_sink = static_cast<double>(o.size()); }},
|
||||
{"json_view (editable)", [&] { auto d = json_editable_document::parse(s); std::string o = d.root().dump(); g_sink = static_cast<double>(o.size()); }},
|
||||
{"yyjson", [&] { yyjson_doc* d = yyjson_read(s.data(), s.size(), 0); std::size_t n = 0; char* o = yyjson_write(d, 0, &n); g_sink = static_cast<double>(n); std::free(o); yyjson_doc_free(d); }},
|
||||
{"simdjson DOM", [&] { std::string o = simdjson::to_string(sj.parse(ps).value_unsafe()); g_sink = static_cast<double>(o.size()); }},
|
||||
#if JSON_VIEW_BENCH_BOOST
|
||||
{"Boost.JSON", [&] { boost::json::monotonic_resource mr; auto v = boost::json::parse(s, &mr); std::string o = boost::json::serialize(v); g_sink = static_cast<double>(o.size()); }},
|
||||
#endif
|
||||
{"json::parse", [&] { json j = json::parse(s); std::string o = j.dump(); g_sink = static_cast<double>(o.size()); }},
|
||||
}});
|
||||
{
|
||||
// serialization of an already parsed document
|
||||
static json_document vd;
|
||||
vd.read(s);
|
||||
static json_editable_document ed = json_editable_document::parse(s);
|
||||
ed = json_editable_document::parse(s);
|
||||
static yyjson_doc* yd = nullptr;
|
||||
if (yd)
|
||||
{
|
||||
@@ -713,6 +780,7 @@ int main(int argc, char** argv)
|
||||
jd = json::parse(s);
|
||||
workloads.push_back({"dump", {
|
||||
{"json_view", [&] { std::string o = vd.root().dump(); g_sink = static_cast<double>(o.size()); }},
|
||||
{"json_view (editable)", [&] { std::string o = ed.root().dump(); g_sink = static_cast<double>(o.size()); }},
|
||||
{"yyjson", [&] { std::size_t n = 0; char* o = yyjson_write(yd, 0, &n); g_sink = static_cast<double>(n); std::free(o); }},
|
||||
{"simdjson DOM", [&] { std::string o = simdjson::to_string(se); g_sink = static_cast<double>(o.size()); }},
|
||||
{"json::parse", [&] { std::string o = jd.dump(); g_sink = static_cast<double>(o.size()); }},
|
||||
@@ -740,7 +808,7 @@ int main(int argc, char** argv)
|
||||
}
|
||||
}
|
||||
const double ref = best[0];
|
||||
std::printf("%-13s %-9s", dc.name.c_str(), wl.first.c_str());
|
||||
std::printf("%-13s %-14s", dc.name.c_str(), wl.first.c_str());
|
||||
for (std::size_t k = 0; k < wl.second.size(); ++k)
|
||||
{
|
||||
const double us = best[k] / 1e3;
|
||||
|
||||
@@ -239,6 +239,8 @@ def main():
|
||||
ap.add_argument('--download', action='store_true', help='use pinned downloads instead of system libraries')
|
||||
ap.add_argument('--no-boost', action='store_true', help='skip Boost.JSON')
|
||||
ap.add_argument('--native', action='store_true', help='compile for this CPU (-march=native / -mcpu=native)')
|
||||
ap.add_argument('--aligned', action='store_true',
|
||||
help='also build and run with all functions (and loops) aligned, to make code layout artifacts visible')
|
||||
ap.add_argument('--rounds', type=int, default=30, help='rounds of bench_view (default: 30)')
|
||||
ap.add_argument('--corpus', nargs='*', default=[], help='more files for bench_corpus')
|
||||
ap.add_argument('--build-dir', default=os.path.join(HERE, 'build'), help='where to build (default: build/ next to this script)')
|
||||
@@ -282,32 +284,46 @@ def main():
|
||||
+ ['-I' + d for d in lib.include])
|
||||
objects.append(obj)
|
||||
|
||||
binaries = {}
|
||||
for bench in ['bench_view', 'bench_corpus', 'bench_edit', 'bench_decode']:
|
||||
exe = os.path.join(args.build_dir, bench)
|
||||
run(cxx + flags + include + [os.path.join(HERE, bench + '.cpp')] + objects + link + ['-o', exe])
|
||||
binaries[bench] = exe
|
||||
cxx_version = output(cxx + ['--version'])
|
||||
is_clang = 'clang' in cxx_version.lower()
|
||||
# alignment flags: functions and (gcc) loops on 64-byte boundaries
|
||||
align_flags = ['-mllvm', '-align-all-functions=6'] if is_clang else ['-falign-functions=64', '-falign-loops=64']
|
||||
|
||||
# the builds: the default one and, with --aligned, one with aligned code
|
||||
variants = [('default build', args.build_dir, [])]
|
||||
if args.aligned:
|
||||
variants.append(('aligned build', os.path.join(args.build_dir, 'aligned'), align_flags))
|
||||
|
||||
# run: bench_view on its documents, bench_corpus on those and the given files
|
||||
corpus = [os.path.join(args.data, f) for f in DEFAULT_CORPUS] + args.corpus
|
||||
outputs = {}
|
||||
outputs['bench_view'] = run([binaries['bench_view'], args.data, str(args.rounds)], cwd=args.build_dir,
|
||||
capture_output=True, text=True).stdout
|
||||
outputs['bench_corpus'] = run([binaries['bench_corpus']] + corpus, cwd=args.build_dir,
|
||||
capture_output=True, text=True).stdout
|
||||
outputs['bench_edit'] = run([binaries['bench_edit'], args.data, str(max(1, args.rounds // 2))], cwd=args.build_dir,
|
||||
capture_output=True, text=True).stdout
|
||||
outputs['bench_decode'] = run([binaries['bench_decode'], args.data, str(max(1, args.rounds // 2))], cwd=args.build_dir,
|
||||
capture_output=True, text=True).stdout
|
||||
for name, text in outputs.items():
|
||||
print(text)
|
||||
# label -> {benchmark: output}
|
||||
all_outputs = {}
|
||||
for label, build_dir, extra in variants:
|
||||
os.makedirs(build_dir, exist_ok=True)
|
||||
binaries = {}
|
||||
for bench in ['bench_view', 'bench_corpus', 'bench_edit', 'bench_decode']:
|
||||
exe = os.path.join(build_dir, bench)
|
||||
run(cxx + flags + extra + include + [os.path.join(HERE, bench + '.cpp')] + objects + link + ['-o', exe])
|
||||
binaries[bench] = exe
|
||||
|
||||
# run: bench_view on its documents, bench_corpus on those and the given files
|
||||
outputs = {}
|
||||
outputs['bench_view'] = run([binaries['bench_view'], args.data, str(args.rounds)], cwd=build_dir,
|
||||
capture_output=True, text=True).stdout
|
||||
outputs['bench_corpus'] = run([binaries['bench_corpus']] + corpus, cwd=build_dir,
|
||||
capture_output=True, text=True).stdout
|
||||
outputs['bench_edit'] = run([binaries['bench_edit'], args.data, str(max(1, args.rounds // 2))], cwd=build_dir,
|
||||
capture_output=True, text=True).stdout
|
||||
outputs['bench_decode'] = run([binaries['bench_decode'], args.data, str(max(1, args.rounds // 2))],
|
||||
cwd=build_dir, capture_output=True, text=True).stdout
|
||||
for name, text in outputs.items():
|
||||
print(text)
|
||||
all_outputs[label] = outputs
|
||||
|
||||
# results with their metadata
|
||||
now = datetime.datetime.now()
|
||||
host = re.sub(r'[^A-Za-z0-9-]+', '-', platform.node().split('.')[0]) or 'host'
|
||||
stem = os.path.join(HERE, 'results', f'{now:%Y-%m-%d}-{host}')
|
||||
os.makedirs(os.path.dirname(stem), exist_ok=True)
|
||||
cxx_version = output(cxx + ['--version'])
|
||||
compiler_version = cxx_version.splitlines()[0] if cxx_version else ' '.join(cxx)
|
||||
meta = [
|
||||
('date', f'{now:%Y-%m-%d %H:%M}'),
|
||||
@@ -316,6 +332,7 @@ def main():
|
||||
('OS', f'{platform.system()} {platform.release()} ({platform.machine()})'),
|
||||
('compiler', compiler_version),
|
||||
('flags', ' '.join(flags)),
|
||||
('aligned results', ('included (flags: ' + ' '.join(align_flags) + ')') if args.aligned else 'not included'),
|
||||
('yyjson', libs['yyjson'].version),
|
||||
('simdjson', libs['simdjson'].version),
|
||||
('Boost.JSON', libs['boost'].version if with_boost else 'skipped (not found)'),
|
||||
@@ -328,15 +345,20 @@ def main():
|
||||
f.write('| | |\n|---|---|\n')
|
||||
for key, value in meta:
|
||||
f.write(f'| {key} | {value} |\n')
|
||||
for name, text in outputs.items():
|
||||
f.write(f'\n## {name}\n\n```\n{text.rstrip()}\n```\n')
|
||||
for label, outputs in all_outputs.items():
|
||||
# (without --aligned there is only the default build, and no extra heading level)
|
||||
prefix = f'{label}: ' if args.aligned else ''
|
||||
for name, text in outputs.items():
|
||||
f.write(f'\n## {prefix}{name}\n\n```\n{text.rstrip()}\n```\n')
|
||||
with open(stem + '.csv', 'w', encoding='utf-8') as out:
|
||||
out.write(''.join(f'# {key}: {value}\n' for key, value in meta))
|
||||
for name in ['bench_view', 'bench_corpus', 'bench_edit', 'bench_decode']:
|
||||
path = os.path.join(args.build_dir, name + '.csv')
|
||||
if os.path.isfile(path):
|
||||
with open(path, encoding='utf-8') as f:
|
||||
out.write(f'# {name}\n' + f.read())
|
||||
for label, build_dir, _ in variants:
|
||||
for name in ['bench_view', 'bench_corpus', 'bench_edit', 'bench_decode']:
|
||||
path = os.path.join(build_dir, name + '.csv')
|
||||
if os.path.isfile(path):
|
||||
with open(path, encoding='utf-8') as f:
|
||||
# (the default build keeps its plain section names)
|
||||
out.write(f'# {name}' + (f' ({label})' if args.aligned else '') + '\n' + f.read())
|
||||
print(f'results: {stem}.md, {stem}.csv')
|
||||
|
||||
|
||||
|
||||
@@ -3030,3 +3030,144 @@ TEST_CASE("a json_sax_dom_parser keeps the values read before a parse error")
|
||||
CHECK(read_before_error<nlohmann::ordered_json>(c.first) == c.second);
|
||||
}
|
||||
}
|
||||
|
||||
TEST_CASE("object keys are delivered decoded and validated")
|
||||
{
|
||||
// json_sax::key and the key event of a parser callback see the decoded name, and
|
||||
// only after the whole name was scanned and validated
|
||||
const auto keys_of_format = [](const std::string & text, const json::input_format_t format)
|
||||
{
|
||||
SaxEventLogger l;
|
||||
json::sax_parse(text, &l, format);
|
||||
std::vector<std::string> keys;
|
||||
for (const auto& e : l.events)
|
||||
{
|
||||
if (e.compare(0, 4, "key(") == 0)
|
||||
{
|
||||
keys.push_back(e.substr(4, e.size() - 5));
|
||||
}
|
||||
}
|
||||
return keys;
|
||||
};
|
||||
|
||||
const auto keys_of = [&keys_of_format](const std::string & text)
|
||||
{
|
||||
return keys_of_format(text, json::input_format_t::json);
|
||||
};
|
||||
|
||||
const auto callback_keys_of = [](const std::string & text)
|
||||
{
|
||||
std::vector<std::string> keys;
|
||||
const json::parser_callback_t cb = [&keys](int /*depth*/, json::parse_event_t event, json & parsed)
|
||||
{
|
||||
if (event == json::parse_event_t::key)
|
||||
{
|
||||
keys.push_back(parsed.get<std::string>());
|
||||
}
|
||||
return true;
|
||||
};
|
||||
const json parsed = json::parse(text, cb, false);
|
||||
static_cast<void>(parsed);
|
||||
return keys;
|
||||
};
|
||||
|
||||
SECTION("different spellings of a name yield the same string")
|
||||
{
|
||||
const std::string e_acute = "\xc3\xa9";
|
||||
const std::string text = std::string(R"({"/":1,"\/":2,"\u002f":3,"\u00e9":4,"\u00E9":5,")") + e_acute + R"(":6})";
|
||||
const std::vector<std::string> expected = {"/", "/", "/", e_acute, e_acute, e_acute};
|
||||
CHECK(keys_of(text) == expected);
|
||||
CHECK(callback_keys_of(text) == expected);
|
||||
}
|
||||
|
||||
SECTION("escape sequences are decoded")
|
||||
{
|
||||
const std::string simple = R"({"\"\\\/\b\f\n\r\t":1})";
|
||||
const std::vector<std::string> simple_expected = {std::string("\"\\/\b\f\n\r\t")};
|
||||
CHECK(keys_of(simple) == simple_expected);
|
||||
CHECK(callback_keys_of(simple) == simple_expected);
|
||||
|
||||
const std::string nul = R"({"\u0000":1})";
|
||||
const std::vector<std::string> nul_expected = {std::string(1, '\0')};
|
||||
CHECK(keys_of(nul) == nul_expected);
|
||||
CHECK(callback_keys_of(nul) == nul_expected);
|
||||
|
||||
const std::string pair = R"({"\ud83d\ude00":1})";
|
||||
const std::vector<std::string> pair_expected = {"\xf0\x9f\x98\x80"};
|
||||
CHECK(keys_of(pair) == pair_expected);
|
||||
CHECK(callback_keys_of(pair) == pair_expected);
|
||||
}
|
||||
|
||||
SECTION("no normalization and no case conversion")
|
||||
{
|
||||
const std::string text = std::string("{\"\xc3\xa9\":1,\"e\xcc\x81\":2,\"A\":3,\"a\":4}");
|
||||
const std::vector<std::string> expected = {"\xc3\xa9", "e\xcc\x81", "A", "a"};
|
||||
CHECK(keys_of(text) == expected);
|
||||
CHECK(callback_keys_of(text) == expected);
|
||||
}
|
||||
|
||||
SECTION("a name that is not valid is not delivered")
|
||||
{
|
||||
const std::vector<std::string> texts =
|
||||
{
|
||||
R"({"\u12G4":1})", // malformed escape
|
||||
R"({"\udc00":1})", // lone low surrogate
|
||||
R"({"\ud800":1})", // lone high surrogate
|
||||
R"({"\ud800\u0041":1})", // high surrogate not followed by a low one
|
||||
R"({"\x":1})", // unknown escape
|
||||
std::string("{\"a\x01\":1}"), // control character
|
||||
std::string("{\"\xff\":1}") // ill-formed UTF-8
|
||||
};
|
||||
for (const auto& text : texts)
|
||||
{
|
||||
CAPTURE(text)
|
||||
CHECK(!json::accept(text));
|
||||
CHECK(keys_of(text).empty());
|
||||
CHECK(callback_keys_of(text).empty());
|
||||
}
|
||||
}
|
||||
|
||||
SECTION("a name is delivered before the following colon is read")
|
||||
{
|
||||
const std::string text = R"({"a" 1})";
|
||||
const std::vector<std::string> expected = {"a"};
|
||||
CHECK(!json::accept(text));
|
||||
CHECK(keys_of(text) == expected);
|
||||
CHECK(callback_keys_of(text) == expected);
|
||||
}
|
||||
|
||||
SECTION("a repeated name is delivered once per occurrence")
|
||||
{
|
||||
const std::string text = R"({"a":1,"a":2})";
|
||||
const std::vector<std::string> expected = {"a", "a"};
|
||||
CHECK(keys_of(text) == expected);
|
||||
CHECK(callback_keys_of(text) == expected);
|
||||
}
|
||||
|
||||
SECTION("binary formats pass the stored bytes through")
|
||||
{
|
||||
const std::string stored = "\xff\\";
|
||||
const std::vector<std::string> expected = {stored};
|
||||
const auto keys_of_bytes = [&keys_of_format](const std::vector<std::uint8_t>& v, json::input_format_t format)
|
||||
{
|
||||
std::string text;
|
||||
for (const auto byte : v)
|
||||
{
|
||||
text.push_back(static_cast<char>(byte));
|
||||
}
|
||||
return keys_of_format(text, format);
|
||||
};
|
||||
|
||||
CHECK(keys_of_bytes({0xA1, 0x62, 0xFF, 0x5C, 0x01}, json::input_format_t::cbor) == expected);
|
||||
CHECK(keys_of_bytes({0x81, 0xA2, 0xFF, 0x5C, 0x01}, json::input_format_t::msgpack) == expected);
|
||||
CHECK(keys_of_bytes({'{', 'i', 2, 0xFF, 0x5C, 'i', 1, '}'}, json::input_format_t::ubjson) == expected);
|
||||
CHECK(keys_of_bytes({0x0D, 0, 0, 0, 0x10, 0xFF, 0x5C, 0, 1, 0, 0, 0, 0}, json::input_format_t::bson) == expected);
|
||||
}
|
||||
|
||||
SECTION("BON8 rejects ill-formed UTF-8 in a name")
|
||||
{
|
||||
const std::vector<std::string> valid = {"\\"};
|
||||
CHECK(keys_of_format(std::string("\x87\x5C\x91"), json::input_format_t::bon8) == valid);
|
||||
CHECK(keys_of_format(std::string("\x87\xC3\x28\x91"), json::input_format_t::bon8).empty());
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,364 @@
|
||||
// __ _____ _____ _____
|
||||
// __| | __| | | | JSON for Modern C++ (supporting code)
|
||||
// | | |__ | | | | | | version 3.12.0
|
||||
// |_____|_____|_____|_|___| https://github.com/nlohmann/json
|
||||
//
|
||||
// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
|
||||
// SPDX-License-Identifier: MIT
|
||||
|
||||
#include "doctest_compatibility.h"
|
||||
|
||||
#include <nlohmann/json_view.hpp>
|
||||
using nlohmann::json;
|
||||
using nlohmann::ordered_json;
|
||||
using nlohmann::json_document;
|
||||
using nlohmann::ordered_json_editable_document;
|
||||
using nlohmann::json_view;
|
||||
using nlohmann::ordered_json_document;
|
||||
|
||||
#include "json_view_test_helpers.hpp"
|
||||
using json_view_test::generator;
|
||||
|
||||
#include <array>
|
||||
#include <cstddef>
|
||||
#include <string>
|
||||
#include <vector>
|
||||
|
||||
// These tests were split off unit-json_view_dump.cpp, whose object file got too
|
||||
// large for the MinGW assembler ("file too big"). Like that file, this one is
|
||||
// also built with C++17, as it mentions JSON_HAS_CPP_17.
|
||||
|
||||
TEST_CASE("json_view comparison")
|
||||
{
|
||||
SECTION("equality of the values parse() produces")
|
||||
{
|
||||
generator g;
|
||||
std::vector<std::string> texts;
|
||||
for (int i = 0; i < 600; ++i)
|
||||
{
|
||||
std::string text;
|
||||
g.value(text, 0);
|
||||
texts.push_back(text);
|
||||
// the same value written differently: sorted keys, canonical numbers
|
||||
texts.push_back(json::parse(text).dump(1));
|
||||
}
|
||||
for (std::size_t i = 0; i + 2 < texts.size(); ++i)
|
||||
{
|
||||
for (std::size_t k = i; k < i + 3; ++k)
|
||||
{
|
||||
CAPTURE(texts[i])
|
||||
CAPTURE(texts[k])
|
||||
const json_document a = json_document::parse(texts[i]);
|
||||
const json_document b = json_document::parse(texts[k]);
|
||||
const json ja = json::parse(texts[i]);
|
||||
const json jb = json::parse(texts[k]);
|
||||
CHECK((a.root() == b.root()) == (ja == jb));
|
||||
CHECK((a.root() != b.root()) == (ja != jb));
|
||||
CHECK((a.root() == jb) == (ja == jb));
|
||||
CHECK((jb == a.root()) == (ja == jb));
|
||||
CHECK((a.root() != jb) == (ja != jb));
|
||||
CHECK((jb != a.root()) == (ja != jb));
|
||||
|
||||
// ordered_json compares members in order
|
||||
const ordered_json_document oa = ordered_json_document::parse(texts[i]);
|
||||
const ordered_json_document ob = ordered_json_document::parse(texts[k]);
|
||||
const ordered_json oja = ordered_json::parse(texts[i]);
|
||||
const ordered_json ojb = ordered_json::parse(texts[k]);
|
||||
CHECK((oa.root() == ob.root()) == (oja == ojb));
|
||||
CHECK((oa.root() == ojb) == (oja == ojb));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
SECTION("objects whose first keys differ or repeat")
|
||||
{
|
||||
const std::array<const char*, 17> texts =
|
||||
{
|
||||
{
|
||||
R"({"a":1,"b":2})", R"({"a":1,"c":2})", R"({"b":1,"a":2})", R"({"a":1,"a":2,"b":3})", R"({"a":2,"b":3})",
|
||||
R"({"a":1,"b":1,"a":2})", R"({"a":2,"b":1})", R"({"a":1,"a":2})", R"({"b":1})", R"({"a":1,"b":2,"c":3,"d":4,"e":5})",
|
||||
R"({"a":1,"b":2,"c":3,"d":4,"f":5})", R"({"a":1,"b":2,"c":3,"a":4,"e":5})", R"({"a":4,"b":2,"c":3,"e":5})",
|
||||
R"({"\u0061":1,"b":2})", R"({})", R"([{"a":1,"b":2}])", R"([{"a":1,"c":2}])"
|
||||
}
|
||||
};
|
||||
for (const char* const x : texts)
|
||||
{
|
||||
for (const char* const y : texts)
|
||||
{
|
||||
CAPTURE(x)
|
||||
CAPTURE(y)
|
||||
const ordered_json_document dx = ordered_json_document::parse(x);
|
||||
const ordered_json_document dy = ordered_json_document::parse(y);
|
||||
const ordered_json_editable_document ex = ordered_json_editable_document::parse(x);
|
||||
const ordered_json jx = ordered_json::parse(x);
|
||||
const ordered_json jy = ordered_json::parse(y);
|
||||
CHECK((dx.root() == dy.root()) == (jx == jy));
|
||||
CHECK((dx.root() == jy) == (jx == jy));
|
||||
CHECK((ex.root() == dy.root()) == (jx == jy));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
SECTION("objects with duplicate keys, small and large")
|
||||
{
|
||||
// n members with keys in descending order; with duplicates, some keys
|
||||
// repeat later (the first after unique ones in key order); in reverse,
|
||||
// the members are in ascending key order
|
||||
const auto object = [](int n, bool duplicates, bool reverse, int value)
|
||||
{
|
||||
std::string s = "{";
|
||||
for (int i = 0; i < n; ++i)
|
||||
{
|
||||
const int k = reverse ? i : n - 1 - i;
|
||||
s += (i != 0 ? ",\"k" : "\"k") + std::to_string(100 + k) + "\":" + std::to_string(value + k);
|
||||
}
|
||||
if (duplicates)
|
||||
{
|
||||
for (int k = n / 2; k < n; k += 3)
|
||||
{
|
||||
s += ",\"k" + std::to_string(100 + k) + "\":" + std::to_string(value + k);
|
||||
}
|
||||
}
|
||||
return s + "}";
|
||||
};
|
||||
std::vector<std::string> texts;
|
||||
for (const int n :
|
||||
{
|
||||
3, 16, 17, 40
|
||||
})
|
||||
{
|
||||
for (const int flags :
|
||||
{
|
||||
0, 1, 2, 3
|
||||
})
|
||||
{
|
||||
texts.push_back(object(n, (flags & 1) != 0, (flags & 2) != 0, 0));
|
||||
}
|
||||
texts.push_back(object(n, true, false, 1)); // other values
|
||||
}
|
||||
// many objects in one comparison (working memory reused across objects)
|
||||
std::string array = "[";
|
||||
std::string array_other = "[";
|
||||
for (std::size_t i = 0; i < texts.size(); ++i)
|
||||
{
|
||||
array += (i != 0 ? "," : "") + texts[i];
|
||||
array_other += (i != 0 ? "," : "") + texts[texts.size() - 1 - i];
|
||||
}
|
||||
texts.push_back(array + "]");
|
||||
texts.push_back(array_other + "]");
|
||||
for (const std::string& x : texts)
|
||||
{
|
||||
for (const std::string& y : texts)
|
||||
{
|
||||
CAPTURE(x)
|
||||
CAPTURE(y)
|
||||
const ordered_json_document dx = ordered_json_document::parse(x);
|
||||
const ordered_json_document dy = ordered_json_document::parse(y);
|
||||
const ordered_json jx = ordered_json::parse(x);
|
||||
const ordered_json jy = ordered_json::parse(y);
|
||||
CHECK((dx.root() == dy.root()) == (jx == jy));
|
||||
CHECK((dx.root() == jy) == (jx == jy));
|
||||
const json_document ux = json_document::parse(x);
|
||||
const json uy = json::parse(y);
|
||||
CHECK((ux.root() == uy) == (json::parse(x) == uy));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
SECTION("numbers, duplicate keys, member order")
|
||||
{
|
||||
const auto same = [](const char* x, const char* y)
|
||||
{
|
||||
const json_document dx = json_document::parse(x);
|
||||
const json_document dy = json_document::parse(y);
|
||||
return dx.root() == dy.root();
|
||||
};
|
||||
CHECK(same("1", "1.0"));
|
||||
CHECK(same("[1, -1, 2.5]", "[1.0, -1.0, 25e-1]"));
|
||||
CHECK(!same("1", "1.5"));
|
||||
CHECK(same("18446744073709551615", "18446744073709551615"));
|
||||
CHECK(same(R"({"a": 1, "a": 2})", R"({"a": 2})"));
|
||||
CHECK(!same(R"({"a": 1, "a": 2})", R"({"a": 1})"));
|
||||
CHECK(same(R"({"a": 1, "b": 2})", R"({"b": 2, "a": 1})"));
|
||||
CHECK(!same(R"({"a": 1})", R"({"a": 1, "b": 2})"));
|
||||
CHECK(!same("[1, 2]", "[2, 1]"));
|
||||
CHECK(!same("\"a\"", "\"b\""));
|
||||
CHECK(same("\"\\u00e9\"", "\"\xc3\xa9\""));
|
||||
CHECK(!same("null", "false"));
|
||||
CHECK(!same("[]", "{}"));
|
||||
const ordered_json_document dup = ordered_json_document::parse(R"({"a": 1, "b": 2, "a": 3})");
|
||||
const ordered_json_document last = ordered_json_document::parse(R"({"a": 3, "b": 2})");
|
||||
CHECK(dup.root() == last.root());
|
||||
// (== compares as parse() resolves duplicates, a lookup finds the first)
|
||||
CHECK(dup.root()["a"].materialize() == 1);
|
||||
CHECK(dup.root()["a"] != last.root()["a"]);
|
||||
const ordered_json_document ab = ordered_json_document::parse(R"({"a": 1, "b": 2})");
|
||||
const ordered_json_document ba = ordered_json_document::parse(R"({"b": 2, "a": 1})");
|
||||
CHECK(ab.root() != ba.root());
|
||||
|
||||
// discarded values compare as basic_json's do
|
||||
const json discarded(json::value_t::discarded);
|
||||
CHECK((json_view() == json_view()) == (discarded == discarded)); // NOLINT(readability-container-size-empty): operator== is tested
|
||||
CHECK((json_view() == discarded) == (discarded == discarded)); // NOLINT(readability-container-size-empty)
|
||||
const json_document null_document = json_document::parse("null");
|
||||
CHECK(!(json_view() == null_document.root())); // NOLINT(readability-container-size-empty)
|
||||
CHECK(!(null_document.root() == discarded));
|
||||
}
|
||||
|
||||
SECTION("values that are the same text, or the same value written differently, at any depth")
|
||||
{
|
||||
// nested arrays and objects around depths where the walk over equal text gives up
|
||||
for (const int depth :
|
||||
{
|
||||
1, 5, 47, 48, 49, 50, 60, 300
|
||||
})
|
||||
{
|
||||
CAPTURE(depth)
|
||||
std::string head;
|
||||
std::string tail;
|
||||
for (int i = 0; i < depth; ++i)
|
||||
{
|
||||
head += i % 2 == 0 ? R"({"k":[1,"s",{"x":true},)" : R"([null,2.5,{"y":)";
|
||||
tail.insert(0, i % 2 == 0 ? "]}" : "}]");
|
||||
}
|
||||
// the same text, one number changed, and one number written differently
|
||||
const auto with_number = [&](const char* number)
|
||||
{
|
||||
std::string result = head;
|
||||
result += number;
|
||||
result += tail;
|
||||
return result;
|
||||
};
|
||||
const std::string text = with_number("7");
|
||||
const std::string changed = with_number("8");
|
||||
const std::string spelled = with_number("7.0");
|
||||
const json_document a = json_document::parse(text);
|
||||
const json_document b = json_document::parse(text);
|
||||
const json_document c = json_document::parse(changed);
|
||||
const json_document d = json_document::parse(spelled);
|
||||
CHECK(a.root() == b.root());
|
||||
CHECK(a.root() != c.root());
|
||||
CHECK(c.root() != a.root());
|
||||
CHECK(a.root() == d.root());
|
||||
CHECK(d.root() == a.root());
|
||||
CHECK(a.root() == json::parse(text));
|
||||
CHECK(a.root() != json::parse(changed));
|
||||
CHECK(json::parse(spelled) == a.root());
|
||||
const nlohmann::json_editable_document e = nlohmann::json_editable_document::parse(text);
|
||||
CHECK(a.root() == e.root());
|
||||
CHECK(e.root() == a.root());
|
||||
CHECK(c.root() != e.root());
|
||||
CHECK(e.root() == e.root());
|
||||
const ordered_json_document oa = ordered_json_document::parse(text);
|
||||
const ordered_json_document oc = ordered_json_document::parse(changed);
|
||||
CHECK(oa.root() != oc.root());
|
||||
CHECK(oa.root() == ordered_json::parse(text));
|
||||
CHECK(oc.root() != ordered_json::parse(text));
|
||||
}
|
||||
|
||||
// not the same text, but the same value
|
||||
const auto same = [](const char* x, const char* y)
|
||||
{
|
||||
const json_document dx = json_document::parse(x);
|
||||
const json_document dy = json_document::parse(y);
|
||||
const bool equal = dx.root() == dy.root();
|
||||
CHECK(equal == (json::parse(x) == json::parse(y)));
|
||||
CHECK(equal == (dx.root() == json::parse(y)));
|
||||
return equal;
|
||||
};
|
||||
CHECK(same(R"({"a":1,"a":2})", R"({"a":3,"a":2})"));
|
||||
CHECK(same(R"({"a":1,"b":[1,{"c":2,"c":3}]})", R"({"b":[1,{"c":9,"c":3}],"a":1})"));
|
||||
CHECK(!same(R"({"a":1,"a":2})", R"({"a":2,"a":3})"));
|
||||
CHECK(same("[1.0,-0,0,1e2]", "[1.00,0,-0,100.0]"));
|
||||
CHECK(same(R"(["\u00e9","\n"])", "[\"\xc3\xa9\",\"\\n\"]"));
|
||||
CHECK(!same(R"({"a":[1,2,{"b":null}]})", R"({"a":[1,2,{"b":false}]})"));
|
||||
CHECK(!same(R"({"a":[1,2,{"b":null}]})", R"({"a":[1,2,{"c":null}]})"));
|
||||
CHECK(!same(R"({"a":[1,2,{"b":null}]})", R"({"a":[1,2,{"b":null,"c":1}]})"));
|
||||
|
||||
// edited documents: moved sequences, links, and values of new nodes
|
||||
nlohmann::json_editable_document edited = nlohmann::json_editable_document::parse(R"({"a":[1,2,3],"b":{"c":"d"},"e":0.5})");
|
||||
const json_document plain = json_document::parse(R"({"a":[1,2,3,4],"b":{"c":"x","y":null},"e":0.5,"z":[]})");
|
||||
edited.push_back(edited.root()["a"], 4);
|
||||
edited.set(edited.root()["b"], "c", "x");
|
||||
edited.set(edited.root()["b"], "y", nullptr);
|
||||
edited.set(edited.root(), "z", json::array());
|
||||
CHECK(edited.root() == plain.root());
|
||||
CHECK(plain.root() == edited.root());
|
||||
edited.erase(edited.root()["a"], 0);
|
||||
CHECK(edited.root() != plain.root());
|
||||
CHECK(edited.root()["a"] == json::parse("[2,3,4]"));
|
||||
const json_document tail = json_document::parse("[2,3,4]");
|
||||
CHECK(edited.root()["a"] == tail.root());
|
||||
}
|
||||
|
||||
SECTION("large documents, with a difference at any place")
|
||||
{
|
||||
const auto make = [](std::size_t count, std::size_t changed, bool swap_members)
|
||||
{
|
||||
std::string text = R"({"b":1,"list":[)";
|
||||
for (std::size_t i = 0; i < count; ++i)
|
||||
{
|
||||
text += (i != 0 ? "," : "");
|
||||
const std::string id = std::to_string(i == changed ? i + 1 : i);
|
||||
if (swap_members && i % 3 == 0)
|
||||
{
|
||||
text += R"({"v":[1.5,"s",{"k":)";
|
||||
text += id;
|
||||
text += R"(}],"id":)";
|
||||
text += id;
|
||||
text += "}";
|
||||
}
|
||||
else
|
||||
{
|
||||
text += R"({"id":)";
|
||||
text += id;
|
||||
text += R"(,"v":[1.5,"s",{"k":)";
|
||||
text += id;
|
||||
text += "}]}";
|
||||
}
|
||||
}
|
||||
return text + R"(],"a":{"y":2,"x":3}})";
|
||||
};
|
||||
const std::size_t count = 3000;
|
||||
for (const std::size_t changed :
|
||||
{
|
||||
count, std::size_t{0}, std::size_t{1}, count / 2, count - 1
|
||||
})
|
||||
{
|
||||
for (const bool swap :
|
||||
{
|
||||
false, true
|
||||
})
|
||||
{
|
||||
CAPTURE(changed)
|
||||
CAPTURE(swap)
|
||||
const std::string text_a = make(count, count, false);
|
||||
const std::string text_b = make(count, changed, swap);
|
||||
const json_document a = json_document::parse(text_a);
|
||||
const json_document b = json_document::parse(text_b);
|
||||
const bool equal = changed == count;
|
||||
CHECK((a.root() == b.root()) == equal);
|
||||
CHECK((b.root() == a.root()) == equal);
|
||||
CHECK((a.root() == json::parse(text_b)) == equal);
|
||||
CHECK((json::parse(text_b) == a.root()) == equal);
|
||||
CHECK((a.root()["list"] == b.root()["list"]) == equal);
|
||||
const ordered_json_document oa = ordered_json_document::parse(text_a);
|
||||
const ordered_json_document ob = ordered_json_document::parse(text_b);
|
||||
CHECK((oa.root() == ob.root()) == (equal && !swap));
|
||||
CHECK((oa.root() == ordered_json::parse(text_b)) == (equal && !swap));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
SECTION("deep nesting")
|
||||
{
|
||||
const std::string deep = std::string(100000, '[') + std::string(100000, ']');
|
||||
const json_document a = json_document::parse(deep);
|
||||
const json_document b = json_document::parse(deep);
|
||||
CHECK(a.root() == b.root());
|
||||
CHECK(a.root() == json::parse(deep));
|
||||
const std::string other = std::string(100000, '[') + "1" + std::string(100000, ']');
|
||||
const json_document c = json_document::parse(other);
|
||||
CHECK(a.root() != c.root());
|
||||
}
|
||||
}
|
||||
@@ -432,101 +432,6 @@ TEST_CASE("json_view dump")
|
||||
}
|
||||
}
|
||||
|
||||
TEST_CASE("json_view comparison")
|
||||
{
|
||||
SECTION("equality of the values parse() produces")
|
||||
{
|
||||
generator g;
|
||||
std::vector<std::string> texts;
|
||||
for (int i = 0; i < 600; ++i)
|
||||
{
|
||||
std::string text;
|
||||
g.value(text, 0);
|
||||
texts.push_back(text);
|
||||
// the same value written differently: sorted keys, canonical numbers
|
||||
texts.push_back(json::parse(text).dump(1));
|
||||
}
|
||||
for (std::size_t i = 0; i + 2 < texts.size(); ++i)
|
||||
{
|
||||
for (std::size_t k = i; k < i + 3; ++k)
|
||||
{
|
||||
CAPTURE(texts[i])
|
||||
CAPTURE(texts[k])
|
||||
const json_document a = json_document::parse(texts[i]);
|
||||
const json_document b = json_document::parse(texts[k]);
|
||||
const json ja = json::parse(texts[i]);
|
||||
const json jb = json::parse(texts[k]);
|
||||
CHECK((a.root() == b.root()) == (ja == jb));
|
||||
CHECK((a.root() != b.root()) == (ja != jb));
|
||||
CHECK((a.root() == jb) == (ja == jb));
|
||||
CHECK((jb == a.root()) == (ja == jb));
|
||||
CHECK((a.root() != jb) == (ja != jb));
|
||||
CHECK((jb != a.root()) == (ja != jb));
|
||||
|
||||
// ordered_json compares members in order
|
||||
const ordered_json_document oa = ordered_json_document::parse(texts[i]);
|
||||
const ordered_json_document ob = ordered_json_document::parse(texts[k]);
|
||||
const ordered_json oja = ordered_json::parse(texts[i]);
|
||||
const ordered_json ojb = ordered_json::parse(texts[k]);
|
||||
CHECK((oa.root() == ob.root()) == (oja == ojb));
|
||||
CHECK((oa.root() == ojb) == (oja == ojb));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
SECTION("numbers, duplicate keys, member order")
|
||||
{
|
||||
const auto same = [](const char* x, const char* y)
|
||||
{
|
||||
const json_document dx = json_document::parse(x);
|
||||
const json_document dy = json_document::parse(y);
|
||||
return dx.root() == dy.root();
|
||||
};
|
||||
CHECK(same("1", "1.0"));
|
||||
CHECK(same("[1, -1, 2.5]", "[1.0, -1.0, 25e-1]"));
|
||||
CHECK(!same("1", "1.5"));
|
||||
CHECK(same("18446744073709551615", "18446744073709551615"));
|
||||
CHECK(same(R"({"a": 1, "a": 2})", R"({"a": 2})"));
|
||||
CHECK(!same(R"({"a": 1, "a": 2})", R"({"a": 1})"));
|
||||
CHECK(same(R"({"a": 1, "b": 2})", R"({"b": 2, "a": 1})"));
|
||||
CHECK(!same(R"({"a": 1})", R"({"a": 1, "b": 2})"));
|
||||
CHECK(!same("[1, 2]", "[2, 1]"));
|
||||
CHECK(!same("\"a\"", "\"b\""));
|
||||
CHECK(same("\"\\u00e9\"", "\"\xc3\xa9\""));
|
||||
CHECK(!same("null", "false"));
|
||||
CHECK(!same("[]", "{}"));
|
||||
const ordered_json_document dup = ordered_json_document::parse(R"({"a": 1, "b": 2, "a": 3})");
|
||||
const ordered_json_document last = ordered_json_document::parse(R"({"a": 3, "b": 2})");
|
||||
CHECK(dup.root() == last.root());
|
||||
// (== compares as parse() resolves duplicates, a lookup finds the first)
|
||||
CHECK(dup.root()["a"].materialize() == 1);
|
||||
CHECK(dup.root()["a"] != last.root()["a"]);
|
||||
const ordered_json_document ab = ordered_json_document::parse(R"({"a": 1, "b": 2})");
|
||||
const ordered_json_document ba = ordered_json_document::parse(R"({"b": 2, "a": 1})");
|
||||
CHECK(ab.root() != ba.root());
|
||||
|
||||
// discarded values compare as basic_json's do
|
||||
const json discarded(json::value_t::discarded);
|
||||
CHECK((json_view() == json_view()) == (discarded == discarded)); // NOLINT(readability-container-size-empty): operator== is tested
|
||||
CHECK((json_view() == discarded) == (discarded == discarded)); // NOLINT(readability-container-size-empty)
|
||||
const json_document null_document = json_document::parse("null");
|
||||
CHECK(!(json_view() == null_document.root())); // NOLINT(readability-container-size-empty)
|
||||
CHECK(!(null_document.root() == discarded));
|
||||
}
|
||||
|
||||
SECTION("deep nesting")
|
||||
{
|
||||
const std::string deep = std::string(100000, '[') + std::string(100000, ']');
|
||||
const json_document a = json_document::parse(deep);
|
||||
const json_document b = json_document::parse(deep);
|
||||
CHECK(a.root() == b.root());
|
||||
CHECK(a.root() == json::parse(deep));
|
||||
const std::string other = std::string(100000, '[') + "1" + std::string(100000, ']');
|
||||
const json_document c = json_document::parse(other);
|
||||
CHECK(a.root() != c.root());
|
||||
}
|
||||
}
|
||||
|
||||
TEST_CASE("json_view large objects")
|
||||
{
|
||||
// objects with 128 members or more are looked up with a hash index
|
||||
|
||||
@@ -941,3 +941,123 @@ TEST_CASE("json_view edits: duplicate keys")
|
||||
CHECK(d.root()["o"]["d"].get<int>() == 0);
|
||||
}
|
||||
}
|
||||
|
||||
#if !defined(JSON_NOEXCEPTION)
|
||||
TEST_CASE("json_view edits: check_utf8 agrees with the byte-wise check")
|
||||
{
|
||||
namespace dv = nlohmann::detail::view;
|
||||
|
||||
// "ok" or the exception message
|
||||
const auto run = [](bool fast, const std::string & s) -> std::string
|
||||
{
|
||||
try
|
||||
{
|
||||
if (fast)
|
||||
{
|
||||
dv::check_utf8(s.data(), s.size());
|
||||
}
|
||||
else
|
||||
{
|
||||
dv::check_utf8_bytewise(reinterpret_cast<const unsigned char*>(s.data()), s.size(), 0);
|
||||
}
|
||||
}
|
||||
catch (const json::type_error& e)
|
||||
{
|
||||
return {e.what()};
|
||||
}
|
||||
return {"ok"};
|
||||
};
|
||||
std::size_t errors = 0;
|
||||
const auto same = [&](const std::string & s)
|
||||
{
|
||||
const std::string a = run(true, s);
|
||||
const std::string b = run(false, s);
|
||||
if (a != b)
|
||||
{
|
||||
INFO("fast: " << a << ", byte-wise: " << b << ", length " << s.size());
|
||||
CHECK(a == b);
|
||||
}
|
||||
errors += b != "ok" ? 1u : 0u;
|
||||
};
|
||||
|
||||
const std::vector<std::string> pieces =
|
||||
{
|
||||
"a", "Z", " ", "\"", "\\", "\n", "\x01", "\x7f", "\xc3\xa4", "\xe4\xb8\xad", "\xf0\x9f\x98\x80",
|
||||
"\x80", "\xbf", "\xc0\x80", "\xc1\xbf", "\xc2", "\xe0\x80\x80", "\xe0\x9f\xbf", "\xed\xa0\x80", "\xed\xbf\xbf",
|
||||
"\xf0\x80\x80\x80", "\xf0\x8f\xbf\xbf", "\xf4\x90\x80\x80", "\xf4\x8f\xbf\xbf", "\xf5", "\xf8", "\xff", "\xfe",
|
||||
"\xe4\xb8", "\xf0\x9f\x98", "\xf0\x9f", "\xf0"
|
||||
};
|
||||
|
||||
// every piece behind prefixes of every length, and followed by more bytes
|
||||
for (std::size_t prefix = 0; prefix <= 64; ++prefix)
|
||||
{
|
||||
for (const auto& piece : pieces)
|
||||
{
|
||||
same(std::string(prefix, 'x') + piece);
|
||||
same(std::string(prefix, 'x') + piece + "yz");
|
||||
same(std::string(prefix, '"') + piece);
|
||||
same(std::string(prefix, '\xc3') + piece);
|
||||
same(std::string(prefix / 2, '\xc3').append(prefix / 2, '\xa4') + piece);
|
||||
same(std::string(prefix, 'x') + "\xe4\xb8\xad" + piece);
|
||||
}
|
||||
}
|
||||
// an invalid byte at every position of valid strings of every length
|
||||
for (std::size_t len = 0; len <= 64; ++len)
|
||||
{
|
||||
const std::string ascii(len, 'a');
|
||||
std::string mixed;
|
||||
while (mixed.size() < len)
|
||||
{
|
||||
if (mixed.size() % 7 == 0)
|
||||
{
|
||||
mixed += "\xc3\xa4";
|
||||
}
|
||||
else if (mixed.size() % 11 == 0)
|
||||
{
|
||||
mixed += "\xf0\x9f\x98\x80";
|
||||
}
|
||||
else
|
||||
{
|
||||
mixed += "a";
|
||||
}
|
||||
}
|
||||
same(ascii);
|
||||
same(mixed);
|
||||
for (std::size_t pos = 0; pos < len; ++pos)
|
||||
{
|
||||
for (const char bad :
|
||||
{'\x80', '\xc0', '\xc2', '\xe0', '\xf4', '\xff', '"', '\\', '\x1f'
|
||||
})
|
||||
{
|
||||
std::string s = ascii;
|
||||
s[pos] = bad;
|
||||
same(s);
|
||||
s = mixed;
|
||||
s[pos] = bad;
|
||||
same(s);
|
||||
}
|
||||
}
|
||||
}
|
||||
// random bytes, biased to the interesting ones
|
||||
std::mt19937 gen(5869); // NOLINT(cert-msc32-c,cert-msc51-cpp,bugprone-random-generator-seed): reproducible
|
||||
static const std::array<unsigned char, 23> interesting = {{0x00, 0x1f, 0x22, 0x5c, 0x7f, 0x80, 0x8f, 0x90, 0x9f, 0xa0, 0xbf, 0xc0, 0xc2, 0xdf, 0xe0, 0xe1, 0xed, 0xef, 0xf0, 0xf1, 0xf4, 0xf5, 0xff}};
|
||||
for (int i = 0; i < 100000; ++i)
|
||||
{
|
||||
std::string s(gen() % 80, 'a');
|
||||
for (auto& c : s)
|
||||
{
|
||||
const unsigned r = gen() % 8;
|
||||
if (r == 0)
|
||||
{
|
||||
c = static_cast<char>(gen() & 0xff);
|
||||
}
|
||||
else if (r == 1)
|
||||
{
|
||||
c = static_cast<char>(interesting[gen() % interesting.size()]);
|
||||
}
|
||||
}
|
||||
same(s);
|
||||
}
|
||||
CHECK(errors > 1000);
|
||||
}
|
||||
#endif
|
||||
@@ -185,8 +185,10 @@ std::uint32_t rng()
|
||||
|
||||
TEST_CASE("json_view images: round trips")
|
||||
{
|
||||
static_assert(json_view_image_test::has_save<json_document>::value && json_view_image_test::has_load<json_document>::value, "save() and load() on a little-endian target");
|
||||
static_assert(json_view_image_test::has_save<ordered_json_editable_document>::value && json_view_image_test::has_load<ordered_json_editable_document>::value, "save() and load() on a little-endian target");
|
||||
static_assert(json_view_image_test::has_save<json_document>::value, "save() on a little-endian target");
|
||||
static_assert(json_view_image_test::has_load<json_document>::value, "load() on a little-endian target");
|
||||
static_assert(json_view_image_test::has_save<ordered_json_editable_document>::value, "save() on a little-endian target");
|
||||
static_assert(json_view_image_test::has_load<ordered_json_editable_document>::value, "load() on a little-endian target");
|
||||
|
||||
SECTION("small documents")
|
||||
{
|
||||
@@ -699,6 +701,64 @@ TEST_CASE("json_view images: ownership")
|
||||
#if !defined(JSON_NOEXCEPTION)
|
||||
TEST_CASE("json_view images: errors")
|
||||
{
|
||||
SECTION("float tokens: a changed byte is accepted if the text is still a number with the digits the node records")
|
||||
{
|
||||
for (const char* const token :
|
||||
{
|
||||
"-12.375", "0.5", "123456.0", "-0.0", "9999999999999999999.5", "0.000000000000000000000001", "1.25e10", "5E-3"
|
||||
})
|
||||
{
|
||||
CAPTURE(token)
|
||||
const std::string text = std::string("[") + token + "]";
|
||||
const json_document d = json_document::parse(text);
|
||||
const std::vector<std::uint8_t> image = d.save();
|
||||
const std::size_t at = text_at(image) + 1; // the first byte of the token
|
||||
const std::uint16_t recorded = node_at(image, 1).extra;
|
||||
CHECK(loaded_dump(image) == json::parse(text).dump());
|
||||
for (std::size_t pos = 0; token[pos] != '\0'; ++pos)
|
||||
{
|
||||
for (unsigned int byte = 0; byte < 256; ++byte)
|
||||
{
|
||||
std::vector<std::uint8_t> changed = image;
|
||||
changed[at + pos] = static_cast<std::uint8_t>(byte);
|
||||
std::string t = token;
|
||||
t[pos] = static_cast<char>(byte);
|
||||
// the digits of the integer part and of the fraction of the changed token
|
||||
std::size_t integer = 0;
|
||||
std::size_t fraction = 0;
|
||||
std::size_t k = (t[0] == '-') ? 1 : 0;
|
||||
for (; k < t.size() && t[k] >= '0' && t[k] <= '9'; ++k)
|
||||
{
|
||||
++integer;
|
||||
}
|
||||
if (k < t.size() && t[k] == '.')
|
||||
{
|
||||
for (++k; k < t.size() && t[k] >= '0' && t[k] <= '9'; ++k)
|
||||
{
|
||||
++fraction;
|
||||
}
|
||||
}
|
||||
// (as a JSON text, the token may have white space around it)
|
||||
const bool float_token = json::accept(t) && t.find_first_of(std::string(" \t\r\n\0", 5)) == std::string::npos && (t.find('.') != std::string::npos || t.find_first_of("eE") != std::string::npos) // NOLINT(abseil-string-find-str-contains)
|
||||
&& ((integer | (fraction << 8U)) == recorded);
|
||||
CAPTURE(pos)
|
||||
CAPTURE(byte)
|
||||
std::string result;
|
||||
try
|
||||
{
|
||||
result = loaded_dump(changed);
|
||||
}
|
||||
catch (const json::parse_error& e)
|
||||
{
|
||||
CHECK(std::string(e.what()) == check_failed);
|
||||
result = "rejected";
|
||||
}
|
||||
CHECK((result != "rejected") == float_token);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
SECTION("invalid UTF-8 of a decoded string: the compact dump writes it, the others throw")
|
||||
{
|
||||
const json_document d = json_document::parse(R"({"k\n":"\u00e9x"})");
|
||||
|
||||
Reference in new issue
Block a user