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Niels Lohmann
4155e2938f
* Write json_view's dump() without a call or conversion per token The default dump() (no indentation, no ensure_ascii) gets its own writer that makes the same walk and produces the same output: - the write position stays in a local variable instead of a member, so the compiler keeps it in a register across stores through aliasing char pointers; - strings and number tokens are copied with fixed-size 32-byte moves wherever enough source bytes remain, instead of one memcpy call per token; - the innermost open container lives in local variables; a stack that starts as a local array of 32 entries holds the rest; - unedited documents are walked through the node array in order, and integer tokens are read from the source directly. On top of that, float tokens of at most 15 significant digits are written straight from their digits via zmij::to_shortest() and write_shortest(), without converting to a double and back: such decimals are farther apart than a double's rounding interval, so the token's digits are the double's shortest digits. Tokens of 16+ digits, or edited values, still go through decimal_to_float(). The view's own NEON write_decimal() is removed in favor of the shared writer, and the dump output now grows in 64 KiB steps instead of being resized to its estimate at once. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Fix MSVC C4127 and Infer finding in the view serializer Test the template options through enabled() so that conditions combined with them are not constant, and mark the nav::value() null dereference as a false positive like materialize.hpp does. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Fix out-of-bounds read when dumping a float token of an unchecked image A float node of an image loaded with image_check::bounds can hold a token whose bytes are not digits, so its value need not have the digit count recorded in the node. write_double_at() passed that count to write_short_decimal(), which indexes its table of powers of ten by it: an assertion failure in debug builds, an out-of-bounds read in release builds. Use the counted overload only if the value has exactly that many digits, otherwise count them. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Tidy the view serializer: doxygen block placement, enabled() for a constant Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Use a named document in the dump test: root() of a temporary does not compile Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Test write_short_decimal and powers_of_ten_16 against to_chars Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Fix clang-tidy 22 findings in unit-to_chars.cpp Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Write doubles from their bits only where double is IEEE 754 binary64 Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Split the value and pointer edit tests off unit-json_view_edit.cpp The MinGW linker of the Windows clang jobs cannot link object files with more than 32767 sections ("relocation truncated to fit: IMAGE_REL_AMD64_REL32 against `.rdata'"). unit-json_view_edit.cpp has 35409 sections since the fast dump instantiates more code for editable documents, so its test cases "views and values", "deeply nested values", "pointers below a null value", and "strings of other documents are checked" move into unit-json_view_edit_values.cpp. The helper exception_of_call() that both files use moves into json_view_test_helpers.hpp. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Move the dump tests of this branch to unit-json_view_dump.cpp The dump and comparison tests moved to their own file in the dump pull request; the tests of the fast dump() join them there. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Regenerate the amalgamated headers Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Address review: one powers-of-ten table, literal sizes from the type - dtoa_impl::powers_of_ten() (10^0 to 10^19, one entry per line) replaces powers_of_ten_16() and the table of int_pow10() - put_literal() takes the length of a string literal from its type - small_stack holds the heap vector by reference - the growth step of the output buffer is written in hex Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Explain why the growth of the dump's stack is static Signed-off-by: Niels Lohmann <mail@nlohmann.me> * Regenerate the amalgamated headers Signed-off-by: Niels Lohmann <mail@nlohmann.me> --------- Signed-off-by: Niels Lohmann <mail@nlohmann.me>