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path: root/shared/libc/string0.c
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2023-11-07shared/libc/string0: Don't deref args for n==0 case.Jim Mussared
C99 says that strncmp has UB for either string being NULL, so the current behavior is technically correct, but it's an easy fix to handle this case correctly. 7.1.4: "unless explicitly stated otherwise in the detailed description... if an argument to a function has ...null pointer.. the behavior is undefined". 7.21.1: "Unless explicitly stated otherwise in the description of a particular function in this subclause, pointer arguments on such a call shall still have valid values, as described in 7.1.4". Also make the same change for the minimal version in bare-arm/lib.c. This work was funded through GitHub Sponsors. Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
2021-11-17shared/libc/string0: Don't include string.h, and provide __memcpy_chk.Alexey 'alexxy' Shvetsov
Some toolchains will have string.h defining various macros which can lead to compile errors for string function implementations. Not including string.h fixes this. An implementation of __memcpy_chk is provided for toolchains that enable _FORTIFY_SOURCE. Fixes issue #6046. Signed-off-by: Alexey 'alexxy' Shvetsov <alexxyum@gmail.com>
2021-07-12shared: Introduce new top-level dir and move 1st party lib code there.Damien George
This commit moves all first-party code developed for this project from lib/ to shared/, so that lib/ now only contains third-party code. The following directories are moved as-is from lib to shared: lib/libc -> shared/libc lib/memzip -> shared/memzip lib/netutils -> shared/netutils lib/timeutils -> shared/timeutils lib/upytesthelper -> shared/upytesthelper All files in lib/embed/ have been moved to shared/libc/. lib/mp-readline has been moved to shared/readline. lib/utils has been moved to shared/runtime, with the exception of lib/utils/printf.c which has been moved to shared/libc/printf.c. Signed-off-by: Damien George <damien@micropython.org>