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author | Junio C Hamano <gitster@pobox.com> | 2007-09-10 07:14:50 (GMT) |
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committer | Junio C Hamano <gitster@pobox.com> | 2007-09-10 07:14:50 (GMT) |
commit | 6972ab7ae10a205bbc05b98408a36403915a9c39 (patch) | |
tree | 755ab51db764a7d35e9546eb30a5d4440291b014 /compat/memmem.c | |
parent | 9784c5c53e0765bc9a0c973ab10aaf0734d535c3 (diff) | |
parent | 20fbfd869fe8faae0ce4573b60b540024db7385d (diff) | |
download | git-6972ab7ae10a205bbc05b98408a36403915a9c39.zip git-6972ab7ae10a205bbc05b98408a36403915a9c39.tar.gz git-6972ab7ae10a205bbc05b98408a36403915a9c39.tar.bz2 |
Merge branch 'rs/archive'
* rs/archive:
archive - leakfix for format_subst()
Define NO_MEMMEM on Darwin as it lacks the function
archive: rename attribute specfile to export-subst
archive: specfile syntax change: "$Format:%PLCHLDR$" instead of just "%PLCHLDR" (take 2)
add memmem()
Remove unused function convert_sha1_file()
archive: specfile support (--pretty=format: in archive files)
Export format_commit_message()
Diffstat (limited to 'compat/memmem.c')
-rw-r--r-- | compat/memmem.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/compat/memmem.c b/compat/memmem.c new file mode 100644 index 0000000..cd0d877 --- /dev/null +++ b/compat/memmem.c @@ -0,0 +1,29 @@ +#include "../git-compat-util.h" + +void *gitmemmem(const void *haystack, size_t haystack_len, + const void *needle, size_t needle_len) +{ + const char *begin = haystack; + const char *last_possible = begin + haystack_len - needle_len; + + /* + * The first occurrence of the empty string is deemed to occur at + * the beginning of the string. + */ + if (needle_len == 0) + return (void *)begin; + + /* + * Sanity check, otherwise the loop might search through the whole + * memory. + */ + if (haystack_len < needle_len) + return NULL; + + for (; begin <= last_possible; begin++) { + if (!memcmp(begin, needle, needle_len)) + return (void *)begin; + } + + return NULL; +} |