admin/mruby-mruby
1
0
Fork 0
mirror of https://github.com/mruby/mruby synced 2026-06-08 16:11:16 +00:00
Code Issues Packages Projects Releases Wiki Activity

string.c (mrb_memsearch_ss): support bigendians

Browse Source
This commit is contained in:
Yukihiro "Matz" Matsumoto
2024-01-27 06:23:16 +09:00
parent 06d9a54760
commit dee1ded7b5
1 changed files with 15 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/string.c
+15 -1
View File
@@ -572,6 +572,7 @@ str_index_str_by_char(mrb_state *mrb, mrb_value str, mrb_value sub, mrb_int pos)
* takes unsigned char*
* returns mrb_int
* alignment adjustment added
* support bigendian CPU
*/
static inline mrb_int
mrb_memsearch_ss(const unsigned char *xs, long m, const unsigned char *ys, long n)
@@ -587,6 +588,15 @@ mrb_memsearch_ss(const unsigned char *xs, long m, const unsigned char *ys, long
#define MASK2 0x7f7f7f7flu
#define MASK3 0x80808080lu
#endif
#if defined(MRB_ENDIAN_BIG)
#ifdef MRB_64BIT
#define MASK4 0x8000000000000000llu
#else
#define MASK4 0x80000000
#endif
#else
#define MASK4 0x80
#endif
#if ALIGNED_WORD_ACCESS
if ((uintptr_t)ys % sizeof(bitint)) {
@@ -611,14 +621,18 @@ mrb_memsearch_ss(const unsigned char *xs, long m, const unsigned char *ys, long
size_t j = 0;
while (zeros) {
if (zeros & 0x80) {
if (zeros & MASK4) {
const char* substr = (char*)s0 + j + 1;
if (memcmp(substr, xs + 1, m - 2) == 0) {
return i + j;
}
}
#if defined(MRB_ENDIAN_BIG)
zeros <<= 8;
#else
zeros >>= 8;
#endif
j += 1;
}
}