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memmem.c and strstr.c: do not require -std=c99

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This commit is contained in:
Giacomo Tesio 2019-08-13 02:00:07 +02:00 committed by Ken Brown
parent a577c601e7
commit 8d81fcc18e
2 changed files with 10 additions and 5 deletions
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3
newlib/libc/string/memmem.c
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@ -143,10 +143,11 @@ memmem (const void *haystack, size_t hs_len, const void *needle, size_t ne_len)
size_t tmp, shift1; size_t tmp, shift1;
size_t m1 = ne_len - 1; size_t m1 = ne_len - 1;
size_t offset = 0; size_t offset = 0;
int i;
/* Initialize bad character shift hash table. */ /* Initialize bad character shift hash table. */
memset (shift, 0, sizeof (shift)); memset (shift, 0, sizeof (shift));
for (int i = 1; i < m1; i++) for (i = 1; i < m1; i++)
shift[hash2 (ne + i)] = i; shift[hash2 (ne + i)] = i;
shift1 = m1 - shift[hash2 (ne + m1)]; shift1 = m1 - shift[hash2 (ne + m1)];
shift[hash2 (ne + m1)] = m1; shift[hash2 (ne + m1)] = m1;

12
newlib/libc/string/strstr.c
View File

@ -102,7 +102,8 @@ strstr2 (const unsigned char *hs, const unsigned char *ne)
{ {
uint32_t h1 = (ne[0] << 16) | ne[1]; uint32_t h1 = (ne[0] << 16) | ne[1];
uint32_t h2 = 0; uint32_t h2 = 0;
for (int c = hs[0]; h1 != h2 && c != 0; c = *++hs) int c;
for (c = hs[0]; h1 != h2 && c != 0; c = *++hs)
h2 = (h2 << 16) | c; h2 = (h2 << 16) | c;
return h1 == h2 ? (char *)hs - 2 : NULL; return h1 == h2 ? (char *)hs - 2 : NULL;
} }
@ -112,7 +113,8 @@ strstr3 (const unsigned char *hs, const unsigned char *ne)
{ {
uint32_t h1 = (ne[0] << 24) | (ne[1] << 16) | (ne[2] << 8); uint32_t h1 = (ne[0] << 24) | (ne[1] << 16) | (ne[2] << 8);
uint32_t h2 = 0; uint32_t h2 = 0;
for (int c = hs[0]; h1 != h2 && c != 0; c = *++hs) int c;
for (c = hs[0]; h1 != h2 && c != 0; c = *++hs)
h2 = (h2 | c) << 8; h2 = (h2 | c) << 8;
return h1 == h2 ? (char *)hs - 3 : NULL; return h1 == h2 ? (char *)hs - 3 : NULL;
} }
@ -122,7 +124,8 @@ strstr4 (const unsigned char *hs, const unsigned char *ne)
{ {
uint32_t h1 = (ne[0] << 24) | (ne[1] << 16) | (ne[2] << 8) | ne[3]; uint32_t h1 = (ne[0] << 24) | (ne[1] << 16) | (ne[2] << 8) | ne[3];
uint32_t h2 = 0; uint32_t h2 = 0;
for (int c = hs[0]; c != 0 && h1 != h2; c = *++hs) int c;
for (c = hs[0]; c != 0 && h1 != h2; c = *++hs)
h2 = (h2 << 8) | c; h2 = (h2 << 8) | c;
return h1 == h2 ? (char *)hs - 4 : NULL; return h1 == h2 ? (char *)hs - 4 : NULL;
} }
@ -142,6 +145,7 @@ strstr (const char *haystack, const char *needle)
{ {
const unsigned char *hs = (const unsigned char *) haystack; const unsigned char *hs = (const unsigned char *) haystack;
const unsigned char *ne = (const unsigned char *) needle; const unsigned char *ne = (const unsigned char *) needle;
int i;
/* Handle short needle special cases first. */ /* Handle short needle special cases first. */
if (ne[0] == '\0') if (ne[0] == '\0')
@ -170,7 +174,7 @@ strstr (const char *haystack, const char *needle)
/* Initialize bad character shift hash table. */ /* Initialize bad character shift hash table. */
memset (shift, ne_len + 1, sizeof (shift)); memset (shift, ne_len + 1, sizeof (shift));
for (int i = 0; i < ne_len; i++) for (i = 0; i < ne_len; i++)
shift[ne[i] % sizeof (shift)] = ne_len - i; shift[ne[i] % sizeof (shift)] = ne_len - i;
do do