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Improve performance of printf functions

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This commit is contained in:
Justine Tunney 2021-04-24 13:58:34 -07:00
parent b107d2709f
commit dc6d11a031
39 changed files with 577 additions and 650 deletions
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16
libc/mem/vasprintf.c
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@ -29,26 +29,26 @@
* @see xasprintf() for a better API
*/
int(vasprintf)(char **strp, const char *fmt, va_list va) {
int wrote;
char *p;
size_t size;
va_list va2;
va_list vb;
int wrote, rc = -1;
if ((*strp = malloc((size = 512)))) {
va_copy(va2, va);
va_copy(vb, va);
wrote = (vsnprintf)(*strp, size, fmt, va);
if (wrote == -1) return -1;
if (wrote < size) {
if ((p = realloc(*strp, wrote + 1))) *strp = p;
return wrote;
rc = wrote;
} else {
size = wrote + 1;
if ((p = realloc(*strp, size))) {
*strp = p;
wrote = (vsnprintf)(*strp, size, fmt, va2);
wrote = (vsnprintf)(*strp, size, fmt, vb);
assert(wrote == size - 1);
return wrote;
rc = wrote;
}
}
va_end(vb);
}
return -1;
return rc;
}