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Add function for creating hex string literals

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This commit is contained in:
Justine Tunney 2021-08-07 07:05:19 -07:00
parent aeeb851422
commit 1f766a332f
14 changed files with 250 additions and 112 deletions
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12
libc/stdio/appendd.c
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@ -39,15 +39,17 @@
* @param l is byte length of `s`
* @return bytes appended (always `l`) or -1 if `ENOMEM`
* @see appendz(b).i to get buffer length
* @note 20% faster than appends()
*/
ssize_t appendd(char **b, const void *s, size_t l) {
char *p;
size_t n;
struct appendz z;
assert(b);
z = appendz((p = *b));
if (ROUNDUP(z.i + l + 1, 8) + W > z.n) {
n = ROUNDUP(z.i + l + 1, 8) + W;
if (n > z.n) {
if (!z.n) z.n = W * 2;
while (ROUNDUP(z.i + l + 1, 8) + W > z.n) z.n += z.n >> 1;
while (n > z.n) z.n += z.n >> 1;
z.n = ROUNDUP(z.n, W);
if ((p = realloc(p, z.n))) {
z.n = malloc_usable_size(p);
@ -59,9 +61,7 @@ ssize_t appendd(char **b, const void *s, size_t l) {
}
*(char *)mempcpy(p + z.i, s, l) = 0;
z.i += l;
if (!IsTiny() && W == 8) {
z.i |= (size_t)APPEND_COOKIE << 48;
}
if (!IsTiny() && W == 8) z.i |= (size_t)APPEND_COOKIE << 48;
*(size_t *)(p + z.n - W) = z.i;
return l;
}