mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-07-04 18:28:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Fold LIBC_ALG into LIBC_MEM

Browse source
This commit is contained in:
Justine Tunney 2022-08-13 08:32:34 -07:00
parent 7cf66bc161
commit 17aea99bb3
162 changed files with 265 additions and 430 deletions
Download patch file Download diff file Expand all files Collapse all files

64
libc/mem/replacestr.c Normal file
View file

@ -0,0 +1,64 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/mem/alg.h"
#include "libc/mem/arraylist2.internal.h"
#include "libc/intrin/safemacros.internal.h"
#include "libc/macros.internal.h"
#include "libc/str/str.h"
#include "libc/sysv/errfuns.h"
/**
* Replaces all instances of NEEDLE in S with REPLACEMENT.
*
* @param needle can't be empty
* @return newly allocated memory that must be free()'d or NULL w/ errno
* @error ENOMEM, EINVAL
*/
char *replacestr(const char *s, const char *needle, const char *replacement) {
char *p1, *p2, *res_p;
size_t left, nlen, rlen, res_i, res_n;
if (*needle) {
p1 = s;
left = strlen(s);
nlen = strlen(needle);
rlen = strlen(replacement);
res_i = 0;
res_n = MAX(left, 32);
if ((res_p = malloc(res_n * sizeof(char)))) {
do {
if (!(p2 = memmem(p1, left, needle, nlen))) break;
if (CONCAT(&res_p, &res_i, &res_n, p1, p2 - p1) == -1 ||
CONCAT(&res_p, &res_i, &res_n, replacement, rlen) == -1) {
goto oom;
}
p2 += nlen;
left -= p2 - p1;
p1 = p2;
} while (left);
if (CONCAT(&res_p, &res_i, &res_n, p1, left + 1) != -1) {
return res_p;
}
}
oom:
free(res_p);
} else {
einval();
}
return NULL;
}