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/*
* The MIT License (MIT)
*
* Copyright © 2017 Franklin "Snaipe" Mathieu <http://snai.pe/>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <limits.h>
#include "fmt.h"
int cri_fmt_bprintf(char **buf, size_t *offset, size_t *sz,
const char *fmt, ...)
{
va_list vl;
va_start(vl, fmt);
int rc = cri_fmt_vbprintf(buf, offset, sz, fmt, vl);
va_end(vl);
return rc;
}
int cri_fmt_vbprintf(char **buf, size_t *offset, size_t *sz,
const char *fmt, va_list ap)
{
va_list vl;
size_t offset_start = 0;
if (!offset)
offset = &offset_start;
va_copy(vl, ap);
#ifdef _WIN32
int size = _vscprintf(fmt, vl);
#else
int size = vsnprintf(0, 0, fmt, vl);
#endif
va_end(vl);
if (size < 0) {
return -errno;
}
size_t nsz = *sz + size;
char *nb = realloc(*buf, nsz + 1);
if (!nb) {
return -errno;
}
*buf = nb;
vsnprintf(&nb[*offset], size + 1, fmt, ap);
*offset += size;
*sz = nsz;
return 0;
}
int cr_asprintf(char **strp, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int res = cr_vasprintf(strp, fmt, ap);
va_end(ap);
return res;
}
int cr_vasprintf(char **strp, const char *fmt, va_list ap)
{
size_t size = 0;
char *out = NULL;
int rc = cri_fmt_vbprintf(&out, NULL, &size, fmt, ap);
if (rc < 0)
return rc;
if (size > (size_t) INT_MAX)
return -EOVERFLOW;
*strp = out;
return size;
}
void cr_asprintf_free(char *buf)
{
free(buf);
}
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