/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "cx/printf.h"
#include <stdio.h>
#include <string.h>
#ifndef CX_PRINTF_SBO_SIZE
#define CX_PRINTF_SBO_SIZE 512
#endif
int cx_fprintf(
void *stream,
cx_write_func wfc,
char const *fmt,
...
) {
int ret;
va_list ap;
va_start(ap, fmt);
ret = cx_vfprintf(stream, wfc, fmt, ap);
va_end(ap);
return ret;
}
int cx_vfprintf(
void *stream,
cx_write_func wfc,
char const *fmt,
va_list ap
) {
char buf[CX_PRINTF_SBO_SIZE];
va_list ap2;
va_copy(ap2, ap);
int ret = vsnprintf(buf, CX_PRINTF_SBO_SIZE, fmt, ap);
if (ret < 0) {
return ret;
} else if (ret < CX_PRINTF_SBO_SIZE) {
return (int) wfc(buf, 1, ret, stream);
} else {
int len = ret + 1;
char *newbuf = malloc(len);
if (!newbuf) {
return -1;
}
ret = vsnprintf(newbuf, len, fmt, ap2);
if (ret > 0) {
ret = (int) wfc(newbuf, 1, ret, stream);
}
free(newbuf);
}
return ret;
}
cxmutstr cx_asprintf_a(
CxAllocator const *allocator,
char const *fmt,
...
) {
va_list ap;
cxmutstr ret;
va_start(ap, fmt);
ret = cx_vasprintf_a(allocator, fmt, ap);
va_end(ap);
return ret;
}
cxmutstr cx_vasprintf_a(
CxAllocator const *a,
char const *fmt,
va_list ap
) {
cxmutstr s;
s.ptr = NULL;
s.length = 0;
char buf[CX_PRINTF_SBO_SIZE];
va_list ap2;
va_copy(ap2, ap);
int ret = vsnprintf(buf, CX_PRINTF_SBO_SIZE, fmt, ap);
if (ret > 0 && ret < CX_PRINTF_SBO_SIZE) {
s.ptr = cxMalloc(a, ret + 1);
if (s.ptr) {
s.length = (size_t) ret;
memcpy(s.ptr, buf, ret);
s.ptr[s.length] = '\0';
}
} else {
int len = ret + 1;
s.ptr = cxMalloc(a, len);
if (s.ptr) {
ret = vsnprintf(s.ptr, len, fmt, ap2);
if (ret < 0) {
free(s.ptr);
s.ptr = NULL;
} else {
s.length = (size_t) ret;
}
}
}
return s;
}