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91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
/*
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https://raw.githubusercontent.com/littlstar/asprintf.c/20ce5207a4ecb24017b5a17e6cd7d006e3047146/asprintf.c
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The MIT License (MIT)
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Copyright (c) 2014 Little Star Media, Inc.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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/**
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* `asprintf.c' - asprintf
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*
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* copyright (c) 2014 joseph werle <joseph.werle@gmail.com>
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*/
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#ifndef HAVE_ASPRINTF
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include "asprintf.h"
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int
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asprintf (char **str, const char *fmt, ...) {
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int size = 0;
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va_list args;
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// init variadic argumens
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va_start(args, fmt);
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// format and get size
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size = vasprintf(str, fmt, args);
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// toss args
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va_end(args);
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return size;
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}
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int
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vasprintf (char **str, const char *fmt, va_list args) {
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int size = 0;
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va_list tmpa;
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// copy
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va_copy(tmpa, args);
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// apply variadic arguments to
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// sprintf with format to get size
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size = vsnprintf(NULL, size, fmt, tmpa);
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// toss args
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va_end(tmpa);
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// return -1 to be compliant if
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// size is less than 0
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if (size < 0) { return -1; }
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// alloc with size plus 1 for `\0'
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*str = (char *) malloc(size + 1);
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// return -1 to be compliant
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// if pointer is `NULL'
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if (NULL == *str) { return -1; }
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// format string with original
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// variadic arguments and set new size
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size = vsprintf(*str, fmt, args);
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return size;
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}
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#endif
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