99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
/*
|
|
* Copyright (c) 1995-2013 Peter Simons <simons@cryp.to>
|
|
* Copyright (c) 2000-2001 Cable & Wireless GmbH
|
|
* Copyright (c) 1999-2000 CyberSolutions GmbH
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify it under
|
|
* the terms of the GNU General Public License as published by the Free Software
|
|
* Foundation, either version 3 of the License, or (at your option) any later
|
|
* version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
|
|
* details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <stdarg.h>
|
|
#include <string.h>
|
|
#include "text.h"
|
|
|
|
#if !defined(HAVE_VSNPRINTF) && defined(HAVE___VSNPRINTF)
|
|
# define vsnprintf __vsnprintf
|
|
#endif
|
|
|
|
/* Use sprintf() without worrying about buffer size.
|
|
|
|
One problem when dealing a lot with texts and strings is the buffer
|
|
handling. Usually a programmer will frequently have to format
|
|
several strings into a new one using sprintf(3), without knowing
|
|
how long the resulting string will become.
|
|
|
|
text_easy_sprintf() will solve this problem. The syntax is very much
|
|
like sprintf(), except for that the target buffer is allocated by
|
|
the routine and returned to the caller.
|
|
|
|
RETURNS: A buffer holding the formatted string or NULL if the
|
|
memory allocation failed.
|
|
|
|
NOTE: The returned buffer has been allocated with malloc(3) and
|
|
should be freed when not needed anymore.
|
|
|
|
AUTHOR: Peter Simons <simons@rhein.de>
|
|
|
|
*/
|
|
|
|
char *
|
|
text_easy_sprintf(const char * fmt /* Format string in printf(3) syntax. */,
|
|
... /* Parameter list. */)
|
|
{
|
|
char * buffer,
|
|
* result;
|
|
size_t buffer_size;
|
|
va_list ap;
|
|
int rc;
|
|
|
|
/* Sanity checks. */
|
|
|
|
assert(fmt != NULL);
|
|
if (fmt == NULL)
|
|
return NULL;
|
|
|
|
/* Do the work. */
|
|
|
|
va_start(ap, fmt);
|
|
for (buffer_size = 0, result = NULL; TRUE; free(buffer)) { /* forever */
|
|
|
|
/* Allocate the internal buffer. */
|
|
|
|
buffer_size += 8 * 1024;
|
|
buffer = malloc(buffer_size);
|
|
if (buffer == NULL)
|
|
goto leave;
|
|
|
|
/* Format the string into it. */
|
|
|
|
rc = vsnprintf(buffer, buffer_size, fmt, ap);
|
|
|
|
/* Success? */
|
|
|
|
if (rc < buffer_size) {
|
|
/* Yes. */
|
|
|
|
result = strdup(buffer);
|
|
free(buffer);
|
|
goto leave;
|
|
}
|
|
|
|
/* No. */
|
|
}
|
|
|
|
leave:
|
|
va_end(ap);
|
|
return result;
|
|
}
|