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ce51cf0392
Added $Id$'s to files that were lacking them (gpalmer), made some cosmetic changes to conform to style guidelines (bde) and checked against NetBSD and Lite2 to remove unnecessary divergences (hsu, bde) One last code cleanup:- Removed spurious casts in fseek.c and stdio.c. Added missing function argument in fwalk.c. Added missing header include in flags.c and rget.c. Put in casts where int's were being passed as size_t's. Put in missing prototypes for static functions. Changed second args of __sflags() inflags.c and writehook() in vasprintf.c from char * to const char * to conform to prototypes. This directory now compiles with no warnings with -Wall under gcc-2.6.3 and with considerably less warnings than before with the ultra-pedantic script I used for testing. (Most of the remaining ones are due to const poisoning).
110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
/*-
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* Copyright (c) 1996 Peter Wemm <peter@freebsd.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_RCS) && !defined(lint)
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static char rcsid[] = "$Id: vasprintf.c,v 1.1 1996/05/27 10:49:43 peter Exp $";
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#endif /* LIBC_RCS and not lint */
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#include <stdio.h>
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#include <stdlib.h>
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#if __STDC__
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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#define CHUNK_SPARE 128 /* how much spare to allocate to avoid realloc calls */
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struct bufcookie {
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char *base; /* start of buffer */
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int size;
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int left;
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};
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static int writehook __P((void *cookie, const char *, int));
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static int
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writehook(cookie, buf, len)
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void *cookie;
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const char *buf;
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int len;
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{
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struct bufcookie *h = (struct bufcookie *)cookie;
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if (len == 0)
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return 0;
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if (len > h->left) {
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/* grow malloc region */
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h->left = h->left + len + CHUNK_SPARE;
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h->size = h->size + len + CHUNK_SPARE;
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h->base = realloc(h->base, (size_t)h->size);
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if (h->base == NULL)
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return (-1);
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}
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/* "write" it */
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(void)memcpy(h->base + h->size - h->left, buf, (size_t)len);
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h->left -= len;
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return (0);
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}
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int
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vasprintf(str, fmt, ap)
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char **str;
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const char *fmt;
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va_list ap;
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{
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int ret;
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FILE *f;
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struct bufcookie h;
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h.base = malloc(CHUNK_SPARE);
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if (h.base == NULL)
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return (-1);
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h.size = CHUNK_SPARE;
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h.left = CHUNK_SPARE;
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f = funopen(&h, NULL, writehook, NULL, NULL);
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if (f == NULL) {
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free(h.base);
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return (-1);
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}
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ret = vfprintf(f, fmt, ap);
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fclose(f);
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if (ret < 0) {
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free(h.base);
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return (-1);
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}
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if (h.base == NULL) /* failed to realloc in writehook */
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return (-1);
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h.base[h.size - h.left] = '\0';
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*str = realloc(h.base, (size_t)(h.size - h.left + 1));
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if (*str == NULL) /* failed to realloc it to actual size */
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return -1;
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return (ret);
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}
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