105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
/*
|
|
* Copyright (c) 2000-2001 Proofpoint, Inc. and its suppliers.
|
|
* All rights reserved.
|
|
*
|
|
* By using this file, you agree to the terms and conditions set
|
|
* forth in the LICENSE file which can be found at the top level of
|
|
* the sendmail distribution.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND TODD C. MILLER DISCLAIMS ALL
|
|
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER BE LIABLE
|
|
* FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
|
|
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
|
|
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include <sm/gen.h>
|
|
SM_RCSID("@(#)$Id: vasprintf.c,v 1.28 2013-11-22 20:51:44 ca Exp $")
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <sm/io.h>
|
|
#include <sm/heap.h>
|
|
#include "local.h"
|
|
|
|
/*
|
|
** SM_VASPRINTF -- printf to a dynamically allocated string
|
|
**
|
|
** Write 'printf' output to a dynamically allocated string
|
|
** buffer which is returned to the caller.
|
|
**
|
|
** Parameters:
|
|
** str -- *str receives a pointer to the allocated string
|
|
** fmt -- format directives for printing
|
|
** ap -- variable argument list
|
|
**
|
|
** Results:
|
|
** On failure, set *str to NULL, set errno, and return -1.
|
|
**
|
|
** On success, set *str to a pointer to a nul-terminated
|
|
** string buffer containing printf output, and return the
|
|
** length of the string (not counting the nul).
|
|
*/
|
|
|
|
#define SM_VA_BUFSIZE 128
|
|
|
|
int
|
|
sm_vasprintf(str, fmt, ap)
|
|
char **str;
|
|
const char *fmt;
|
|
SM_VA_LOCAL_DECL
|
|
{
|
|
int ret;
|
|
SM_FILE_T fake;
|
|
unsigned char *base;
|
|
|
|
fake.sm_magic = SmFileMagic;
|
|
fake.f_timeout = SM_TIME_FOREVER;
|
|
fake.f_timeoutstate = SM_TIME_BLOCK;
|
|
fake.f_file = -1;
|
|
fake.f_flags = SMWR | SMSTR | SMALC;
|
|
fake.f_bf.smb_base = fake.f_p = (unsigned char *)sm_malloc(SM_VA_BUFSIZE);
|
|
if (fake.f_bf.smb_base == NULL)
|
|
goto err2;
|
|
fake.f_close = NULL;
|
|
fake.f_open = NULL;
|
|
fake.f_read = NULL;
|
|
fake.f_write = NULL;
|
|
fake.f_seek = NULL;
|
|
fake.f_setinfo = fake.f_getinfo = NULL;
|
|
fake.f_type = "sm_vasprintf:fake";
|
|
fake.f_bf.smb_size = fake.f_w = SM_VA_BUFSIZE - 1;
|
|
fake.f_timeout = SM_TIME_FOREVER;
|
|
ret = sm_io_vfprintf(&fake, SM_TIME_FOREVER, fmt, ap);
|
|
if (ret == -1)
|
|
goto err;
|
|
*fake.f_p = '\0';
|
|
|
|
/* use no more space than necessary */
|
|
base = (unsigned char *) sm_realloc(fake.f_bf.smb_base, ret + 1);
|
|
if (base == NULL)
|
|
goto err;
|
|
*str = (char *)base;
|
|
return ret;
|
|
|
|
err:
|
|
if (fake.f_bf.smb_base != NULL)
|
|
{
|
|
sm_free(fake.f_bf.smb_base);
|
|
fake.f_bf.smb_base = NULL;
|
|
}
|
|
err2:
|
|
*str = NULL;
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|