| 1 | /* $NetBSD: vasprintf.c,v 1.10 2005/02/09 21:35:47 kleink Exp $ */
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| 2 |
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| 3 | /*
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| 4 | * Copyright (c) 1997 Todd C. Miller <[email protected]>
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| 5 | * All rights reserved.
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| 6 | *
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| 7 | * Redistribution and use in source and binary forms, with or without
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| 8 | * modification, are permitted provided that the following conditions
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| 9 | * are met:
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| 10 | * 1. Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * 2. Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | * 3. The name of the author may not be used to endorse or promote products
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| 16 | * derived from this software without specific prior written permission.
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| 17 | *
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| 18 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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| 19 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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| 20 | * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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| 21 | * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 22 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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| 23 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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| 24 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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| 25 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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| 26 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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| 27 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 28 | */
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| 29 | #include <LibConfig.h>
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| 30 | #include <sys/EfiCdefs.h>
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| 31 | #if defined(LIBC_SCCS) && !defined(lint)
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| 32 | __RCSID("$NetBSD: vasprintf.c,v 1.10 2005/02/09 21:35:47 kleink Exp $");
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| 33 | #endif /* LIBC_SCCS and not lint */
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| 34 |
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| 35 | #include <assert.h>
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| 36 | #include <errno.h>
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| 37 | #include <stdio.h>
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| 38 | #include <stdlib.h>
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| 39 | #include "reentrant.h"
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| 40 | #include "local.h"
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| 41 |
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| 42 | int
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| 43 | vasprintf(str, fmt, ap)
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| 44 | char **str;
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| 45 | const char *fmt;
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| 46 | _BSD_VA_LIST_ ap;
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| 47 | {
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| 48 | int ret;
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| 49 | FILE f;
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| 50 | struct __sfileext fext;
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| 51 | unsigned char *_base;
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| 52 |
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| 53 | _DIAGASSERT(str != NULL);
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| 54 | _DIAGASSERT(fmt != NULL);
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| 55 |
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| 56 | _FILEEXT_SETUP(&f, &fext);
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| 57 | f._file = -1;
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| 58 | f._flags = __SWR | __SSTR | __SALC;
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| 59 | f._bf._base = f._p = (unsigned char *)malloc(128);
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| 60 | if (f._bf._base == NULL)
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| 61 | goto err;
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| 62 | f._bf._size = f._w = 127; /* Leave room for the NUL */
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| 63 | ret = __vfprintf_unlocked(&f, fmt, ap);
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| 64 | if (ret == -1)
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| 65 | goto err;
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| 66 | *f._p = '\0';
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| 67 | _base = realloc(f._bf._base, (size_t)(ret + 1));
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| 68 | if (_base == NULL)
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| 69 | goto err;
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| 70 | *str = (char *)_base;
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| 71 | return (ret);
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| 72 |
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| 73 | err:
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| 74 | if (f._bf._base)
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| 75 | free(f._bf._base);
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| 76 | *str = NULL;
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| 77 | errno = ENOMEM;
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| 78 | return (-1);
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| 79 | }
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