Petr Machata | 2ae374a | 2012-12-08 05:08:48 +0100 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of ltrace. |
| 3 | * Copyright (C) 2012 Petr Machata, Red Hat Inc. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
| 7 | * published by the Free Software Foundation; either version 2 of the |
| 8 | * License, or (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA |
| 18 | * 02110-1301 USA |
| 19 | */ |
| 20 | |
Petr Machata | 3690fad | 2012-12-10 13:29:47 +0100 | [diff] [blame] | 21 | /* _GNU_SOURCE may be necessary for open_memstream visibility (see |
| 22 | * configure.ac), and there's no harm defining it just in case. */ |
| 23 | #define _GNU_SOURCE |
| 24 | |
| 25 | #include <stdio.h> |
Petr Machata | 2ae374a | 2012-12-08 05:08:48 +0100 | [diff] [blame] | 26 | #include <stdlib.h> |
| 27 | |
| 28 | #include "config.h" |
| 29 | #include "memstream.h" |
| 30 | |
| 31 | int |
| 32 | memstream_init(struct memstream *memstream) |
| 33 | { |
| 34 | #if HAVE_OPEN_MEMSTREAM |
| 35 | memstream->stream = open_memstream(&memstream->buf, |
| 36 | &memstream->size); |
| 37 | #else |
| 38 | memstream->stream = tmpfile(); |
Petr Machata | 2ae374a | 2012-12-08 05:08:48 +0100 | [diff] [blame] | 39 | memstream->buf = NULL; |
Oliver Spornitz | 67f7ade | 2013-02-10 16:30:45 +0100 | [diff] [blame] | 40 | #endif |
Petr Machata | 2ae374a | 2012-12-08 05:08:48 +0100 | [diff] [blame] | 41 | return memstream->stream != NULL ? 0 : -1; |
| 42 | } |
| 43 | |
| 44 | int |
| 45 | memstream_close(struct memstream *memstream) |
| 46 | { |
| 47 | #if !defined(HAVE_OPEN_MEMSTREAM) || !HAVE_OPEN_MEMSTREAM |
| 48 | if (fseek(memstream->stream, 0, SEEK_END) < 0) { |
| 49 | fail: |
| 50 | fclose(memstream->stream); |
| 51 | return -1; |
| 52 | } |
| 53 | memstream->size = ftell(memstream->stream); |
| 54 | if (memstream->size == (size_t)-1) |
| 55 | goto fail; |
| 56 | memstream->buf = malloc(memstream->size); |
| 57 | if (memstream->buf == NULL) |
| 58 | goto fail; |
| 59 | |
| 60 | rewind(memstream->stream); |
| 61 | if (fread(memstream->buf, 1, memstream->size, memstream->stream) |
| 62 | < memstream->size) |
| 63 | goto fail; |
| 64 | #endif |
| 65 | |
| 66 | return fclose(memstream->stream) == 0 ? 0 : -1; |
| 67 | } |
| 68 | |
| 69 | void |
| 70 | memstream_destroy(struct memstream *memstream) |
| 71 | { |
| 72 | free(memstream->buf); |
| 73 | } |