BadVPN – Blame information for rev 1
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| Rev | Author | Line No. | Line |
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| 1 | office | 1 | /** |
| 2 | * @file read_file.h |
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| 3 | * @author Ambroz Bizjak <ambrop7@gmail.com> |
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| 4 | * |
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| 5 | * @section LICENSE |
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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 are met: |
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| 9 | * 1. Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * 3. Neither the name of the author nor the |
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| 15 | * names of its contributors may 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 BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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| 19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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| 20 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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| 21 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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| 22 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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| 23 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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| 24 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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| 25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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| 27 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 28 | * |
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| 29 | * @section DESCRIPTION |
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| 30 | * |
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| 31 | * Function for reading a file into memory using stdio. |
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| 32 | */ |
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| 33 | |||
| 34 | #ifndef BADVPN_MISC_READ_FILE_H |
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| 35 | #define BADVPN_MISC_READ_FILE_H |
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| 36 | |||
| 37 | #include <stddef.h> |
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| 38 | #include <stdint.h> |
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| 39 | #include <stdlib.h> |
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| 40 | #include <stdio.h> |
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| 41 | |||
| 42 | static int read_file (const char *file, uint8_t **out_data, size_t *out_len) |
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| 43 | { |
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| 44 | FILE *f = fopen(file, "r"); |
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| 45 | if (!f) { |
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| 46 | goto fail0; |
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| 47 | } |
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| 48 | |||
| 49 | size_t buf_len = 0; |
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| 50 | size_t buf_size = 128; |
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| 51 | |||
| 52 | uint8_t *buf = (uint8_t *)malloc(buf_size); |
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| 53 | if (!buf) { |
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| 54 | goto fail1; |
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| 55 | } |
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| 56 | |||
| 57 | while (1) { |
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| 58 | if (buf_len == buf_size) { |
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| 59 | if (2 > SIZE_MAX / buf_size) { |
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| 60 | goto fail; |
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| 61 | } |
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| 62 | size_t newsize = 2 * buf_size; |
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| 63 | |||
| 64 | uint8_t *newbuf = (uint8_t *)realloc(buf, newsize); |
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| 65 | if (!newbuf) { |
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| 66 | goto fail; |
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| 67 | } |
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| 68 | |||
| 69 | buf = newbuf; |
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| 70 | buf_size = newsize; |
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| 71 | } |
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| 72 | |||
| 73 | size_t bytes = fread(buf + buf_len, 1, buf_size - buf_len, f); |
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| 74 | if (bytes == 0) { |
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| 75 | if (feof(f)) { |
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| 76 | break; |
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| 77 | } |
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| 78 | goto fail; |
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| 79 | } |
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| 80 | |||
| 81 | buf_len += bytes; |
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| 82 | } |
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| 83 | |||
| 84 | fclose(f); |
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| 85 | |||
| 86 | *out_data = buf; |
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| 87 | *out_len = buf_len; |
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| 88 | return 1; |
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| 89 | |||
| 90 | fail: |
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| 91 | free(buf); |
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| 92 | fail1: |
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| 93 | fclose(f); |
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| 94 | fail0: |
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| 95 | return 0; |
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| 96 | } |
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| 97 | |||
| 98 | #endif |