The Android Open Source Project | 10e23ee | 2009-03-03 19:30:30 -0800 | [diff] [blame] | 1 | /** |
| 2 | * @file op_fileio.c |
| 3 | * Reading from / writing to files |
| 4 | * |
| 5 | * @remark Copyright 2002 OProfile authors |
| 6 | * @remark Read the file COPYING |
| 7 | * |
| 8 | * @author John Levon |
| 9 | * @author Philippe Elie |
| 10 | */ |
| 11 | |
| 12 | #include <unistd.h> |
| 13 | |
| 14 | #include "op_fileio.h" |
| 15 | |
| 16 | #include "op_libiberty.h" |
| 17 | |
| 18 | #include <errno.h> |
| 19 | #include <string.h> |
| 20 | #include <stdlib.h> |
| 21 | |
| 22 | static FILE * op_do_open_file(char const * name, char const * mode, int fatal) |
| 23 | { |
| 24 | FILE * fp; |
| 25 | |
| 26 | fp = fopen(name, mode); |
| 27 | |
| 28 | if (!fp) { |
| 29 | if (fatal) { |
| 30 | fprintf(stderr,"oprofiled:op_do_open_file: %s: %s", |
| 31 | name, strerror(errno)); |
| 32 | exit(EXIT_FAILURE); |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | return fp; |
| 37 | } |
| 38 | |
| 39 | |
| 40 | FILE * op_try_open_file(char const * name, char const * mode) |
| 41 | { |
| 42 | return op_do_open_file(name, mode, 0); |
| 43 | } |
| 44 | |
| 45 | |
| 46 | FILE * op_open_file(char const * name, char const * mode) |
| 47 | { |
| 48 | return op_do_open_file(name, mode, 1); |
| 49 | } |
| 50 | |
| 51 | |
| 52 | void op_close_file(FILE * fp) |
| 53 | { |
| 54 | if (fclose(fp)) |
| 55 | perror("oprofiled:op_close_file: "); |
| 56 | } |
| 57 | |
| 58 | |
| 59 | void op_write_file(FILE * fp, void const * buf, size_t size) |
| 60 | { |
| 61 | size_t written; |
| 62 | |
| 63 | if (size == 0) |
| 64 | return; |
| 65 | |
| 66 | written = fwrite(buf, size, 1, fp); |
| 67 | |
| 68 | if (written != 1) { |
| 69 | fprintf(stderr, |
| 70 | "oprofiled:op_write_file: wrote less than expected: %lu bytes.\n", |
| 71 | (unsigned long)size); |
| 72 | exit(EXIT_FAILURE); |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | |
| 77 | void op_write_u8(FILE * fp, u8 val) |
| 78 | { |
| 79 | op_write_file(fp, &val, sizeof(val)); |
| 80 | } |
| 81 | |
| 82 | |
| 83 | void op_write_u32(FILE * fp, u32 val) |
| 84 | { |
| 85 | op_write_file(fp, &val, sizeof(val)); |
| 86 | } |
| 87 | |
| 88 | |
| 89 | void op_write_u64(FILE * fp, u64 val) |
| 90 | { |
| 91 | op_write_file(fp, &val, sizeof(val)); |
| 92 | } |
| 93 | |
| 94 | |
| 95 | u32 op_read_int_from_file(char const * filename, int fatal) |
| 96 | { |
| 97 | FILE * fp; |
| 98 | u32 value; |
| 99 | |
| 100 | fp = fopen(filename, "r"); |
| 101 | if (fp == NULL) { |
| 102 | if (!fatal) |
| 103 | return (u32)-1; |
| 104 | fprintf(stderr, |
| 105 | "op_read_int_from_file: Failed to open %s, reason %s\n", |
| 106 | filename, strerror(errno)); |
| 107 | exit(EXIT_FAILURE); |
| 108 | } |
| 109 | |
| 110 | if (fscanf(fp, "%u", &value) != 1) { |
| 111 | fclose(fp); |
| 112 | if (!fatal) |
| 113 | return (u32)-1; |
| 114 | fprintf(stderr, |
| 115 | "op_read_int_from_file: Failed to convert contents of file %s to integer\n", |
| 116 | filename); |
| 117 | exit(EXIT_FAILURE); |
| 118 | } |
| 119 | |
| 120 | fclose(fp); |
| 121 | |
| 122 | return value; |
| 123 | } |
| 124 | |
| 125 | |
| 126 | char * op_get_line(FILE * fp) |
| 127 | { |
| 128 | char * buf; |
| 129 | char * cp; |
| 130 | int c; |
| 131 | size_t max = 512; |
| 132 | |
| 133 | buf = xmalloc(max); |
| 134 | cp = buf; |
| 135 | |
| 136 | while (1) { |
| 137 | switch (c = getc(fp)) { |
| 138 | case EOF: |
| 139 | free(buf); |
| 140 | return NULL; |
| 141 | break; |
| 142 | |
| 143 | case '\n': |
| 144 | case '\0': |
| 145 | *cp = '\0'; |
| 146 | return buf; |
| 147 | break; |
| 148 | |
| 149 | default: |
| 150 | *cp = (char)c; |
| 151 | cp++; |
| 152 | if (((size_t)(cp - buf)) == max) { |
| 153 | buf = xrealloc(buf, max + 128); |
| 154 | cp = buf + max; |
| 155 | max += 128; |
| 156 | } |
| 157 | break; |
| 158 | } |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | |
| 163 | /* FIXME the debug info stuff should be handled by binutils */ |
| 164 | unsigned long |
| 165 | calc_crc32(unsigned long crc, unsigned char * buf, size_t len) |
| 166 | { |
| 167 | static const unsigned long crc32_table[256] = |
| 168 | { |
| 169 | 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, |
| 170 | 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, |
| 171 | 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, |
| 172 | 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, |
| 173 | 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, |
| 174 | 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, |
| 175 | 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, |
| 176 | 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, |
| 177 | 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, |
| 178 | 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, |
| 179 | 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, |
| 180 | 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, |
| 181 | 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, |
| 182 | 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, |
| 183 | 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, |
| 184 | 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, |
| 185 | 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, |
| 186 | 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, |
| 187 | 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, |
| 188 | 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, |
| 189 | 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, |
| 190 | 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, |
| 191 | 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, |
| 192 | 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, |
| 193 | 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, |
| 194 | 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, |
| 195 | 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, |
| 196 | 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, |
| 197 | 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, |
| 198 | 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, |
| 199 | 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, |
| 200 | 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, |
| 201 | 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, |
| 202 | 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, |
| 203 | 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, |
| 204 | 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, |
| 205 | 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, |
| 206 | 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, |
| 207 | 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, |
| 208 | 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, |
| 209 | 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, |
| 210 | 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, |
| 211 | 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, |
| 212 | 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, |
| 213 | 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, |
| 214 | 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, |
| 215 | 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, |
| 216 | 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, |
| 217 | 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, |
| 218 | 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, |
| 219 | 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, |
| 220 | 0x2d02ef8d |
| 221 | }; |
| 222 | unsigned char * end; |
| 223 | |
| 224 | crc = ~crc & 0xffffffff; |
| 225 | for (end = buf + len; buf < end; ++buf) |
| 226 | crc = crc32_table[(crc ^ *buf) & 0xff] ^ (crc >> 8); |
| 227 | return ~crc & 0xffffffff; |
| 228 | } |