Mercurial > hg > CbC > CbC_gcc
annotate gcc/genchecksum.c @ 81:dbfc0d2dde36
minor fix
author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Sat, 24 Sep 2011 02:43:04 +0900 |
parents | f6334be47118 |
children | 04ced10e8804 |
rev | line source |
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0 | 1 /* Generate checksums of executables for PCH validation |
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2 Copyright (C) 2005, 2007, 2009, 2010 |
0 | 3 Free Software Foundation, Inc. |
4 | |
5 This file is part of GCC. | |
6 | |
7 GCC is free software; you can redistribute it and/or modify it under | |
8 the terms of the GNU General Public License as published by the Free | |
9 Software Foundation; either version 3, or (at your option) any later | |
10 version. | |
11 | |
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
18 along with GCC; see the file COPYING3. If not see | |
19 <http://www.gnu.org/licenses/>. */ | |
20 | |
21 #include "bconfig.h" | |
22 #include "system.h" | |
23 #include "md5.h" | |
24 | |
25 static void | |
26 usage (void) | |
27 { | |
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28 fputs ("Usage: genchecksums <filename> ...\n", stderr); |
0 | 29 } |
30 | |
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31 /* Important: BLOCKSIZE must be a multiple of 64. */ |
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32 #define BLOCKSIZE 4096 |
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33 |
0 | 34 static void |
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35 dosum (struct md5_ctx *ctx, const char *file) |
0 | 36 { |
37 FILE *f; | |
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38 char buffer[BLOCKSIZE + 72]; |
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39 size_t sum; |
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40 |
0 | 41 f = fopen (file, "rb"); |
42 if (!f) | |
43 { | |
44 fprintf (stderr, "opening %s: %s\n", file, xstrerror (errno)); | |
45 exit (1); | |
46 } | |
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47 |
0 | 48 /* Some executable formats have timestamps in the first 16 bytes, yuck. */ |
49 if (fseek (f, 16, SEEK_SET) != 0) | |
50 { | |
51 fprintf (stderr, "seeking in %s: %s\n", file, xstrerror (errno)); | |
52 exit (1); | |
53 } | |
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54 |
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55 /* Iterate over full file contents. */ |
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56 while (1) |
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57 { |
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58 /* We read the file in blocks of BLOCKSIZE bytes. One call of the |
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59 computation function processes the whole buffer so that with the |
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60 next round of the loop another block can be read. */ |
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61 size_t n; |
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62 sum = 0; |
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63 |
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64 /* Read block. Take care for partial reads. */ |
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65 do |
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66 { |
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67 n = fread (buffer + sum, 1, BLOCKSIZE - sum, f); |
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68 |
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69 sum += n; |
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70 } |
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71 while (sum < BLOCKSIZE && n != 0); |
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72 if (n == 0 && ferror (f)) |
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73 exit (1); |
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74 |
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75 /* If end of file is reached, end the loop. */ |
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76 if (n == 0) |
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77 break; |
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78 |
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79 /* Process buffer with BLOCKSIZE bytes. Note that |
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80 BLOCKSIZE % 64 == 0 |
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81 */ |
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82 md5_process_block (buffer, BLOCKSIZE, ctx); |
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83 } |
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84 |
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85 /* Add the last bytes if necessary. */ |
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86 if (sum > 0) |
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87 md5_process_bytes (buffer, sum, ctx); |
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88 |
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89 if (fclose (f) != 0) |
0 | 90 { |
91 fprintf (stderr, "reading %s: %s\n", file, xstrerror (errno)); | |
92 exit (1); | |
93 } | |
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94 } |
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95 |
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96 int |
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97 main (int argc, char ** argv) |
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98 { |
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99 struct md5_ctx ctx; |
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100 unsigned char result[16]; |
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101 int i; |
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102 |
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103 if (argc < 2) |
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104 { |
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105 usage (); |
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106 return 1; |
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107 } |
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108 |
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109 md5_init_ctx (&ctx); |
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110 for (i = 1; i < argc; i++) |
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111 dosum (&ctx, argv[i]); |
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112 md5_finish_ctx (&ctx, result); |
0 | 113 |
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114 puts ("#include \"config.h\""); |
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115 puts ("#include \"system.h\""); |
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116 fputs ("EXPORTED_CONST unsigned char executable_checksum[16] = { ", stdout); |
0 | 117 for (i = 0; i < 16; i++) |
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118 printf ("0x%02x%s", result[i], i == 15 ? " };\n" : ", "); |
0 | 119 |
120 return 0; | |
121 } |