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14 | * You should have received a copy of the GNU General Public License |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write to the |
15 | * along with this program; if not, write to the |
16 | * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
16 | * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
17 | * Boston, MA 02110-1301, USA. |
17 | * Boston, MA 02110-1301, USA. |
18 | */ |
18 | */ |
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19 | |
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20 | #define _FILE_OFFSET_BITS 64 |
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21 | #define _LARGEFILE_SOURCE |
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22 | #define _LARGEFILE64_SOURCE |
19 | #include <stdlib.h> |
23 | #include <stdlib.h> |
20 | #include "maptool.h" |
24 | #include "maptool.h" |
21 | #include "debug.h" |
25 | #include "debug.h" |
22 | |
26 | |
23 | void |
27 | void |
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25 | { |
29 | { |
26 | FILE *f; |
30 | FILE *f; |
27 | f=fopen(filename,"rb+"); |
31 | f=fopen(filename,"rb+"); |
28 | if (! f) |
32 | if (! f) |
29 | f=fopen(filename,"wb+"); |
33 | f=fopen(filename,"wb+"); |
30 | |
34 | |
31 | dbg_assert(f != NULL); |
35 | dbg_assert(f != NULL); |
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36 | |
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37 | off_t offset_64=(off_t) offset; |
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38 | |
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39 | fprintf(stderr,"save_buffer:seeking bytes in %s to "LONGLONG_FMT"\n", filename, offset_64); |
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40 | |
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41 | int ret; |
32 | fseek(f, offset, SEEK_SET); |
42 | // ret=fseek(f, offset, SEEK_SET); |
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43 | ret=fseeko(f, offset_64, SEEK_SET); |
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44 | //fprintf(stderr,"ret.code of seek=%d\n", ret); |
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45 | size_t ret2; |
33 | fwrite(b->base, b->size, 1, f); |
46 | ret2=fwrite(b->base, b->size, 1, f); |
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47 | //fprintf(stderr,"ret.code of fwrite=%d\n", ret2); |
34 | fclose(f); |
48 | fclose(f); |
35 | } |
49 | } |
36 | |
50 | |
37 | void |
51 | void |
38 | load_buffer(char *filename, struct buffer *b, long long offset, long long size) |
52 | load_buffer(char *filename, struct buffer *b, long long offset, long long size) |
39 | { |
53 | { |
40 | FILE *f; |
54 | FILE *f; |
41 | long long len; |
55 | long long len; |
42 | int ret; |
56 | int ret; |
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57 | |
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58 | fprintf(stderr,"load_buffer:offset="LONGLONG_FMT" size="LONGLONG_FMT"\n", offset, size); |
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59 | |
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60 | // fprintf(stderr,"load_buffer 1 buffer ptr=%d\n", b->base); |
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61 | |
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62 | int reuse_buffer=0; |
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63 | |
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64 | fprintf(stderr,"load_buffer:info has b->malloced=%d\n", b->malloced); |
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65 | fprintf(stderr,"load_buffer:info has b->size="LONGLONG_FMT"\n", (size_t)b->size); |
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66 | fprintf(stderr,"load_buffer:info want size="LONGLONG_FMT"\n", size); |
43 | if (b->base) |
67 | if (b->base) |
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68 | { |
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69 | if (size > b->size) |
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70 | { |
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71 | fprintf(stderr,"load_buffer:# freeing buffer #\n"); |
44 | free(b->base); |
72 | free(b->base); |
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73 | //fprintf(stderr,"load_buffer 2 buffer ptr=%d\n", b->base); |
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74 | b->base=NULL; |
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75 | } |
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76 | else |
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77 | { |
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78 | fprintf(stderr,"load_buffer:@ re-using buffer @\n"); |
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79 | reuse_buffer=1; |
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80 | } |
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81 | } |
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82 | else |
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83 | { |
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84 | //fprintf(stderr,"* no buffer to free *\n"); |
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85 | } |
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86 | //fprintf(stderr,"load_buffer 3 buffer ptr=%d\n", b->base); |
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87 | |
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88 | if (! reuse_buffer) |
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89 | { |
45 | b->malloced=0; |
90 | b->malloced=0; |
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91 | } |
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92 | |
46 | f=fopen(filename,"rb"); |
93 | f=fopen(filename,"rb"); |
47 | fseek(f, 0, SEEK_END); |
94 | fseek(f, 0, SEEK_END); |
48 | len=ftell(f); |
95 | // len=ftell(f); |
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96 | len=ftello(f); // 64bit |
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97 | //fprintf(stderr,"load_buffer ftell="LONGLONG_FMT"\n", len); |
49 | if (offset+size > len) { |
98 | if (offset+size > len) { |
50 | size=len-offset; |
99 | size=len-offset; |
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100 | //fprintf(stderr,"load_buffer new size="LONGLONG_FMT"\n", size); |
51 | ret=1; |
101 | ret=1; |
52 | } |
102 | } |
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103 | |
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104 | b->size=size; |
53 | b->size=b->malloced=size; |
105 | b->malloced=size; |
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106 | |
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107 | |
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108 | off_t offset_64=(off_t) offset; |
54 | fprintf(stderr,"reading "LONGLONG_FMT" bytes from %s at "LONGLONG_FMT"\n", b->size, filename, offset); |
109 | fprintf(stderr,"load_buffer:reading "LONGLONG_FMT" bytes from %s at "LONGLONG_FMT"\n", b->size, filename, offset_64); |
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110 | |
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111 | int ret3; |
55 | fseek(f, offset, SEEK_SET); |
112 | // ret3=fseek(f, offset, SEEK_SET); |
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113 | ret3=fseeko(f, offset_64, SEEK_SET); // 64bit |
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114 | //fprintf(stderr,"ret.code of seek=%d\n", ret3); |
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115 | |
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116 | if (! reuse_buffer) |
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117 | { |
56 | b->base=malloc(b->size); |
118 | b->base=malloc((size_t)size); |
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119 | fprintf(stderr,"load_buffer:ret.code of malloc=%d\n", b->base); |
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120 | } |
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121 | |
57 | dbg_assert(b->base != NULL); |
122 | dbg_assert(b->base != NULL); |
58 | fread(b->base, b->size, 1, f); |
123 | fread(b->base, b->size, 1, f); |
59 | fclose(f); |
124 | fclose(f); |
60 | } |
125 | } |