| [117] | 1 | /* +++Date last modified: 05-Jul-1997 */ |
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| 2 | |
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| 3 | /* |
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| 4 | ** BITFILES.C - reading/writing bit files |
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| 5 | ** |
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| 6 | ** Public domain by Aare Tali |
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| 7 | */ |
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| 8 | |
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| 9 | #include <stdlib.h> |
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| 10 | #include "bitcount-bitops.h" |
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| 11 | |
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| 12 | bfile *bfopen(char *name, char *mode) |
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| 13 | { |
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| 14 | bfile * bf; |
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| 15 | |
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| 16 | bf = malloc(sizeof(bfile)); |
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| 17 | if (NULL == bf) |
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| 18 | return NULL; |
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| 19 | bf->file = fopen(name, mode); |
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| 20 | if (NULL == bf->file) |
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| 21 | { |
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| 22 | free(bf); |
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| 23 | return NULL; |
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| 24 | } |
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| 25 | bf->rcnt = 0; |
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| 26 | bf->wcnt = 0; |
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| 27 | return bf; |
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| 28 | } |
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| 29 | |
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| 30 | int bfread(bfile *bf) |
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| 31 | { |
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| 32 | if (0 == bf->rcnt) /* read new byte */ |
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| 33 | { |
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| 34 | bf->rbuf = (char)fgetc(bf->file); |
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| 35 | bf->rcnt = 8; |
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| 36 | } |
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| 37 | bf->rcnt--; |
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| 38 | return (bf->rbuf & (1 << bf->rcnt)) != 0; |
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| 39 | } |
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| 40 | |
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| 41 | void bfwrite(int bit, bfile *bf) |
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| 42 | { |
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| 43 | if (8 == bf->wcnt) /* write full byte */ |
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| 44 | { |
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| 45 | fputc(bf->wbuf, bf->file); |
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| 46 | bf->wcnt = 0; |
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| 47 | } |
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| 48 | bf->wcnt++; |
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| 49 | bf->wbuf <<= 1; |
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| 50 | bf->wbuf |= bit & 1; |
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| 51 | } |
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| 52 | |
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| 53 | void bfclose(bfile *bf) |
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| 54 | { |
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| 55 | fclose(bf->file); |
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| 56 | free(bf); |
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| 57 | } |
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| 58 | |
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| 59 | #ifdef TEST |
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| 60 | |
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| 61 | void test1(void) |
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| 62 | { |
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| 63 | bfile *out; |
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| 64 | bfile *in; |
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| 65 | FILE *in1; |
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| 66 | FILE *in2; |
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| 67 | |
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| 68 | in = bfopen("bitfiles.c", "rb"); |
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| 69 | out = bfopen("bitfiles.cc", "wb"); |
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| 70 | if ((NULL == in) || (NULL == out)) |
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| 71 | { |
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| 72 | printf("Can't open/create test files\n"); |
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| 73 | exit(1); |
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| 74 | } |
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| 75 | while (!feof(in->file)) |
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| 76 | bfwrite(bfread(in), out); |
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| 77 | bfclose(in); |
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| 78 | bfclose(out); |
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| 79 | in1 = fopen("bitfiles.c", "rb"); |
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| 80 | in2 = fopen("bitfiles.cc", "rb"); |
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| 81 | if ((NULL == in1) || (NULL == in2)) |
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| 82 | { |
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| 83 | printf("Can't open test files for verifying\n"); |
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| 84 | exit(1); |
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| 85 | } |
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| 86 | while (!feof(in1) && !feof(in2)) |
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| 87 | { |
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| 88 | if (fgetc(in1) != fgetc(in2)) |
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| 89 | { |
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| 90 | printf("Files not identical, copy failed!\n"); |
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| 91 | exit(1); |
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| 92 | } |
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| 93 | } |
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| 94 | if (!feof(in1) || !feof(in2)) |
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| 95 | { |
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| 96 | printf("Not same size, copy failed!\n"); |
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| 97 | exit(1); |
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| 98 | } |
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| 99 | fclose(in1); |
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| 100 | fclose(in2); |
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| 101 | } |
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| 102 | |
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| 103 | void test2(void) |
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| 104 | { |
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| 105 | FILE *in1; |
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| 106 | bfile *in2; |
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| 107 | int ch; |
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| 108 | |
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| 109 | in1 = fopen("bitfiles.c", "rb"); |
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| 110 | in2 = bfopen("bitfiles.cc", "rb"); |
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| 111 | if ((NULL == in1) || (NULL == in2)) |
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| 112 | { |
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| 113 | printf("Can't open test files\n"); |
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| 114 | exit(1); |
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| 115 | } |
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| 116 | while (!feof(in1) && !feof(in2->file)) |
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| 117 | { |
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| 118 | ch = fgetc(in1); |
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| 119 | if (ch < ' ') |
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| 120 | ch = '.'; |
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| 121 | printf(" '%c' ", ch); |
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| 122 | for (ch = 0; ch < 8; ch++) |
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| 123 | printf("%c", "01"[bfread(in2)]); |
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| 124 | printf(" "); |
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| 125 | } |
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| 126 | fclose(in1); |
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| 127 | bfclose(in2); |
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| 128 | } |
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| 129 | |
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| 130 | main() |
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| 131 | { |
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| 132 | test1(); |
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| 133 | test2(); |
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| 134 | return 0; |
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| 135 | } |
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| 136 | |
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| 137 | #endif /* TEST */ |
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