[1] | 1 | #define FILE char |
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| 2 | #define FCBSIZE 320 |
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| 3 | #define NFILES 8 |
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| 4 | |
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| 5 | #define NULL 0 |
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| 6 | #define EOF (-1) |
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| 7 | |
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| 8 | #define stdin _fcbtbl[0] |
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| 9 | #define stdout _fcbtbl[1] |
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| 10 | #define stderr _fcbtbl[2] |
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| 11 | |
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| 12 | #define STDIN 0xffff |
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| 13 | #define STDOUT 0xfffe |
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| 14 | #define STDERR 0xfffd |
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| 15 | |
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| 16 | FILE *_fcbtbl[NFILES]; |
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| 17 | |
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| 18 | _main(argc,argv) |
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| 19 | int argc; |
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| 20 | char **argv; |
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| 21 | {int i; |
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| 22 | stdin = STDIN; |
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| 23 | stdout = STDOUT; |
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| 24 | stderr = STDERR; |
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| 25 | initheap(); |
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| 26 | for ( i = 3; i < NFILES; i++ ) _fcbtbl[i] = NULL; |
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| 27 | main(argc,argv); |
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| 28 | } |
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| 29 | |
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| 30 | FILE *fopen(name,mode) |
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| 31 | char *name,*mode; |
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| 32 | {FILE *fcbp; |
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| 33 | char *p; |
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| 34 | int rd,wt,cm; |
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| 35 | rd = wt = cm = 0; |
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| 36 | for ( p = mode; *p; p++ ) { |
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| 37 | switch ( *p ) { |
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| 38 | case 'r': |
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| 39 | rd = 1; break; |
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| 40 | case 'w': |
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| 41 | wt = 1; break; |
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| 42 | case 'c': |
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| 43 | cm = 1; break; |
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| 44 | default: |
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| 45 | return NULL; |
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| 46 | } |
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| 47 | } |
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| 48 | if ( !(rd ^ wt) ) return NULL; |
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| 49 | if ( rd ) return _open(name,cm); |
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| 50 | else return _create(name,cm); |
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| 51 | } |
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| 52 | |
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| 53 | FILE *_open(name,cm) |
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| 54 | char *name; |
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| 55 | int cm; |
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| 56 | {FILE *fcbp; |
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| 57 | int i; |
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| 58 | for ( i = 0; i < NFILES; i++) |
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| 59 | if ( _fcbtbl[i] == NULL ) break; |
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| 60 | if ( i >= NFILES) return NULL; |
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| 61 | if ( (fcbp = malloc(FCBSIZE)) == NULL ) return NULL; |
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| 62 | if ( _setname(name,fcbp) == 0 ) return NULL; |
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| 63 | if ( FMS(fcbp,1) < 0 ) return NULL; |
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| 64 | fcbp[59] = cm ? 0 : 0xff; |
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| 65 | fcbp[60] = 0; |
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| 66 | return (_fcbtbl[i] = fcbp); |
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| 67 | } |
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| 68 | |
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| 69 | FILE *_create(name,cm) |
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| 70 | char *name; |
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| 71 | int cm; |
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| 72 | {FILE *fcbp; |
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| 73 | int i; |
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| 74 | for ( i = 0; i < NFILES; i++) |
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| 75 | if ( _fcbtbl[i] == NULL ) break; |
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| 76 | if ( i >= NFILES) return NULL; |
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| 77 | if ( (fcbp = malloc(FCBSIZE)) == NULL ) return NULL; |
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| 78 | if ( _setname(name,fcbp) == 0 ) return NULL; |
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| 79 | if ( FMS(fcbp,2) < 0 ) |
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| 80 | { if ( (fcbp[1] != 3) || (FMS(fcbp,12) < 0) ) return NULL; |
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| 81 | _setname(name,fcbp); |
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| 82 | if (FMS(fcbp,2) < 0) return NULL; |
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| 83 | } |
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| 84 | fcbp[15] = 0; |
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| 85 | fcbp[59] = cm ? 0 : 0xff; |
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| 86 | fcbp[60] = 0; |
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| 87 | return (_fcbtbl[i] = fcbp); |
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| 88 | } |
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| 89 | |
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| 90 | fclose(fcbp) |
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| 91 | FILE *fcbp; |
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| 92 | {int i; |
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| 93 | for ( i = 0; i < NFILES; i++ ) |
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| 94 | if ( fcbp == _fcbtbl[i] ) break; |
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| 95 | if ( i >= NFILES ) return EOF; |
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| 96 | _fcbtbl[i] = NULL; |
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| 97 | if ( (fcbp == STDIN) || (fcbp == STDOUT) || (fcbp == STDERR) ) return 0; |
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| 98 | if ( FMS(fcbp,4) < 0 ) return EOF; |
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| 99 | mfree(fcbp); |
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| 100 | return 0; |
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| 101 | } |
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| 102 | |
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| 103 | _setname(name,fcbp) |
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| 104 | char *name,*fcbp; |
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| 105 | {int i; |
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| 106 | while(isspace(*name)) ++name; |
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| 107 | if (isdigit(*name)) |
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| 108 | { fcbp[3] = *name++ - '0'; |
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| 109 | if (*name++ != '.') return 0; |
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| 110 | } |
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| 111 | else fcbp[3] = 0xff; |
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| 112 | for (i = 4; i < 15; ++i) fcbp[i] = 0; |
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| 113 | if (!isalpha(*name)) return -1; |
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| 114 | for (i = 4; i < 12; ++i) |
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| 115 | { if (!*name || (*name == '.')) break; |
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| 116 | fcbp[i] = *name++; |
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| 117 | } |
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| 118 | while (*name && (*name != '.')) ++name; |
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| 119 | if (*name == '.') |
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| 120 | { ++name; |
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| 121 | for (i = 12; i < 15; ++i) |
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| 122 | { if (!*name) break; |
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| 123 | fcbp[i] = *name++; |
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| 124 | } |
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| 125 | } |
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| 126 | return 1; |
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| 127 | } |
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| 128 | |
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| 129 | |
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| 130 | getc(fcbp) |
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| 131 | char *fcbp; |
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| 132 | { |
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| 133 | switch (fcbp) |
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| 134 | {case STDIN: |
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| 135 | return GETCH(); |
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| 136 | case STDOUT: |
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| 137 | case STDERR: |
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| 138 | return EOF; |
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| 139 | default: |
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| 140 | if (fcbp[2] != 1) return EOF; |
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| 141 | return FMS(fcbp,0); |
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| 142 | } |
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| 143 | } |
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| 144 | |
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| 145 | putc(c,fcbp) |
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| 146 | char c,*fcbp; |
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| 147 | { if ( c == '\t' ) c = ' '; |
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| 148 | switch (fcbp) |
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| 149 | {case STDIN: |
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| 150 | return EOF; |
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| 151 | case STDOUT: |
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| 152 | return PUTCH(c); |
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| 153 | case STDERR: |
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| 154 | return PUTCH2(c); |
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| 155 | default: |
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| 156 | if (fcbp[2] != 2) return EOF; |
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| 157 | if (FMS(fcbp,0,c) < 0) return EOF; |
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| 158 | return c; |
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| 159 | } |
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| 160 | } |
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| 161 | |
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| 162 | getchar() |
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| 163 | { return getc(stdin); |
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| 164 | } |
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| 165 | |
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| 166 | putchar(c) |
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| 167 | char c; |
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| 168 | { return putc(c,stdout); |
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| 169 | } |
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| 170 | |
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| 171 | printf(s) |
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| 172 | char *s; |
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| 173 | { _fprintf(stdout,s,(int *)&s+1); |
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| 174 | } |
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| 175 | |
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| 176 | fprintf(f,s) |
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| 177 | char *f,*s; |
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| 178 | { _fprintf(f,s,(int *)&s+1); |
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| 179 | } |
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| 180 | |
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| 181 | _fprintf(f,s,p) |
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| 182 | char *f,*s; |
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| 183 | int *p; |
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| 184 | {int l,m,n; |
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| 185 | char c,buf[8]; |
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| 186 | while(c = *s++) |
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| 187 | if (c != '%') putc(c,f); |
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| 188 | else |
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| 189 | { if (l=(*s == '-')) ++s; |
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| 190 | if (isdigit(*s)) s += _getint(&m,s); |
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| 191 | else m = 0; |
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| 192 | if (*s == '.') ++s; |
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| 193 | if (isdigit(*s)) s += _getint(&n,s); |
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| 194 | else n = 32767; |
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| 195 | switch(*s++) |
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| 196 | {case 'd': |
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| 197 | itoa(*p++,buf); |
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| 198 | break; |
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| 199 | case 'o': |
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| 200 | itooa(*p++,buf); |
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| 201 | break; |
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| 202 | case 'x': |
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| 203 | itoxa(*p++,buf); |
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| 204 | break; |
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| 205 | case 'u': |
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| 206 | itoua(*p++,buf); |
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| 207 | break; |
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| 208 | case 'c': |
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| 209 | ctos(*p++,buf); |
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| 210 | break; |
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| 211 | case 's': |
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| 212 | _putstr(f,*p++,l,m,n); |
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| 213 | continue; |
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| 214 | case '\0': |
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| 215 | return; |
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| 216 | default: |
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| 217 | ctos(c,buf); |
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| 218 | break; |
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| 219 | } |
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| 220 | _putstr(f,buf,l,m,n); |
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| 221 | } |
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| 222 | } |
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| 223 | |
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| 224 | _getint(p,s) |
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| 225 | int *p; |
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| 226 | char *s; |
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| 227 | {int i; |
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| 228 | for(*p=i=0; isdigit(*s); ++i) *p = *p * 10 + *s++ - '0'; |
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| 229 | return i; |
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| 230 | } |
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| 231 | |
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| 232 | _putstr(f,s,l,m,n) |
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| 233 | char *f,*s; |
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| 234 | int l,m,n; |
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| 235 | {int k; |
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| 236 | k = (strlen(s) < n ? strlen(s) : n); |
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| 237 | m = (k < m ? m-k : 0); |
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| 238 | if (l) |
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| 239 | { _putsn(f,s,n); |
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| 240 | _putspc(f,m); |
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| 241 | } |
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| 242 | else |
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| 243 | { _putspc(f,m); |
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| 244 | _putsn(f,s,n); |
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| 245 | } |
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| 246 | } |
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| 247 | |
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| 248 | _putsn(f,s,n) |
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| 249 | char *f,*s; |
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| 250 | int n; |
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| 251 | { while(*s) |
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| 252 | if (--n >= 0) putc(*s++,f); |
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| 253 | else break; |
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| 254 | } |
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| 255 | |
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| 256 | _putspc(f,n) |
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| 257 | char *f; |
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| 258 | int n; |
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| 259 | { while(--n >= 0) putc(' ',f); |
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| 260 | } |
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| 261 | |
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| 262 | puts(s) |
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| 263 | char *s; |
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| 264 | { while(*s) putchar(*s++); |
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| 265 | } |
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| 266 | |
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| 267 | itoa(n,s) |
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| 268 | int n; |
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| 269 | char *s; |
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| 270 | { if (n < 0) |
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| 271 | { *s++ = '-'; |
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| 272 | return (itoua(-n,s)+1); |
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| 273 | } |
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| 274 | return itoua(n,s); |
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| 275 | } |
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| 276 | |
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| 277 | itoua(n,s) |
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| 278 | int n; |
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| 279 | char *s; |
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| 280 | { return _itoda(n,s,10); |
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| 281 | } |
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| 282 | |
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| 283 | itooa(n,s) |
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| 284 | int n; |
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| 285 | char *s; |
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| 286 | { return _itoda(n,s,8); |
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| 287 | } |
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| 288 | |
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| 289 | itoxa(n,s) |
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| 290 | int n; |
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| 291 | char *s; |
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| 292 | { return _itoda(n,s,16); |
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| 293 | } |
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| 294 | |
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| 295 | _itoac(n) |
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| 296 | int n; |
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| 297 | { return (n + ((n < 10) ? '0' : ('A'-10))); |
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| 298 | } |
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| 299 | |
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| 300 | _itoda(n,s,r) |
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| 301 | unsigned n; |
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| 302 | int r; |
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| 303 | char *s; |
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| 304 | {int i; |
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| 305 | char t[8],*u; |
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| 306 | u = t; |
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| 307 | *u++ = '\0'; |
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| 308 | do *u++ = _itoac(n % r); while(n /= r); |
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| 309 | for (i=0; *s++ = *--u; ++i); |
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| 310 | return i; |
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| 311 | } |
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| 312 | |
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| 313 | char *ctos(c,s) |
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| 314 | char c,*s; |
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| 315 | { s[0] = c; |
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| 316 | s[1] = '\0'; |
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| 317 | return s; |
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| 318 | } |
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| 319 | |
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| 320 | strlen(s) |
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| 321 | char *s; |
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| 322 | {int i; |
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| 323 | for(i = 0; *s++; ++i); |
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| 324 | return i; |
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| 325 | } |
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| 326 | |
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| 327 | isdigit(c) |
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| 328 | char c; |
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| 329 | { return '0' <= c && c <= '9'; |
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| 330 | } |
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| 331 | |
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| 332 | isspace(c) |
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| 333 | char c; |
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| 334 | { return (c == ' ' || c == '\t' || c == '\n'); |
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| 335 | } |
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| 336 | |
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| 337 | isalpha(c) |
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| 338 | char c; |
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| 339 | { return (isupper(c) || islower(c) || c == '_'); |
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| 340 | } |
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| 341 | |
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| 342 | isupper(c) |
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| 343 | char c; |
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| 344 | { return ('A' <= c && c <= 'Z'); |
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| 345 | } |
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| 346 | |
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| 347 | islower(c) |
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| 348 | char c; |
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| 349 | { return ('a' <= c && c <= 'z'); |
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| 350 | } |
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| 351 | |
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| 352 | toupper(c) |
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| 353 | char c; |
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| 354 | { return (islower(c) ? c + ('A'-'a') : c); |
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| 355 | } |
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| 356 | |
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| 357 | tolower(c) |
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| 358 | char c; |
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| 359 | { return (isupper(c) ? c + ('a'-'A') : c); |
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| 360 | } |
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| 361 | |
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| 362 | atoi(s) |
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| 363 | char *s; |
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| 364 | {int i; |
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| 365 | while (isspace(*s)) ++s; |
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| 366 | for (i = 0; isdigit(*s);) i = i * 10 + *s++ - '0'; |
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| 367 | return i; |
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| 368 | } |
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| 369 | |
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| 370 | typedef struct header |
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| 371 | { struct header *bptr; |
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| 372 | unsigned bsize; |
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| 373 | } HEADER; |
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| 374 | |
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| 375 | HEADER base,*allocp,*heapp; |
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| 376 | |
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| 377 | char *malloc(s) |
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| 378 | unsigned s; |
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| 379 | {HEADER *p,*q; |
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| 380 | int nunits; |
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| 381 | nunits = 1 + (s + sizeof(HEADER) - 1) / sizeof(HEADER); |
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| 382 | if ((q = allocp) == NULL) |
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| 383 | { base.bptr = allocp = q = &base; |
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| 384 | base.bsize = 0; |
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| 385 | } |
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| 386 | for (p = q->bptr; ; q = p,p = p->bptr) |
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| 387 | { if (p->bsize >= nunits) |
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| 388 | { if (p->bsize == nunits) |
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| 389 | q->bptr = p->bptr; |
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| 390 | else |
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| 391 | { p->bsize -= nunits; |
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| 392 | p += p->bsize; |
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| 393 | p->bsize = nunits; |
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| 394 | } |
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| 395 | allocp = q; |
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| 396 | clearblock(p); |
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| 397 | return ((char *)(p + 1)); |
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| 398 | } |
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| 399 | if (p == allocp) |
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| 400 | if ((p = morecore(nunits)) == NULL) |
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| 401 | return(NULL); |
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| 402 | } |
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| 403 | } |
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| 404 | |
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| 405 | clearblock(p) |
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| 406 | HEADER *p; |
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| 407 | {char *s,*t; |
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| 408 | s = (char *)(p + 1); |
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| 409 | t = (char *)(p + p->bsize); |
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| 410 | while (s < t) *s++ = 0; |
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| 411 | } |
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| 412 | |
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| 413 | #define NALLOC 128 |
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| 414 | |
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| 415 | HEADER *morecore(nu) |
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| 416 | unsigned nu; |
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| 417 | {char *cp; |
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| 418 | HEADER *up; |
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| 419 | int rnu; |
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| 420 | rnu = NALLOC * ((nu + NALLOC - 1) / NALLOC); |
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| 421 | cp = sbrk(rnu * sizeof(HEADER)); |
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| 422 | if ((int)cp == -1) return NULL; |
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| 423 | up = (HEADER *) cp; |
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| 424 | up->bsize = rnu; |
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| 425 | mfree((char *)(up+1)); |
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| 426 | return allocp; |
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| 427 | } |
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| 428 | |
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| 429 | #asm |
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| 430 | sbrk PSHS U |
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| 431 | LEAU ,S |
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| 432 | |
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| 433 | LDD heapp,Y |
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| 434 | BNE _mc0 |
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| 435 | BSR initheap |
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| 436 | _mc0 PSHS D |
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| 437 | TFR S,D |
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| 438 | SUBD ,S++ |
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| 439 | CMPD 4,U |
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| 440 | BCC _mc1 |
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| 441 | LDD #-1 |
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| 442 | LEAS ,U |
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| 443 | PULS U,PC |
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| 444 | |
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| 445 | _mc1 LDD 4,U |
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| 446 | LDX heapp,Y |
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| 447 | LEAX D,X |
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| 448 | LDD heapp,Y |
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| 449 | STX heapp,Y |
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| 450 | LEAS ,U |
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| 451 | PULS U,PC |
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| 452 | |
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| 453 | initheap |
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| 454 | PSHS U |
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| 455 | LEAU ,S |
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| 456 | TFR Y,D |
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| 457 | ADDD #_GLOBALS |
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| 458 | STD heapp,Y |
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| 459 | LEAS ,U |
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| 460 | PULS U,PC |
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| 461 | #endasm |
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| 462 | |
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| 463 | mfree(ap) |
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| 464 | char *ap; |
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| 465 | {HEADER *p,*q; |
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| 466 | p = (HEADER *)ap - 1; |
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| 467 | for (q = allocp; !(p > q && p < q->bptr); q = q->bptr) |
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| 468 | if (q >= q->bptr && (p > q || p < q->bptr)) break; |
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| 469 | if (p + p->bsize == q->bptr) |
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| 470 | { p->bsize += q->bptr->bsize; |
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| 471 | p->bptr = q->bptr->bptr; |
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| 472 | } |
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| 473 | else p->bptr = q->bptr; |
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| 474 | if (q + q->bsize == p) |
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| 475 | { q->bsize += p->bsize; |
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| 476 | q->bptr = p->bptr; |
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| 477 | } |
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| 478 | else q->bptr = p; |
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| 479 | allocp = q; |
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| 480 | } |
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| 481 | |
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| 482 | unsigned freesize() |
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| 483 | {int i; |
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| 484 | if (!heapp) initheap(); |
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| 485 | return ((char *)&i - (char *)heapp); |
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| 486 | } |
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