| 1 | /* prep - prepare file for statistics Author: Andy Tanenbaum */
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| 2 |
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| 3 | #include <ctype.h>
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| 4 | #include <stdlib.h>
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| 5 | #include <stdio.h>
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| 6 |
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| 7 | #define TROFF_CHAR '.' /* troff commands begin with this char */
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| 8 | #define EOL '\n' /* end of line char */
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| 9 | #define APOSTROPHE 047 /* single quote */
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| 10 | #define BACKSLASH '\\' /* troff code */
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| 11 |
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| 12 | int lfread; /* set when last char read was lf */
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| 13 | int lfwritten = 1; /* set when last char written was lf */
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| 14 |
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| 15 | _PROTOTYPE(int main, (int argc, char **argv));
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| 16 | _PROTOTYPE(void skipline, (void));
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| 17 | _PROTOTYPE(int backslash, (void));
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| 18 | _PROTOTYPE(void usage, (void));
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| 19 |
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| 20 | int main(argc, argv)
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| 21 | int argc;
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| 22 | char *argv[];
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| 23 | {
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| 24 |
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| 25 | int c;
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| 26 |
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| 27 | if (argc > 2) usage();
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| 28 | if (argc == 2) {
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| 29 | if (freopen(argv[1], "r", stdin) == NULL) {
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| 30 | printf("prep: cannot open %s\n", argv[1]);
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| 31 | exit(1);
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| 32 | }
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| 33 | }
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| 34 | while ((c = getchar()) != EOF) {
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| 35 | /* Lines beginning with "." are troff commands -- skip them. */
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| 36 | if (lfread && c == TROFF_CHAR) {
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| 37 | skipline();
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| 38 | continue;
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| 39 | }
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| 40 | while (c == BACKSLASH) c = backslash(); /* eat troff stuff */
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| 41 |
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| 42 | if (isupper(c)) {
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| 43 | putchar(tolower(c));
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| 44 | lfwritten = 0;
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| 45 | lfread = 0;
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| 46 | continue;
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| 47 | }
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| 48 | if (islower(c)) {
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| 49 | putchar(c);
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| 50 | lfwritten = 0;
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| 51 | lfread = 0;
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| 52 | continue;
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| 53 | }
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| 54 | if (c == APOSTROPHE) {
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| 55 | putchar(c);
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| 56 | lfwritten = 0;
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| 57 | lfread = 0;
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| 58 | continue;
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| 59 | }
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| 60 | lfread = (c == EOL ? 1 : 0);
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| 61 | if (lfwritten) continue;
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| 62 | putchar(EOL);
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| 63 | lfwritten = 1;
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| 64 | }
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| 65 | return(0);
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| 66 | }
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| 67 |
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| 68 |
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| 69 | void skipline()
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| 70 | {
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| 71 | char c;
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| 72 |
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| 73 | while ((c = getchar()) != EOL);
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| 74 | }
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| 75 |
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| 76 |
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| 77 | int backslash()
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| 78 | {
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| 79 | /* A backslash has been seen. Eat troff stuff. */
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| 80 |
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| 81 | int c, c1, c2;
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| 82 |
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| 83 | c = getchar();
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| 84 | switch (c) {
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| 85 | case 'f':
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| 86 | c = getchar();
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| 87 | c = getchar();
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| 88 | return(c);
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| 89 |
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| 90 | case 's': /* \s7 or \s14 */
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| 91 | c = getchar();
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| 92 | c = getchar();
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| 93 | if (isdigit(c)) c = getchar();
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| 94 | return(c);
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| 95 |
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| 96 | case 'n': /* \na or \n(xx */
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| 97 | c = getchar();
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| 98 | if (c == '(') {
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| 99 | c = getchar();
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| 100 | c = getchar();
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| 101 | }
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| 102 | c = getchar();
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| 103 | return(c);
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| 104 |
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| 105 | case '*': /* / * (XX */
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| 106 | c = getchar();
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| 107 | if (c == '(') {
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| 108 | c = getchar();
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| 109 | c = getchar();
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| 110 | c = getchar();
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| 111 | return(c);
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| 112 | }
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| 113 |
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| 114 | case '(': /* troff 4-character escape sequence */
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| 115 | c1 = getchar();
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| 116 | c2 = getchar();
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| 117 | if (c1 == 'e' && c2 == 'm') return(' ');
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| 118 | if (c1 == 'e' && c2 == 'n') return(' ');
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| 119 | c = getchar();
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| 120 | return(c);
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| 121 |
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| 122 | case '%': /* soft hyphen: \% */
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| 123 | c = getchar();
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| 124 | return(c);
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| 125 |
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| 126 | default:
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| 127 | return(c);
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| 128 |
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| 129 | }
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| 130 | }
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| 131 |
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| 132 | void usage()
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| 133 | {
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| 134 | printf("Usage: prep [file]\n");
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| 135 | exit(1);
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| 136 | }
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