147 lines
2.9 KiB
C
147 lines
2.9 KiB
C
/* mkindex
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*
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* Copy named files or standard input (if no arguments are given) to
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* standard output, replacing @[something] by troff macro calls.
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*
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* These replacements are performed:
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*
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* @[.something] --> \n.Ix "something"\nsomething
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* @[!something] --> \n.Id "something"\nsomething
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*
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* @[.some|thing] --> \n.Ix "thing, some"\nsome thing
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* @[!some|thing] --> \n.Id "thing, some"\nsome thing
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*
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* @[.=something] --> \n.Ix "something"\n
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* @[!=something] --> \n.Id "something"\n
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*
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*
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* 1) initial \n is omitted at the beginning of an output line
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*
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* 2) initial \n is prefixed by \c if @[ follows "(" in input
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*
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* 3) omit final \n if @[...] is at end of input line
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*
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* 4) within @[...], \] is replaced by ]
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*
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* 5) in the macro argument ("something"), all sequences of the form
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* `` or '' or \fX or \% are removed
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*/
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#include <stdio.h>
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char *index();
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char buf[10000];
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long line;
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char *fn;
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main(ac, av) char **av; {
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FILE *fp;
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if (ac < 2) {
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fn = "stdin";
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doit(stdin);
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} else {
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while (--ac > 0) {
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fn = *++av;
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if ((fp = fopen(fn, "r")) == 0) {
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perror(fn); exit(1);
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}
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doit(fp);
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fclose(fp);
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}
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}
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return 0;
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}
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doit(fp) FILE *fp; {
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char *p, *q, *start, *macro;
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char inx[1000], arg[1000];
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int n, need_nl = 0;
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line = 1;
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while (fgets(buf, 10000, fp) != NULL) {
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if (p = index(buf, '\n'))
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*p = 0;
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p = buf;
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while (*p) {
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if (*p == '@' && p[1] == '[') {
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start = p;
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p += 2;
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switch (*p) {
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case '.':
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macro = "Ix"; break;
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case '!':
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macro = "Id"; break;
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case 0:
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error("index truncated");
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default:
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error("invalid index type");
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}
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p++;
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q = inx;
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while (*p != ']') {
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if (*p == 0)
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error("missing ]");
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if (*p == '\\' && p[1] == ']')
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p++;
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*q++ = *p++;
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}
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if (q == inx)
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error("empty index");
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*q = 0;
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eatfont(inx, arg);
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if (start > buf && start[-1] == '(')
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printf("\\c");
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if (need_nl)
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putchar('\n');
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printf(".%s ", macro);
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p++;
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if (arg[0] == '=') {
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printf("\"%s\"", arg+1);
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if (*p) {
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putchar('\n');
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need_nl = 0;
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if (*p == ' ')
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p++;
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}
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} else if (q = index(arg, '|')) {
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*q = 0; q++;
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printf("\"%s, %s\"\n%s %s", q, arg, arg, q);
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need_nl = 1;
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} else {
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printf("\"%s\"\n%s", arg, inx);
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need_nl = 1;
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}
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} else {
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putchar(*p);
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need_nl = 1;
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p++;
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}
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}
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putchar('\n');
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need_nl = 0;
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line++;
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}
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}
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eatfont(from, to) char *from, *to; {
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while (*from) {
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if (*from == '\\' && from[1] == 'f' && from[2]) {
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from += 3;
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} else if (*from == '\'' && from[1] == '\'') {
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from += 2;
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} else if (*from == '`' && from[1] == '`') {
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from += 2;
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} else if (*from == '\\' && from[1] == '%') {
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from += 2;
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} else *to++ = *from++;
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}
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*to = 0;
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}
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error(s) char *s; {
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fprintf(stderr, "Error in %s line %d, %s:\n%s\n", fn, line, s, buf);
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exit(1);
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}
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