330 lines
7.6 KiB
C
330 lines
7.6 KiB
C
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/*
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( cd xorriso ; cc -g -Wall -o make_xorriso_1 make_xorriso_1.c )
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*/
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/*
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Specialized converter from xorriso/xorriso.texi to xorriso/xorriso.1.
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The conversion rules are described at the beginning of xorriso/xorriso.texi
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Copyright 2010 Thomas Schmitt, <scdbackup@gmx.net>
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Provided under GPL version 2 or later.
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*/
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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/* The conversion state
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*/
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struct Mx1 {
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char prog[4096];
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int count_in;
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int count_out;
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int skipping; /* <0 stacked skipping , 0= no , >0 counting down */
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};
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int Mx1_init(struct Mx1 *m, char *prog, int flag)
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{
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strncpy(m->prog, prog, sizeof(m->prog) - 1);
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m->prog[sizeof(m->prog) - 1]= 0;
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m->count_in= 0;
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m->count_out= 0;
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m->skipping= 0;
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return(1);
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}
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int Mx1_report_error(struct Mx1 *m, char *text, int flag)
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{
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fprintf(stderr, "%s : line %d : %s\n", m->prog, m->count_in, text);
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return(1);
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}
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int Mx1__get_word(char *line, char word[256], char **remainder, int flag)
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{
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char *cpt, *start;
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int l;
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word[0]= 0;
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*remainder= NULL;
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for(cpt= line; *cpt != 0 && isspace(*cpt); cpt++);
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if(*cpt == 0)
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return(0);
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start= cpt;
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for(cpt= line; *cpt != 0 && ! isspace(*cpt); cpt++);
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l= cpt - start;
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if(l > 0)
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strncpy(word, start, l);
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word[l]= 0;
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*remainder= cpt;
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return(1);
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}
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int Mx1_substitute(struct Mx1 *m, char line_in[256], char line_out[256],
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int raw, int flag)
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{
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char *rpt, *wpt, *ept;
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int l;
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wpt= line_out;
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for(rpt= line_in; *rpt != 0; rpt++) {
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if(rpt - line_in < raw) {
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*(wpt++)= *rpt;
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continue;
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}
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if(*rpt == '@') {
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if(strncmp(rpt, "@strong{", 8) == 0) {
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/* @strong{-...} gets mapped to \fB\-...\fR . */;
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/* @strong{... } gets mapped to \fB...\fR . */
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ept= strchr(rpt, '}');
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if(ept == NULL) {
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Mx1_report_error(m, "No closing bracket found for '@strong{'", 0);
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return(-1);
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}
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l= ept - rpt - 8;
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if((wpt - line_out) + l + 6 + (rpt[8] == '-') > 255)
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goto overflow;
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strcpy(wpt, "\\fB");
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wpt+= 3;
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if(rpt[8] == '-')
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*(wpt++)= '\\';
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strncpy(wpt, rpt + 8, l);
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wpt+= l;
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strcpy(wpt, "\\fR");
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wpt+= 3;
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rpt+= ept - rpt;
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} else if(strncmp(rpt, "@minus{}", 8) == 0) {
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/* @minus{} will become "-". */
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if((wpt - line_out) + 1 > 255)
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goto overflow;
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*(wpt++)= '-';
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rpt+= 7;
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} else if(strncmp(rpt, "@@", 2) == 0 ||
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strncmp(rpt, "@{", 2) == 0 ||
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strncmp(rpt, "@}", 2) == 0) {
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/* @@ , @{, @} will get stripped of their first @. */
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*(wpt++)= *(rpt + 1);
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rpt++;
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}
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} else if(*rpt == '\\') {
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/* "\" becomes "\\" */
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if((wpt - line_out) + 2 > 255)
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goto overflow;
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*(wpt++)= '\\';
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*(wpt++)= '\\';
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} else if((wpt - line_out) + 1 > 255) {
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overflow:;
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Mx1_report_error(m, "Line length overflow while text substitution", 0);
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return(-1);
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} else
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*(wpt++)= *rpt;
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}
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*wpt= 0;
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return(1);
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}
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/*
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@return 1= line_out is valid, 0= do not put out line_out, -1 = error
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*/
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int Mx1_convert(struct Mx1 *m, char line_in[256], char line_out[256], int flag)
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{
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int l, num, keep= 0, ret, raw;
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char word[256], buf[256], *remainder;
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m->count_in++;
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l= strlen(line_in);
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if(m->skipping > 0) {
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m->skipping--;
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return(0);
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}
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/* The first line gets discarded. */
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if(m->count_in == 1)
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return(0);
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/* Line start "@c man " will become "", the remainder is put out unaltered. */
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if(strncmp(line_in, "@c man ", 7) == 0) {
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strcpy(line_out, line_in + 7);
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m->count_out++;
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return(1);
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}
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/* Lines "@*" will be converted to ".br" */
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if(strcmp(line_in, "@*") == 0) {
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strcpy(line_out, ".br");
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m->count_out++;
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return(1);
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}
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/* @c man-ignore-lines N will discard N following lines.
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"@c man-ignore-lines begin" discards all following lines
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up to "@c man-ignore-lines end".
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*/
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if(strncmp(line_in, "@c man-ignore-lines ", 20) == 0) {
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if(strcmp(line_in + 20, "begin") == 0) {
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m->skipping--;
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return(0);
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} else if(strcmp(line_in + 20, "end") == 0) {
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if(m->skipping < 0)
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m->skipping++;
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return(0);
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} else if(m->skipping == 0) {
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num= 0;
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sscanf(line_in + 20, "%d", &num);
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if(num > 0) {
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m->skipping= num;
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return(0);
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}
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}
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Mx1_report_error(m, "Inappropriate use of '@c man-ignore-lines'", 0);
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return(-1);
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}
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/* Line blocks of "@menu" "@end menu" will be discarded. */
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if(strcmp(line_in, "@menu") == 0) {
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m->skipping--;
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return(0);
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}
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if(strcmp(line_in, "@end menu") == 0) {
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if(m->skipping < 0)
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m->skipping++;
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return(0);
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}
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if(m->skipping)
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return(0);
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/* "@item -word words" becomes "\fB\-word\fR words". */
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/* "@item word words" becomes "\fBword\fR words". */
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if(strncmp(line_in, "@item ", 6) == 0) {
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ret= Mx1__get_word(line_in + 6, word, &remainder, 0);
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if(ret <= 0) {
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Mx1_report_error(m, "Found no word after @item", 0);
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return(0);
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}
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strcpy(buf, "\\fB");
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if(word[0] == '-') {
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if(l >= 255) {
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Mx1_report_error(m, "Line length overflow while converting @item", 0);
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return(-1);
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}
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strcat(buf, "\\");
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}
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strcat(buf, word);
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strcat(buf, "\\fR");
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raw= strlen(buf);
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strcat(buf, remainder);
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ret= Mx1_substitute(m, buf, line_out, raw, 0);
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if(ret <= 0)
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return(-1);
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m->count_out++;
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return(1);
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}
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/* @strong{-...} gets mapped to \fB\-...\fR . */
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/* @strong{... } gets mapped to \fB...\fR . */
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/* @minus{} will become "-". */
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/* @@ , @{, @} will get stripped of their first @. */
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/* "\" becomes "\\" */
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if(line_in[0] != '@' ||
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strncmp(line_in, "@strong{", 8) == 0 ||
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strncmp(line_in, "@minus{}", 8) == 0 ||
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strncmp(line_in, "@@", 2) == 0 ||
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strncmp(line_in, "@{", 2) == 0 ||
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strncmp(line_in, "@}", 2) == 0) {
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keep= 1;
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ret= Mx1_substitute(m, line_in, line_out, 0, 0);
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if(ret <= 0)
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return(-1);
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}
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/* Other lines which begin by "@" will be discarded. */
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if(! keep) {
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if(line_in[0] == '@')
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return(0);
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strcpy(line_out, line_in);
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}
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m->count_out++;
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return(1);
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}
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int main(int argc, char **argv)
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{
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int ret, l, as_filter= 0, i;
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char line_in[256], line_out[256], *got;
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static char name_in[]= {"xorriso/xorriso.texi"};
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static char name_out[]= {"xorriso/xorriso.1"};
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struct Mx1 m;
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FILE *fp_in= stdin, *fp_out= stdout;
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Mx1_init(&m, argv[0], 0);
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if(argc < 2) {
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usage:;
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fprintf(stderr, "usage: %s -auto|-filter\n", argv[0]);
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fprintf(stderr, " -auto xorriso/xorriso.texi -> xorriso/xorriso.1\n");
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fprintf(stderr, " -filter stdin -> stdout\n");
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exit(2);
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}
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for(i= 1; i < argc; i++) {
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if(strcmp(argv[i], "-filter") == 0)
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as_filter= 1;
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else if(strcmp(argv[i], "-auto") == 0)
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as_filter= 0;
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else {
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fprintf(stderr, "%s : unknown option %s\n", argv[0], argv[i]);
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goto usage;
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}
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}
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if(!as_filter) {
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fp_in= fopen(name_in, "r");
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if(fp_in == NULL) {
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fprintf(stderr, "%s : failed to fopen( %s ,r) : %d %s\n",
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argv[0], name_in, errno, strerror(errno));
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exit(3);
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}
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fp_out= fopen(name_out, "w");
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if(fp_out == NULL) {
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fprintf(stderr, "%s : failed to fopen( %s ,w) : %d %s\n",
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argv[0], name_out, errno, strerror(errno));
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exit(4);
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}
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}
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while(1) {
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got= fgets(line_in, sizeof(line_in), fp_in);
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if(got == NULL)
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break;
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l= strlen(line_in);
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while(l > 0) {
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if(line_in[l - 1] == '\r' || line_in[l - 1] == '\n') {
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line_in[l - 1] = 0;
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l--;
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} else
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break;
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}
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ret= Mx1_convert(&m, line_in, line_out, 0);
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if(ret < 0)
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exit(1);
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if(ret == 0)
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continue;
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fprintf(fp_out, "%s\n", line_out);
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}
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exit(0);
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}
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