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libisoburn/xorriso/make_xorriso_1.c

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