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/*
( cd cdrskin ; cc -g -Wall -o unite_html_b_line unite_html_b_line.c )
*/
/*
Specialized converter for the output of man -H,
which unites lines where the line end is between <b> and </b>.
Copyright 2015 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>
int unite_lines(char *buffer, int *b_open, int *b_state, int flag)
{
char *cpt;
int last_was_nl= 0;
for(cpt= buffer; *cpt != 0; cpt++) {
if(*b_open) {
if(*b_state == 0 && *cpt == '<') {
*b_state= 1;
} else if(*b_state == 1) {
if(*cpt == '/')
*b_state= 2;
else
*b_state= 0;
} else if(*b_state == 2) {
if(*cpt == 'b' || *cpt == 'B')
*b_state= 3;
else
*b_state= 0;
} else if(*b_state == 3) {
if(*cpt == '>')
*b_open= 0;
*b_state= 0;
}
} else {
if(*b_state == 0 && *cpt == '<') {
*b_state= 1;
} else if(*b_state == 1) {
if(*cpt == 'b' || *cpt == 'B')
*b_state= 2;
else
*b_state= 0;
} else if(*b_state == 2) {
if(*cpt == '>')
*b_open= 1;
*b_state= 0;
}
}
last_was_nl= (*cpt == '\n');
}
if(*b_open && last_was_nl) {
/* replace newline */
*(cpt - 1)= ' ';
}
return(1);
}
int main(int argc, char **argv)
{
FILE *fpin, *fpout;
char buffer[4096], *respt;
int ret, b_open= 0, b_state= 0;
if(argc != 3) {
fprintf(stderr, "usage: %s input_path output_path\n", argv[0]);
return(1);
}
if(strcmp(argv[1], "-") == 0) {
fpin= stdin;
} else {
fpin= fopen(argv[1], "rb");
if(fpin == 0) {
fprintf(stderr, "Error with input file '%s' : %s\n",
argv[1], strerror(errno));
return(2);
}
}
if(strcmp(argv[2], "-") == 0) {
fpout= stdout;
} else {
fpout= fopen(argv[2], "wb");
if(fpout == 0) {
fprintf(stderr, "Error with output file '%s' : %s\n",
argv[2], strerror(errno));
return(3);
}
}
while(1) {
respt= fgets(buffer, sizeof(buffer), fpin);
if(respt == NULL)
break;
ret= unite_lines(buffer, &b_open, &b_state, 0);
if(ret <= 0)
break;
ret= fputs(buffer, fpout);
if(ret < 0) {
fprintf(stderr, "Error writing to output file '%s' : %s\n",
argv[2], strerror(errno));
return(4);
}
}
if(fpin != stdin)
fclose(fpin);
if(fpout != stdout)
fclose(stdout);
return(0);
}