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/* psselect.c
* Copyright (C) Angus J. C. Duggan 1991-1995
* See file LICENSE for details.
*
* rearrange pages in conforming PS file for printing in signatures
*
* Usage:
* psselect [-q] [-e] [-o] [-r] [-p<pages>] [infile [outfile]]
*/
#include "psutil.h"
#include "pserror.h"
#include "patchlev.h"
char *program ;
int pages ;
int verbose ;
FILE *infile ;
FILE *outfile ;
char pagelabel[BUFSIZ] ;
int pageno ;
static void usage(void)
{
fprintf(stderr, "%s release %d patchlevel %d\n", program, RELEASE, PATCHLEVEL);
fprintf(stderr, "Copyright (C) Angus J. C. Duggan, 1991-1995. See file LICENSE for details.\n");
fprintf(stderr,
"Usage: %s [-q] [-e] [-o] [-r] [-p<pages>] [infile [outfile]]\n",
program);
fflush(stderr);
exit(1);
}
typedef struct pgrange {
int first, last;
struct pgrange *next;
} PageRange ;
static PageRange *makerange(int beg, int end, PageRange *next)
{
PageRange *new;
if ((new = (PageRange *)malloc(sizeof(PageRange))) == NULL)
message(FATAL, "out of memory\n");
new->first = beg;
new->last = end;
new->next = next;
return (new);
}
static PageRange *addrange(char *str, PageRange *rp)
{
int first=0;
int sign;
sign = (*str == '_' && ++str) ? -1 : 1;
if (isdigit(*str)) {
first = sign*atoi(str);
while (isdigit(*str)) str++;
}
switch (*str) {
case '\0':
if (first || sign < 0)
return (makerange(first, first, rp));
break;
case ',':
if (first || sign < 0)
return (addrange(str+1, makerange(first, first, rp)));
break;
case '-':
case ':':
str++;
sign = (*str == '_' && ++str) ? -1 : 1;
if (!first)
first = 1;
if (isdigit(*str)) {
int last = sign*atoi(str);
while (isdigit(*str)) str++;
switch (*str) {
case '\0':
return (makerange(first, last, rp));
case ',':
return (addrange(str+1, makerange(first, last, rp)));
}
} else if (*str == '\0')
return (makerange(first, -1, rp));
else if (*str == ',')
return (addrange(str+1, makerange(first, -1, rp)));
}
message(FATAL, "invalid page range\n");
return (PageRange *)0 ;
}
int main(int argc, char *argv[])
{
int currentpg, maxpage = 0;
int even = 0, odd = 0, reverse = 0;
int pass, all;
PageRange *pagerange = NULL;
infile = stdin;
outfile = stdout;
verbose = 1;
for (program = *argv++; --argc; argv++) {
if (argv[0][0] == '-') {
switch (argv[0][1]) {
case 'e': /* even pages */
even = 1;
break;
case 'o': /* odd pages */
odd = 1;
break;
case 'r': /* reverse */
reverse = 1;
break;
case 'p': /* page spec */
pagerange = addrange(*argv+2, pagerange);
break;
case 'q': /* quiet */
verbose = 0;
break;
case 'v': /* version */
default:
usage();
}
} else if (pagerange == NULL && !reverse && !even && !odd) {
pagerange = addrange(*argv, NULL);
} else if (infile == stdin) {
if ((infile = fopen(*argv, OPEN_READ)) == NULL)
message(FATAL, "can't open input file %s\n", *argv);
} else if (outfile == stdout) {
if ((outfile = fopen(*argv, OPEN_WRITE)) == NULL)
message(FATAL, "can't open output file %s\n", *argv);
} else usage();
}
#if defined(MSDOS) || defined(WINNT) || defined(WIN32)
if ( infile == stdin ) {
int fd = fileno(stdin) ;
if ( setmode(fd, O_BINARY) < 0 )
message(FATAL, "can't open input file %s\n", argv[4]);
}
if ( outfile == stdout ) {
int fd = fileno(stdout) ;
if ( setmode(fd, O_BINARY) < 0 )
message(FATAL, "can't reset stdout to binary mode\n");
}
#endif
if ((infile=seekable(infile))==NULL)
message(FATAL, "can't seek input\n");
scanpages();
/* select all pages or all in range if odd or even not set */
all = !(odd || even);
/* add default page range */
if (!pagerange)
pagerange = makerange(1, -1, NULL);
/* reverse page list if not reversing pages (list constructed bottom up) */
if (!reverse) {
PageRange *revlist = NULL;
PageRange *next = NULL;
while (pagerange) {
next = pagerange->next;
pagerange->next = revlist;
revlist = pagerange;
pagerange = next;
}
pagerange = revlist;
} else { /* swap start & end if reversing */
PageRange *r;
for (r = pagerange; r; r = r->next) {
int temp = r->last;
r->last = r->first;
r->first = temp;
}
}
{ /* adjust for end-relative pageranges */
PageRange *r;
for (r = pagerange; r; r = r->next) {
if (r->first < 0) {
r->first += pages + 1;
if (r->first < 1)
r->first = 1;
}
if (r->last < 0) {
r->last += pages + 1;
if (r->last < 1)
r->last = 1;
}
}
}
/* count pages on first pass, select pages on second pass */
for (pass = 0; pass < 2; pass++) {
PageRange *r;
if (pass) { /* write header on second pass */
writeheader(maxpage);
writeprolog();
writesetup();
}
for (r = pagerange; r; r = r->next) {
if (r->last < r->first) {
for (currentpg = r->first; currentpg >= r->last; currentpg--) {
if (currentpg == 0 ||
(currentpg <= pages &&
((currentpg&1) ? (odd || all) : (even || all)))) {
if (pass) {
if (currentpg)
writepage(currentpg-1);
else
writeemptypage() ;
} else
maxpage++;
}
}
} else {
for (currentpg = r->first; currentpg <= r->last; currentpg++) {
if (currentpg == 0 ||
(currentpg <= pages &&
((currentpg&1) ? (odd || all) : (even || all)))) {
if (pass) {
if (currentpg)
writepage(currentpg-1);
else
writeemptypage() ;
} else
maxpage++;
}
}
}
}
}
writetrailer();
return 0;
}
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