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/* psutil.c
* PSUtils utility functions
*
* (c) Reuben Thomas 2012
* (c) Angus J. C. Duggan 1991-1997
* See file LICENSE for details.
*/
#include "config.h"
#define _FILE_OFFSET_BITS 64
#include "psutil.h"
#include "psspec.h"
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <paper.h>
#define iscomment(x,y) (strncmp(x,y,strlen(y)) == 0)
char *program;
int pages;
int verbose;
FILE *infile;
FILE *outfile;
char pagelabel[BUFSIZ];
int pageno;
static char buffer[BUFSIZ];
static long bytes = 0;
static off_t pagescmt = 0;
static off_t headerpos = 0;
static off_t endsetup = 0;
static off_t beginprocset = 0; /* start of pstops procset */
static off_t endprocset = 0;
static int outputpage = 0;
static int maxpages = 100;
static off_t *pageptr;
_Noreturn void usage(void)
{
fprintf(stderr, "%s %s\n", program, PACKAGE_VERSION);
fprintf(stderr, COPYRIGHT_STRING);
fprintf(stderr, "Usage: %s %s", program, syntax);
fflush(stderr);
exit(1);
}
void argerror(void)
{
message(FATAL, argerr_message);
}
/* Message function: for messages, warnings, and errors sent to stderr.
If called with the flag MESSAGE_EXIT set, the routine does not return. */
void message(int flags, const char *format, ...)
{
va_list args ;
if ( flags & MESSAGE_PROGRAM )
fprintf(stderr, "%s: ", program) ;
if ( (flags & MESSAGE_NL) )
putc('\n', stderr) ;
va_start(args, format) ;
vfprintf(stderr, format, args);
va_end(args) ;
if ( flags & MESSAGE_EXIT ) /* don't return to program */
exit(1) ;
}
static void maybe_init_libpaper(void)
{
static int libpaper_initted = 0;
if (!libpaper_initted) {
paperinit();
libpaper_initted = 1;
}
}
void set_paper_size(const char *paper_name)
{
const struct paper *paper = get_paper(paper_name);
if (paper) {
width = paperpswidth(paper);
height = paperpsheight(paper);
}
}
const struct paper *get_paper(const char *paper_name)
{
maybe_init_libpaper();
if (paper_name == NULL)
paper_name = systempapername();
if (paper_name)
return paperinfo(paper_name);
return NULL;
}
/* Make a file seekable, using temporary files if necessary */
FILE *seekable(FILE *fp)
{
FILE *ft;
long r, w ;
char *p;
char buffer[BUFSIZ] ;
off_t fpos;
if ((fpos = ftello(fp)) >= 0)
if (!fseeko(fp, (off_t) 0, SEEK_END) && !fseeko(fp, fpos, SEEK_SET))
return (fp);
if ((ft = tmpfile()) == NULL)
return (NULL);
while ((r = fread(p = buffer, sizeof(char), BUFSIZ, fp)) > 0) {
do {
if ((w = fwrite(p, sizeof(char), r, ft)) == 0)
return (NULL) ;
p += w ;
r -= w ;
} while (r > 0) ;
}
if (!feof(fp))
return (NULL) ;
/* discard the input file, and rewind the temporary */
(void) fclose(fp);
if (fseeko(ft, (off_t) 0, SEEK_SET) != 0)
return (NULL) ;
return (ft);
}
/* copy input file from current position upto new position to output file,
* ignoring the lines starting at something ignorelist points to */
static int fcopy(off_t upto, off_t *ignorelist)
{
off_t here = ftello(infile);
off_t bytes_left;
if (ignorelist != NULL) {
while (*ignorelist > 0 && *ignorelist < here)
ignorelist++;
while (*ignorelist > 0 && *ignorelist < upto) {
int r = fcopy(*ignorelist, NULL);
if (!r || fgets(buffer, BUFSIZ, infile) == NULL)
return 0;
ignorelist++;
here = ftello(infile);
while (*ignorelist > 0 && *ignorelist < here)
ignorelist++;
}
}
bytes_left = upto - here;
while (bytes_left > 0) {
size_t rw_result;
const size_t numtocopy = (bytes_left > BUFSIZ) ? BUFSIZ : bytes_left;
rw_result = fread(buffer, 1, numtocopy, infile);
if (rw_result < numtocopy) return (0);
rw_result = fwrite(buffer, 1, numtocopy, outfile);
if (rw_result < numtocopy) return (0);
bytes_left -= numtocopy;
bytes += numtocopy;
}
return (1);
}
/* build array of pointers to start/end of pages */
void scanpages(off_t *sizeheaders)
{
register char *comment = buffer+2;
register int nesting = 0;
register off_t record;
if (sizeheaders)
*sizeheaders = 0;
if ((pageptr = (off_t *)malloc(sizeof(off_t)*maxpages)) == NULL)
message(FATAL, "out of memory\n");
pages = 0;
fseeko(infile, (off_t) 0, SEEK_SET);
while (record = ftello(infile), fgets(buffer, BUFSIZ, infile) != NULL)
if (*buffer == '%') {
if (buffer[1] == '%') {
if (nesting == 0 && iscomment(comment, "Page:")) {
if (pages >= maxpages-1) {
maxpages *= 2;
if ((pageptr = (off_t *)realloc((char *)pageptr,
sizeof(off_t)*maxpages)) == NULL)
message(FATAL, "out of memory\n");
}
pageptr[pages++] = record;
} else if (headerpos == 0 && iscomment(comment, "BoundingBox:")) {
if (sizeheaders) {
*(sizeheaders++) = record;
*sizeheaders = 0;
}
} else if (headerpos == 0 && iscomment(comment, "HiResBoundingBox:")) {
if (sizeheaders) {
*(sizeheaders++) = record;
*sizeheaders = 0;
}
} else if (headerpos == 0 && iscomment(comment,"DocumentPaperSizes:")) {
if (sizeheaders) {
*(sizeheaders++) = record;
*sizeheaders = 0;
}
} else if (headerpos == 0 && iscomment(comment,"DocumentMedia:")) {
if (sizeheaders) {
*(sizeheaders++) = record;
*sizeheaders = 0;
}
} else if (headerpos == 0 && iscomment(comment, "Pages:"))
pagescmt = record;
else if (headerpos == 0 && iscomment(comment, "EndComments"))
headerpos = ftello(infile);
else if (iscomment(comment, "BeginDocument") ||
iscomment(comment, "BeginBinary") ||
iscomment(comment, "BeginFile"))
nesting++;
else if (iscomment(comment, "EndDocument") ||
iscomment(comment, "EndBinary") ||
iscomment(comment, "EndFile"))
nesting--;
else if (nesting == 0 && iscomment(comment, "EndSetup"))
endsetup = record;
else if (nesting == 0 && iscomment(comment, "BeginProlog"))
headerpos = ftello(infile);
else if (nesting == 0 &&
iscomment(comment, "BeginProcSet: PStoPS"))
beginprocset = record;
else if (beginprocset && !endprocset &&
iscomment(comment, "EndProcSet"))
endprocset = ftello(infile);
else if (nesting == 0 && (iscomment(comment, "Trailer") ||
iscomment(comment, "EOF"))) {
fseeko(infile, record, SEEK_SET);
break;
}
} else if (headerpos == 0 && buffer[1] != '!')
headerpos = record;
} else if (headerpos == 0)
headerpos = record;
pageptr[pages] = ftello(infile);
if (endsetup == 0 || endsetup > pageptr[0])
endsetup = pageptr[0];
}
/* seek a particular page */
void seekpage(int p)
{
fseeko(infile, pageptr[p], SEEK_SET);
if (fgets(buffer, BUFSIZ, infile) != NULL &&
iscomment(buffer, "%%Page:")) {
char *start, *end;
for (start = buffer+7; isspace(*start); start++);
if (*start == '(') {
int paren = 1;
for (end = start+1; paren > 0; end++)
switch (*end) {
case '\0':
message(FATAL, "Bad page label while seeking page %d\n", p);
case '(':
paren++;
break;
case ')':
paren--;
break;
default:
break;
}
} else
for (end = start; !isspace(*end); end++);
strncpy(pagelabel, start, end-start);
pagelabel[end-start] = '\0';
pageno = atoi(end);
} else
message(FATAL, "I/O error seeking page %d\n", p);
}
/* Output routines. These all update the global variable bytes with the number
* of bytes written */
void writestring(const char *s)
{
fputs(s, outfile);
bytes += strlen(s);
}
/* write page comment */
void writepageheader(const char *label, int page)
{
if (verbose)
message(LOG, "[%d] ", page);
sprintf(buffer, "%%%%Page: %s %d\n", label, ++outputpage);
writestring(buffer);
}
/* search for page setup */
void writepagesetup(void)
{
char buffer[BUFSIZ];
if (beginprocset) {
for (;;) {
if (fgets(buffer, BUFSIZ, infile) == NULL)
message(FATAL, "I/O error reading page setup %d\n", outputpage);
if (!strncmp(buffer, "PStoPSxform", 11))
break;
if (fputs(buffer, outfile) == EOF)
message(FATAL, "I/O error writing page setup %d\n", outputpage);
bytes += strlen(buffer);
}
}
}
/* write the body of a page */
void writepagebody(int p)
{
if (!fcopy(pageptr[p+1], NULL))
message(FATAL, "I/O error writing page %d\n", outputpage);
}
/* write a whole page */
void writepage(int p)
{
seekpage(p);
writepageheader(pagelabel, p+1);
writepagebody(p);
}
/* write from start of file to end of header comments */
void writeheader(int p, off_t *ignore)
{
writeheadermedia(p, ignore, -1, -1);
}
void writeheadermedia(int p, off_t *ignore, double width, double height)
{
fseeko(infile, (off_t) 0, SEEK_SET);
if (pagescmt) {
if (!fcopy(pagescmt, ignore) || fgets(buffer, BUFSIZ, infile) == NULL)
message(FATAL, "I/O error in header\n");
if (width > -1 && height > -1) {
sprintf(buffer, "%%%%DocumentMedia: plain %d %d 0 () ()\n", (int) width, (int) height);
writestring(buffer);
sprintf(buffer, "%%%%BoundingBox: 0 0 %d %d\n", (int) width, (int) height);
writestring(buffer);
}
sprintf(buffer, "%%%%Pages: %d 0\n", p);
writestring(buffer);
}
if (!fcopy(headerpos, ignore))
message(FATAL, "I/O error in header\n");
}
/* write prologue to end of setup section excluding PStoPS procset */
int writepartprolog(void)
{
if (beginprocset && !fcopy(beginprocset, NULL))
message(FATAL, "I/O error in prologue\n");
if (endprocset)
fseeko(infile, endprocset, SEEK_SET);
writeprolog();
return !beginprocset;
}
/* write prologue up to end of setup section */
void writeprolog(void)
{
if (!fcopy(endsetup, NULL))
message(FATAL, "I/O error in prologue\n");
}
/* write from end of setup to start of pages */
void writesetup(void)
{
if (!fcopy(pageptr[0], NULL))
message(FATAL, "I/O error in prologue\n");
}
/* write trailer */
void writetrailer(void)
{
fseeko(infile, pageptr[pages], SEEK_SET);
while (fgets(buffer, BUFSIZ, infile) != NULL) {
writestring(buffer);
}
if (verbose)
message(LOG, "Wrote %d pages, %ld bytes\n", outputpage, bytes);
}
/* write a page with nothing on it */
void writeemptypage(void)
{
if (verbose)
message(LOG, "[*] ");
sprintf(buffer, "%%%%Page: * %d\n", ++outputpage);
writestring(buffer);
if (beginprocset)
writestring("PStoPSxform concat\n");
writestring("showpage\n");
}
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