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- /* psutil.c
- * Copyright (C) Angus J. C. Duggan 1991-1995
- * See file LICENSE for details.
- *
- * utilities for PS programs
- */
-
- /*
- * AJCD 6/4/93
- * Changed to using ftell() and fseek() only (no length calculations)
- * Hunter Goatley 31-MAY-1993 23:33
- * Fixed VMS support.
- * Hunter Goatley 2-MAR-1993 14:41
- * Added VMS support.
- */
- #include "psutil.h"
- #include "pserror.h"
- #include "patchlev.h"
-
- #include <string.h>
- #include <sys/types.h>
- #include <sys/stat.h>
-
- #define iscomment(x,y) (strncmp(x,y,strlen(y)) == 0)
-
- extern char *program ;
- extern int pages;
- extern int verbose;
- extern FILE *infile;
- extern FILE *outfile;
- extern char pagelabel[BUFSIZ];
- extern int pageno;
-
- static char buffer[BUFSIZ];
- static long bytes = 0;
- static long pagescmt = 0;
- static long headerpos = 0;
- static long endsetup = 0;
- static long beginprocset = 0; /* start of pstops procset */
- static long endprocset = 0;
- static int outputpage = 0;
- static int maxpages = 100;
- static long *pageptr;
-
- /* list of paper sizes supported */
- static Paper papersizes[] = {
- { "a3", 842, 1191 }, /* 29.7cm * 42cm */
- { "a4", 595, 842 }, /* 21cm * 29.7cm */
- { "a5", 421, 595 }, /* 14.85cm * 21cm */
- { "b5", 516, 729 }, /* 18.2cm * 25.72cm */
- { "A3", 842, 1191 }, /* 29.7cm * 42cm */
- { "A4", 595, 842 }, /* 21cm * 29.7cm */
- { "A5", 421, 595 }, /* 14.85cm * 21cm */
- { "B5", 516, 729 }, /* 18.2cm * 25.72cm */
- { "letter", 612, 792 }, /* 8.5in * 11in */
- { "legal", 612, 1008 }, /* 8.5in * 14in */
- { "ledger", 1224, 792 }, /* 17in * 11in */
- { "tabloid", 792, 1224 }, /* 11in * 17in */
- { "statement", 396, 612 }, /* 5.5in * 8.5in */
- { "executive", 540, 720 }, /* 7.6in * 10in */
- { "folio", 612, 936 }, /* 8.5in * 13in */
- { "quarto", 610, 780 }, /* 8.5in * 10.83in */
- { "10x14", 720, 1008 }, /* 10in * 14in */
- { NULL, 0, 0 }
- };
-
- /* return pointer to paper size struct or NULL */
- Paper* findpaper(char *name)
- {
- Paper *pp;
- for (pp = papersizes; PaperName(pp); pp++) {
- if (strcmp(PaperName(pp), name) == 0) {
- return pp;
- }
- }
- return (Paper *)NULL;
- }
-
- /* make a file seekable; trick stolen from Chris Torek's libdvi */
- FILE *seekable(FILE *fp)
- {
- FILE *ft;
- long r, w;
- char *p;
- #if defined(WINNT)
- struct _stat fs ;
- #endif
-
- #if defined(WINNT)
- if (_fstat(fileno(fp), &fs) == 0 && (fs.st_mode&_S_IFREG) != 0)
- return (fp);
- #else
- if (!fseek(fp, 0L, SEEK_CUR))
- return (fp);
- #endif
-
- #if defined(MSDOS)
- message(FATAL, "input is not seekable\n");
- return (NULL) ;
- #else
- 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 (fseek(ft, 0L, SEEK_SET) != 0)
- return (NULL) ;
-
- return (ft);
- #endif
- }
-
-
- /* copy input file from current position upto new position to output file */
- static int fcopy(long upto)
- {
- long here = ftell(infile);
- while (here < upto) {
- if ((fgets(buffer, BUFSIZ, infile) == NULL) ||
- (fputs(buffer, outfile) == EOF))
- return(0);
- here = ftell(infile);
- bytes += strlen(buffer);
- }
- return (1);
- }
-
- /* build array of pointers to start/end of pages */
- void scanpages(void)
- {
- register char *comment = buffer+2;
- register int nesting = 0;
- register long int record;
-
- if ((pageptr = (long *)malloc(sizeof(long)*maxpages)) == NULL)
- message(FATAL, "out of memory\n");
- pages = 0;
- fseek(infile, 0L, SEEK_SET);
- while (record = ftell(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 = (long *)realloc((char *)pageptr,
- sizeof(long)*maxpages)) == NULL)
- message(FATAL, "out of memory\n");
- }
- pageptr[pages++] = record;
- } else if (headerpos == 0 && iscomment(comment, "Pages:"))
- pagescmt = record;
- else if (headerpos == 0 && iscomment(comment, "EndComments"))
- headerpos = ftell(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, "BeginProcSet: PStoPS"))
- beginprocset = record;
- else if (beginprocset && !endprocset &&
- iscomment(comment, "EndProcSet"))
- endprocset = ftell(infile);
- else if (nesting == 0 && iscomment(comment, "Trailer")) {
- fseek(infile, record, SEEK_SET);
- break;
- }
- } else if (headerpos == 0 && buffer[1] != '!')
- headerpos = record;
- } else if (headerpos == 0)
- headerpos = record;
- pageptr[pages] = ftell(infile);
- if (endsetup == 0 || endsetup > pageptr[0])
- endsetup = pageptr[0];
- }
-
- /* seek a particular page */
- void seekpage(int p)
- {
- fseek(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;
- }
- } 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(char *s)
- {
- fputs(s, outfile);
- bytes += strlen(s);
- }
-
- /* write page comment */
- void writepageheader(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]))
- 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)
- {
- fseek(infile, 0L, SEEK_SET);
- if (pagescmt) {
- if (!fcopy(pagescmt) || fgets(buffer, BUFSIZ, infile) == NULL)
- message(FATAL, "I/O error in header\n");
- sprintf(buffer, "%%%%Pages: %d 0\n", p);
- writestring(buffer);
- }
- if (!fcopy(headerpos))
- 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))
- message(FATAL, "I/O error in prologue\n");
- if (endprocset)
- fseek(infile, endprocset, SEEK_SET);
- writeprolog();
- return !beginprocset;
- }
-
- /* write prologue up to end of setup section */
- void writeprolog(void)
- {
- if (!fcopy(endsetup))
- message(FATAL, "I/O error in prologue\n");
- }
-
- /* write from end of setup to start of pages */
- void writesetup(void)
- {
- if (!fcopy(pageptr[0]))
- message(FATAL, "I/O error in prologue\n");
- }
-
- /* write trailer */
- void writetrailer(void)
- {
- fseek(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");
- }
-
-