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/*
* ps.c -- Postscript scanning and copying routines.
* Copyright (C) 1992 Timothy O. Theisen
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Author: Tim Theisen Systems Programmer
* Internet: [email protected] Department of Computer Sciences
* UUCP: uwvax!tim University of Wisconsin-Madison
* Phone: (608)262-0438 1210 West Dayton Street
* FAX: (608)262-9777 Madison, WI 53706
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "ps.h"
#ifndef SEEK_SET
#define SEEK_SET 0
#endif
#ifndef BUFSIZ
#define BUFSIZ 1024
#endif
/* length calculates string length at compile time */
/* can only be used with character constants */
#define length(a) (sizeof(a)-1)
#define iscomment(a, b) (strncmp(a, b, length(b)) == 0)
#define DSCcomment(a) (a[0] == '%' && a[1] == '%')
/*
* pscopy -- copy lines of Postscript from a section of one file
* to another file.
* Automatically switch to binary copying whenever
* %%BeginBinary/%%EndBinary or %%BeginData/%%EndData
* comments are encountered.
*/
void
pscopy(from, to, begin, end)
FILE *from;
FILE *to;
long begin; /* set negative to avoid initial seek */
long end;
{
char line[PSLINELENGTH]; /* 255 characters + 1 newline + 1 NULL */
char text[PSLINELENGTH]; /* Temporary storage for text */
unsigned int num;
unsigned int i;
char buf[BUFSIZ];
if (begin >= 0) fseek(from, begin, SEEK_SET);
while (ftell(from) < end) {
fgets(line, sizeof line, from);
fputs(line, to);
if (!(DSCcomment(line) && iscomment(line+2, "Begin"))) {
/* Do nothing */
} else if (iscomment(line+7, "Data:")) {
int rc = 0;
text[0] = '\0';
rc = sscanf(line+length("%%BeginData:"), "%d %*s %256s", &num,text);
text[256] = '\0';
if (rc >= 1) {
if (strcmp(text, "Lines") == 0) {
for (i=0; i < num; i++) {
fgets(line, sizeof line, from);
fputs(line, to);
}
} else {
while (num > BUFSIZ) {
fread(buf, sizeof (char), BUFSIZ, from);
fwrite(buf, sizeof (char), BUFSIZ, to);
num -= BUFSIZ;
}
fread(buf, sizeof (char), num, from);
fwrite(buf, sizeof (char), num, to);
}
}
} else if (iscomment(line+7, "Binary:")) {
if(sscanf(line+length("%%BeginBinary:"), "%d", &num) == 1) {
while (num > BUFSIZ) {
fread(buf, sizeof (char), BUFSIZ, from);
fwrite(buf, sizeof (char), BUFSIZ, to);
num -= BUFSIZ;
}
fread(buf, sizeof (char), num, from);
fwrite(buf, sizeof (char), num, to);
}
}
}
}
/*
* pscopyuntil -- copy lines of Postscript from a section of one file
* to another file until a particular comment is reached.
* Automatically switch to binary copying whenever
* %%BeginBinary/%%EndBinary or %%BeginData/%%EndData
* comments are encountered.
*/
char *
pscopyuntil(from, to, begin, end, comment)
FILE *from;
FILE *to;
long begin; /* set negative to avoid initial seek */
long end;
const char *comment;
{
char line[PSLINELENGTH]; /* 255 characters + 1 newline + 1 NULL */
char text[PSLINELENGTH]; /* Temporary storage for text */
unsigned int num;
unsigned int i;
int comment_length;
char buf[BUFSIZ];
char *cp;
comment_length = strlen(comment);
if (begin >= 0) fseek(from, begin, SEEK_SET);
while (ftell(from) < end) {
fgets(line, sizeof line, from);
/* iscomment cannot be used here,
* because comment_length is not known at compile time. */
if (strncmp(line, comment, comment_length) == 0) {
cp = (char *) malloc(strlen(line)+1);
if (cp == NULL) {
fprintf(stderr, "Fatal Error: Dynamic memory exhausted.\n");
exit(-1);
}
strcpy(cp, line);
return cp;
}
fputs(line, to);
if (!(DSCcomment(line) && iscomment(line+2, "Begin"))) {
/* Do nothing */
} else if (iscomment(line+7, "Data:")) {
int rc = 0;
text[0] = '\0';
rc = sscanf(line+length("%%BeginData:"), "%d %*s %256s", &num,text);
text[256] = '\0';
if (rc >= 1) {
if (strcmp(text, "Lines") == 0) {
for (i=0; i < num; i++) {
fgets(line, sizeof line, from);
fputs(line, to);
}
} else {
while (num > BUFSIZ) {
fread(buf, sizeof (char), BUFSIZ, from);
fwrite(buf, sizeof (char), BUFSIZ, to);
num -= BUFSIZ;
}
fread(buf, sizeof (char), num, from);
fwrite(buf, sizeof (char), num, to);
}
}
} else if (iscomment(line+7, "Binary:")) {
if(sscanf(line+length("%%BeginBinary:"), "%d", &num) == 1) {
while (num > BUFSIZ) {
fread(buf, sizeof (char), BUFSIZ, from);
fwrite(buf, sizeof (char), BUFSIZ, to);
num -= BUFSIZ;
}
fread(buf, sizeof (char), num, from);
fwrite(buf, sizeof (char), num, to);
}
}
}
return NULL;
}
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