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//
// Copyright 2007-2009 Johannes Hofmann <Johannes.Hofmann@gmx.de>
//
// This software may be used and distributed according to the terms
// of the GNU General Public License, incorporated herein by reference.
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <ctype.h>
#include "PostscriptDSC.H"
PostscriptDSC::PostscriptDSC() {
bb_x = 0;
bb_y = 0;
bb_w = 594; // A4
bb_h = 841; //
setup_len = 0;
pages = 0;
page_off = NULL;
page_len = NULL;
}
PostscriptDSC::~PostscriptDSC() {
if (page_off) {
free(page_off);
}
if (page_len) {
free(page_len);
}
}
int
PostscriptDSC::parse(int fd) {
FILE *fp;
char linebuf[1024];
int x, y, w, h;
int p1 = 0;
int bb_read = 0;
int max_pages = 128;
bb_x = 0;
bb_y = 0;
bb_w = 594; // A4
bb_h = 841; //
setup_len = 0;
pages = 0;
if (page_off) {
free(page_off);
page_off = NULL;
}
if(page_len) {
free(page_len);
page_len = NULL;
}
fp = fdopen(fd, "r");
if (!fp) {
perror("fdopen");
return 1;
}
page_off = (size_t*) malloc(sizeof(size_t) * max_pages);
memset(page_off, 0, sizeof(size_t) * max_pages);
page_len = (size_t*) malloc(sizeof(size_t) * max_pages);
memset(page_len, 0, sizeof(size_t) * max_pages);
while (fgets(linebuf, sizeof(linebuf), fp) != NULL) {
if (!bb_read &&
sscanf(linebuf, "%%%%BoundingBox: %d %d %d %d", &x, &y, &w, &h) == 4) {
bb_x = x;
bb_y = y;
bb_w = w;
bb_h = h;
bb_read++;
} else if (setup_len == 0 &&
strncmp(linebuf, "%%EndSetup", strlen("%%EndSetup")) == 0) {
setup_len = ftell(fp);
} else if (strncmp(linebuf, "%%Page: ", strlen("%%Page: ")) == 0) {
char *p_str = &linebuf[strlen(linebuf)];
// implicitely end setup section
if (!setup_len) {
setup_len = ftell(fp);
}
// move p_str back to beginning of last number in linebuf
while (p_str > linebuf && !isdigit(*p_str)) {
p_str--;
}
while (p_str > linebuf && isdigit(*p_str)) {
p_str--;
}
p1 = atoi(p_str);
if (p1 < 1) {
fprintf(stderr, "Page %d out of range\n", p1);
return 1;
}
if (p1 > max_pages) {
page_off = (size_t*) realloc(page_off, 2 * max_pages * sizeof(size_t));
memset(page_off + max_pages, 0, sizeof(size_t) * max_pages);
page_len = (size_t*) realloc(page_len, 2 * max_pages * sizeof(size_t));
memset(page_len + max_pages, 0, sizeof(size_t) * max_pages);
max_pages = max_pages * 2;
}
if (page_off[p1 - 1] != 0) {
fprintf(stderr, "Page %d already defined\n", p1);
return 1;
}
if (p1 > 1 && page_off[p1 - 2] == 0) {
fprintf(stderr, "Page %d not yet defined\n", p1 - 1);
return 1;
}
page_off[p1 - 1] = ftell(fp);
if (p1 > 1) {
page_len[p1 - 2] = page_off[p1 - 1] - page_off[p1 - 2];
}
if (p1 > pages) {
pages = p1;
}
}
}
// Now do some checks
if (!setup_len) {
fprintf(stderr, "PageSetup end not found\n");
return 1;
}
if (page_len && page_off && p1 > 0 && p1 <= pages) {
page_len[p1 - 1] = ftell(fp) - page_off[p1 - 1];
for (int i=0; i<pages; i++) {
if (page_off[i] == 0 || page_len[i] == 0) {
fprintf(stderr, "Page %d not defined\n", i);
return 1;
}
}
} else {
return 1;
}
return 0;
}
void
PostscriptDSC::get_bounding_box(int *x, int *y, int *w, int *h) {
*x = bb_x;
*y = bb_y;
*w = bb_w;
*h = bb_h;
}
int
PostscriptDSC::get_pages() {
return pages;
}
size_t
PostscriptDSC::get_setup_len() {
return setup_len;
}
size_t
PostscriptDSC::get_page_off(int p) {
if (p < 1 || p > pages) {
return 0;
} else {
return page_off[p - 1];
}
}
size_t
PostscriptDSC::get_page_len(int p) {
if (p < 1 || p > pages) {
return 0;
} else {
return page_len[p - 1];
}
}
void
PostscriptDSC::print() {
int i;
printf("x %d, y %d, w %d, h %d\n", bb_x, bb_y, bb_w, bb_h);
printf("setup_len %zu\n", setup_len);
for (i=0; i<pages; i++) {
printf("p %d, off %zu, len %zu\n", i, page_off[i], page_len[i]);
}
}
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