pdfio/pdfiototext.c

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//
// PDF to text program for PDFio.
//
// Copyright © 2022 by Michael R Sweet.
//
// Licensed under Apache License v2.0. See the file "LICENSE" for more
// information.
//
// Usage:
//
// ./pdfiototext FILENAME.pdf > FILENAME.txt
//
#include "pdfio.h"
#include <string.h>
//
// 'main()' - Main entry.
//
int // O - Exit status
main(int argc, // I - Number of command-line arguments
char *argv[]) // I - Command-line arguments
{
pdfio_file_t *file; // PDF file
size_t i, j, // Looping vars
num_pages, // Number of pages
num_streams; // Number of streams for page
pdfio_obj_t *obj; // Current page object
pdfio_stream_t *st; // Current page content stream
char buffer[1024]; // String buffer
bool first; // First string token?
// Verify command-line arguments...
if (argc != 2)
{
puts("Usage: pdfiototext FILENAME.pdf > FILENAME.txt");
return (1);
}
// Open the PDF file...
if ((file = pdfioFileOpen(argv[1], NULL, NULL, NULL, NULL)) == NULL)
return (1);
// printf("%s: %u pages\n", argv[1], (unsigned)pdfioFileGetNumPages(file));
// Try grabbing content from all of the pages...
for (i = 0, num_pages = pdfioFileGetNumPages(file); i < num_pages; i ++)
{
if ((obj = pdfioFileGetPage(file, i)) == NULL)
continue;
num_streams = pdfioPageGetNumStreams(obj);
// printf("%s: page%u=%p, num_streams=%u\n", argv[1], (unsigned)i, obj, (unsigned)num_streams);
for (j = 0; j < num_streams; j ++)
{
if ((st = pdfioPageOpenStream(obj, j, true)) == NULL)
continue;
// printf("%s: page%u st%u=%p\n", argv[1], (unsigned)i, (unsigned)j, st);
first = true;
while (pdfioStreamGetToken(st, buffer, sizeof(buffer)))
{
if (buffer[0] == '(')
{
if (first)
first = false;
else
putchar(' ');
fputs(buffer + 1, stdout);
}
else if (!strcmp(buffer, "Td") || !strcmp(buffer, "TD") || !strcmp(buffer, "T*") || !strcmp(buffer, "\'") || !strcmp(buffer, "\""))
{
putchar('\n');
first = true;
}
}
if (!first)
putchar('\n');
pdfioStreamClose(st);
}
}
pdfioFileClose(file);
return (0);
}