pdfio/examples/pdfioinfo.c

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//
// PDF metadata example for PDFio.
//
// Copyright © 2023-2024 by Michael R Sweet.
//
// Licensed under Apache License v2.0. See the file "LICENSE" for more
// information.
//
// Usage:
//
// ./pdfioinfo FILENAME.pdf
//
#include <pdfio.h>
#include <time.h>
//
// 'main()' - Open a PDF file and show its metadata.
//
int // O - Exit status
main(int argc, // I - Number of command-line arguments
char *argv[]) // Command-line arguments
{
const char *filename; // PDF filename
pdfio_file_t *pdf; // PDF file
time_t creation_date; // Creation date
struct tm *creation_tm; // Creation date/time information
char creation_text[256]; // Creation date/time as a string
// Get the filename from the command-line...
if (argc != 2)
{
fputs("Usage: ./pdfioinfo FILENAME.pdf\n", stderr);
return (1);
}
filename = argv[1];
// Open the PDF file with the default callbacks...
pdf = pdfioFileOpen(filename, /*password_cb*/NULL,
/*password_cbdata*/NULL, /*error_cb*/NULL,
/*error_cbdata*/NULL);
if (pdf == NULL)
return (1);
// Get the creation date and convert to a string...
creation_date = pdfioFileGetCreationDate(pdf);
creation_tm = localtime(&creation_date);
strftime(creation_text, sizeof(creation_text), "%c", creation_tm);
// Print file information to stdout...
printf("%s:\n", filename);
printf(" Title: %s\n", pdfioFileGetTitle(pdf));
printf(" Author: %s\n", pdfioFileGetAuthor(pdf));
printf(" Created On: %s\n", creation_text);
printf(" Number Pages: %u\n", (unsigned)pdfioFileGetNumPages(pdf));
// Close the PDF file...
pdfioFileClose(pdf);
return (0);
}