libgta 1.0.6 Read and Write Generic Tagged Array (GTA) files

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Examples written in C: Stream-based input/output
/* This file is in the public domain. */
#include <stdio.h>
#include <stdlib.h>
#include <gta/gta.h>
/* This example transforms an input GTA into an output GTA.
* It reads, manipulates and writes the array elements one at a time; the array
* data does not have to fit into memory. */
int main(void)
{
FILE *infile, *outfile;
gta_header_t *inheader, *outheader;
gta_io_state_t *instate, *outstate;
gta_result_t r;
void *element;
uintmax_t i;
/* Initialize input */
infile = fopen("input.gta", "r");
if (!infile) {
return 1;
}
r = gta_create_header(&inheader);
if (r != GTA_OK) {
return 1;
}
r = gta_create_io_state(&instate);
if (r != GTA_OK) {
return 1;
}
/* Initialize output */
outfile = fopen("output.gta", "w");
if (!outfile) {
return 1;
}
r = gta_create_header(&outheader);
if (r != GTA_OK) {
return 1;
}
r = gta_create_io_state(&outstate);
if (r != GTA_OK) {
return 1;
}
/* Copy the GTA header */
r = gta_read_header_from_stream(inheader, infile);
if (r != GTA_OK) {
return 1;
}
r = gta_clone_header(outheader, inheader);
if (r != GTA_OK) {
return 1;
}
/* In this example, the output GTA is always uncompressed */
gta_set_compression(outheader, GTA_NONE);
r = gta_write_header_to_stream(outheader, outfile);
if (r != GTA_OK) {
return 1;
}
/* Copy the array data */
if (gta_get_element_size(inheader) > SIZE_MAX) {
return 1;
}
element = malloc(gta_get_element_size(inheader));
if (!element) {
return 1;
}
for (i = 0; i < gta_get_elements(inheader); i++) {
r = gta_read_elements_from_stream(inheader, instate, 1, element, infile);
if (r != GTA_OK) {
return 1;
}
/* ... manipulate the element ... */
r = gta_write_elements_to_stream(outheader, outstate, 1, element, outfile);
if (r != GTA_OK) {
return 1;
}
}
/* Cleanup */
free(element);
gta_destroy_io_state(instate);
gta_destroy_header(inheader);
fclose(infile);
gta_destroy_io_state(outstate);
gta_destroy_header(outheader);
fclose(outfile);
return 0;
}