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

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Examples written in C: Using tags
/* This file is in the public domain. */
#include <gta/gta.h>
int main(void)
{
gta_type_t components[] = { GTA_UINT16, GTA_FLOAT32, GTA_CFLOAT64 };
uintmax_t dimensions[] = { 170, 190 };
gta_header_t *header;
gta_taglist_t *taglist;
gta_result_t r;
uintmax_t tags, t;
const char *name, *value;
/* Create an example GTA */
r = gta_create_header(&header);
if (r != GTA_OK) {
return 1;
}
r = gta_set_components(header, 3, components, NULL);
if (r != GTA_OK) {
return 1;
}
r = gta_set_dimensions(header, 2, dimensions);
if (r != GTA_OK) {
return 1;
}
/* The global taglist contains tags that affect the whole array */
taglist = gta_get_global_taglist(header);
/* Set a tag */
r = gta_set_tag(taglist, "PRODUCER", "FOO");
if (r != GTA_OK) {
return 1;
}
/* Get a tag */
value = gta_get_tag(taglist, "X-BAR");
if (!value) {
/* This tag is undefined */
}
else if (value[0] == '\0') {
/* This tag is defined but empty */
}
else {
/* This tag is defined and not empty */
}
/* Unset a tag, whether it is defined or not */
r = gta_unset_tag(taglist, "X-FOO");
if (r != GTA_OK) {
return 1;
}
/* Unset all tags (clear the taglist) */
gta_unset_all_tags(taglist);
/* Access all tags in the list */
tags = gta_get_tags(taglist);
for (t = 0; t < tags; t++) {
name = gta_get_tag_name(taglist, t);
value = gta_get_tag_value(taglist, t);
}
/* The dimension taglists contain tags that affect the array dimensions */
taglist = gta_get_dimension_taglist(header, 0);
r = gta_set_tag(taglist, "INTERPRETATION", "X");
if (r != GTA_OK) {
return 1;
}
/* ... */
taglist = gta_get_dimension_taglist(header, 1);
r = gta_set_tag(taglist, "INTERPRETATION", "Y");
if (r != GTA_OK) {
return 1;
}
/* ... */
/* The component taglists contain tags that affect the array element components */
taglist = gta_get_component_taglist(header, 0);
r = gta_set_tag(taglist, "INTERPRETATION", "X-FOO");
if (r != GTA_OK) {
return 1;
}
/* ... */
taglist = gta_get_component_taglist(header, 1);
r = gta_set_tag(taglist, "UNIT", "m");
if (r != GTA_OK) {
return 1;
}
/* ... */
taglist = gta_get_component_taglist(header, 2);
r = gta_set_tag(taglist, "X-FOO", "BAR");
if (r != GTA_OK) {
return 1;
}
/* ... */
gta_destroy_header(header);
return 0;
}