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#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "nspdferror.h"
#include "cos_object.h"
#include "pdf_doc.h"
nspdferror cos_free_object(struct cos_object *cos_obj)
{
struct cos_dictionary_entry *dentry;
struct cos_array_entry *aentry;
switch (cos_obj->type) {
case COS_TYPE_NAME:
free(cos_obj->u.n);
break;
case COS_TYPE_STRING:
free(cos_obj->u.s->data);
free(cos_obj->u.s);
break;
case COS_TYPE_DICTIONARY:
dentry = cos_obj->u.dictionary;
while (dentry != NULL) {
struct cos_dictionary_entry *odentry;
cos_free_object(dentry->key);
cos_free_object(dentry->value);
odentry = dentry;
dentry = dentry->next;
free(odentry);
}
break;
case COS_TYPE_ARRAY:
aentry = cos_obj->u.array;
while (aentry != NULL) {
struct cos_array_entry *oaentry;
cos_free_object(aentry->value);
oaentry = aentry;
aentry = aentry->next;
free(oaentry);
}
case COS_TYPE_STREAM:
free(cos_obj->u.stream);
break;
}
free(cos_obj);
return NSPDFERROR_OK;
}
nspdferror
cos_dictionary_get_value(struct cos_object *dict,
const char *key,
struct cos_object **value_out)
{
struct cos_dictionary_entry *entry;
if (dict->type != COS_TYPE_DICTIONARY) {
return NSPDFERROR_TYPE;
}
entry = dict->u.dictionary;
while (entry != NULL) {
if (strcmp(entry->key->u.n, key) == 0) {
*value_out = entry->value;
return NSPDFERROR_OK;
}
entry = entry->next;
}
return NSPDFERROR_NOTFOUND;
}
/**
* extracts a value for a key in a dictionary.
*
* this finds and returns a value for a given key removing it from a dictionary
*/
nspdferror
cos_dictionary_extract_value(struct cos_object *dict,
const char *key,
struct cos_object **value_out)
{
struct cos_dictionary_entry *entry;
struct cos_dictionary_entry **prev;
if (dict->type != COS_TYPE_DICTIONARY) {
return NSPDFERROR_TYPE;
}
prev = &dict->u.dictionary;
entry = *prev;
while (entry != NULL) {
if (strcmp(entry->key->u.n, key) == 0) {
*value_out = entry->value;
*prev = entry->next;
cos_free_object(entry->key);
free(entry);
return NSPDFERROR_OK;
}
prev = &entry->next;
entry = *prev;
}
return NSPDFERROR_NOTFOUND;
}
nspdferror
cos_get_int(struct pdf_doc *doc,
struct cos_object *cobj,
int64_t *value_out)
{
nspdferror res;
res = xref_get_referenced(doc, &cobj);
if (res == NSPDFERROR_OK) {
if (cobj->type != COS_TYPE_INT) {
res = NSPDFERROR_TYPE;
} else {
*value_out = cobj->u.i;
}
}
return res;
}
nspdferror
cos_get_dictionary(struct pdf_doc *doc,
struct cos_object *cobj,
struct cos_object **value_out)
{
nspdferror res;
res = xref_get_referenced(doc, &cobj);
if (res == NSPDFERROR_OK) {
if (cobj->type != COS_TYPE_DICTIONARY) {
res = NSPDFERROR_TYPE;
} else {
*value_out = cobj;
}
}
return res;
}
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