diff options
Diffstat (limited to 'src/cos_object.c')
| -rw-r--r-- | src/cos_object.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/src/cos_object.c b/src/cos_object.c index a5bd738..5bfd423 100644 --- a/src/cos_object.c +++ b/src/cos_object.c @@ -188,6 +188,59 @@ cos_get_dictionary_dictionary(struct pdf_doc *doc, } nspdferror +cos_heritable_dictionary_dictionary(struct pdf_doc *doc, + struct cos_object *dict, + const char *key, + struct cos_object **value_out) +{ + nspdferror res; + struct cos_object *dict_value; + res = cos_get_dictionary_value(doc, dict, key, &dict_value); + if (res == NSPDFERROR_NOTFOUND) { + /* \todo get parent entry and extract key from that dictionary instead */ + } + if (res != NSPDFERROR_OK) { + return res; + } + return cos_get_dictionary(doc, dict_value, value_out); +} + +nspdferror +cos_get_dictionary_array(struct pdf_doc *doc, + struct cos_object *dict, + const char *key, + struct cos_object **value_out) +{ + nspdferror res; + struct cos_object *dict_value; + + res = cos_get_dictionary_value(doc, dict, key, &dict_value); + if (res != NSPDFERROR_OK) { + return res; + } + return cos_get_array(doc, dict_value, value_out); +} + +nspdferror +cos_heritable_dictionary_array(struct pdf_doc *doc, + struct cos_object *dict, + const char *key, + struct cos_object **value_out) +{ + nspdferror res; + struct cos_object *dict_value; + + res = cos_get_dictionary_value(doc, dict, key, &dict_value); + if (res == NSPDFERROR_NOTFOUND) { + /* \todo get parent entry and extract key from that dictionary instead */ + } + if (res != NSPDFERROR_OK) { + return res; + } + return cos_get_array(doc, dict_value, value_out); +} + +nspdferror cos_get_int(struct pdf_doc *doc, struct cos_object *cobj, int64_t *value_out) @@ -242,3 +295,98 @@ cos_get_dictionary(struct pdf_doc *doc, } return res; } + +nspdferror +cos_get_array(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_ARRAY) { + res = NSPDFERROR_TYPE; + } else { + *value_out = cobj; + } + } + return res; +} + +/* + * get a value for a key from a dictionary + */ +nspdferror +cos_get_array_value(struct pdf_doc *doc, + struct cos_object *array, + unsigned int index, + struct cos_object **value_out) +{ + nspdferror res; + struct cos_array_entry *entry; + + res = xref_get_referenced(doc, &array); + if (res == NSPDFERROR_OK) { + if (array->type != COS_TYPE_ARRAY) { + res = NSPDFERROR_TYPE; + } else { + unsigned int cur_index = 0; + res = NSPDFERROR_RANGE; + + entry = array->u.array; + while (entry != NULL) { + if (cur_index == index) { + *value_out = entry->value; + res = NSPDFERROR_OK; + break; + } + cur_index++; + entry = entry->next; + } + } + } + return res; +} + +nspdferror +cos_get_array_dictionary(struct pdf_doc *doc, + struct cos_object *array, + unsigned int index, + struct cos_object **value_out) +{ + nspdferror res; + struct cos_object *array_value; + + res = cos_get_array_value(doc, array, index, &array_value); + if (res != NSPDFERROR_OK) { + return res; + } + return cos_get_dictionary(doc, array_value, value_out); +} + +nspdferror +cos_get_array_size(struct pdf_doc *doc, + struct cos_object *cobj, + unsigned int *size_out) +{ + nspdferror res; + unsigned int array_size = 0; + struct cos_array_entry *array_entry; + + res = xref_get_referenced(doc, &cobj); + if (res == NSPDFERROR_OK) { + if (cobj->type != COS_TYPE_ARRAY) { + res = NSPDFERROR_TYPE; + } else { + /* walk array list to enumerate entries */ + array_entry = cobj->u.array; + while (array_entry != NULL) { + array_size++; + array_entry = array_entry->next; + } + *size_out = array_size; + } + } + return res; +} |