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bser.c
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bser.c
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#define _POSIX_C_SOURCE 200809L
#include <string.h>
#include <stdarg.h>
#include <assert.h>
#include "bser.h"
#include "bser_private.h"
int
bser_is_integer(bser_t* bser)
{
bser_parse_if_necessary(bser);
return bser->type == BSER_TAG_INT64;
}
int
bser_is_real(bser_t* bser)
{
bser_parse_if_necessary(bser);
return bser->type == BSER_TAG_REAL;
}
int
bser_is_true(bser_t* bser)
{
bser_parse_if_necessary(bser);
return bser->type == BSER_TAG_TRUE;
}
int
bser_is_false(bser_t* bser)
{
bser_parse_if_necessary(bser);
return bser->type == BSER_TAG_FALSE;
}
int
bser_is_boolean(bser_t* bser)
{
return bser_is_true(bser) || bser_is_false(bser);
}
int
bser_is_null(bser_t* bser)
{
bser_parse_if_necessary(bser);
return bser->type == BSER_TAG_NULL;
}
int
bser_is_string(bser_t* bser)
{
bser_parse_if_necessary(bser);
return bser->type == BSER_TAG_STRING;
}
int
bser_is_array(bser_t* bser)
{
bser_parse_if_necessary(bser);
return bser->type == BSER_TAG_ARRAY;
}
int
bser_is_object(bser_t* bser)
{
bser_parse_if_necessary(bser);
return bser->type == BSER_TAG_OBJECT;
}
int
bser_is_error(bser_t* bser)
{
bser_parse_if_necessary(bser);
return bser->type == BSER_TAG_ERROR;
}
int64_t bser_integer_value(bser_t* bser)
{
bser_parse_if_necessary(bser);
assert(bser_is_integer(bser));
return bser->value.integer;
}
double bser_real_value(bser_t* bser)
{
bser_parse_if_necessary(bser);
assert(bser_is_real(bser));
return bser->value.real;
}
const char* bser_string_value(bser_t* bser, size_t* length_ret)
{
bser_parse_if_necessary(bser);
assert(bser_is_string(bser));
*length_ret = bser->value.string.length;
return bser->value.string.chars;
}
size_t bser_array_size(bser_t* bser)
{
bser_parse_if_necessary(bser);
assert(bser_is_array(bser));
return bser->value.array.length;
}
size_t bser_object_size(bser_t* bser)
{
bser_parse_if_necessary(bser);
assert(bser_is_object(bser));
return bser->value.object.length;
}
const char* bser_error_message(bser_t* bser)
{
assert(bser_is_error(bser));
return bser->value.error_message;
}
bser_t*
bser_new_integer(int64_t value, bser_t* fill)
{
if (fill == NULL) {
fill = bser_alloc();
}
fill->type = BSER_TAG_INT64;
fill->value.integer = value;
return fill;
}
bser_t*
bser_new_real(double value, bser_t* fill)
{
if (fill == NULL) {
fill = bser_alloc();
}
fill->type = BSER_TAG_REAL;
fill->value.real = value;
return fill;
}
bser_t*
bser_new_true(bser_t* fill)
{
if (fill == NULL) {
fill = bser_alloc();
}
fill->type = BSER_TAG_TRUE;
return fill;
}
bser_t*
bser_new_false(bser_t* fill)
{
if (fill == NULL) {
fill = bser_alloc();
}
fill->type = BSER_TAG_FALSE;
return fill;
}
bser_t*
bser_new_null(bser_t* fill)
{
if (fill == NULL) {
fill = bser_alloc();
}
fill->type = BSER_TAG_NULL;
return fill;
}
bser_t*
bser_new_string(const char* chars, size_t len, bser_t* fill)
{
if (fill == NULL) {
fill = bser_alloc();
}
fill->type = BSER_TAG_STRING;
fill->value.string.chars = chars;
fill->value.string.length = len;
return fill;
}
bser_t*
bser_new_array(bser_t* elems, size_t len, bser_t* fill)
{
if (fill == NULL) {
fill = bser_alloc();
}
fill->type = BSER_TAG_ARRAY;
fill->value.array.elements = elems;
fill->value.array.length = len;
return fill;
}
bser_t*
bser_new_object(bser_key_value_pair_t* fields,
size_t length, bser_t* fill)
{
if (fill == NULL) {
fill = bser_alloc();
}
fill->type = BSER_TAG_OBJECT;
fill->value.object.fields = fields;
fill->value.object.length = length;
return fill;
}
static void
bser_free_array_contents(bser_t* bser)
{
assert(bser_is_array(bser));
for (int i = 0; i < bser->value.array.length; ++i) {
bser_free_contents(&bser->value.array.elements[i]);
}
free(bser->value.array.elements);
}
static void
bser_free_object_contents(bser_t* bser)
{
assert(bser_is_object(bser));
for (int i = 0; i < bser->value.object.length; ++i) {
bser_free_contents(&bser->value.object.fields[i].value);
}
free(bser->value.object.fields);
}
void
bser_free_contents(bser_t* bser)
{
if (bser_is_array(bser)) {
bser_free_array_contents(bser);
} else if (bser_is_object(bser)) {
bser_free_object_contents(bser);
}
bser->type = BSER_TAG_ERROR;
bser->value.error_message = "<deallocated>";
}
void
bser_free(bser_t* bser) {
bser_free_contents(bser);
free(bser);
}
int
bser_string_strcmp(const char* match, bser_t* bser)
{
int cmp;
assert(bser_is_string(bser));
bser_parse_if_necessary(bser);
size_t match_len = strlen(match);
size_t bser_len = bser->value.string.length;
const char* bser_value = bser->value.string.chars;
if (match_len > bser_len) {
cmp = memcmp(match, bser_value, bser_len);
cmp = cmp == 0 ? (unsigned char)match[bser_len] : cmp;
} else if (bser_len > match_len) {
cmp = memcmp(match, bser_value, match_len);
cmp = cmp == 0 ? (unsigned char)bser_value[match_len] : cmp;
} else {
cmp = memcmp(match, bser_value, match_len);
}
return cmp;
}
bser_t*
bser_object_get(bser_t* bser, const char* key)
{
assert(bser_is_object(bser));
for (int i = 0; i < bser->value.object.length; ++i) {
bser_key_value_pair_t* pair = bser_object_pair_at(bser, i);
bser_parse_if_necessary(&pair->key);
assert(bser_is_string(&pair->key));
bser_parse_if_necessary(&pair->value);
if (!bser_string_strcmp(key, &pair->key)) {
if (bser_is_no_field(&pair->value)) {
return NULL;
} else {
return &pair->value;
}
}
}
return NULL;
}
bser_t*
bser_array_get(bser_t* bser, size_t index)
{
bser_parse_if_necessary(bser);
assert(bser_is_array(bser));
assert(index < bser->value.array.length);
bser_t* element = &bser->value.array.elements[index];
/* Can't return an unparsed element unless all elements prior
* have been parsed. */
bser_parse_array_elements_to(bser, index);
return element;
}
bser_t*
bser_object_key_at(bser_t* bser, size_t index)
{
bser_parse_if_necessary(bser);
assert(bser_is_object(bser));
bser_key_value_pair_t* field = bser_object_pair_at(bser, index);
if (bser_is_unparsed(&field->key)) {
bser_parse_object_fields_to(bser, index);
}
return &field->key;
}
bser_t*
bser_object_value_at(bser_t* bser, size_t index)
{
bser_parse_if_necessary(bser);
assert(bser_is_object(bser));
bser_key_value_pair_t* field = bser_object_pair_at(bser, index);
if (bser_is_unparsed(&field->value)) {
bser_parse_object_fields_to(bser, index);
bser_parse_if_necessary(&field->key);
}
if (bser_is_no_field(&field->value)) {
return NULL;
} else {
return &field->value;
}
}
json_t*
bser2json(bser_t* bser)
{
if (bser_is_integer(bser)) {
json_int_t v = bser_integer_value(bser);
return json_integer(v);
} else if (bser_is_real(bser)) {
double v = bser_real_value(bser);
return json_real(v);
} else if (bser_is_true(bser)) {
return json_true();
} else if (bser_is_false(bser)) {
return json_false();
} else if (bser_is_null(bser)) {
return json_null();
} else if (bser_is_string(bser)) {
size_t length;
const char* str = bser_string_value(bser, &length);
char* dup = strndup(str, length);
json_t* string = json_string(dup);
free(dup);
return string;
} else if (bser_is_array(bser)) {
size_t length = bser_array_size(bser);
json_t* array = json_array();
for (int i = 0; i < length; ++i) {
json_array_append_new(array, bser2json(bser_array_get(bser, i)));
}
return array;
} else if (bser_is_object(bser)) {
size_t length = bser_object_size(bser);
json_t* object = json_object();
for (int i = 0; i < length; ++i) {
size_t key_length;
bser_t* key = bser_object_key_at(bser, i);
assert(bser_is_string(key));
bser_t* value = bser_object_value_at(bser, i);
if (!bser_is_no_field(value)) {
const char* key_chars = bser_string_value(key, &key_length);
assert(key_chars != NULL && *key_chars != '\0');
char* key_dup = strndup(key_chars, key_length);
json_object_set_new(object, key_dup, bser2json(value));
free(key_dup);
}
}
return object;
} else {
return NULL;
}
}