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RetroArch/libretro-db/rmsgpack_dom.c
twinaphex 12e51eb4b5 (libretrodb) Add headers and cleanups
2016-03-21 18:16:05 +01:00

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/* Copyright (C) 2010-2016 The RetroArch team
*
* ---------------------------------------------------------------------------------------
* The following license statement only applies to this file (rmsgpack_dom.c).
* ---------------------------------------------------------------------------------------
*
* Permission is hereby granted, free of charge,
* to any person obtaining a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "rmsgpack_dom.h"
#include <stdint.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include "rmsgpack.h"
#define MAX_DEPTH 128
struct dom_reader_state
{
int i;
struct rmsgpack_dom_value *stack[MAX_DEPTH];
};
static struct rmsgpack_dom_value *dom_reader_state_pop(struct dom_reader_state *s)
{
struct rmsgpack_dom_value *v = s->stack[s->i];
s->i--;
return v;
}
static int dom_reader_state_push(struct dom_reader_state *s, struct rmsgpack_dom_value *v)
{
if ((s->i + 1) == MAX_DEPTH)
return -ENOMEM;
s->i++;
s->stack[s->i] = v;
return 0;
}
static int dom_read_nil(void *data)
{
struct dom_reader_state *dom_state = (struct dom_reader_state *)data;
struct rmsgpack_dom_value *v =
(struct rmsgpack_dom_value*)dom_reader_state_pop(dom_state);
v->type = RDT_NULL;
return 0;
}
static int dom_read_bool(int value, void *data)
{
struct dom_reader_state *dom_state = (struct dom_reader_state *)data;
struct rmsgpack_dom_value *v =
(struct rmsgpack_dom_value*)dom_reader_state_pop(dom_state);
v->type = RDT_BOOL;
v->val.bool_ = value;
return 0;
}
static int dom_read_int(int64_t value, void *data)
{
struct dom_reader_state *dom_state = (struct dom_reader_state *)data;
struct rmsgpack_dom_value *v =
(struct rmsgpack_dom_value*)dom_reader_state_pop(dom_state);
v->type = RDT_INT;
v->val.int_ = value;
return 0;
}
static int dom_read_uint(uint64_t value, void *data)
{
struct dom_reader_state *dom_state = (struct dom_reader_state *)data;
struct rmsgpack_dom_value *v =
(struct rmsgpack_dom_value*)dom_reader_state_pop(dom_state);
v->type = RDT_UINT;
v->val.uint_ = value;
return 0;
}
static int dom_read_string(char *value, uint32_t len, void *data)
{
struct dom_reader_state *dom_state = (struct dom_reader_state *)data;
struct rmsgpack_dom_value *v =
(struct rmsgpack_dom_value*)dom_reader_state_pop(dom_state);
v->type = RDT_STRING;
v->val.string.len = len;
v->val.string.buff = value;
return 0;
}
static int dom_read_bin(void *value, uint32_t len, void *data)
{
struct dom_reader_state *dom_state = (struct dom_reader_state *)data;
struct rmsgpack_dom_value *v =
(struct rmsgpack_dom_value*)dom_reader_state_pop(dom_state);
v->type = RDT_BINARY;
v->val.binary.len = len;
v->val.binary.buff = (char *)value;
return 0;
}
static int dom_read_map_start(uint32_t len, void *data)
{
unsigned i;
struct rmsgpack_dom_pair *items = NULL;
struct dom_reader_state *dom_state = (struct dom_reader_state *)data;
struct rmsgpack_dom_value *v = dom_reader_state_pop(dom_state);
v->type = RDT_MAP;
v->val.map.len = len;
v->val.map.items = NULL;
items = (struct rmsgpack_dom_pair *)calloc(len,
sizeof(struct rmsgpack_dom_pair));
if (!items)
return -ENOMEM;
v->val.map.items = items;
for (i = 0; i < len; i++)
{
if (dom_reader_state_push(dom_state, &items[i].value) < 0)
return -ENOMEM;
if (dom_reader_state_push(dom_state, &items[i].key) < 0)
return -ENOMEM;
}
return 0;
}
static int dom_read_array_start(uint32_t len, void *data)
{
unsigned i;
struct dom_reader_state *dom_state = (struct dom_reader_state *)data;
struct rmsgpack_dom_value *v = dom_reader_state_pop(dom_state);
struct rmsgpack_dom_value *items = NULL;
v->type = RDT_ARRAY;
v->val.array.len = len;
v->val.array.items = NULL;
items = (struct rmsgpack_dom_value *)calloc(len, sizeof(struct rmsgpack_dom_pair));
if (!items)
return -ENOMEM;
v->val.array.items = items;
for (i = 0; i < len; i++)
{
if (dom_reader_state_push(dom_state, &items[i]) < 0)
return -ENOMEM;
}
return 0;
}
static struct rmsgpack_read_callbacks dom_reader_callbacks = {
dom_read_nil,
dom_read_bool,
dom_read_int,
dom_read_uint,
dom_read_string,
dom_read_bin,
dom_read_map_start,
dom_read_array_start
};
void rmsgpack_dom_value_free(struct rmsgpack_dom_value *v)
{
unsigned i;
switch (v->type)
{
case RDT_STRING:
free(v->val.string.buff);
break;
case RDT_BINARY:
free(v->val.binary.buff);
break;
case RDT_MAP:
for (i = 0; i < v->val.map.len; i++)
{
rmsgpack_dom_value_free(&v->val.map.items[i].key);
rmsgpack_dom_value_free(&v->val.map.items[i].value);
}
free(v->val.map.items);
break;
case RDT_ARRAY:
for (i = 0; i < v->val.array.len; i++)
rmsgpack_dom_value_free(&v->val.array.items[i]);
free(v->val.array.items);
break;
case RDT_NULL:
case RDT_INT:
case RDT_BOOL:
case RDT_UINT:
/* Do nothing */
break;
}
}
struct rmsgpack_dom_value *rmsgpack_dom_value_map_value(
const struct rmsgpack_dom_value *map,
const struct rmsgpack_dom_value *key)
{
unsigned i;
if (map->type != RDT_MAP)
return NULL;
for (i = 0; i < map->val.map.len; i++)
{
if (rmsgpack_dom_value_cmp(key, &map->val.map.items[i].key) == 0)
return &map->val.map.items[i].value;
}
return NULL;
}
int rmsgpack_dom_value_cmp(
const struct rmsgpack_dom_value *a,
const struct rmsgpack_dom_value *b
)
{
int rv;
unsigned i;
if (a == b)
return 1;
if (a->type != b->type)
return 1;
switch (a->type)
{
case RDT_NULL:
return 0;
case RDT_BOOL:
return a->val.bool_ == b->val.bool_ ? 0 : 1;
case RDT_INT:
return a->val.int_ == b->val.int_ ? 0 : 1;
case RDT_UINT:
return a->val.uint_ == b->val.uint_ ? 0 : 1;
case RDT_STRING:
if (a->val.string.len != b->val.string.len)
return 1;
return strncmp(a->val.string.buff, b->val.string.buff, a->val.string.len);
case RDT_BINARY:
if (a->val.binary.len != b->val.binary.len)
return 1;
return memcmp(a->val.binary.buff, b->val.binary.buff, a->val.binary.len);
case RDT_MAP:
if (a->val.map.len != b->val.map.len)
return 1;
for (i = 0; i < a->val.map.len; i++)
{
if ((rv = rmsgpack_dom_value_cmp(&a->val.map.items[i].key,
&b->val.map.items[i].key)) != 0)
return rv;
if ((rv = rmsgpack_dom_value_cmp(&a->val.map.items[i].value,
&b->val.map.items[i].value)) != 0)
return rv;
}
break;
case RDT_ARRAY:
if (a->val.array.len != b->val.array.len)
return 1;
for (i = 0; i < a->val.array.len; i++)
{
if ((rv = rmsgpack_dom_value_cmp(&a->val.array.items[i],
&b->val.array.items[i])) != 0)
return rv;
}
break;
}
return 1;
}
void rmsgpack_dom_value_print(struct rmsgpack_dom_value *obj)
{
unsigned i;
switch (obj->type)
{
case RDT_NULL:
printf("nil");
break;
case RDT_BOOL:
if (obj->val.bool_)
printf("true");
else
printf("false");
break;
case RDT_INT:
#ifdef _WIN32
printf("%I64d", (signed long long)obj->val.int_);
#else
printf("%lld", (signed long long)obj->val.int_);
#endif
break;
case RDT_UINT:
#ifdef _WIN32
printf("%I64u", (unsigned long long)obj->val.uint_);
#else
printf("%llu", (unsigned long long)obj->val.uint_);
#endif
break;
case RDT_STRING:
printf("\"%s\"", obj->val.string.buff);
break;
case RDT_BINARY:
printf("\"");
for (i = 0; i < obj->val.binary.len; i++)
printf("%02X", (unsigned char) obj->val.binary.buff[i]);
printf("\"");
break;
case RDT_MAP:
printf("{");
for (i = 0; i < obj->val.map.len; i++)
{
rmsgpack_dom_value_print(&obj->val.map.items[i].key);
printf(": ");
rmsgpack_dom_value_print(&obj->val.map.items[i].value);
if (i < (obj->val.map.len - 1))
printf(", ");
}
printf("}");
break;
case RDT_ARRAY:
printf("[");
for (i = 0; i < obj->val.array.len; i++)
{
rmsgpack_dom_value_print(&obj->val.array.items[i]);
if (i < (obj->val.array.len - 1))
printf(", ");
}
printf("]");
}
}
int rmsgpack_dom_write(RFILE *fd, const struct rmsgpack_dom_value *obj)
{
unsigned i;
int rv = 0;
int written = 0;
switch (obj->type)
{
case RDT_NULL:
return rmsgpack_write_nil(fd);
case RDT_BOOL:
return rmsgpack_write_bool(fd, obj->val.bool_);
case RDT_INT:
return rmsgpack_write_int(fd, obj->val.int_);
case RDT_UINT:
return rmsgpack_write_uint(fd, obj->val.uint_);
case RDT_STRING:
return rmsgpack_write_string(fd, obj->val.string.buff, obj->val.string.len);
case RDT_BINARY:
return rmsgpack_write_bin(fd, obj->val.binary.buff, obj->val.binary.len);
case RDT_MAP:
if ((rv = rmsgpack_write_map_header(fd, obj->val.map.len)) < 0)
return rv;
written += rv;
for (i = 0; i < obj->val.map.len; i++)
{
if ((rv = rmsgpack_dom_write(fd, &obj->val.map.items[i].key)) < 0)
return rv;
written += rv;
if ((rv = rmsgpack_dom_write(fd, &obj->val.map.items[i].value)) < 0)
return rv;
written += rv;
}
break;
case RDT_ARRAY:
if ((rv = rmsgpack_write_array_header(fd, obj->val.array.len)) < 0)
return rv;
written += rv;
for (i = 0; i < obj->val.array.len; i++)
{
if ((rv = rmsgpack_dom_write(fd, &obj->val.array.items[i])) < 0)
return rv;
written += rv;
}
}
return written;
}
int rmsgpack_dom_read(RFILE *fd, struct rmsgpack_dom_value *out)
{
struct dom_reader_state s;
int rv = 0;
s.i = 0;
s.stack[0] = out;
rv = rmsgpack_read(fd, &dom_reader_callbacks, &s);
if (rv < 0)
rmsgpack_dom_value_free(out);
return rv;
}
int rmsgpack_dom_read_into(RFILE *fd, ...)
{
va_list ap;
struct rmsgpack_dom_value map;
int rv;
const char *key_name;
struct rmsgpack_dom_value key;
struct rmsgpack_dom_value *value;
int64_t *int_value;
uint64_t *uint_value;
int *bool_value;
char *buff_value;
uint64_t min_len;
int value_type = 0;
va_start(ap, fd);
rv = rmsgpack_dom_read(fd, &map);
(void)value_type;
if (rv < 0)
{
va_end(ap);
return rv;
}
if (map.type != RDT_MAP)
{
rv = -EINVAL;
goto clean;
}
while (1)
{
key_name = va_arg(ap, const char *);
if (!key_name)
{
rv = 0;
goto clean;
}
key.type = RDT_STRING;
key.val.string.len = strlen(key_name);
key.val.string.buff = (char *) key_name;
value = rmsgpack_dom_value_map_value(&map, &key);
switch (value->type)
{
case RDT_INT:
int_value = va_arg(ap, int64_t *);
*int_value = value->val.int_;
break;
case RDT_BOOL:
bool_value = va_arg(ap, int *);
*bool_value = value->val.bool_;
break;
case RDT_UINT:
uint_value = va_arg(ap, uint64_t *);
*uint_value = value->val.uint_;
break;
case RDT_BINARY:
buff_value = va_arg(ap, char *);
uint_value = va_arg(ap, uint64_t *);
*uint_value = value->val.binary.len;
min_len = (value->val.binary.len > *uint_value) ?
*uint_value : value->val.binary.len;
memcpy(buff_value, value->val.binary.buff, (size_t)min_len);
break;
case RDT_STRING:
buff_value = va_arg(ap, char *);
uint_value = va_arg(ap, uint64_t *);
min_len = (value->val.string.len + 1 > *uint_value) ?
*uint_value : value->val.string.len + 1;
*uint_value = min_len;
memcpy(buff_value, value->val.string.buff, (size_t)min_len);
break;
default:
rv = -1;
goto clean;
}
}
clean:
va_end(ap);
rmsgpack_dom_value_free(&map);
return 0;
}
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