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media-session: fix parsing of booleans and null

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Reorder the json file a bit
This commit is contained in:
Wim Taymans 2020-11-23 10:10:59 +01:00
parent 77b8959df5
commit 1f73280c52
1 changed files with 53 additions and 49 deletions
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102
src/examples/media-session/json.h
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@ -35,6 +35,7 @@ extern "C" {
#include <stdint.h> #include <stdint.h>
/* a simple JSON compatible tokenizer */
struct spa_json { struct spa_json {
const char *cur; const char *cur;
const char *end; const char *end;
@ -56,6 +57,8 @@ static inline void spa_json_enter(struct spa_json * iter, struct spa_json * sub)
*sub = SPA_JSON_ENTER(iter); *sub = SPA_JSON_ENTER(iter);
} }
/** Get the next token. \a value points to the token and the return value
* is the length. */
static inline int spa_json_next(struct spa_json * iter, const char **value) static inline int spa_json_next(struct spa_json * iter, const char **value)
{ {
int utf8_remain = 0; int utf8_remain = 0;
@ -166,51 +169,62 @@ static inline int spa_json_enter_container(struct spa_json *iter, struct spa_jso
return 1; return 1;
} }
/* object */
static inline int spa_json_is_object(const char *val, int len)
{
return len > 0 && *val == '{';
}
static inline int spa_json_enter_object(struct spa_json *iter, struct spa_json *sub) static inline int spa_json_enter_object(struct spa_json *iter, struct spa_json *sub)
{ {
return spa_json_enter_container(iter, sub, '{'); return spa_json_enter_container(iter, sub, '{');
} }
/* array */
static inline bool spa_json_is_array(const char *val, int len)
{
return len > 0 && *val == '[';
}
static inline int spa_json_enter_array(struct spa_json *iter, struct spa_json *sub) static inline int spa_json_enter_array(struct spa_json *iter, struct spa_json *sub)
{ {
return spa_json_enter_container(iter, sub, '['); return spa_json_enter_container(iter, sub, '[');
} }
static inline int spa_json_is_object(const char *val, int len) /* null */
{
return len > 0 && *val == '{';
}
static inline bool spa_json_is_array(const char *val, int len)
{
return len > 0 && *val == '[';
}
static inline bool spa_json_is_float(const char *val, int len)
{
char *end;
strtof(val, &end);
return end == val + len;
}
static inline bool spa_json_is_string(const char *val, int len)
{
return len > 1 && *val == '"';
}
static inline bool spa_json_is_null(const char *val, int len) static inline bool spa_json_is_null(const char *val, int len)
{ {
return len == 4 && strcmp(val, "null") == 0; return len == 4 && strncmp(val, "null", 4) == 0;
} }
/* float */
static inline int spa_json_parse_float(const char *val, int len, float *result)
{
char *end;
*result = strtof(val, &end);
return end == val + len;
}
static inline bool spa_json_is_float(const char *val, int len)
{
float dummy;
return spa_json_parse_float(val, len, &dummy);
}
static inline int spa_json_get_float(struct spa_json *iter, float *res)
{
const char *value;
int len;
if ((len = spa_json_next(iter, &value)) <= 0)
return -1;
return spa_json_parse_float(value, len, res);
}
/* bool */
static inline bool spa_json_is_true(const char *val, int len) static inline bool spa_json_is_true(const char *val, int len)
{ {
return len == 4 && strcmp(val, "true") == 0; return len == 4 && strncmp(val, "true", 4) == 0;
} }
static inline bool spa_json_is_false(const char *val, int len) static inline bool spa_json_is_false(const char *val, int len)
{ {
return len == 5 && strcmp(val, "false") == 0; return len == 5 && strncmp(val, "false", 5) == 0;
} }
static inline bool spa_json_is_bool(const char *val, int len) static inline bool spa_json_is_bool(const char *val, int len)
@ -218,12 +232,6 @@ static inline bool spa_json_is_bool(const char *val, int len)
return spa_json_is_true(val, len) || spa_json_is_false(val, len); return spa_json_is_true(val, len) || spa_json_is_false(val, len);
} }
static inline int spa_json_parse_float(const char *val, int len, float *result)
{
char *end;
*result = strtof(val, &end);
return end == val + len;
}
static inline int spa_json_parse_bool(const char *val, int len, bool *result) static inline int spa_json_parse_bool(const char *val, int len, bool *result)
{ {
if ((*result = spa_json_is_true(val, len))) if ((*result = spa_json_is_true(val, len)))
@ -232,6 +240,20 @@ static inline int spa_json_parse_bool(const char *val, int len, bool *result)
return 1; return 1;
return -1; return -1;
} }
static inline int spa_json_get_bool(struct spa_json *iter, bool *res)
{
const char *value;
int len;
if ((len = spa_json_next(iter, &value)) <= 0)
return -1;
return spa_json_parse_bool(value, len, res);
}
/* string */
static inline bool spa_json_is_string(const char *val, int len)
{
return len > 1 && *val == '"';
}
static inline int spa_json_parse_string(const char *val, int len, char *result) static inline int spa_json_parse_string(const char *val, int len, char *result)
{ {
@ -258,24 +280,6 @@ static inline int spa_json_parse_string(const char *val, int len, char *result)
return 1; return 1;
} }
static inline int spa_json_get_float(struct spa_json *iter, float *res)
{
const char *value;
int len;
if ((len = spa_json_next(iter, &value)) <= 0)
return -1;
return spa_json_parse_float(value, len, res);
}
static inline int spa_json_get_bool(struct spa_json *iter, bool *res)
{
const char *value;
int len;
if ((len = spa_json_next(iter, &value)) <= 0)
return -1;
return spa_json_parse_bool(value, len, res);
}
static inline int spa_json_get_string(struct spa_json *iter, char *res, int maxlen) static inline int spa_json_get_string(struct spa_json *iter, char *res, int maxlen)
{ {
const char *value; const char *value;