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Helper function to check the type of an item

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This is necessary, because you can get it wrong if you do it manually.
(when you forget the & 0xFF in the comparison)
This commit is contained in:
Max Bruckner 2017-02-26 14:30:50 +01:00
parent 501046247d
commit c26d53f0d7
2 changed files with 112 additions and 0 deletions
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100
cJSON.c
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@ -2149,3 +2149,103 @@ void cJSON_Minify(char *json)
/* and null-terminate. */
*into = '\0';
}
extern cjbool cJSON_IsInvalid(const cJSON * const item)
{
if (item == NULL)
{
return false;
}
return (item->type & 0xFF) == cJSON_Invalid;
}
extern cjbool cJSON_IsFalse(const cJSON * const item)
{
if (item == NULL)
{
return false;
}
return (item->type & 0xFF) == cJSON_False;
}
extern cjbool cJSON_IsTrue(const cJSON * const item)
{
if (item == NULL)
{
return false;
}
return (item->type & 0xff) == cJSON_True;
}
extern cjbool cJSON_IsBool(const cJSON * const item)
{
if (item == NULL)
{
return false;
}
return (item->type & (cJSON_True | cJSON_False)) != 0;
}
extern cjbool cJSON_IsNull(const cJSON * const item)
{
if (item == NULL)
{
return false;
}
return (item->type & 0xFF) == cJSON_NULL;
}
extern cjbool cJSON_IsNumber(const cJSON * const item)
{
if (item == NULL)
{
return false;
}
return (item->type & 0xFF) == cJSON_Number;
}
extern cjbool cJSON_IsString(const cJSON * const item)
{
if (item == NULL)
{
return false;
}
return (item->type & 0xFF) == cJSON_String;
}
extern cjbool cJSON_IsArray(const cJSON * const item)
{
if (item == NULL)
{
return false;
}
return (item->type & 0xFF) == cJSON_Array;
}
extern cjbool cJSON_IsObject(const cJSON * const item)
{
if (item == NULL)
{
return false;
}
return (item->type & 0xFF) == cJSON_Object;
}
extern cjbool cJSON_IsRaw(const cJSON * const item)
{
if (item == NULL)
{
return false;
}
return (item->type & 0xFF) == cJSON_Raw;
}

12
cJSON.h
View File

@ -109,6 +109,18 @@ extern int cJSON_HasObjectItem(const cJSON *object, const char *string);
/* For analysing failed parses. This returns a pointer to the parse error. You'll probably need to look a few chars back to make sense of it. Defined when cJSON_Parse() returns 0. 0 when cJSON_Parse() succeeds. */
extern const char *cJSON_GetErrorPtr(void);
/* These functions check the type of an item */
extern int cJSON_IsInvalid(const cJSON * const item);
extern int cJSON_IsFalse(const cJSON * const item);
extern int cJSON_IsTrue(const cJSON * const item);
extern int cJSON_IsBool(const cJSON * const item);
extern int cJSON_IsNull(const cJSON * const item);
extern int cJSON_IsNumber(const cJSON * const item);
extern int cJSON_IsString(const cJSON * const item);
extern int cJSON_IsArray(const cJSON * const item);
extern int cJSON_IsObject(const cJSON * const item);
extern int cJSON_IsRaw(const cJSON * const item);
/* These calls create a cJSON item of the appropriate type. */
extern cJSON *cJSON_CreateNull(void);
extern cJSON *cJSON_CreateTrue(void);