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simplify and rename cJSON_strcasecmp

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Two NULL strings should not be considered equal for the purpose of
cJSON.
This commit is contained in:
Max Bruckner 2017-04-05 19:30:06 +02:00
parent 31400affab
commit e9803341d5
1 changed files with 9 additions and 15 deletions
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28
cJSON.c
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@ -70,25 +70,19 @@ CJSON_PUBLIC(const char*) cJSON_Version(void)
return version; return version;
} }
/* case insensitive strcmp */ /* Case insensitive string comparison, doesn't consider two NULL pointers equal though */
static int cJSON_strcasecmp(const unsigned char *string1, const unsigned char *string2) static int case_insensitive_strcmp(const unsigned char *string1, const unsigned char *string2)
{ {
if (string1 == NULL) if ((string1 == NULL) || (string2 == NULL))
{ {
if (string2 == NULL) return 1;
}
if (string1 == string2)
{ {
/* both NULL */
return 0; return 0;
} }
return 1;
}
if (string2 == NULL)
{
return 1;
}
for(; tolower(*string1) == tolower(*string2); (void)string1++, string2++) for(; tolower(*string1) == tolower(*string2); (void)string1++, string2++)
{ {
if (*string1 == '\0') if (*string1 == '\0')
@ -97,7 +91,7 @@ static int cJSON_strcasecmp(const unsigned char *string1, const unsigned char *s
} }
} }
return tolower(string1[0]) - tolower(string2[0]); return tolower(*string1) - tolower(*string2);
} }
typedef struct internal_hooks typedef struct internal_hooks
@ -1686,7 +1680,7 @@ CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int item)
CJSON_PUBLIC(cJSON *) cJSON_GetObjectItem(const cJSON *object, const char *string) CJSON_PUBLIC(cJSON *) cJSON_GetObjectItem(const cJSON *object, const char *string)
{ {
cJSON *c = object ? object->child : NULL; cJSON *c = object ? object->child : NULL;
while (c && cJSON_strcasecmp((unsigned char*)c->string, (const unsigned char*)string)) while (c && !case_insensitive_strcmp((unsigned char*)c->string, (const unsigned char*)string))
{ {
c = c->next; c = c->next;
} }
@ -1860,7 +1854,7 @@ CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObject(cJSON *object, const char *stri
{ {
size_t i = 0; size_t i = 0;
cJSON *c = object->child; cJSON *c = object->child;
while (c && cJSON_strcasecmp((unsigned char*)c->string, (const unsigned char*)string)) while (c && !case_insensitive_strcmp((unsigned char*)c->string, (const unsigned char*)string))
{ {
i++; i++;
c = c->next; c = c->next;
@ -1948,7 +1942,7 @@ CJSON_PUBLIC(void) cJSON_ReplaceItemInObject(cJSON *object, const char *string,
{ {
size_t i = 0; size_t i = 0;
cJSON *c = object->child; cJSON *c = object->child;
while(c && cJSON_strcasecmp((unsigned char*)c->string, (const unsigned char*)string)) while(c && !case_insensitive_strcmp((unsigned char*)c->string, (const unsigned char*)string))
{ {
i++; i++;
c = c->next; c = c->next;