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Add compare_strings: configurable case_sensitivity

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This commit is contained in:
Max Bruckner 2017-04-30 19:13:16 +02:00
parent 23cbb173d4
commit 2616db9e92
1 changed files with 14 additions and 9 deletions
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23
cJSON_Utils.c
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@ -50,8 +50,8 @@ static unsigned char* cJSONUtils_strdup(const unsigned char* const string)
return copy; return copy;
} }
/* Case insensitive string comparison, doesn't consider two NULL pointers equal though */ /* string comparison which doesn't consider NULL pointers equal */
static int case_insensitive_strcmp(const unsigned char *string1, const unsigned char *string2) static int compare_strings(const unsigned char *string1, const unsigned char *string2, const cJSON_bool case_sensitive)
{ {
if ((string1 == NULL) || (string2 == NULL)) if ((string1 == NULL) || (string2 == NULL))
{ {
@ -63,6 +63,11 @@ static int case_insensitive_strcmp(const unsigned char *string1, const unsigned
return 0; return 0;
} }
if (case_sensitive)
{
return strcmp((const char*)string1, (const char*)string2);
}
for(; tolower(*string1) == tolower(*string2); (void)string1++, string2++) for(; tolower(*string1) == tolower(*string2); (void)string1++, string2++)
{ {
if (*string1 == '\0') if (*string1 == '\0')
@ -432,7 +437,7 @@ static cJSON_bool compare_json(cJSON *a, cJSON *b)
case cJSON_String: case cJSON_String:
/* string mismatch. */ /* string mismatch. */
if (strcmp(a->valuestring, b->valuestring) != 0) if (compare_strings((unsigned char*)a->valuestring, (unsigned char*)b->valuestring, true) != 0)
{ {
return false; return false;
} }
@ -468,7 +473,7 @@ static cJSON_bool compare_json(cJSON *a, cJSON *b)
{ {
cJSON_bool identical = false; cJSON_bool identical = false;
/* compare object keys */ /* compare object keys */
if (case_insensitive_strcmp((unsigned char*)a->string, (unsigned char*)b->string)) if (compare_strings((unsigned char*)a->string, (unsigned char*)b->string, false))
{ {
/* missing member */ /* missing member */
return false; return false;
@ -909,7 +914,7 @@ static void create_patches(cJSON * const patches, const unsigned char * const pa
return; return;
case cJSON_String: case cJSON_String:
if (strcmp(from->valuestring, to->valuestring) != 0) if (compare_strings((unsigned char*)from->valuestring, (unsigned char*)to->valuestring, true) != 0)
{ {
compose_patch(patches, (const unsigned char*)"replace", path, NULL, to); compose_patch(patches, (const unsigned char*)"replace", path, NULL, to);
} }
@ -983,7 +988,7 @@ static void create_patches(cJSON * const patches, const unsigned char * const pa
} }
else else
{ {
diff = case_insensitive_strcmp((unsigned char*)from_child->string, (unsigned char*)to_child->string); diff = compare_strings((unsigned char*)from_child->string, (unsigned char*)to_child->string, false);
} }
if (diff == 0) if (diff == 0)
@ -1049,7 +1054,7 @@ static cJSON *sort_list(cJSON *list)
return result; return result;
} }
while ((current_item != NULL) && (current_item->next != NULL) && (case_insensitive_strcmp((unsigned char*)current_item->string, (unsigned char*)current_item->next->string) < 0)) while ((current_item != NULL) && (current_item->next != NULL) && (compare_strings((unsigned char*)current_item->string, (unsigned char*)current_item->next->string, false) < 0))
{ {
/* Test for list sorted. */ /* Test for list sorted. */
current_item = current_item->next; current_item = current_item->next;
@ -1088,7 +1093,7 @@ static cJSON *sort_list(cJSON *list)
while ((first != NULL) && (second != NULL)) while ((first != NULL) && (second != NULL))
{ {
cJSON *smaller = NULL; cJSON *smaller = NULL;
if (case_insensitive_strcmp((unsigned char*)first->string, (unsigned char*)second->string) < 0) if (compare_strings((unsigned char*)first->string, (unsigned char*)second->string, false) < 0)
{ {
smaller = first; smaller = first;
} }
@ -1213,7 +1218,7 @@ CJSON_PUBLIC(cJSON *) cJSONUtils_GenerateMergePatch(cJSON * const from, cJSON *
{ {
if (to_child != NULL) if (to_child != NULL)
{ {
diff = strcmp(from_child->string, to_child->string); diff = compare_strings((unsigned char*)from_child->string, (unsigned char*)to_child->string, true);
} }
else else
{ {