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Use error_position instead of error pointer internally

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This commit is contained in:
Max Bruckner 2017-03-22 00:50:32 +01:00
parent 770e8263a5
commit 56a32f9ecc
1 changed files with 25 additions and 7 deletions
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32
cJSON.c
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@ -40,11 +40,15 @@
#define true ((cJSON_bool)1) #define true ((cJSON_bool)1)
#define false ((cJSON_bool)0) #define false ((cJSON_bool)0)
static const unsigned char *global_ep = NULL; typedef struct {
const unsigned char *json;
size_t position;
} error;
static error global_error = { NULL, 0 };
CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void) CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void)
{ {
return (const char*) global_ep; return (const char*) (global_error.json + global_error.position);
} }
/* This is a safeguard to prevent copy-pasters from using incompatible C and header files */ /* This is a safeguard to prevent copy-pasters from using incompatible C and header files */
@ -945,10 +949,11 @@ static parse_buffer *buffer_skip_whitespace(parse_buffer * const buffer)
CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *value, const char **return_parse_end, cJSON_bool require_null_terminated) CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *value, const char **return_parse_end, cJSON_bool require_null_terminated)
{ {
parse_buffer buffer; parse_buffer buffer;
/* use global error pointer if no specific one was given */
const unsigned char **error_pointer = (return_parse_end != NULL) ? (const unsigned char**)return_parse_end : &global_ep;
cJSON *item = NULL; cJSON *item = NULL;
*error_pointer = NULL;
/* reset error position */
global_error.json = NULL;
global_error.position = 0;
if (value == NULL) if (value == NULL)
{ {
@ -995,13 +1000,26 @@ fail:
if (value != NULL) if (value != NULL)
{ {
error local_error;
local_error.json = (const unsigned char*)value;
local_error.position = 0;
if (buffer.offset < buffer.length) if (buffer.offset < buffer.length)
{ {
*error_pointer = buffer_at_offset(&buffer); local_error.position = buffer.offset;
} }
else if (buffer.length > 0) else if (buffer.length > 0)
{ {
*error_pointer = buffer.content + buffer.length - 1; local_error.position = buffer.length - 1;
}
if (return_parse_end != NULL)
{
*return_parse_end = (const char*)local_error.json + local_error.position;
}
else
{
global_error = local_error;
} }
} }