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parse_functions: Return booleans instead of pointers

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This commit is contained in:
Max Bruckner
2017-03-14 14:17:35 +01:00
parent c9739c59fd
commit 87a204ed0b
9 changed files with 41 additions and 48 deletions
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67
cJSON.c
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@ -202,7 +202,7 @@ typedef struct
#define buffer_at_offset(buffer) ((buffer)->content + (buffer)->offset)
/* Parse the input text to generate a number, and populate the result into item. */
static const unsigned char *parse_number(cJSON * const item, parse_buffer * const input_buffer)
static cJSON_bool parse_number(cJSON * const item, parse_buffer * const input_buffer)
{
double number = 0;
unsigned char *after_end = NULL;
@ -212,7 +212,7 @@ static const unsigned char *parse_number(cJSON * const item, parse_buffer * cons
if ((input_buffer == NULL) || (input_buffer->content == NULL))
{
return NULL;
return false;
}
/* copy the number into a temporary buffer and replace '.' with the decimal point
@ -253,7 +253,7 @@ loop_end:
number = strtod((const char*)number_c_string, (char**)&after_end);
if (number_c_string == after_end)
{
return NULL; /* parse_error */
return false; /* parse_error */
}
item->valuedouble = number;
@ -275,7 +275,7 @@ loop_end:
item->type = cJSON_Number;
input_buffer->offset += (size_t)(after_end - number_c_string);
return buffer_at_offset(input_buffer);
return true;
}
/* don't ask me, but the original cJSON_SetNumberValue returns an integer or double */
@ -662,7 +662,7 @@ fail:
}
/* Parse the input text into an unescaped cinput, and populate item. */
static const unsigned char *parse_string(cJSON * const item, parse_buffer * const input_buffer, const unsigned char ** const error_pointer, const internal_hooks * const hooks)
static cJSON_bool parse_string(cJSON * const item, parse_buffer * const input_buffer, const unsigned char ** const error_pointer, const internal_hooks * const hooks)
{
const unsigned char *input_pointer = buffer_at_offset(input_buffer) + 1;
const unsigned char *input_end = buffer_at_offset(input_buffer) + 1;
@ -776,7 +776,7 @@ static const unsigned char *parse_string(cJSON * const item, parse_buffer * cons
input_buffer->offset = (size_t) (input_end - input_buffer->content);
input_buffer->offset++;
return buffer_at_offset(input_buffer);
return true;
fail:
if (output != NULL)
@ -784,7 +784,7 @@ fail:
hooks->deallocate(output);
}
return NULL;
return false;
}
/* Render the cstring provided to an escaped version that can be printed. */
@ -916,11 +916,11 @@ static cJSON_bool print_string(const cJSON * const item, printbuffer * const p,
}
/* Predeclare these prototypes. */
static const unsigned char *parse_value(cJSON * const item, parse_buffer * const input_buffer, const unsigned char ** const ep, const internal_hooks * const hooks);
static cJSON_bool parse_value(cJSON * const item, parse_buffer * const input_buffer, const unsigned char ** const ep, const internal_hooks * const hooks);
static cJSON_bool print_value(const cJSON * const item, const size_t depth, const cJSON_bool format, printbuffer * const output_buffer, const internal_hooks * const hooks);
static const unsigned char *parse_array(cJSON * const item, parse_buffer * const input_buffer, const unsigned char ** const ep, const internal_hooks * const hooks);
static cJSON_bool parse_array(cJSON * const item, parse_buffer * const input_buffer, const unsigned char ** const ep, const internal_hooks * const hooks);
static cJSON_bool print_array(const cJSON * const item, const size_t depth, const cJSON_bool format, printbuffer * const output_buffer, const internal_hooks * const hooks);
static const unsigned char *parse_object(cJSON * const item, parse_buffer * const input_buffer, const unsigned char ** const ep, const internal_hooks * const hooks);
static cJSON_bool parse_object(cJSON * const item, parse_buffer * const input_buffer, const unsigned char ** const ep, const internal_hooks * const hooks);
static cJSON_bool print_object(const cJSON * const item, const size_t depth, const cJSON_bool format, printbuffer * const output_buffer, const internal_hooks * const hooks);
/* Utility to jump whitespace and cr/lf */
@ -980,13 +980,14 @@ CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *value, const char **return
buffer.length = strlen((const char*)value) + sizeof("");
buffer.offset = 0;
end = parse_value(item, buffer_skip_whitespace(&buffer), error_pointer, &global_hooks);
if (end == NULL)
if (!parse_value(item, buffer_skip_whitespace(&buffer), error_pointer, &global_hooks))
{
/* parse failure. ep is set. */
goto fail;
}
end = buffer_at_offset(&buffer);
/* if we require null-terminated JSON without appended garbage, skip and then check for a null terminator */
if (require_null_terminated)
{
@ -1125,12 +1126,11 @@ CJSON_PUBLIC(cJSON_bool) cJSON_PrintPreallocated(cJSON *item, char *buf, const i
}
/* Parser core - when encountering text, process appropriately. */
static const unsigned char *parse_value(cJSON * const item, parse_buffer * const input_buffer, const unsigned char ** const error_pointer, const internal_hooks * const hooks)
static cJSON_bool parse_value(cJSON * const item, parse_buffer * const input_buffer, const unsigned char ** const error_pointer, const internal_hooks * const hooks)
{
const unsigned char *content_pointer = NULL;
if ((input_buffer == NULL) || (input_buffer->content == NULL))
{
return NULL; /* no input */
return false; /* no input */
}
/* parse the different types of values */
@ -1139,14 +1139,14 @@ static const unsigned char *parse_value(cJSON * const item, parse_buffer * cons
{
item->type = cJSON_NULL;
input_buffer->offset += 4;
return buffer_at_offset(input_buffer);
return true;
}
/* false */
if (can_read(input_buffer, 5) && (strncmp((const char*)buffer_at_offset(input_buffer), "false", 5) == 0))
{
item->type = cJSON_False;
input_buffer->offset += 5;
return buffer_at_offset(input_buffer);
return true;
}
/* true */
if (can_read(input_buffer, 4) && (strncmp((const char*)buffer_at_offset(input_buffer), "true", 4) == 0))
@ -1154,12 +1154,12 @@ static const unsigned char *parse_value(cJSON * const item, parse_buffer * cons
item->type = cJSON_True;
item->valueint = 1;
input_buffer->offset += 4;
return buffer_at_offset(input_buffer);
return true;
}
/* string */
if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '\"'))
{
return content_pointer = parse_string(item, input_buffer, error_pointer, hooks);
return parse_string(item, input_buffer, error_pointer, hooks);
}
/* number */
if (can_access_at_index(input_buffer, 0) && ((buffer_at_offset(input_buffer)[0] == '-') || ((buffer_at_offset(input_buffer)[0] >= '0') && (buffer_at_offset(input_buffer)[0] <= '9'))))
@ -1174,14 +1174,7 @@ static const unsigned char *parse_value(cJSON * const item, parse_buffer * cons
/* object */
if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '{'))
{
content_pointer = parse_object(item, input_buffer, error_pointer, hooks);
if (content_pointer == NULL)
{
return NULL;
}
input_buffer->offset = (size_t)(content_pointer - input_buffer->content);
return buffer_at_offset(input_buffer);
return parse_object(item, input_buffer, error_pointer, hooks);
}
/* failure. */
@ -1198,7 +1191,7 @@ static const unsigned char *parse_value(cJSON * const item, parse_buffer * cons
*error_pointer = input_buffer->content;
}
return NULL;
return false;
}
/* Render a value to text. */
@ -1280,7 +1273,7 @@ static cJSON_bool print_value(const cJSON * const item, const size_t depth, cons
}
/* Build an array from input text. */
static const unsigned char *parse_array(cJSON * const item, parse_buffer * const input_buffer, const unsigned char ** const error_pointer, const internal_hooks * const hooks)
static cJSON_bool parse_array(cJSON * const item, parse_buffer * const input_buffer, const unsigned char ** const error_pointer, const internal_hooks * const hooks)
{
cJSON *head = NULL; /* head of the linked list */
cJSON *current_item = NULL;
@ -1337,7 +1330,7 @@ static const unsigned char *parse_array(cJSON * const item, parse_buffer * const
/* parse next value */
input_buffer->offset++;
buffer_skip_whitespace(input_buffer);
if (parse_value(current_item, input_buffer, error_pointer, hooks) == NULL)
if (!parse_value(current_item, input_buffer, error_pointer, hooks))
{
goto fail; /* failed to parse value */
}
@ -1357,7 +1350,7 @@ success:
input_buffer->offset++;
return buffer_at_offset(input_buffer);
return true;
fail:
if (head != NULL)
@ -1365,7 +1358,7 @@ fail:
cJSON_Delete(head);
}
return NULL;
return false;
}
/* Render an array to text */
@ -1429,7 +1422,7 @@ static cJSON_bool print_array(const cJSON * const item, const size_t depth, cons
}
/* Build an object from the text. */
static const unsigned char *parse_object(cJSON * const item, parse_buffer * const input_buffer, const unsigned char ** const error_pointer, const internal_hooks * const hooks)
static cJSON_bool parse_object(cJSON * const item, parse_buffer * const input_buffer, const unsigned char ** const error_pointer, const internal_hooks * const hooks)
{
cJSON *head = NULL; /* linked list head */
cJSON *current_item = NULL;
@ -1484,7 +1477,7 @@ static const unsigned char *parse_object(cJSON * const item, parse_buffer * cons
/* parse the name of the child */
input_buffer->offset++;
buffer_skip_whitespace(input_buffer);
if (parse_string(current_item, input_buffer, error_pointer, hooks) == NULL)
if (!parse_string(current_item, input_buffer, error_pointer, hooks))
{
goto fail; /* faile to parse name */
}
@ -1503,7 +1496,7 @@ static const unsigned char *parse_object(cJSON * const item, parse_buffer * cons
/* parse the value */
input_buffer->offset++;
buffer_skip_whitespace(input_buffer);
if (parse_value(current_item, input_buffer, error_pointer, hooks) == NULL)
if (!parse_value(current_item, input_buffer, error_pointer, hooks))
{
goto fail; /* failed to parse value */
}
@ -1522,7 +1515,7 @@ success:
item->child = head;
input_buffer->offset++;
return buffer_at_offset(input_buffer);
return true;
fail:
if (head != NULL)
@ -1530,7 +1523,7 @@ fail:
cJSON_Delete(head);
}
return NULL;
return false;
}
/* Render an object to text. */