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#import "OFString+JSONValue.h"
#import "OFArray.h"
#import "OFDictionary.h"
#import "OFNumber.h"
#import "OFNull.h"
#import "OFInvalidEncodingException.h"
#import "OFInvalidJSONException.h"
#import "macros.h"
int _OFString_JSONValue_reference;
static id nextObject(const char *restrict *, const char*);
static id nextObject(const char *restrict *, const char*,
size_t *restrict line);
static void
skipWhitespaces(const char *restrict *pointer, const char *stop)
skipWhitespaces(const char *restrict *pointer, const char *stop,
size_t *restrict line)
{
while (*pointer < stop && (**pointer == ' ' || **pointer == '\t' ||
**pointer == '\r' || **pointer == '\n'))
**pointer == '\r' || **pointer == '\n')) {
if (**pointer == '\n')
(*line)++;
(*pointer)++;
}
}
static void
skipComment(const char *restrict *pointer, const char *stop)
skipComment(const char *restrict *pointer, const char *stop,
size_t *restrict line)
{
if (**pointer != '/')
return;
if (*pointer + 1 >= stop)
return;
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while (*pointer < stop) {
if (lastIsAsterisk && **pointer == '/') {
(*pointer)++;
return;
}
lastIsAsterisk = (**pointer == '*');
if (**pointer == '\n')
(*line)++;
(*pointer)++;
}
} else {
} else if (**pointer == '/') {
(*pointer)++;
while (*pointer < stop) {
if (**pointer == '\r' || **pointer == '\n') {
(*pointer)++;
(*line)++;
return;
}
(*pointer)++;
}
}
} else
(*pointer)--;
}
static void
skipWhitespacesAndComments(const char *restrict *pointer, const char *stop)
skipWhitespacesAndComments(const char *restrict *pointer, const char *stop,
size_t *restrict line)
{
const char *old = NULL;
while (old != *pointer) {
old = *pointer;
skipWhitespaces(pointer, stop);
skipComment(pointer, stop);
skipWhitespaces(pointer, stop, line);
skipComment(pointer, stop, line);
}
}
static inline uint16_t
parseUnicodeEscape(const char *pointer, const char *stop)
{
uint16_t ret = 0;
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* It is never possible to end with an identifier, thus we should never
* reach stop.
*/
return nil;
}
static inline OFMutableArray*
parseArray(const char *restrict *pointer, const char *stop)
parseArray(const char *restrict *pointer, const char *stop,
size_t *restrict line)
{
OFMutableArray *array = [OFMutableArray array];
if (++(*pointer) >= stop)
return nil;
while (**pointer != ']') {
id object;
skipWhitespacesAndComments(pointer, stop);
skipWhitespacesAndComments(pointer, stop, line);
if (*pointer >= stop)
return nil;
if (**pointer == ']')
break;
if (**pointer == ',') {
(*pointer)++;
skipWhitespacesAndComments(pointer, stop);
skipWhitespacesAndComments(pointer, stop, line);
if (*pointer >= stop || **pointer != ']')
return nil;
break;
}
if ((object = nextObject(pointer, stop)) == nil)
if ((object = nextObject(pointer, stop, line)) == nil)
return nil;
[array addObject: object];
skipWhitespacesAndComments(pointer, stop);
skipWhitespacesAndComments(pointer, stop, line);
if (*pointer >= stop)
return nil;
if (**pointer == ',') {
(*pointer)++;
skipWhitespacesAndComments(pointer, stop);
skipWhitespacesAndComments(pointer, stop, line);
if (*pointer >= stop)
return nil;
} else if (**pointer != ']')
return nil;
}
(*pointer)++;
return array;
}
static inline OFMutableDictionary*
parseDictionary(const char *restrict *pointer, const char *stop)
parseDictionary(const char *restrict *pointer, const char *stop,
size_t *restrict line)
{
OFMutableDictionary *dictionary = [OFMutableDictionary dictionary];
if (++(*pointer) >= stop)
return nil;
while (**pointer != '}') {
id key, object;
skipWhitespacesAndComments(pointer, stop);
skipWhitespacesAndComments(pointer, stop, line);
if (*pointer >= stop)
return nil;
if (**pointer == '}')
break;
if (**pointer == ',') {
(*pointer)++;
skipWhitespacesAndComments(pointer, stop);
skipWhitespacesAndComments(pointer, stop, line);
if (*pointer >= stop || **pointer != '}')
return nil;
break;
}
skipWhitespacesAndComments(pointer, stop);
skipWhitespacesAndComments(pointer, stop, line);
if (*pointer + 1 >= stop)
return nil;
if ((**pointer >= 'a' && **pointer <= 'z') ||
(**pointer >= 'A' && **pointer <= 'Z') ||
**pointer == '_' || **pointer == '$' || **pointer == '\\')
key = parseIdentifier(pointer, stop);
else
key = nextObject(pointer, stop);
key = nextObject(pointer, stop, line);
if (key == nil)
return nil;
skipWhitespacesAndComments(pointer, stop);
skipWhitespacesAndComments(pointer, stop, line);
if (*pointer + 1 >= stop || **pointer != ':')
return nil;
(*pointer)++;
if ((object = nextObject(pointer, stop)) == nil)
if ((object = nextObject(pointer, stop, line)) == nil)
return nil;
[dictionary setObject: object
forKey: key];
skipWhitespacesAndComments(pointer, stop);
skipWhitespacesAndComments(pointer, stop, line);
if (*pointer >= stop)
return nil;
if (**pointer == ',') {
(*pointer)++;
skipWhitespacesAndComments(pointer, stop);
skipWhitespacesAndComments(pointer, stop, line);
if (*pointer >= stop)
return nil;
} else if (**pointer != '}')
return nil;
}
(*pointer)++;
return dictionary;
}
static inline OFNumber*
parseNumber(const char *restrict *pointer, const char *stop)
parseNumber(const char *restrict *pointer, const char *stop,
size_t *restrict line)
{
BOOL isHex = (*pointer + 1 < stop && (*pointer)[1] == 'x');
BOOL hasDecimal = NO;
size_t i;
OFString *string;
OFNumber *number;
for (i = 0; *pointer + i < stop; i++) {
if ((*pointer)[i] == '.')
hasDecimal = YES;
if ((*pointer)[i] == ' ' || (*pointer)[i] == '\t' ||
(*pointer)[i] == '\r' || (*pointer)[i] == '\n' ||
(*pointer)[i] == ',' || (*pointer)[i] == ']' ||
(*pointer)[i] == '}')
(*pointer)[i] == '}') {
if ((*pointer)[i] == '\n')
(*line)++;
break;
}
}
string = [[OFString alloc] initWithUTF8String: *pointer
length: i];
*pointer += i;
@try {
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[string release];
}
return number;
}
static id
nextObject(const char *restrict *pointer, const char *stop)
nextObject(const char *restrict *pointer, const char *stop,
size_t *restrict line)
{
skipWhitespacesAndComments(pointer, stop);
skipWhitespacesAndComments(pointer, stop, line);
if (*pointer >= stop)
return nil;
switch (**pointer) {
case '"':
case '\'':
return parseString(pointer, stop);
return parseString(pointer, stop, line);
case '[':
return parseArray(pointer, stop);
return parseArray(pointer, stop, line);
case '{':
return parseDictionary(pointer, stop);
return parseDictionary(pointer, stop, line);
case 't':
if (*pointer + 3 >= stop)
return nil;
if (memcmp(*pointer, "true", 4))
return nil;
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case '5':
case '6':
case '7':
case '8':
case '9':
case '-':
case '.':
return parseNumber(pointer, stop);
return parseNumber(pointer, stop, line);
default:
return nil;
}
}
@implementation OFString (JSONValue)
- (id)JSONValue
{
const char *pointer = [self UTF8String];
const char *stop = pointer + [self UTF8StringLength];
id object;
size_t line = 1;
object = nextObject(&pointer, stop);
skipWhitespacesAndComments(&pointer, stop);
object = nextObject(&pointer, stop, &line);
skipWhitespacesAndComments(&pointer, stop, &line);
if (pointer < stop || object == nil)
@throw [OFInvalidEncodingException exceptionWithClass: isa];
@throw [OFInvalidJSONException exceptionWithClass: isa
line: line];
return object;
}
@end
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