moved trivialjson to a separate file

1 files changed, 109 insertions, 0 deletions

diff --git a/youtube_dl/trivialjson.py b/youtube_dl/trivialjson.py
new file mode 100644
index 000000000..7cce2a98f
--- /dev/null
+++ b/youtube_dl/trivialjson.py
@@ -0,0 +1,109 @@
+"""trivialjson (https://github.com/phihag/trivialjson)"""
+
+import re
+def loads(s):
+	s = s.decode('UTF-8')
+	def raiseError(msg, i):
+		raise ValueError(msg + ' at position ' + str(i) + ' of ' + repr(s) + ': ' + repr(s[i:]))
+	def skipSpace(i, expectMore=True):
+		while i < len(s) and s[i] in ' \t\r\n':
+			i += 1
+		if expectMore:
+			if i >= len(s):
+				raiseError('Premature end', i)
+		return i
+	def decodeEscape(match):
+		esc = match.group(1)
+		_STATIC = {
+			'"': '"',
+			'\\': '\\',
+			'/': '/',
+			'b': unichr(0x8),
+			'f': unichr(0xc),
+			'n': '\n',
+			'r': '\r',
+			't': '\t',
+		}
+		if esc in _STATIC:
+			return _STATIC[esc]
+		if esc[0] == 'u':
+			if len(esc) == 1+4:
+				return unichr(int(esc[1:5], 16))
+			if len(esc) == 5+6 and esc[5:7] == '\\u':
+				hi = int(esc[1:5], 16)
+				low = int(esc[7:11], 16)
+				return unichr((hi - 0xd800) * 0x400 + low - 0xdc00 + 0x10000)
+		raise ValueError('Unknown escape ' + str(esc))
+	def parseString(i):
+		i += 1
+		e = i
+		while True:
+			e = s.index('"', e)
+			bslashes = 0
+			while s[e-bslashes-1] == '\\':
+				bslashes += 1
+			if bslashes % 2 == 1:
+				e += 1
+				continue
+			break
+		rexp = re.compile(r'\\(u[dD][89aAbB][0-9a-fA-F]{2}\\u[0-9a-fA-F]{4}|u[0-9a-fA-F]{4}|.|$)')
+		stri = rexp.sub(decodeEscape, s[i:e])
+		return (e+1,stri)
+	def parseObj(i):
+		i += 1
+		res = {}
+		i = skipSpace(i)
+		if s[i] == '}': # Empty dictionary
+			return (i+1,res)
+		while True:
+			if s[i] != '"':
+				raiseError('Expected a string object key', i)
+			i,key = parseString(i)
+			i = skipSpace(i)
+			if i >= len(s) or s[i] != ':':
+				raiseError('Expected a colon', i)
+			i,val = parse(i+1)
+			res[key] = val
+			i = skipSpace(i)
+			if s[i] == '}':
+				return (i+1, res)
+			if s[i] != ',':
+				raiseError('Expected comma or closing curly brace', i)
+			i = skipSpace(i+1)
+	def parseArray(i):
+		res = []
+		i = skipSpace(i+1)
+		if s[i] == ']': # Empty array
+			return (i+1,res)
+		while True:
+			i,val = parse(i)
+			res.append(val)
+			i = skipSpace(i) # Raise exception if premature end
+			if s[i] == ']':
+				return (i+1, res)
+			if s[i] != ',':
+				raiseError('Expected a comma or closing bracket', i)
+			i = skipSpace(i+1)
+	def parseDiscrete(i):
+		for k,v in {'true': True, 'false': False, 'null': None}.items():
+			if s.startswith(k, i):
+				return (i+len(k), v)
+		raiseError('Not a boolean (or null)', i)
+	def parseNumber(i):
+		mobj = re.match('^(-?(0|[1-9][0-9]*)(\.[0-9]*)?([eE][+-]?[0-9]+)?)', s[i:])
+		if mobj is None:
+			raiseError('Not a number', i)
+		nums = mobj.group(1)
+		if '.' in nums or 'e' in nums or 'E' in nums:
+			return (i+len(nums), float(nums))
+		return (i+len(nums), int(nums))
+	CHARMAP = {'{': parseObj, '[': parseArray, '"': parseString, 't': parseDiscrete, 'f': parseDiscrete, 'n': parseDiscrete}
+	def parse(i):
+		i = skipSpace(i)
+		i,res = CHARMAP.get(s[i], parseNumber)(i)
+		i = skipSpace(i, False)
+		return (i,res)
+	i,res = parse(0)
+	if i < len(s):
+		raise ValueError('Extra data at end of input (index ' + str(i) + ' of ' + repr(s) + ': ' + repr(s[i:]) + ')')
+	return res