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"""JSON token scanner |
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""" |
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import re |
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__all__ = ['HjsonDecodeError'] |
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class HjsonDecodeError(ValueError): |
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"""Subclass of ValueError with the following additional properties: |
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msg: The unformatted error message |
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doc: The JSON document being parsed |
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pos: The start index of doc where parsing failed |
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end: The end index of doc where parsing failed (may be None) |
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lineno: The line corresponding to pos |
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colno: The column corresponding to pos |
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endlineno: The line corresponding to end (may be None) |
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endcolno: The column corresponding to end (may be None) |
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""" |
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def __init__(self, msg, doc, pos, end=None): |
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ValueError.__init__(self, errmsg(msg, doc, pos, end=end)) |
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self.msg = msg |
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self.doc = doc |
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self.pos = pos |
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self.end = end |
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self.lineno, self.colno = linecol(doc, pos) |
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if end is not None: |
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self.endlineno, self.endcolno = linecol(doc, end) |
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else: |
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self.endlineno, self.endcolno = None, None |
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def __reduce__(self): |
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return self.__class__, (self.msg, self.doc, self.pos, self.end) |
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def linecol(doc, pos): |
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lineno = doc.count('\n', 0, pos) + 1 |
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if lineno == 1: |
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colno = pos + 1 |
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else: |
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colno = pos - doc.rindex('\n', 0, pos) |
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return lineno, colno |
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def errmsg(msg, doc, pos, end=None): |
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lineno, colno = linecol(doc, pos) |
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msg = msg.replace('%r', repr(doc[pos:pos + 1])) |
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if end is None: |
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fmt = '%s: line %d column %d (char %d)' |
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return fmt % (msg, lineno, colno, pos) |
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endlineno, endcolno = linecol(doc, end) |
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fmt = '%s: line %d column %d - line %d column %d (char %d - %d)' |
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return fmt % (msg, lineno, colno, endlineno, endcolno, pos, end) |
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