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-rw-r--r--yaml/lib/yaml/error.py75
1 files changed, 75 insertions, 0 deletions
diff --git a/yaml/lib/yaml/error.py b/yaml/lib/yaml/error.py
new file mode 100644
index 0000000000..577686db5f
--- /dev/null
+++ b/yaml/lib/yaml/error.py
@@ -0,0 +1,75 @@
+
+__all__ = ['Mark', 'YAMLError', 'MarkedYAMLError']
+
+class Mark(object):
+
+ def __init__(self, name, index, line, column, buffer, pointer):
+ self.name = name
+ self.index = index
+ self.line = line
+ self.column = column
+ self.buffer = buffer
+ self.pointer = pointer
+
+ def get_snippet(self, indent=4, max_length=75):
+ if self.buffer is None:
+ return None
+ head = ''
+ start = self.pointer
+ while start > 0 and self.buffer[start-1] not in u'\0\r\n\x85\u2028\u2029':
+ start -= 1
+ if self.pointer-start > max_length/2-1:
+ head = ' ... '
+ start += 5
+ break
+ tail = ''
+ end = self.pointer
+ while end < len(self.buffer) and self.buffer[end] not in u'\0\r\n\x85\u2028\u2029':
+ end += 1
+ if end-self.pointer > max_length/2-1:
+ tail = ' ... '
+ end -= 5
+ break
+ snippet = self.buffer[start:end].encode('utf-8')
+ return ' '*indent + head + snippet + tail + '\n' \
+ + ' '*(indent+self.pointer-start+len(head)) + '^'
+
+ def __str__(self):
+ snippet = self.get_snippet()
+ where = " in \"%s\", line %d, column %d" \
+ % (self.name, self.line+1, self.column+1)
+ if snippet is not None:
+ where += ":\n"+snippet
+ return where
+
+class YAMLError(Exception):
+ pass
+
+class MarkedYAMLError(YAMLError):
+
+ def __init__(self, context=None, context_mark=None,
+ problem=None, problem_mark=None, note=None):
+ self.context = context
+ self.context_mark = context_mark
+ self.problem = problem
+ self.problem_mark = problem_mark
+ self.note = note
+
+ def __str__(self):
+ lines = []
+ if self.context is not None:
+ lines.append(self.context)
+ if self.context_mark is not None \
+ and (self.problem is None or self.problem_mark is None
+ or self.context_mark.name != self.problem_mark.name
+ or self.context_mark.line != self.problem_mark.line
+ or self.context_mark.column != self.problem_mark.column):
+ lines.append(str(self.context_mark))
+ if self.problem is not None:
+ lines.append(self.problem)
+ if self.problem_mark is not None:
+ lines.append(str(self.problem_mark))
+ if self.note is not None:
+ lines.append(self.note)
+ return '\n'.join(lines)
+