Include module for desktop build

libs/pyutil/strutil.py

@@ -0,0 +1,48 @@
+# Copyright (c) 2002-2010 Zooko Wilcox-O'Hearn
+#  This file is part of pyutil; see README.rst for licensing terms.
+
+def commonprefix(l):
+    cp = []
+    for i in range(min(map(len, l))):
+        c = l[0][i]
+        for s in l[1:]:
+            if s[i] != c:
+                return ''.join(cp)
+        cp.append(c)
+    return ''.join(cp)
+
+def commonsuffix(l):
+    cp = []
+    for i in range(min(map(len, l))):
+        c = l[0][-i-1]
+        for s in l[1:]:
+            if s[-i-1] != c:
+                cp.reverse()
+                return ''.join(cp)
+        cp.append(c)
+    cp.reverse()
+    return ''.join(cp)
+
+def split_on_newlines(s):
+    """
+    Splits s on all of the three newline sequences: "\r\n", "\r", or "\n".
+    """
+    res = []
+    for x in s.split('\r\n'):
+        for y in x.split('\r'):
+           res.extend(y.split('\n'))
+    return res
+
+def pop_trailing_newlines(s):
+    """
+    @return a copy of s minus any trailing "\n"'s or "\r"'s
+    """
+    i = len(s)-1
+    if i < 0:
+        return ''
+    while s[i] in ('\n', '\r',):
+        i = i - 1
+        if i < 0:
+            return ''
+    return s[:i+1]
+