parse profile output

ChangeLog

@@ -24,6 +24,7 @@
 - add --strip option to jpegsave
 - added vips_gaussblur() convenience function
 - added --vips-profile, records and dumps thread timing info 
+- added vipsprofile.py, visualises --vips-profile output
 
 15/11/13	started 7.36.4
 - improve compat with im_init_world()

TODO

@@ -1,3 +1,8 @@
+- seen some leaks from 
+
+	vips dzsave --layout google wtc.jpg x
+
+  investigate
 
 - parse and graph vips-profile data 
 

tools/vipsprofile.py

@@ -0,0 +1,68 @@
+#!/usr/bin/python
+
+import re
+
+class ReadFile:
+    def __init__(self, filename):
+        self.filename = filename
+
+    def __enter__(self):
+        self.f = open(self.filename, 'r') 
+        self.source = iter(self.f.readline, '')
+        self.lineno = 0
+        self.getnext();
+        return self
+
+    def __exit__(self, type, value, traceback):
+        self.f.close()
+        return isinstance(value, StopIteration)
+
+    def __nonzero__(self):
+        return self.line != ""
+
+    def getnext(self):
+        self.lineno += 1
+        self.line = self.source.next()
+
+def read_times(rf):
+    times = []
+
+    while True:
+        match = re.match('[0-9]+ ', rf.line)
+        if not match:
+            break
+        times.append([int(x) for x in re.split(' ', rf.line.rstrip())])
+        rf.getnext()
+
+    return times[::-1]
+
+with ReadFile('vips-profile.txt') as rf:
+    while rf:
+        match = re.match('thread: (.*) \(0x([0-9a-f]+)\)', rf.line)
+        if not match:
+            print 'parse error line %d, expected "thread"' % rf.lineno
+        thread_name = match.group(1)
+        thread_addr = match.group(2)
+        rf.getnext()
+
+        while True:
+            match = re.match('gate: (.*)', rf.line)
+            if not match:
+                break
+            gate_name = match.group(1)
+            rf.getnext()
+
+            match = re.match('start:', rf.line)
+            if not match:
+                continue
+            rf.getnext()
+
+            times = read_times(rf)
+
+            match = re.match('stop:', rf.line)
+            if not match:
+                continue
+            rf.getnext()
+
+            times = read_times(rf)
+