#! /usr/bin/env python3
"""Transform gprof(1) output into useful HTML."""
import html
import os
import re
import sys
import webbrowser
header = """\
gprof output (%s)
"""
trailer = """\
"""
def add_escapes(filename):
with open(filename, encoding="utf-8") as fp:
for line in fp:
yield html.escape(line)
def gprof2html(input, output, filename):
output.write(header % filename)
for line in input:
output.write(line)
if line.startswith(" time"):
break
labels = {}
for line in input:
m = re.match(r"(.* )(\w+)\n", line)
if not m:
output.write(line)
break
stuff, fname = m.group(1, 2)
labels[fname] = fname
output.write('%s%s\n' %
(stuff, fname, fname, fname))
for line in input:
output.write(line)
if line.startswith("index % time"):
break
for line in input:
m = re.match(r"(.* )(\w+)(( <cycle.*>)? \[\d+\])\n", line)
if not m:
output.write(line)
if line.startswith("Index by function name"):
break
continue
prefix, fname, suffix = m.group(1, 2, 3)
if fname not in labels:
output.write(line)
continue
if line.startswith("["):
output.write('%s%s%s\n' %
(prefix, fname, fname, fname, suffix))
else:
output.write('%s%s%s\n' %
(prefix, fname, fname, suffix))
for line in input:
for part in re.findall(r"(\w+(?:\.c)?|\W+)", line):
if part in labels:
part = '%s' % (part, part)
output.write(part)
output.write(trailer)
def main():
filename = "gprof.out"
if sys.argv[1:]:
filename = sys.argv[1]
outputfilename = filename + ".html"
input = add_escapes(filename)
with open(outputfilename, "w", encoding="utf-8") as output:
gprof2html(input, output, filename)
webbrowser.open("file:" + os.path.abspath(outputfilename))
if __name__ == '__main__':
main()