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#!/usr/bin/python
#
# Fix a few errors from Emscripten output (stopgap until emscripten mainline
# is updated).
import os
import sys
fix_count = 0
replacements = {
# RegExp fix, now fixed in the Emscripten repository and should no longer
# be necessary.
# https://github.com/kripken/emscripten/commit/277ac5239057721ebe3c6e7813dc478eeab2cea0
r"""if (/<?{ ?[^}]* ?}>?/.test(type)) return true""":
r"""if (/<?\{ ?[^}]* ?\}>?/.test(type)) return true""",
# GH-11: Another RegExp escaping fix.
r"""var sourceRegex = /^function\s\(([^)]*)\)\s*{\s*([^*]*?)[\s;]*(?:return\s*(.*?)[;\s]*)?}$/;""":
r"""var sourceRegex = /^function\s\(([^)]*)\)\s*\{\s*([^*]*?)[\s;]*(?:return\s*(.*?)[;\s]*)?\}$/;""",
r"""var sourceRegex = /^function\s*\(([^)]*)\)\s*{\s*([^*]*?)[\s;]*(?:return\s*(.*?)[;\s]*)?}$/;""":
r"""var sourceRegex = /^function\s*\(([^)]*)\)\s*\{\s*([^*]*?)[\s;]*(?:return\s*(.*?)[;\s]*)?\}$/;""",
# GH-11: Attempt to parse a function's toString() output with a RegExp.
# The RegExp makes invalid assumptions and won't parse Duktape's function
# toString output ("function empty() {/* source code*/)}").
# This stopgap will prevent a 'TypeError: invalid base reference for property read'
# and allows at least a hello world to run.
r"""var parsed = jsfunc.toString().match(sourceRegex).slice(1);""":
r"""var parsed = (jsfunc.toString().match(sourceRegex) || []).slice(1);""",
r"""jsfunc.toString().match(sourceRegex).slice(1);""":
r"""(jsfunc.toString().match(sourceRegex) || []).slice(1);""",
# Newer emscripten has this at least with -O2
r"""/^function\s*\(([^)]*)\)\s*{\s*([^*]*?)[\s;]*(?:return\s*(.*?)[;\s]*)?}$/""":
r"""/^function\s*\(([^)]*)\)\s*\{\s*([^*]*?)[\s;]*(?:return\s*(.*?)[;\s]*)?\}$/""",
}
repl_keys = replacements.keys()
repl_keys.sort()
for line in sys.stdin:
if len(line) > 1 and line[-1] == '\n':
line = line[:-1]
for k in repl_keys:
line_fix = line.replace(k, replacements[k])
if line_fix != line:
fix_count += 1
line = line_fix
print(line)
if fix_count > 0:
sys.stderr.write('Emscripten fixes needed (fix_emscripten.py): fix_count=%d\n' % fix_count)
sys.stderr.flush()