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comparison: mobile/android/base/jni-generator.py
mobile/android/base/jni-generator.py
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:b6e5366058cf |
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| 1 # This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 # License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 # file, You can obtain one at http://mozilla.org/MPL/2.0/. | |
| 4 | |
| 5 import argparse | |
| 6 import re | |
| 7 | |
| 8 STUB_TEMPLATE = ''' | |
| 9 typedef %(returnType)s (*%(functionName)s_t)(%(paramTypes)s); | |
| 10 static %(functionName)s_t f_%(functionName)s; | |
| 11 extern "C" NS_EXPORT %(returnType)s JNICALL | |
| 12 %(functionName)s(%(parameterList)s) { | |
| 13 if (!f_%(functionName)s) { | |
| 14 arg0->ThrowNew(arg0->FindClass("java/lang/UnsupportedOperationException"), | |
| 15 "JNI Function called before it was loaded"); | |
| 16 return %(returnValue)s; | |
| 17 } | |
| 18 %(returnKeyword)s f_%(functionName)s(%(arguments)s); | |
| 19 } | |
| 20 ''' | |
| 21 BINDING_TEMPLATE = ' xul_dlsym("%(functionName)s", &f_%(functionName)s);\n' | |
| 22 | |
| 23 | |
| 24 class Generator: | |
| 25 """ | |
| 26 Class to convert a javah-produced JNI stub file into stubs/bindings files | |
| 27 for inclusion into mozglue. | |
| 28 """ | |
| 29 def __init__(self, outputfile): | |
| 30 self.outputfile = outputfile | |
| 31 | |
| 32 def write(self, guard, stuff): | |
| 33 self.outputfile.write('#ifdef %s\n' % guard) | |
| 34 self.outputfile.write(stuff) | |
| 35 self.outputfile.write('#endif\n\n') | |
| 36 | |
| 37 def process(self, inputfile): | |
| 38 self.outputfile.write('/* WARNING - This file is autogenerated by ' | |
| 39 + 'mobile/android/base/jni-generator.py. ' | |
| 40 + 'Do not edit manually! */\n') | |
| 41 | |
| 42 # this matches lines such as: | |
| 43 # JNIEXPORT void JNICALL Java_org_mozilla_gecko_GeckoAppShell_onResume | |
| 44 # and extracts the return type and the function name | |
| 45 nameRegex = re.compile('''JNIEXPORT \s+ | |
| 46 (?P<returnType>\S+) \s+ | |
| 47 JNICALL \s+ | |
| 48 (?P<functionName>\S+)''', re.VERBOSE) | |
| 49 | |
| 50 # this matches lines such as: | |
| 51 # (JNIEnv *, jclass); | |
| 52 # and extracts everything within the parens; this will be split | |
| 53 # on commas to get the argument types. | |
| 54 paramsRegex = re.compile('\((.*)\);') | |
| 55 | |
| 56 for line in inputfile: | |
| 57 line = line.strip() | |
| 58 | |
| 59 match = re.match(nameRegex, line) | |
| 60 if match: | |
| 61 returnType = match.group('returnType') | |
| 62 functionName = match.group('functionName') | |
| 63 | |
| 64 match = re.match(paramsRegex, line) | |
| 65 if match: | |
| 66 paramTypes = re.split('\s*,\s*', match.group(1)) | |
| 67 paramNames = ['arg%d' % i for i in range(0, len(paramTypes))] | |
| 68 if returnType == 'void': | |
| 69 returnValue = '' | |
| 70 elif returnType in ('jobject', 'jstring'): | |
| 71 returnValue = 'nullptr' | |
| 72 elif returnType in ('jint', 'jfloat', 'jdouble', 'jlong'): | |
| 73 returnValue = '0' | |
| 74 elif returnType == 'jboolean': | |
| 75 returnValue = 'false' | |
| 76 else: | |
| 77 raise Exception(('Unsupported JNI return type %s found; ' | |
| 78 + 'please update mobile/android/base/' | |
| 79 + 'jni-generator.py to handle this case!') | |
| 80 % returnType) | |
| 81 | |
| 82 self.write('JNI_STUBS', STUB_TEMPLATE % { | |
| 83 'returnType': returnType, | |
| 84 'functionName': functionName, | |
| 85 'paramTypes': ', '.join(paramTypes), | |
| 86 'parameterList': ', '.join('%s %s' % param | |
| 87 for param in zip(paramTypes, paramNames)), | |
| 88 'arguments': ', '.join(paramNames), | |
| 89 'returnValue': returnValue, | |
| 90 'returnKeyword': 'return' if returnType != 'void' else ''}) | |
| 91 self.write('JNI_BINDINGS', BINDING_TEMPLATE % { | |
| 92 'functionName': functionName}) | |
| 93 | |
| 94 | |
| 95 def main(): | |
| 96 parser = argparse.ArgumentParser( | |
| 97 description='Generate mozglue bindings for JNI functions.') | |
| 98 parser.add_argument('inputfile', type=argparse.FileType('r')) | |
| 99 parser.add_argument('outputfile', type=argparse.FileType('w')) | |
| 100 args = parser.parse_args() | |
| 101 gen = Generator(args.outputfile) | |
| 102 try: | |
| 103 gen.process(args.inputfile) | |
| 104 finally: | |
| 105 args.outputfile.close() | |
| 106 args.inputfile.close() | |
| 107 | |
| 108 if __name__ == '__main__': | |
| 109 main() |
