Mercurial > cpython-lru_cache-weakref

annotate Tools/scripts/h2py.py @ 70817:dd775b1561ba

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Fix markup.
author Georg Brandl <georg@python.org>
date Tue, 14 Jun 2011 21:09:55 +0200
parents 3c9232a684ae
children 039e17133391
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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fcfe324663a6 convert shebang lines: python -> python3
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1 #! /usr/bin/env python3
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2
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3 # Read #define's and translate to Python code.
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4 # Handle #include statements.
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5 # Handle #define macros with one argument.
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6 # Anything that isn't recognized or doesn't translate into valid
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7 # Python is ignored.
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8
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9 # Without filename arguments, acts as a filter.
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10 # If one or more filenames are given, output is written to corresponding
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11 # filenames in the local directory, translated to all uppercase, with
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12 # the extension replaced by ".py".
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13
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14 # By passing one or more options of the form "-i regular_expression"
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15 # you can specify additional strings to be ignored. This is useful
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16 # e.g. to ignore casts to u_long: simply specify "-i '(u_long)'".
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17
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18 # XXX To do:
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19 # - turn trailing C comments into Python comments
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20 # - turn C Boolean operators "&& || !" into Python "and or not"
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21 # - what to do about #if(def)?
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22 # - what to do about macros with multiple parameters?
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23
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24 import sys, re, getopt, os
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25
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26 p_define = re.compile('^[\t ]*#[\t ]*define[\t ]+([a-zA-Z0-9_]+)[\t ]+')
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27
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28 p_macro = re.compile(
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29 '^[\t ]*#[\t ]*define[\t ]+'
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30 '([a-zA-Z0-9_]+)\(([_a-zA-Z][_a-zA-Z0-9]*)\)[\t ]+')
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31
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32 p_include = re.compile('^[\t ]*#[\t ]*include[\t ]+<([a-zA-Z0-9_/\.]+)')
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33
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34 p_comment = re.compile(r'/\*([^*]+|\*+[^/])*(\*+/)?')
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35 p_cpp_comment = re.compile('//.*')
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36
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37 ignores = [p_comment, p_cpp_comment]
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38
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39 p_char = re.compile(r"'(\\.[^\\]*|[^\\])'")
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40
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41 p_hex = re.compile(r"0x([0-9a-fA-F]+)L?")
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42
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43 filedict = {}
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44 importable = {}
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45
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46 try:
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47 searchdirs=os.environ['include'].split(';')
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48 except KeyError:
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49 try:
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50 searchdirs=os.environ['INCLUDE'].split(';')
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51 except KeyError:
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52 searchdirs=['/usr/include']
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53
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54 def main():
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55 global filedict
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56 opts, args = getopt.getopt(sys.argv[1:], 'i:')
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57 for o, a in opts:
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58 if o == '-i':
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59 ignores.append(re.compile(a))
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60 if not args:
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61 args = ['-']
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62 for filename in args:
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63 if filename == '-':
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64 sys.stdout.write('# Generated by h2py from stdin\n')
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65 process(sys.stdin, sys.stdout)
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66 else:
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67 fp = open(filename, 'r')
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68 outfile = os.path.basename(filename)
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69 i = outfile.rfind('.')
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70 if i > 0: outfile = outfile[:i]
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71 modname = outfile.upper()
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72 outfile = modname + '.py'
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73 outfp = open(outfile, 'w')
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74 outfp.write('# Generated by h2py from %s\n' % filename)
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75 filedict = {}
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76 for dir in searchdirs:
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77 if filename[:len(dir)] == dir:
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78 filedict[filename[len(dir)+1:]] = None # no '/' trailing
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79 importable[filename[len(dir)+1:]] = modname
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80 break
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81 process(fp, outfp)
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82 outfp.close()
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83 fp.close()
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84
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85 def pytify(body):
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86 # replace ignored patterns by spaces
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87 for p in ignores:
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88 body = p.sub(' ', body)
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89 # replace char literals by ord(...)
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90 body = p_char.sub("ord('\\1')", body)
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91 # Compute negative hexadecimal constants
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92 start = 0
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93 UMAX = 2*(sys.maxsize+1)
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94 while 1:
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95 m = p_hex.search(body, start)
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96 if not m: break
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97 s,e = m.span()
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98 val = int(body[slice(*m.span(1))], 16)
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99 if val > sys.maxsize:
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100 val -= UMAX
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101 body = body[:s] + "(" + str(val) + ")" + body[e:]
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102 start = s + 1
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103 return body
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104
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105 def process(fp, outfp, env = {}):
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106 lineno = 0
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107 while 1:
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108 line = fp.readline()
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109 if not line: break
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110 lineno = lineno + 1
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111 match = p_define.match(line)
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112 if match:
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113 # gobble up continuation lines
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114 while line[-2:] == '\\\n':
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115 nextline = fp.readline()
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116 if not nextline: break
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117 lineno = lineno + 1
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118 line = line + nextline
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119 name = match.group(1)
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120 body = line[match.end():]
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121 body = pytify(body)
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122 ok = 0
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123 stmt = '%s = %s\n' % (name, body.strip())
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124 try:
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125 exec(stmt, env)
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126 except:
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127 sys.stderr.write('Skipping: %s' % stmt)
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128 else:
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129 outfp.write(stmt)
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130 match = p_macro.match(line)
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131 if match:
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132 macro, arg = match.group(1, 2)
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133 body = line[match.end():]
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134 body = pytify(body)
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135 stmt = 'def %s(%s): return %s\n' % (macro, arg, body)
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136 try:
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137 exec(stmt, env)
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138 except:
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
139 sys.stderr.write('Skipping: %s' % stmt)
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
140 else:
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
141 outfp.write(stmt)
19092
e79fd3934f61 Patch #437683: Use re instead of regex.
Martin v. Löwis <martin@v.loewis.de>
parents: 15930
diff changeset
142 match = p_include.match(line)
e79fd3934f61 Patch #437683: Use re instead of regex.
Martin v. Löwis <martin@v.loewis.de>
parents: 15930
diff changeset
143 if match:
e79fd3934f61 Patch #437683: Use re instead of regex.
Martin v. Löwis <martin@v.loewis.de>
parents: 15930
diff changeset
144 regs = match.regs
15930
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
145 a, b = regs[1]
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
146 filename = line[a:b]
47100
893a4dc17a91 Ran 2to3 over scripts directory.
Georg Brandl <georg@python.org>
parents: 44160
diff changeset
147 if filename in importable:
19093
97de868ad0f4 When representing #includes as imports, do from MOD import *.
Martin v. Löwis <martin@v.loewis.de>
parents: 19092
diff changeset
148 outfp.write('from %s import *\n' % importable[filename])
47100
893a4dc17a91 Ran 2to3 over scripts directory.
Georg Brandl <georg@python.org>
parents: 44160
diff changeset
149 elif filename not in filedict:
15930
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
150 filedict[filename] = None
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
151 inclfp = None
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
152 for dir in searchdirs:
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
153 try:
19092
e79fd3934f61 Patch #437683: Use re instead of regex.
Martin v. Löwis <martin@v.loewis.de>
parents: 15930
diff changeset
154 inclfp = open(dir + '/' + filename)
15930
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
155 break
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
156 except IOError:
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
157 pass
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
158 if inclfp:
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
159 outfp.write(
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
160 '\n# Included from %s\n' % filename)
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
161 process(inclfp, outfp, env)
14a27acc755a Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 9644
diff changeset
162 else:
21248
062c6f47106f Warning message about unfound file was missing trailing \n.
Guido van Rossum <guido@python.org>
parents: 21247
diff changeset
163 sys.stderr.write('Warning - could not find file %s\n' %
062c6f47106f Warning message about unfound file was missing trailing \n.
Guido van Rossum <guido@python.org>
parents: 21247
diff changeset
164 filename)
2169
92cd85470a76 use $INCLUDE path (Mark Hammond)
Guido van Rossum <guido@python.org>
parents: 1928
diff changeset
165
33074
981fff7363b9 [Patch #1005491 ] use __name__ == '__main__' in scripts
Andrew M. Kuchling <amk@amk.ca>
parents: 26368
diff changeset
166 if __name__ == '__main__':
981fff7363b9 [Patch #1005491 ] use __name__ == '__main__' in scripts
Andrew M. Kuchling <amk@amk.ca>
parents: 26368
diff changeset
167 main()