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90 lines
2.4 KiB
Python
90 lines
2.4 KiB
Python
"""Creation of PYC resources"""
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import os
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from Carbon import Res
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import __builtin__
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READ = 1
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WRITE = 2
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smAllScripts = -3
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def Pstring(str):
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"""Return a pascal-style string from a python-style string"""
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if len(str) > 255:
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raise ValueError, 'String too large'
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return chr(len(str))+str
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def create(dst, creator='Pyth'):
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"""Create output file. Return handle and first id to use."""
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try:
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os.unlink(dst)
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except os.error:
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pass
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Res.FSpCreateResFile(dst, creator, 'rsrc', smAllScripts)
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return open(dst)
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def open(dst):
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output = Res.FSpOpenResFile(dst, WRITE)
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Res.UseResFile(output)
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return output
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def writemodule(name, id, data, type='PYC ', preload=0, ispackage=0):
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"""Write pyc code to a PYC resource with given name and id."""
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# XXXX Check that it doesn't exist
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# Normally, byte 4-7 are the time stamp, but that is not used
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# for 'PYC ' resources. We abuse byte 4 as a flag to indicate
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# that it is a package rather than an ordinary module.
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# See also macimport.c. (jvr)
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if ispackage:
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data = data[:4] + '\377\0\0\0' + data[8:] # flag resource as package
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else:
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data = data[:4] + '\0\0\0\0' + data[8:] # clear mod date field, used as package flag
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res = Res.Resource(data)
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res.AddResource(type, id, name)
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if preload:
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attrs = res.GetResAttrs()
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attrs = attrs | 0x04
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res.SetResAttrs(attrs)
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res.WriteResource()
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res.ReleaseResource()
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def frompycfile(file, name=None, preload=0, ispackage=0):
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"""Copy one pyc file to the open resource file"""
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if name == None:
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d, name = os.path.split(file)
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name = name[:-4]
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id = findfreeid()
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data = __builtin__.open(file, 'rb').read()
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writemodule(name, id, data, preload=preload, ispackage=ispackage)
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return id, name
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def frompyfile(file, name=None, preload=0, ispackage=0):
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"""Compile python source file to pyc file and add to resource file"""
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import py_compile
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py_compile.compile(file)
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file = file +'c'
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return frompycfile(file, name, preload=preload, ispackage=ispackage)
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# XXXX Note this is incorrect, it only handles one type and one file....
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_firstfreeid = None
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def findfreeid(type='PYC '):
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"""Find next free id-number for given resource type"""
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global _firstfreeid
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if _firstfreeid == None:
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Res.SetResLoad(0)
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highest = 511
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num = Res.Count1Resources(type)
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for i in range(1, num+1):
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r = Res.Get1IndResource(type, i)
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id, d1, d2 = r.GetResInfo()
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highest = max(highest, id)
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Res.SetResLoad(1)
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_firstfreeid = highest+1
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id = _firstfreeid
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_firstfreeid = _firstfreeid+1
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return id
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