mirror of
https://github.com/wassname/segpy.git
synced 2026-06-27 20:22:56 +08:00
Robert Smallshire
61 lines
1.3 KiB
Python
61 lines
1.3 KiB
Python
DATA_SAMPLE_FORMAT = {1: 'ibm',
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2: 'l',
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3: 'h',
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5: 'f',
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8: 'b'}
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# A mapping from SEG Y data types to format characters used by the struct module,
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# known a 'ctypes'
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CTYPES = {'l': 'l',
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'long': 'l',
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'int32': 'l',
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'L': 'L',
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'ulong': 'L',
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'uint32': 'L',
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'h': 'h',
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'short': 'h',
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'int16': 'h',
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'H': 'H',
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'ushort': 'H',
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'uint16': 'H',
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'c': 'b',
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'char': 'b',
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'b': 'b',
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'B': 'B',
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'uchar': 'B',
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'f': 'f',
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'float': 'f',
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'ibm': 'ibm'}
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# TODO This is redundant with data in the SH_def below
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CTYPE_DESCRIPTION = {'ibm': 'IBM float',
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'l': '32 bit signed integer',
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'L': '32 bit unsigned integer',
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'h': '16 bit signed integer',
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'H': '16 bit unsigned integer',
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'f': 'IEEE float32',
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'b': '8 bit signed char',
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'B': '8 bit unsigned char'}
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SIZES = dict(l=4,
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L=4,
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h=2,
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H=2,
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b=1,
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B=1,
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f=4,
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ibm=4)
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def size_in_bytes(ctype):
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return SIZES[ctype]
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