mirror of
https://github.com/wassname/segpy.git
synced 2026-06-29 11:51:29 +08:00
VelizarVESSELINOV
22 lines
512 B
Python
22 lines
512 B
Python
import struct
|
|
|
|
def ibm2ieee2(ibm_float):
|
|
"""
|
|
ibm2ieee2(ibm_float)
|
|
Used by permission
|
|
(C) Secchi Angelo
|
|
with thanks to Howard Lightstone and Anton Vredegoor.
|
|
"""
|
|
dividend = float(16 ** 6)
|
|
|
|
if ibm_float == 0:
|
|
return 0.0
|
|
istic, a, b, c = struct.unpack('>BBBB', ibm_float)
|
|
if istic >= 128:
|
|
sign= -1.0
|
|
istic -= 128
|
|
else:
|
|
sign = 1.0
|
|
mant= float(a << 16) + float(b << 8) + float(c)
|
|
return sign * 16 ** (istic - 64) * (mant / dividend)
|