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| data types [message #23542] |
Thu, 01 February 2001 01:04 |
graham_wilson
Messages: 3
Registered: February 2001
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Junior Member |
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I'm trying to compile a short listing of data types for converting
between F77, C, and IDL.
Below is a listing of what I have but note that I have not filled in all
of the IDL column. Any and all comments/help is appreciated and my
appologies to those of you who don't use fixed fonts for reading mail.
F77 type C type IDL type Size
(bytes)
------------------------------------------------------------ -----------
byte x char x byte 1
character x char x byte 1
character*n x char x[n] bytearr(n) n
complex x struct {float r, i;} x ? 8
complex*8 x struct {float r, i;} x ? 8
double complex x struct {float dr, di;} x ? 16
complex*16 x struct {float dr, di;} x ? 16
complex*32 x struct {float dr, di;} x ? 32
double precision x double double 8
real x float x float 4
real*4 x float x float 4
real*8 x double x double 8
real*16 x long double x ? 16
integer x int x long 4
integer*2 x short x fix 2
integer*4 x int x long 4
integer*8 x long long int x ? 8
logical x int x long 4
logical*1 char x byte 1
logical*2 short x fix 2
logical*4 int x long 4
logical*8 long long int x ? 8
NB: I'm assuming that there are no fancy compiling options given to
change the alignment or the default sizes.
Such a list would be useful as an appendix in one of those IDL books we
keep hearing about (better still if it had the byte alignment for
sparc/intel/powerpc/dec/mips...) :p
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