Working with single precision floats in binary files

[Siao]

Or to be more specific, the actual converting between single precision float and its hex form...

Unless I'm missing something in the documentation,

for example,

Binary(1.5) = 0x000000000000F83F, while I need 0x0000C03F

and going the opposite way ( 0x0000C03F -> 1.5 ) with current built-in AutoIt commands doesn't seem possible at all (?)

I've written functions to convert Float2Hex and Hex2Float working with strings - converting input to binary base and then converting that to output - following the steps of manual conversion;

but those are rather klutzy, esp. Float2Hex...

Is there a faster way of doing this?

Edited May 29, 2007 by Siao

[Toady]

Or to be more specific, the actual converting between single precision float and its hex form...

Unless I'm missing something in the documentation,

for example,

Binary(1.5) = 0x000000000000F83F, while I need 0x0000C03F

and going the opposite way ( 0x0000C03F -> 1.5 ) with current built-in AutoIt commands doesn't seem possible at all (?)

I've written functions to convert Float2Hex and Hex2Float working with strings - converting input to binary base and then converting that to output - following the steps of manual conversion;

but those are rather klutzy, esp. Float2Hex...

Is there a faster way of doing this?

Can you please supply some code?

[PaulIA]

Or to be more specific, the actual converting between single precision float and its hex form...

Unless I'm missing something in the documentation,

for example,

Binary(1.5) = 0x000000000000F83F, while I need 0x0000C03F

and going the opposite way ( 0x0000C03F -> 1.5 ) with current built-in AutoIt commands doesn't seem possible at all (?)

I've written functions to convert Float2Hex and Hex2Float working with strings - converting input to binary base and then converting that to output - following the steps of manual conversion;

but those are rather klutzy, esp. Float2Hex...

Is there a faster way of doing this?

In the Auto3Lib A3LLibrary module, there are functions called _Lib_FloatToInt and _Lib_IntToFloat that convert a 4 byte float to/from a 4 byte int value. Simply use these and convert the output using the Hex function.

[Siao]

In the Auto3Lib A3LLibrary module, there are functions called _Lib_FloatToInt and _Lib_IntToFloat that convert a 4 byte float to/from a 4 byte int value. Simply use these and convert the output using the Hex function.

Whoa, using DllStruct...

neat and ~100 times faster

Thanks!

[PaulIA]

Whoa, using DllStruct...

neat and ~100 times faster

Thanks!

You're welcome.