I'm working with HiTech PICC32 on the PIC32MX series of microprocessors, but I think this question is general enough for anyone knowledgable in C. (This is almost equivalent to C90, with sizeof(int) = sizeof(long) = sizeof(float) = 4.)
Let's say I read a 4-byte word of data that represents a float
. I can quickly convert it to its actual float value with:
#define FLOAT_FROM_WORD(WORD_VALUE) (*((float*) &(WORD_VALUE)))
But this only works for lvalues. I can't, for example, use this on a function return value like:
FLOAT_FROM_WORD(eeprom_read_word(addr));
Is there a short and sweet way to do this inline, i.e. without a function call or temp variable? To be honest, there's no HUGE reason for me to avoid a function call or extra var, but it's bugging me. There must be a way I'm missing.
Added: I didn't realise that WORD
was actually a common typedef. I've changed the name of the macro argument to avoid confusion.