Are types like uint32, int32, uint64, int64 defined in any stdlib header?

c libc

The C99 stdint.h defines these:

And, if the architecture supports them:

There are various other integer typedefs in stdint.h as well.

If you're stuck without a C99 environment then you should probably supply your own typedefs and use the C99 ones anyway.

The uint32 and uint64 (i.e. without the _t suffix) are probably application specific.

c libc

Those integer types are all defined in stdint.h

c libc

If you are using C99 just include stdint.h. BTW, the 64bit types are there iff the processor supports them.

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