3 ms·

> Extended integer types (introduced in C99) could address this, but I don't know of any compilers that provide them. What environment are you working in? Beca

> Extended integer types (introduced in C99) could address this, but I don't know of any compilers that provide them. What environment are you working in? Because I don't know a single half-recent compiler that does not provide stdint (uint8_t, ..., int64_t), but I mostly work with GCC/LLVM toolchains.

retrac 3y ago
Some embedded compilers will provide stdint. And if the compiler doesn't, I've found that one of the first headers written for a project ends up being an equivalent to stdint. It's pretty common to develop part of an embedded C program under Linux or similar host environment. Better debuggers, better profiling tools, etc. And uint8_t and friends are particularly important when you're working cross-platform.
dzaima 3y ago
Extended integer types aren't necessarily related to stdint.h - in the vast majority if not every one of those "half-decent compilers" the stdint.h types are just typedefs over plain old char/short/int/long/long long, which are not extended integer types. Extended integer types is a mechanism to allow having types other than those.
- myrmidon 3y ago
  > in the vast majority if not every one of those "half-decent compilers" the stdint.h types are just typedefs over plain old char/short/int/long/long long, which are not extended integer types. Sure, but isn't that just an implementation detail? Because I really don't care if my int64_t is internally typedef'd to "long long int" or "__m64", as long as there is a standardized interface to ask for it.
  - dzaima 3y ago
    Point being, _kst_'s comment of "I don't know of any compilers that provide them" is correct - there are few if any compilers that actually have actual extended integer types, and thus introducing such in compilers might be non-trivial, and plenty of code may exist under the assumption that they don't exist and thus could break (things like integer promotion rules, _Generic, varargs; and also intmax_t is of mention as it must be at least as wide as any supported standard or extended integer type (which is also why clang/gcc __int128 doesn't qualify as an integer type as per the standard))

retrac 3y ago

Some embedded compilers will provide stdint. And if the compiler doesn't, I've found that one of the first headers written for a project ends up being an equivalent to stdint. It's pretty common to develop part of an embedded C program under Linux or similar host environment. Better debuggers, better profiling tools, etc. And uint8_t and friends are particularly important when you're working cross-platform.

dzaima 3y ago

Extended integer types aren't necessarily related to stdint.h - in the vast majority if not every one of those "half-decent compilers" the stdint.h types are just typedefs over plain old char/short/int/long/long long, which are not extended integer types. Extended integer types is a mechanism to allow having types other than those.

myrmidon 3y ago
> in the vast majority if not every one of those "half-decent compilers" the stdint.h types are just typedefs over plain old char/short/int/long/long long, which are not extended integer types. Sure, but isn't that just an implementation detail? Because I really don't care if my int64_t is internally typedef'd to "long long int" or "__m64", as long as there is a standardized interface to ask for it.
- dzaima 3y ago
  Point being, _kst_'s comment of "I don't know of any compilers that provide them" is correct - there are few if any compilers that actually have actual extended integer types, and thus introducing such in compilers might be non-trivial, and plenty of code may exist under the assumption that they don't exist and thus could break (things like integer promotion rules, _Generic, varargs; and also intmax_t is of mention as it must be at least as wide as any supported standard or extended integer type (which is also why clang/gcc __int128 doesn't qualify as an integer type as per the standard))