They are supposed to be macros, according to the C standards. This ordinarily doesn't matter, but it can be detected by #ifdef, as in the following program:
#include <stdio.h>
#ifdef stdin
int main(void) {
puts("stdin is a macro");
}
#endif
This avoids any possible issue with code possibly expecting __FE_DFL_ENV to be in the data bank when using the large memory model, although I don't think that happened in practice.
Now rewind() will always be called as a function. In combination with an update to the rewind() function in ORCALib, this will ensure that the error indicator is always cleared, as required by the C standards.
This indicates that floating-point exceptions are used to report math errors. The existing functions will still also set errno in the existing cases, but the new C99 functions generally will not.
In the new implementation, variable arguments are not removed until the end of the function. This allows variable argument processing to be restarted, and it prevents the addresses of local variables from changing in the middle of the function. The requirement to turn off stack repair code around varargs functions is also removed.
This fixes#58.
This is required by C95 and later; it may be set by character/string conversion functions. Note that the value of 12 conflicts with GNO's existing definition of EPERM. This should not cause much trouble, but GNO could potentially define its own different value for EILSEQ, with the GNO version of ORCALib adjusted accordingly.
This was not working because floating-point arguments are really passed in the extended format, but based on the wording in the C standard a type of "double" should still work for arguments passed with that type.
This fixes#29. (The bug report was valid only with respect to double, not float or long double.)
This is required by C99 and later, enabled by the availability of __func__.
This requires an updated assertion-printing function in ORCALib. Unfortunately, GNO has the assertion-printing function in its libc rather than in ORCALib, because it calls the GNO implementation of stdio. Therefore, we continue to use the old form under GNO for now, to maintain compatibility with its existing libc.
Previously, they were hard-coded as 60, but the clock tick frequency actually depends on the video mode. They now call a new library function that can detect the video mode and return the proper value.
This also makes CLOCKS_PER_SEC have the type clock_t, as C99 and later require.
The correct values for LDBL_MAX and LDBL_MIN can now be provided, because we support long double constants. The other values are also updated to have more precision, so that they evaluate to bit-correct values in the long double format.
This includes:
*Functions operating on long long in <stdlib.h>
*Limits of long long types in <limits.h>
*64-bit types and limits (plus intmax_t and its limits) in <stdint.h>
*New format codes, plus functions operating on intmax_t, in <inttypes.h>
The new stuff is generally conditionalized to only be included if __ORCAC_HAS_LONG_LONG__ is defined, or if the implementation claims to be C99 or later. This allows the headers to remain usable with older versions of ORCA/C, or with any hypothetical "strict C89" mode that might be implemented in the future.
There still aren't prototypes for the main SANE calls, since they aren't really designed to be called directly from C, and may take variable numbers of parameters depending on the operation.
These had been the values appropriate for double, not accounting for the fact that long double is now the 80-bit extended type.
The integer LDBL_* values have now all been updated to be correct, as has LDBL_EPSILON. LDBL_MAX and LDBL_MIN are still not correct, because ORCA/C internally processes floating-point constants in the double format, and so the correct values would get rounded to INF and 0, respectively.
Note that the SANE 80-bit extended format is almost like the x87 80-bit extended format used for long double on many modern systems, but not entirely. The difference is that SANE allows the biased exponent field of an extended value (either normalized or denormalized) to be 0, yielding an effective exponent of 0-16383 = -16383. x87 uses an effective exponent of -16382 in these cases (which it considers to be pseudo-denormalized or denormalized), yielding values that are twice as large as the SANE values. This difference causes LDBL_MIN_EXP to be different, and would also cause LDBL_MIN to be different if it could be represented correctly.
*Use a typedef rather than a macro definition for va_list. (The C standards specify that va_list is a type, although this would make a practical difference only if someone #undef'd it.)
*Don't include a semicolon in va_start(), so it expands to an expression rather than a statement. This could make a difference in a construct like "if (...) va_start(...); else ...".
