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watcom.h: horrific hack to support OpenWatcom switch limitations

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OpenWatcom still doesn't have proper support for 64-bit switch
statements.  Hack around it in a truly vile way.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin 2017-02-20 00:36:53 -08:00
parent 2902fbc1d8
commit 9b4b92b014
2 changed files with 18 additions and 0 deletions
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1
config/watcom.h
View File

@ -69,5 +69,6 @@
#define HAVE_UNISTD_H 1
#define HAVE_VSNPRINTF 1
#define STDC_HEADERS 1
#define inline __inline
#endif /* NASM_CONFIG_WATCOM_H */

17
include/compiler.h
View File

@ -81,6 +81,7 @@
#include <stddef.h>
#include <stdarg.h>
#include <stdio.h>
#include <limits.h>
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
@ -248,4 +249,20 @@ char *strsep(char **, const char *);
# define pure_func
#endif
/* Watcom doesn't handle switch statements with 64-bit types, hack around it */
#ifdef __WATCOM__
# define BOGUS_CASE 0x76543210
static inline unsigned int watcom_switch_hack(uint64_t x)
{
if (x > UINT_MAX)
return BOGUS_CASE;
else
return (unsigned int)x;
}
# define switch(x) switch(watcom_switch_hack(x))
# define default case BOGUS_CASE: default
#endif
#endif /* NASM_COMPILER_H */