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preproc: implement %hs2b() and %b2hs() functions for compact binary data

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Convenience preprocessor functions that allows for efficient packing
of binary data in source code.

Move some functions that has previously been local but are more
generally useful into more accessible places.

Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin 2025-09-15 23:01:59 -07:00
parent 856ac7b7fb
commit f6166e571a
8 changed files with 183 additions and 36 deletions
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6
include/nasmlib.h
View file

@ -292,6 +292,12 @@ int64_t readstrnum(char *str, int length, bool *warn);
int numstr(char *buf, size_t buflen, uint64_t n,
int digits, unsigned int base, bool ucase);
extern const char * const nasmlib_digit_chars[2];
static inline const char *nasm_digit_chars(bool ucase)
{
return nasmlib_digit_chars[ucase];
}
/*
* seg_alloc: allocate a hitherto unused segment number.
*/

11
include/nctype.h
View file

@ -124,4 +124,15 @@ static inline void nasm_ctype_tasm_mode(void)
/* No differences at the present moment */
}
/* Returns a value >= 16 if not a valid hex digit */
static inline unsigned int nasm_hexval(char c)
{
unsigned int v = (unsigned char) c;
if (v >= '0' && v <= '9')
return v - '0';
else
return (v|0x20) - 'a' + 10;
}
#endif /* NASM_NCTYPE_H */