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some comments in lib/mod-sys.c for pack and unpack

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hyung-hwan
2021-08-20 04:19:06 +00:00
parent 05f8ef7100
commit 2fe7542657
2 changed files with 32 additions and 10 deletions
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12
hawk/lib/mod-str.c
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@ -275,12 +275,10 @@ static int fnc_isxdigit (hawk_rtx_t* rtx, const hawk_fnc_info_t* fi)
static int fnc_frombcharcode (hawk_rtx_t* rtx, const hawk_fnc_info_t* fi)
{
/* create a string from a series of character codes.
* create a character from a single character code.
* - str::fromcharcode(65) for 'A'
* - str::fromcharcode(65, 66, 67) for "ABC" */
/* TODO: how to support byte string? */
/* create a byte-string from a series of character codes.
* create a byte-character from a single character code.
* - str::frombcharcode(65) for 'A'
* - str::frombcharcode(65, 66, 67) for "ABC" */
hawk_val_t* retv;
hawk_oow_t nargs, i;
@ -333,8 +331,6 @@ static int fnc_fromcharcode (hawk_rtx_t* rtx, const hawk_fnc_info_t* fi)
* - str::fromcharcode(65) for 'A'
* - str::fromcharcode(65, 66, 67) for "ABC" */
/* TODO: how to support byte string? */
hawk_val_t* retv;
hawk_oow_t nargs, i;
hawk_oochu_t* ptr0; /* to guarantee the unsigned code conversion */

30
hawk/lib/mod-sys.c
View File

@ -4874,6 +4874,32 @@ struct st_pointer_t { hawk_uint8_t x; void* y; };
#define AL_POINTER (HAWK_SIZEOF(struct st_pointer_t) - HAWK_SIZEOF(void*))
#endif
/*
Byte-Order
= native
< little-endian
> big-endian
! network (= big-endian)
b qse_int8_t
B qse_uint8_t
h qse_int16_t
H qse_uint16_t
i qse_int32_t
I qse_uint32_t
l qse_int64_t
L qse_uint64_t
q qse_intmax_t
Q qse_uintmax_t
n qse_intptr_t
N qse_uintptr_t
f qse_flt_t (32 bits)
d qse_flt_t (64 bits)
s char[]
p char[]
x pad bytes
*/
static hawk_oow_t pack_uint16_t (hawk_uint8_t* dst, hawk_uint16_t val, int endian)
{
if (endian == ENDIAN_LITTLE)
@ -5067,7 +5093,7 @@ static hawk_int_t pack_data (hawk_rtx_t* rtx, const hawk_oocs_t* fmt, const hawk
break;
}
case 'h':
case 'h': /* 2 bytes signed */
{
hawk_int_t v;
PACK_CHECK_ARG_AND_BUF (rep_cnt, HAWK_SIZEOF(hawk_int16_t) * rep_cnt);
@ -5079,7 +5105,7 @@ static hawk_int_t pack_data (hawk_rtx_t* rtx, const hawk_oocs_t* fmt, const hawk
break;
}
case 'H':
case 'H': /* 2 bytes unsigned */
{
hawk_int_t v;
PACK_CHECK_ARG_AND_BUF (rep_cnt, HAWK_SIZEOF(hawk_uint16_t) * rep_cnt);