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[util] Add message short and long poke functions

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Both big and little endian.
This commit is contained in:
Bill Currie 2021-04-04 15:56:14 +09:00
parent 972b0f8a70
commit f596eacf0c
2 changed files with 61 additions and 0 deletions
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5
include/QF/msg.h
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@ -52,6 +52,11 @@ void MSG_WriteAngle16 (sizebuf_t *sb, float angle);
void MSG_WriteAngle16V (sizebuf_t *sb, const vec3_t angle);
void MSG_WriteUTF8 (sizebuf_t *sb, unsigned utf8);
void MSG_PokeShort (sizebuf_t *sb, unsigned offset, int c);
void MSG_PokeShortBE (sizebuf_t *sb, unsigned offset, int c);
void MSG_PokeLong (sizebuf_t *sb, unsigned offset, int c);
void MSG_PokeLongBE (sizebuf_t *sb, unsigned offset, int c);
typedef struct msg_s {
unsigned readcount;
qboolean badread; // set if a read goes beyond end of message

56
libs/util/msg.c
View file

@ -244,6 +244,62 @@ MSG_WriteUTF8 (sizebuf_t *sb, unsigned utf8)
}
}
VISIBLE void
MSG_PokeShort (sizebuf_t *sb, unsigned offset, int c)
{
if (__builtin_expect (offset + 2 > sb->cursize, 0)) {
Sys_Error ("MSG_PokeShort: invalid offset %d / %d",
offset, sb->cursize);
}
byte *buf = sb->data + offset;
*buf++ = ((unsigned int) c) & 0xff;
*buf = ((unsigned int) c) >> 8;
}
VISIBLE void
MSG_PokeShortBE (sizebuf_t *sb, unsigned offset, int c)
{
if (__builtin_expect (offset + 2 > sb->cursize, 0)) {
Sys_Error ("MSG_PokeShortBE: invalid offset %d / %d",
offset, sb->cursize);
}
byte *buf = sb->data + offset;
*buf++ = ((unsigned int) c) >> 8;
*buf = ((unsigned int) c) & 0xff;
}
VISIBLE void
MSG_PokeLong (sizebuf_t *sb, unsigned offset, int c)
{
if (__builtin_expect (offset + 2 > sb->cursize, 0)) {
Sys_Error ("MSG_PokeLong: invalid offset %d / %d",
offset, sb->cursize);
}
byte *buf = sb->data + offset;
*buf++ = ((unsigned int) c) & 0xff;
*buf++ = (((unsigned int) c) >> 8) & 0xff;
*buf++ = (((unsigned int) c) >> 16) & 0xff;
*buf = ((unsigned int) c) >> 24;
}
VISIBLE void
MSG_PokeLongBE (sizebuf_t *sb, unsigned offset, int c)
{
if (__builtin_expect (offset + 2 > sb->cursize, 0)) {
Sys_Error ("MSG_PokeLongBE: invalid offset %d / %d",
offset, sb->cursize);
}
byte *buf = sb->data + offset;
*buf++ = ((unsigned int) c) >> 24;
*buf++ = (((unsigned int) c) >> 16) & 0xff;
*buf++ = (((unsigned int) c) >> 8) & 0xff;
*buf = ((unsigned int) c) & 0xff;
}
// reading functions ==========================================================
VISIBLE void