mirror of https://github.com/mrkite/regs.git
42 lines
705 B
C
42 lines
705 B
C
#pragma once
|
|
|
|
/**
|
|
* @copyright 2018 Sean Kasun
|
|
* Routines for reading multi-byte numbers from a stream
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
|
|
static inline uint32_t fourcc(const char *p) {
|
|
return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
|
|
}
|
|
|
|
static inline uint16_t r16(uint8_t *p) {
|
|
uint16_t r = *p++;
|
|
r |= *p << 8;
|
|
return r;
|
|
}
|
|
|
|
static inline uint32_t r24(uint8_t *p) {
|
|
uint32_t r = *p++;
|
|
r |= *p++ << 8;
|
|
r |= *p << 16;
|
|
return r;
|
|
}
|
|
|
|
static inline uint32_t r32(uint8_t *p) {
|
|
uint32_t r = *p++;
|
|
r |= *p++ << 8;
|
|
r |= *p++ << 16;
|
|
r |= *p << 24;
|
|
return r;
|
|
}
|
|
|
|
static inline uint32_t r4(uint8_t *p) {
|
|
uint32_t r = *p++ << 24;
|
|
r |= *p++ << 16;
|
|
r |= *p++ << 8;
|
|
r |= *p;
|
|
return r;
|
|
}
|