codelength.h File Reference

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Macros
#define	DECODELENGTH(n, p)
#define	DECODELENGTH_READ(n, READ)
#define	DECODELENGTH_CHECKLIMIT(n, p, p_limit)
#define	CODELENGTH(n, p)

Macro Definition Documentation

CODELENGTH

#define CODELENGTH	(		n,
			p )

Value:

if(n>=268435456) *(p++) = (n >> 28) | 0x80; \
if(n>=2097152) *(p++) = (n >> 21) | 0x80; \
if(n>=16384) *(p++) = (n >> 14) | 0x80; \
if(n>=128) *(p++) = (n >> 7) | 0x80; \
*(p++) = n & 0x7f;

DECODELENGTH

#define DECODELENGTH	(		n,
			p )

Value:

n = 0; \
do { n = (n << 7) | (*p & 0x7f); } \
while((*(p++)&0x80) && (n<(1<<25)));

DECODELENGTH_CHECKLIMIT

#define DECODELENGTH_CHECKLIMIT	(		n,
			p,
			p_limit )

Value:

n = 0; \
do { \
    if((p) >= (p_limit)) break; \
    n = (n << 7) | (*(p) & 0x7f); \
} while((*((p)++)&0x80) && (n<(1<<25)));

DECODELENGTH_READ

#define DECODELENGTH_READ	(		n,
			READ )

Value:

n = 0; \
do { \
    unsigned char c; \
    READ(c); \
    n = (n << 7) | (c & 0x07f); \
    if(!(c&0x80)) break; \
} while(n<(1<<25));