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unpack_container_header.h

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static inline int unpack_container_header(unpack_context* ctx, const char* data, Py_ssize_t len, Py_ssize_t* off)

{

assert(len >= *off);

uint32_t size;

const unsigned char *const p = (unsigned char*)data + *off;

#define inc_offset(inc) \

if (len - *off < inc) \

return 0; \

*off += inc;

switch (*p) {

case var_offset:

inc_offset(3);

size = _msgpack_load16(uint16_t, p + 1);

break;

case var_offset + 1:

inc_offset(5);

size = _msgpack_load32(uint32_t, p + 1);

break;

#ifdef USE_CASE_RANGE

case fixed_offset + 0x0 ... fixed_offset + 0xf:

#else

case fixed_offset + 0x0:

case fixed_offset + 0x1:

case fixed_offset + 0x2:

case fixed_offset + 0x3:

case fixed_offset + 0x4:

case fixed_offset + 0x5:

case fixed_offset + 0x6:

case fixed_offset + 0x7:

case fixed_offset + 0x8:

case fixed_offset + 0x9:

case fixed_offset + 0xa:

case fixed_offset + 0xb:

case fixed_offset + 0xc:

case fixed_offset + 0xd:

case fixed_offset + 0xe:

case fixed_offset + 0xf:

#endif

++*off;

size = ((unsigned int)*p) & 0x0f;

break;

default:

PyErr_SetString(PyExc_ValueError, "Unexpected type header on stream");

return -1;

}

if (unpack_callback_uint32(&ctx->user, size, &ctx->result) < 0)

return -1;

return 1;

}