kopia lustrzana https://github.com/micropython/micropython
125 wiersze
3.1 KiB
C
125 wiersze
3.1 KiB
C
#include <stdint.h>
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#include <assert.h>
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "obj.h"
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#include "binary.h"
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// Helpers to work with binary-encoded data
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int mp_binary_get_size(char typecode) {
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// This assumes that unsigned and signed types are of the same type,
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// which is invariant for [u]intN_t.
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switch (typecode) {
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case BYTEARRAY_TYPECODE:
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case 'b':
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case 'B':
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return sizeof(int8_t);
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case 'h':
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case 'H':
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return sizeof(int16_t);
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case 'i':
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case 'I':
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return sizeof(int32_t);
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case 'l':
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case 'L':
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return sizeof(int32_t);
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case 'q':
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case 'Q':
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return sizeof(long long);
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#if MICROPY_ENABLE_FLOAT
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case 'f':
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return sizeof(float);
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case 'd':
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return sizeof(double);
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#endif
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}
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return -1;
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}
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mp_obj_t mp_binary_get_val(char typecode, void *p, int index) {
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machine_int_t val = 0;
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switch (typecode) {
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case 'b':
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val = ((int8_t*)p)[index];
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break;
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case BYTEARRAY_TYPECODE:
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case 'B':
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val = ((uint8_t*)p)[index];
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break;
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case 'h':
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val = ((int16_t*)p)[index];
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break;
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case 'H':
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val = ((uint16_t*)p)[index];
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break;
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case 'i':
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case 'l':
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return mp_obj_new_int(((int32_t*)p)[index]);
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case 'I':
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case 'L':
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return mp_obj_new_int_from_uint(((uint32_t*)p)[index]);
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#if MICROPY_LONGINT_IMPL != MICROPY_LONGINT_IMPL_NONE
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case 'q':
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case 'Q':
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// TODO: Explode API more to cover signedness
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return mp_obj_new_int_from_ll(((long long*)p)[index]);
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#endif
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#if MICROPY_ENABLE_FLOAT
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case 'f':
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return mp_obj_new_float(((float*)p)[index]);
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case 'd':
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return mp_obj_new_float(((double*)p)[index]);
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#endif
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}
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return MP_OBJ_NEW_SMALL_INT(val);
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}
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void mp_binary_set_val(char typecode, void *p, int index, mp_obj_t val_in) {
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machine_int_t val = 0;
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if (MP_OBJ_IS_INT(val_in)) {
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val = mp_obj_int_get(val_in);
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}
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switch (typecode) {
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case 'b':
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((int8_t*)p)[index] = val;
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break;
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case BYTEARRAY_TYPECODE:
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case 'B':
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val = ((uint8_t*)p)[index] = val;
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break;
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case 'h':
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val = ((int16_t*)p)[index] = val;
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break;
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case 'H':
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val = ((uint16_t*)p)[index] = val;
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break;
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case 'i':
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case 'l':
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((int32_t*)p)[index] = val;
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break;
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case 'I':
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case 'L':
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((uint32_t*)p)[index] = val;
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break;
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#if MICROPY_LONGINT_IMPL != MICROPY_LONGINT_IMPL_NONE
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case 'q':
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case 'Q':
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assert(0);
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((long long*)p)[index] = val;
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break;
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#endif
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#if MICROPY_ENABLE_FLOAT
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case 'f':
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((float*)p)[index] = mp_obj_float_get(val_in);
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break;
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case 'd':
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((double*)p)[index] = mp_obj_float_get(val_in);
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break;
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#endif
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}
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}
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