C++ (Cpp) JSV_ARRAYBUFFER_IS_FLOAT示例

示例#1

文件： jswrap_arraybuffer.c 项目： ARMinARM/Espruino

/*JSON{
  "type" : "method",
  "class" : "ArrayBufferView",
  "name" : "set",
  "generate" : "jswrap_arraybufferview_set",
  "params" : [
    ["arr","JsVar","Floating point index to access"],
    ["offset","int32","The offset in this array at which to write the values (optional)"]
  ]
}
Copy the contents of `array` into this one, mapping `this[x+offset]=array[x];`
*/
void jswrap_arraybufferview_set(JsVar *parent, JsVar *arr, int offset) {
  if (!(jsvIsString(arr) || jsvIsArray(arr) || jsvIsArrayBuffer(arr))) {
    jsExceptionHere(JSET_ERROR, "Expecting first argument to be an array, not %t", arr);
    return;
  }
  JsvIterator itsrc;
  jsvIteratorNew(&itsrc, arr);
  JsvArrayBufferIterator itdst;
  jsvArrayBufferIteratorNew(&itdst, parent, (size_t)offset);

  bool useInts = !JSV_ARRAYBUFFER_IS_FLOAT(itdst.type) || jsvIsString(arr);

  while (jsvIteratorHasElement(&itsrc) && jsvArrayBufferIteratorHasElement(&itdst)) {
    if (useInts) {
      jsvArrayBufferIteratorSetIntegerValue(&itdst, jsvIteratorGetIntegerValue(&itsrc));
    } else {
      JsVar *value = jsvIteratorGetValue(&itsrc);
      jsvArrayBufferIteratorSetValue(&itdst, value);
      jsvUnLock(value);
    }
    jsvArrayBufferIteratorNext(&itdst);
    jsvIteratorNext(&itsrc);
  }
  jsvArrayBufferIteratorFree(&itdst);
  jsvIteratorFree(&itsrc);
}

示例#2

文件： jsvariterator.c 项目： MaBecker/Espruino

void jsvArrayBufferIteratorSetValue(JsvArrayBufferIterator *it, JsVar *value) {
  if (it->type == ARRAYBUFFERVIEW_UNDEFINED) return;
  assert(!it->hasAccessedElement); // we just haven't implemented this case yet
  char data[8];
  int i,dataLen = (int)JSV_ARRAYBUFFER_GET_SIZE(it->type);

  if (JSV_ARRAYBUFFER_IS_FLOAT(it->type)) {
    jsvArrayBufferIteratorFloatToData(data, (unsigned)dataLen, it->type, jsvGetFloat(value));
  } else {
    jsvArrayBufferIteratorIntToData(data, (unsigned)dataLen, it->type, jsvGetInteger(value));
  }

  if (it->type & ARRAYBUFFERVIEW_BIG_ENDIAN) {
    for (i=dataLen-1;i>=0;i--) {
      jsvStringIteratorSetChar(&it->it, data[i]);
      if (dataLen!=1) jsvStringIteratorNext(&it->it);
    }
  } else {
    for (i=0;i<dataLen;i++) {
      jsvStringIteratorSetChar(&it->it, data[i]);
      if (dataLen!=1) jsvStringIteratorNext(&it->it);
    }
  }
  if (dataLen!=1) it->hasAccessedElement = true;
}

示例#3

文件： jsvariterator.c 项目： ARMinARM/Espruino

void   jsvArrayBufferIteratorSetValue(JsvArrayBufferIterator *it, JsVar *value) {
  if (it->type == ARRAYBUFFERVIEW_UNDEFINED) return;
  assert(!it->hasAccessedElement); // we just haven't implemented this case yet
  char data[8];
  unsigned int i,dataLen = JSV_ARRAYBUFFER_GET_SIZE(it->type);

  if (JSV_ARRAYBUFFER_IS_FLOAT(it->type)) {
    JsVarFloat v = jsvGetFloat(value);       ;
    if (dataLen==4) { float f = (float)v; memcpy(data,&f,dataLen); }
    else if (dataLen==8) { double f = (double)v; memcpy(data,&f,dataLen); }
    else assert(0);
  } else {
    JsVarInt v = jsvGetInteger(value);
    // we don't care about sign when writing - as it gets truncated
    if (dataLen==1) { char c = (char)v; memcpy(data,&c,dataLen); }
    else if (dataLen==2) { short c = (short)v; memcpy(data,&c,dataLen); }
    else if (dataLen==4) { int c = (int)v; memcpy(data,&c,dataLen); }
    else if (dataLen==8) { long long c = (long long)v; memcpy(data,&c,dataLen); }
    else assert(0);
  }

  for (i=0;i<dataLen;i++) {
    jsvStringIteratorSetChar(&it->it, data[i]);
    if (dataLen!=1) jsvStringIteratorNext(&it->it);
  }
  if (dataLen!=1) it->hasAccessedElement = true;
}

示例#4

文件： jsvariterator.c 项目： programmicha/Espruino

JsVarFloat jsvArrayBufferIteratorGetFloatValue(JsvArrayBufferIterator *it) {
  if (it->type == ARRAYBUFFERVIEW_UNDEFINED) return 0;
  char data[8];
  jsvArrayBufferIteratorGetValueData(it, data);
  if (JSV_ARRAYBUFFER_IS_FLOAT(it->type)) {
    return jsvArrayBufferIteratorDataToFloat(it, data);
  } else {
    return (JsVarFloat)jsvArrayBufferIteratorDataToInt(it, data);
  }
}

示例#5

文件： jsvariterator.c 项目： programmicha/Espruino

JsVar *jsvArrayBufferIteratorGetValue(JsvArrayBufferIterator *it) {
  if (it->type == ARRAYBUFFERVIEW_UNDEFINED) return 0;
  char data[8];
  jsvArrayBufferIteratorGetValueData(it, data);
  if (JSV_ARRAYBUFFER_IS_FLOAT(it->type)) {
    return jsvNewFromFloat(jsvArrayBufferIteratorDataToFloat(it, data));
  } else {
    JsVarInt i = jsvArrayBufferIteratorDataToInt(it, data);
    if (it->type == ARRAYBUFFERVIEW_UINT32)
      return jsvNewFromLongInteger((long long)(uint32_t)i);
    return jsvNewFromInteger(i);
  }
}

示例#6

文件： jsvariterator.c 项目： programmicha/Espruino

void jsvArrayBufferIteratorSetIntegerValue(JsvArrayBufferIterator *it, JsVarInt v) {
  if (it->type == ARRAYBUFFERVIEW_UNDEFINED) return;
  assert(!it->hasAccessedElement); // we just haven't implemented this case yet
  char data[8];
  unsigned int i,dataLen = JSV_ARRAYBUFFER_GET_SIZE(it->type);

  if (JSV_ARRAYBUFFER_IS_FLOAT(it->type)) {
    jsvArrayBufferIteratorFloatToData(data, dataLen, it->type, (JsVarFloat)v);
  } else {
    jsvArrayBufferIteratorIntToData(data, dataLen, it->type, v);
  }

  for (i=0;i<dataLen;i++) {
    jsvStringIteratorSetChar(&it->it, data[i]);
    if (dataLen!=1) jsvStringIteratorNext(&it->it);
  }
  if (dataLen!=1) it->hasAccessedElement = true;
}