C语言 对不定长度字符串（数组）的赋值（空间拷贝不用遍历，全网最简洁易懂）

void FlushBuf(char** tmp, char* value, int len)
{
  FlushBufMemory(tmp, len + 1);
  
  strcpy(*tmp, value);
}

void FlushBufMemory(char** tmp, int len) {
  free(*tmp);
  *tmp = (char*)malloc(len);
  memset(*tmp, 0, len);
}

Demo:

  //提取值
  int valueLen = posSepa - 2;
  char thisValue[valueLen + 1] = {0};

  memset(thisValue, 0, valueLen + 1);
  strncpy(thisValue, buf + 2, valueLen);
  thisValue[valueLen] = '\0';

  FlushBuf(&serDict.dicKey, thisKey, keyLen);