我正在尝试使用XCode编译别人的Windows代码。
有这样一个问题:
inline GMVariable(const char* a) {
unsigned int len = strlen(a);
char *data = (char*)(malloc(len+13));
if(data==NULL) {
}
// Apparently the first two bytes are the code page (0xfde9 = UTF8)
// and the next two bytes are the number of bytes per character (1).
// But it also works if you just set it to 0, apparently.
// This is little-endian, so the two first bytes actually go last.
*(unsigned int*)(data) = 0x0001fde9;
// This is the reference count. I just set it to a high value
// so GM doesn't try to free the memory.
*(unsigned int*)(data+4) = 1000;
// Finally, the length of the string.
*(unsigned int*)(data+8) = len;
memcpy(data+12, a, len+1);
type = 1;
real = 0.0;
string = data+12;
padding = 0;
}
这是一个头文件。
它会提示:
使用了未声明的标识符 'malloc'
还有strlen,memcpy和free。
发生了什么?如果这很简单,请原谅,我是C和C++的新手。