c++开源项目freeNOS 学习记录_freesecs的c++开源代码使用-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_37638233/article/details/89440476

本文详细介绍了在项目中用于内存复制、比较和设置的函数实现，包括set、copy和compare函数的具体代码。同时，文章还展示了如何使用宏定义进行不同级别的日志打印，以方便在开发过程中进行调试和错误追踪。

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项目中的set copy compare 函数的实现

void * MemoryBlock::set(void *dest, int ch, unsigned count)
{
    char *temp;

    for(temp = (char *) dest; count != 0; count--)
    {
        *temp++ = ch;
    }
    return (dest);
}

Size MemoryBlock::copy(void *dest, const void *src, Size count)
{
    const char *sp = (const char *)src;
    char *dp = (char *)dest;

    for(Size i = count; i != 0; i--)
        *dp++ = *sp++;

    return (count);
}

Size MemoryBlock::copy(char *dst, char *src, Size count)
{
    char *d = dst;
    const char *s = src;
    unsigned n = count;

    // Copy as many bytes as will fit
    if (n != 0) {
        while (--n != 0) {
            if ((*d++ = *s++) == '\0')
                break;
        }
    }

    // Not enough room in dst, add NUL and traverse rest of src
    if (n == 0) {
        if (count != 0)
            *d = '\0';
        while (*s++)
            ;
    }
    // Count does not include NUL
    return(s - src - 1);
}

bool MemoryBlock::compare(const char *p1, const char *p2, Size count)
{
    for (Size i = count; i > 0 || !count; i--)
    {
        if (!count && (*p1 == ZERO || *p2 == ZERO))
            break;

        if (*p1 != *p2)
            break;

        p1++, p2++;
    }
    return (*p1 == *p2);
}

log打印级别设置

#define MAKE_LOG(type, typestr, msg) \
    {\
     if (Log::instance && type <= Log::instance->getMinimumLogLevel())  \
        (*Log::instance) << "[" typestr "] " << __FILE__ ":" <<  __LINE__ << " " << __FUNCTION__ << " -- " << msg << "\r\n"; \
    }

#define ERROR(msg) MAKE_LOG(Log::Error, “Error”, msg)
#define ERROR(msg) MAKE_LOG(Log::Error, “Error”, msg)
#define ERROR(msg) MAKE_LOG(Log::Error, “Error”, msg)