__FUNCTION__, __LINE__

本文探讨了360网盘群共享开源社区的重要性,分享了如何在VIO设备中设置属性,特别提到了函数vio_set_vo_ch_attr_one的使用,并详细解释了LIB_PRT宏的用途及其参数__FUNCTION__和__LINE__的作用。

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在该函数中会调用LIB_PRT

HI_S32 vio_set_vo_ch_attr_one(VO_DEV VoDev, HI_U32 u32WndNum)
{

         。。。

if (HI_SUCCESS != s32Ret)
{
LIB_PRT("HI_MPI_VO_SetAttrEnd failed!%d\n", s32Ret);
return HI_FAILURE;
}

       。。。

}

LIB_PRT原型如下:

#define LIB_PRT(fmt...)   \

    do {\
        printf("[%s]-%d: ", __FUNCTION__, __LINE__);\
        printf(fmt);\

       }while(0)

这里的两个参数__FUNCTION____LINE__,__FUNCTION__可以显示调用它的函数名,这里是vio_set_vo_ch_attr_one,__LINE__可以定位是哪一行。


### Expand Line Function Usage and Examples The `expand_line` function typically refers to a utility used within text processing or code formatting contexts where lines need expansion based on specific rules. While not universally standardized across all programming languages, implementations often share common characteristics. #### Python Example Implementation A simple implementation of an expand line function might look like this: ```python def expand_line(line, width=80, fill_char=' '): """ Expands the given line by padding it up to specified width using provided character. Args: line (str): The input string to process. width (int): Desired total length after expanding. fill_char (char): Character used for filling spaces. Returns: str: Expanded version of original line. """ if len(line) >= width: return line extra_spaces = width - len(line) expanded_line = line.ljust(width, fill_char) return expanded_line ``` This example demonstrates how one could implement such functionality in Python[^1]. When discussing efficiency and accessibility related to implementing utilities like these, modern advancements have made developing sophisticated yet cost-effective solutions possible. High-performance language models can now achieve impressive results at lower computational costs, making advanced features available even for smaller teams or projects[^2]. --related questions-- 1. How does padding work internally when expanding strings? 2. What are some practical applications of the expand line operation in real-world software development? 3. Can you provide examples of other useful text manipulation functions alongside expand line? 4. In what scenarios would someone prefer using built-in methods over custom-implemented ones like expand line?
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