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是否有像PHP肥料这样的东西可以启动C?
原标题:Is there something like PHP ob_start for C?
  • 时间:2010-03-21 02:40:21
  •  标签:
  • c

我有一个简单的网关听器,通过打印机在屏幕产出上生成一个标识。 我谨记录在案,这样,我就可以在我的桌上插入这个词。

printf("
Packet received!! Decoding...");

我很想知道,这样做是否有任何快速途径。

如果有的话,我能否同时获得两项产出?

增 编

最佳回答

我不知道在C产生缓冲作用的任何职能。 但你可以很容易地模仿:

char buffer[MAX_BUFFER_SIZE] = ""; // that buffers your output.
char temp[SOME_SUITABLE_MAX];

现在每当你使用<条码>印本/代码>,使用<条码>。 如下:

sprintf(temp,"
Packet received!! Decoding...");

并且他们把这种扼杀推到缓冲地带。

strcat(buffer,temp);

keep/代码 接下来是strcat,用于您想要缓冲的每一个信息,一旦进行缓冲,就会产生缓冲输出。

问题回答

假设“记录”意味着你想把它写到档案中,那是,这非常容易。 Unix has a tee used for years, which would Let You do such as:

gateway_listener | tee record_file

如果你在违约时重新使用一个提供<代码>tee<>/code>的系统,那么发现或编纂一个系统非常容易:

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv) {

    FILE *outfile;
    int c;

    if ( argc < 2) {
        fprintf(stderr, "Usage: tee <out_file>
");
        return EXIT_FAILURE;
    }

    if (NULL == (outfile = fopen(argv[1], "w"))) {
        fprintf(stderr, "Unable to open  %s 
", argv[1]);
        return EXIT_FAILURE;
    }

    while (EOF != (c=getchar())) {
        putc(c, outfile);
        putchar(c);
    }

    fclose(outfile);
    return 0;
}




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