格式化源码，方便自己阅读源代码
该小工具的源码功能是把 行末尾的 { 单独输出为一行， 本人习惯 { 单独为一行。
#include <stdio.h>#include <stdlib.h>#include <string.h>#include <sys/types.h>#include <sys/stat.h>#include <unistd.h>#include <sys/types.h>#include <dirent.h> const char* p_namespace = "namespace";static int read_file (const char* pathfile){FILE *fpnew;FILE *fp;char *ptr, *var;int len, line = 0;char buf[1024]={0};char prefix[1024]={0};struct stat stbuf;stat (pathfile, &stbuf);printf ("read file = %s\n", pathfile);char newfile[255]={0};snprintf (newfile, sizeof(newfile)-1, "%s.fmt", pathfile);if ((fp = fopen (pathfile, "rb"))){fpnew = fopen(newfile, "w");while (fgets (buf, sizeof (buf) - 1, fp)){line++;ptr = buf;while (isblank (*ptr))ptr++;prefix[0]='\0';if ((ptr - buf) > 0){//记录下前面的空格，方便对齐上一行的开头memcpy (prefix, buf, ptr-buf);prefix[ptr-buf]='\0';}len = strlen (ptr);while ( len > 0 && (isblank (*(ptr + len - 1)) || (*(ptr + len - 1) == '\r') || (*(ptr + len - 1) == '\n')) )len--;//if (!*ptr)if (len == 0){fwrite (buf, sizeof(char), strlen(buf), fpnew);//空白行, 只有换行符的情况下continue;}if (*(ptr+len-1) == '{'){if (memcmp (ptr, p_namespace, strlen(p_namespace)) == 0){fwrite (buf, sizeof(char), strlen(buf), fpnew);}else{if (len == 1)// 本行只有空白和 { 的情况{if (prefix[0] == '\0'){fwrite ("{\n", sizeof(char), 2, fpnew);}else{fwrite (prefix, sizeof(char), strlen(prefix), fpnew);fwrite ("{\n", sizeof(char), 2, fpnew);}}else{*(ptr+len-1) = '\0'; //去掉 { 字符fwrite (buf, sizeof(char), strlen(buf), fpnew);if (prefix[0] == '\0'){fwrite ("\n{\n", sizeof(char), 3, fpnew);}else{fwrite ("\n", sizeof(char), 1, fpnew);fwrite (prefix, sizeof(char), strlen(prefix), fpnew);fwrite ("{\n", sizeof(char), 2, fpnew);}}}}else{fwrite (buf, sizeof(char), strlen(buf), fpnew);}}fclose (fp);fclose (fpnew);rename (newfile, pathfile);}return 0;}static void parse_path (const char* path){DIR *dp;struct dirent *dirp;int len;char* p = 0;printf ("parse path = %s\n", path);char filepath[512]={0};struct stat stbuf;if((dp = opendir(path))== NULL) { printf ("can't open scan dir=%s\n", path); return ; } while((dirp = readdir(dp))!=NULL){if (strcmp(dirp->d_name, ".") == 0)continue;if (strcmp(dirp->d_name, "..") == 0)continue;len = strlen(path);if (*(path+len-1) == '/')snprintf (filepath, sizeof(filepath)-1, "%s/%s", path, dirp->d_name);elsesnprintf (filepath, sizeof(filepath)-1, "%s%s", path, dirp->d_name);if (stat(filepath, &stbuf) == 0){if (S_ISDIR(stbuf.st_mode)){parse_path (filepath);}else{const char* suffix = strrchr (dirp->d_name, '.');if (suffix != NULL){if (strcmp(suffix, ".h") == 0 || strcmp(suffix, ".H") == 0 ||strcmp(suffix, ".c") == 0 ||strcmp(suffix, ".C") == 0 ||strcmp(suffix, ".cpp") == 0 ||strcmp(suffix, ".CPP") == 0 ||strcmp(suffix, ".cc") == 0 ||strcmp(suffix, ".CC") == 0 ||strcmp(suffix, ".hpp") == 0 ||strcmp(suffix, ".HPP") == 0){read_file (filepath);}}}}} closedir(dp);}int main (int argc, char** argv){if (argc == 1){printf ("Please set param for scan dir\n");return 0;}char* scandir = argv[1];parse_path (scandir);return 0;}编译命令 ：
gcc -g -O0 -o formatcpp formatcpp.c
./formatcpp 目录名为参数