很想实现类似 php函数里的 ereg 功能.欢迎探讨
/* * 从文件里得到邮件地址 2003-2-8 17:15 */#include <stdlib.h> #include <stdio.h> #define mailMaxLen 20#define bufMaxLen 200
long filesize(FILE *stream) { long curpos, length; curpos = ftell(stream); fseek(stream, 0L, SEEK_END); length = ftell(stream); fseek(stream, curpos, SEEK_SET); return length; }
int main(int argc,char *argv[]){ FILE *fp,*fp_write; int i,temp_len; int bool_find=0,bool_finished=0; long file_len=0; char fileName[30],write_file[30]; char mail_data[50]; //保存得到的临时邮件 char *buf; char *p,*mail_begin,*temp_p; if(argc!=2) { printf("error!/nExp: %s yourmail.dat/n",argv[0]); return 0; } sprintf(write_file, "tmp_%s", argv[1]); //生成要写入的文件名 strcpy(fileName, argv[1]); if((fp=fopen(fileName,"rb"))==NULL) { printf("/nCan't open The file for %s to read! /n",fileName); printf("Press any key to halt!"); return(0); }
if((fp_write=fopen(write_file,"w"))==NULL) { printf("/nCan't open The file for %s to write! /n",fp_write); printf("Press any key to halt!"); return(0); }
file_len=filesize(fp); buf=(char *)malloc(file_len); fread(buf,file_len,1, fp); for(p=buf;*p!='/0';p++) {// if(*p=='_' || *p=='.' || (*p>='0' && *p<='9') || (*p>='a' && *p<='z') || (*p>='A' && *p<='Z') )
if(*p=='@') { bool_finished=0; bool_find=0; mail_begin=p; temp_len=0; while(temp_len<mailMaxLen && p!=buf)//后退,找到邮箱名 { p--;//如果符合标准的 if(*p=='_' || *p=='-' || *p=='.' || (*p>='0' && *p<='9') || (*p>='a' && *p<='z') || (*p>='A' && *p<='Z')) { temp_len++; } else { break; } } p++;//指向正确的开始//eregi("^[_/.0-9a-z-]+@([0-9a-z][0-9a-z-]+/.)+[a-z]{2,3}$",$email)) if(mail_begin!=p) //符合条件了 { temp_p=mail_begin; //这时temp_p 指向@处 mail_begin=p; //记录邮件名开始地址 p=++temp_p; //p指向@后的第一个字符// printf("%s %c","ok",*temp_p);
//接下来的第1个字符应该是a-z 0-9 之间 while((*p>='0' && *p<='9') || (*p>='a' && *p<='z') || (*p>='A' && *p<='Z') && *p!='/0') { p++; //紧接着应该是a-z - if(*p=='-' || (*p>='0' && *p<='9') || (*p>='a' && *p<='z') || (*p>='A' && *p<='Z')) { p++; } else { bool_find=0; break; } temp_len=0; //cd.digital@cfan.com.cn while(temp_len<mailMaxLen && *p!='/0') { if(*p=='-' || (*p>='0' && *p<='9') || (*p>='a' && *p<='z') || (*p>='A' && *p<='Z')) { p++; temp_len++; }// else if(*p=='.')//找到点.了 +[a-z]{2,3}$ { bool_find++;//找到一段了 temp_p=p; //temp_p 指向.所在的位置 p++; break; } else { bool_finished=1; //退出循环 break; } }//while(temp_len<mailMaxLen && *p!='/0') if(bool_finished==1 && bool_find==0)//不符合 break; }//while }// if(mail_begin!=p) //符合条件了// ggg@chinatoolsnet.cnggg _w@163.net if(bool_find>0) { p=temp_p; //p退到最后一个.的位置 p=p+3; if(!((*p>='a' && *p<='z') || (*p>='A' && *p<='Z'))) //最后的 .net 不符合 { p--; }/* for(temp_p=mail_begin;temp_p<=p;temp_p++) { printf("%c",*temp_p); }*/// strncpy(mail_data, mail_begin, 3); fwrite(mail_begin, p-mail_begin+1, 1, fp_write); fputc('/n',fp_write);// printf("%c",'/n'); *p=' '; //这样做是为了下次检查时从此开始 } }// if(*p=='@')// printf("%c",*p); }//for fclose(fp); fclose(fp_write); free(buf); printf("/n--------------------/nok!"); printf("/nfile writed to '%s'!",write_file);
return(0);}
