C语言正则表达式库pcre介绍
最强大的C语言正则表达式库pcre
2009-05-24 23:18
PCRE - Perl Compatible Regular Expressions
主页下载:http://www.pcre.org/ 在ubuntu下编译安装: 1: ./configure 2: make 3: make install 此三步即可安装成功,安装成功后的头文件在:/usr/local/include, 库文件在:/usr/local/lib 不多说了,下面是一个例子程序,自己去领悟吧。 #include <stdio.h> #include <string.h> #include <pcre.h> int is_match (char *src, char *pattern) { pcre *re; const char *error; int erroffset; int rc; re = pcre_compile (pattern, /* the pattern */ 0, /* default options */ &error, /* for error message */ &erroffset, /* for error offset */ NULL); /* use default character tables */ /* Compilation failed: print the error message and exit */ if (re == NULL) { printf ("PCRE compilation failed at offset %d: %s\n", erroffset, error); return -1; } rc = pcre_exec (re, /* the compiled pattern */ NULL, /* no extra data - we didn't study the pattern */ src, /* the src string */ strlen (src), /* the length of the src */ 0, /* start at offset 0 in the src */ 0, /* default options */ NULL, 0); /* If Matching failed: */ if (rc < 0) { free (re); return -1; } free (re); return rc; } int main (int argc, char **argv) { const char *pattern = "^good_a.*$"; argv[1] = "good_afmbone..se"; int result = is_match (argv[1], (char *) pattern); printf ("result is: %d\n", result); return 0; } 在ubuntu上编译此程序: gcc -o pcre_demo file_name.c -lpcre 如果编译的时候,提示找不到库文件libpcre.so.0的话,查看一下:/etc/ld.so.conf.d/libc.conf文件,里面是否包含一句:/usr/local/lib,如果没有则添加上吧。 添加上后,使用sudo ldconfig即可,重新编译即可。 运行结果: result is: 0 |