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POhow to write a appropriate pattern in pcre with C
 

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  1. POhow to write a appropriate pattern in pcre with C
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    <p>Now I have a string which has many substring like "href="http://www.AAA.com"" and other characters, Here my question,In my C code I write :</p> <p>char pattern[] = "/^href.*>$/g";</p> <p>and I want to pick up all the urls in the long string. But it doesn's work.Can SomeBody help me? Your help will be appreciated. Here is the Code:</p> <pre><code>#define PCRE_STATIC // #include &lt;stdio.h&gt; #include &lt;string.h&gt; #include &lt;pcre.h&gt; #define OVECCOUNT 30 /* should be a multiple of 3 */ #define EBUFLEN 128 #define BUFLEN 1024 int main() { pcre *re; const char *error; int erroffset; int ovector[OVECCOUNT]; int rc, i; char src[] = "&lt;a href=\"http://union.elong.com/r/hotel/2000000000855850825\" target=\"_blank\"&gt;ss&lt;/a&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;&lt;a href=\"http://123.sogou.com/sub/fanyi.html\" targedd&lt;/a&gt;&lt;/td&gt;&lt;td&gt;&lt;a href=\"http://123.sogou.com/sub/fantizi.html\" target=\"_blank\"&gt;繁 体 字&lt;/a&gt;&lt;/td&gt;&lt;td&gt;&lt;a href=\"http://123.sogou.com/sub/kuaidi.htm&gt;快递查询&lt;/a&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;&lt;a href=\"http://q.stock.sohu.com/index.shtm&gt;股票行情&lt;/a&gt;&lt;/td&gt;&lt;td&gt;&lt;a href=\"http://www.chinamobile.com/service/billservice/&gt;话费查询&lt;/a&gt;&lt;/td&gt;&lt;td&gt;&lt;a href=\"http://auto.sohu.com/s2004/weizhangchaxun.shtml&gt;交通违章&lt;/a&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;"; char pattern[] = "/^href.*&gt;$/g"; re = pcre_compile(pattern, 0, &amp;error, &amp;erroffset, NULL); if (re == NULL) { printf("PCRE compilation failed at offset %d: %s\n", erroffset, error); return 1; } rc = pcre_exec(re, NULL, src, strlen(src), 0, PCRE_MULTILINE, ovector, OVECCOUNT); if (rc &lt; 0) { if (rc == PCRE_ERROR_NOMATCH) printf("Sorry, no match ...\n"); else printf("Matching error %d\n", rc); pcre_free(re); return 1; } printf("\nOK, %d has matched ...\n\n",rc); for (i = 0; i &lt; rc; i++) { char *substring_start = src + ovector[2*i]; int substring_length = ovector[2*i+1] - ovector[2*i]; printf("$%2d: %.*s\n", i, substring_length, substring_start); } pcre_free(re); return 0; } </code></pre>
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    2. COI have tried char pattern[] ="href.*>"; It can only give me a result which is the whole string.I want pick up all the urls.
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