Regulære udtryk og finde mønster i strenge
HejsaJeg sidder og med noget pcre, der kan finde og hente mønstre i en streng. Helt præcis er det:
streng = "<html>hlhtmlfsdfd<html>htmlgkjdfhgkjhdf<head><body></body></html>"
og her har jeg forsøgt med "(<|</)html>", uden dog at få meget andet end:
0 <html>
1 <
Den kode jeg bruger er
const char *error;
const char *res;
int erroffset;
pcre *re;
int rc;
int oVecNeed;
int* ovector;
int resLength;
re = pcre_compile (
pattern.c_str(), /* the pattern *///
0, /* default options */
&error, /* for error message */
&erroffset, /* for error offset */
0);
if (!re)
{
string tmp(error);
errorMsg = "Internal error: pcre_compile failed with the error: " + tmp;
errorMsg += " at " + intToStr(erroffset) + ":\n";
errorMsg += pattern;
return false;
}
if(pcre_fullinfo(re, NULL, PCRE_INFO_CAPTURECOUNT, &oVecNeed) != 0)
{
errorMsg = "Regular expression did not match any substring";
return false;
}
ovector = new int[3*(oVecNeed+1)];
rc = pcre_exec (
re, /* the compiled pattern */
0, /* no extra data - pattern was not studied */
str.c_str(), /* the string to match */
(int) str.length(), /* the length of the string */
0, /* start at offset 0 in the subject */
0, /* default options */
ovector, /* output vector for substring information */
3*(oVecNeed+1)); /* number of elements in the output vector */
if (rc < 0)
{
int errVal = 0;
switch (rc)
{
case PCRE_ERROR_NOMATCH:
errorMsg = "Regular expression did not match any substring";
break;
default:
errorMsg = "Internal error: pcre_exec failed";
break;
}
delete ovector;
return false;
}
for (int i = 0; i < rc; i++) {
printf("%2d: %.*s\n", i, ovector[2*i+1] - ovector[2*i], str.c_str() + ovector[2*i]);
}
Er jeg helt ude i hamppen, eller kan nogen se hvorfor det ikke virker???
