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/*
* regexp.c: Regular expression list item
*
* See the README file for copyright information and how to reach the author.
*
*/
#include "regexp.h"
// for PCRE without JIT support
#ifndef PCRE_STUDY_JIT_COMPILE
#define PCRE_STUDY_JIT_COMPILE 0
#endif
/* Global instance */
cEpgfixerList<cRegexp, cEvent> EpgfixerRegexps;
const char *strSources[] = { "title","shorttext","description","undefined" };
typedef enum { ATITLE,PTITLE,TITLE,ASHORTTEXT,PSHORTTEXT,SHORTTEXT,ADESCRIPTION,PDESCRIPTION,DESCRIPTION,RATING } backrefs;
const char *strBackrefs[] = { "atitle","ptitle","title","ashorttext","pshorttext","shorttext","adescription","pdescription","description","rating" };
cRegexp::cRegexp()
{
regexp = NULL;
source = REGEXP_UNDEFINED;
re = NULL;
sd = NULL;
}
cRegexp::~cRegexp(void)
{
Free();
free(regexp);
FreeCompiled();
}
void cRegexp::Compile()
{
FreeCompiled();
const char *error;
int erroffset;
re = pcre_compile(regexp, 0, &error, &erroffset, NULL);
if (error) {
error("PCRE compile error: %s at offset %i", error, erroffset);
enabled = false;
}
else {
sd = pcre_study(re, PCRE_STUDY_JIT_COMPILE, (const char **)&error);
if (error)
error("PCRE study error: %s", error);
}
}
void cRegexp::FreeCompiled()
{
if (re) {
pcre_free(re);
re = NULL;
}
if (sd) {
#ifdef PCRE_CONFIG_JIT
pcre_free_study(sd);
#else
pcre_free(sd);
#endif
sd = NULL;
}
}
void cRegexp::SetFromString(char *s, bool Enabled)
{
FREE(regexp);
Free();
FreeCompiled();
enabled = Enabled;
bool compile = true;
if (s[0] == '#') {
enabled = false;
source = REGEXP_UNDEFINED;
string = strdup(s);
return;
}
if (s[0] == '!') {
enabled = compile = false;
string = strdup(s+1);
}
else
string = strdup(s);
char *p = strchr(s, '=');
if (p) {
*p = 0;
regexp = strdup(p + 1);
char *chanfield = (s[0] == '!') ? s+1 : s;
char *field = chanfield;
char *f = strchr(chanfield, ':');
if (f) {
*f = 0;
field = f+1;
numchannels = LoadChannelsFromString(chanfield);
}
if (strcmp(field, "title") == 0)
source = REGEXP_TITLE;
if (strcmp(field, "shorttext") == 0)
source = REGEXP_SHORTTEXT;
if (strcmp(field, "description") == 0)
source = REGEXP_DESCRIPTION;
if (compile)
Compile();
}
}
bool cRegexp::Apply(cEvent *Event)
{
if (enabled && re && IsActive(Event->ChannelID())) {
cString tmpstring;
switch (source) {
case REGEXP_TITLE:
tmpstring = Event->Title();
break;
case REGEXP_SHORTTEXT:
tmpstring = Event->ShortText();
break;
case REGEXP_DESCRIPTION:
tmpstring = Event->Description();
break;
default:
tmpstring = "";
break;
}
if (!*tmpstring)
tmpstring = "";
const char *string;
int ovector[20];
int rc;
rc = pcre_exec(re, sd, *tmpstring, strlen(*tmpstring), 0, 0, ovector, 20);
if (rc > 0) {
int i = 0;
while (i < 10) {
if (pcre_get_named_substring(re, tmpstring, ovector, rc, strBackrefs[i], &string) != PCRE_ERROR_NOSUBSTRING) {
switch (i) {
case TITLE:
Event->SetTitle(string);
break;
case ATITLE:
Event->SetTitle(*cString::sprintf("%s %s", Event->Title(), string));
break;
case PTITLE:
Event->SetTitle(*cString::sprintf("%s %s", string, Event->Title()));
break;
case SHORTTEXT:
Event->SetShortText(string);
break;
case ASHORTTEXT:
Event->SetShortText(*cString::sprintf("%s %s", Event->ShortText(), string));
break;
case PSHORTTEXT:
Event->SetShortText(*cString::sprintf("%s %s", string, Event->ShortText()));
break;
case DESCRIPTION:
Event->SetDescription(string);
break;
case ADESCRIPTION:
Event->SetDescription(*cString::sprintf("%s %s", Event->Description(), string));
break;
case PDESCRIPTION:
Event->SetDescription(*cString::sprintf("%s %s", string, Event->Description()));
break;
case RATING:
Event->SetParentalRating(atoi(string));
break;
default:
break;
}
pcre_free_substring(string);
}
++i;
}
return true;
}
}
return false;
}
void cRegexp::ToggleEnabled(void)
{
if (source != REGEXP_UNDEFINED)
enabled = !enabled;
}
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