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/*
* regexp.c: Regular expression list
*
* See the README file for copyright information and how to reach the author.
*
*/
#include "regexp.h"
#include <unistd.h>
/* Global instance */
cEpgfixerRegexps EpgfixerRegexps;
const char *strSources[] = { "title","shorttext","description","undefined" };
cRegexp::cRegexp()
{
enabled = false;
regexp = NULL;
string = NULL;
source = REGEXP_UNDEFINED;
re = NULL;
sd = NULL;
numchannels = 0;
channels_num = NULL;
channels_str = NULL;
}
cRegexp::~cRegexp(void)
{
Free();
}
void cRegexp::Free(void)
{
free(channels_num);
if (channels_str) {
int i = 0;
while (i < numchannels) {
free(channels_str[i]);
i++;
}
}
free(channels_str);
free(regexp);
free(string);
channels_num = NULL;
channels_str = NULL;
regexp = NULL;
string = NULL;
FreeCompiled();
}
int cRegexp::GetChannelNum(int index)
{
if (channels_num && index >= 0 && index < numchannels)
return channels_num[index];
else
return -1;
}
const char *cRegexp::GetChannelID(int index)
{
if (channels_str && index >= 0 && index < numchannels)
return channels_str[index];
else
return NULL;
}
void cRegexp::ToggleEnabled(void)
{
enabled = enabled ? 0 : 1;
}
void cRegexp::SetFromString(char *s, bool Enabled, bool Precompile)
{
Free();
string = strdup(s);
enabled = Enabled;
bool precompile = Precompile;
if (s[0] == '!' || s[0] == '#') {
enabled = false;
precompile = false;
}
char *p = (s[0] == '#') ? s : strchr(s, '=');
if (p) {
if (p[0] == '#')
source = REGEXP_UNDEFINED;
else {
*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;
char *c = chanfield;
numchannels = 0;
while (c) {
numchannels++;
c = strchr(c+1, ',');
}
if (numchannels > 0) {
c = chanfield;
// Use channel numbers
if (atoi(chanfield))
channels_num = (int *)malloc(sizeof(int)*numchannels);
else// use channel IDs
channels_str = (char **)malloc(sizeof(char *)*numchannels);
int i = 0;
char *pc = strtok(c, ",");
while (i < numchannels) {
// Use channel numbers
if (atoi(chanfield))
channels_num[i] = atoi(pc);
else// use channel IDs
channels_str[i] = strdup(pc);
pc = strtok(NULL, ",");
i++;
}
}
}
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 (precompile)
Compile();
}
}
}
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::Compile()
{
FreeCompiled();
const char *error;
int erroffset;
re = pcre_compile(regexp, 0, &error, &erroffset, NULL);
if (error) {
esyslog("PCRE compile error: %s at offset %i", error, erroffset);
enabled = false;
}
else {
sd = pcre_study(re, 0, (const char **)&error);
if (error)
esyslog("PCRE study error: %s", error);
}
}
cEpgfixerRegexps::cEpgfixerRegexps()
{
fileName = NULL;
regexps = new cRegexpList();
}
cEpgfixerRegexps::~cEpgfixerRegexps()
{
free(fileName);
delete regexps;
}
void cEpgfixerRegexps::SetRegexpConfigFile(const char *FileName)
{
fileName = strdup(FileName);
}
const char *cEpgfixerRegexps::RegexpConfigFile()
{
return fileName;
}
bool cEpgfixerRegexps::ReloadRegexps(bool AllowComments, bool Precompile)
{
regexps->Clear();
return LoadRegexps(fileName, AllowComments, Precompile);
}
bool cEpgfixerRegexps::LoadRegexps(const char *FileName, bool AllowComments, bool Precompile)
{
bool result = false;
if (FileName && access(FileName, F_OK) == 0) {
FILE *f = fopen(FileName, "r");
if (f) {
char *s;
cReadLine ReadLine;
while ((s = ReadLine.Read(f)) != NULL) {
if (!isempty(s)) {
regexps->Add(new cRegexp());
regexps->Last()->SetFromString(s, true, Precompile);
}
}
fclose(f);
}
else {
LOG_ERROR_STR(FileName);
result = false;
}
}
return result;
}
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