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#include <stddef.h>
#include "lib/regex.h"
#include "lib/regex_impl.h"
#include "src/msg/location.h"
using namespace re2c;
using namespace re2c::libre2c;
int regexec(const regex_t* re, const char* string, size_t nmatch, regmatch_t pmatch[], int eflags) {
const int cflags = re->flags;
if (!(cflags & REG_NFA)) {
// DFA-based algorithms
if (cflags & REG_MULTIPASS) {
// Multi-pass TDFA.
if (cflags & REG_LEFTMOST) {
return regexec_dfa_multipass<ldetctx_t>(re, string, nmatch, pmatch, eflags);
} else {
return regexec_dfa_multipass<pdetctx_t>(re, string, nmatch, pmatch, eflags);
}
} else {
// TDFA with registers and register operations on transitions.
return regexec_dfa(re, string, nmatch, pmatch, eflags);
}
} else {
// NFA-based algorithms
if (cflags & REG_LEFTMOST) {
// Leftmost greedy disambiguation
if (cflags & REG_TRIE) {
return regexec_nfa_leftmost_trie(re, string, nmatch, pmatch, eflags);
} else {
return regexec_nfa_leftmost(re, string, nmatch, pmatch, eflags);
}
} else {
// POSIX disambiguation
if (cflags & REG_TRIE) {
return regexec_nfa_posix_trie(re, string, nmatch, pmatch, eflags);
} else {
return regexec_nfa_posix(re, string, nmatch, pmatch, eflags);
}
}
}
}
subhistory_t* regparse(const regex_t* re, const char* string, size_t nmatch) {
const int cflags = re->flags;
CHECK(cflags & REG_SUBHIST);
if (!(cflags & REG_NFA)) {
// DFA-based algorithms
if (cflags & REG_MULTIPASS) {
// Multi-pass TDFA.
if (cflags & REG_LEFTMOST) {
return regparse_dfa_multipass<ldetctx_t>(re, string, nmatch);
} else {
return regparse_dfa_multipass<pdetctx_t>(re, string, nmatch);
}
} else {
// TDFA with registers and register operations on transitions.
return regparse_dfa(re, string, nmatch);
}
} else {
// NFA-based algorithms (not implemented yet).
UNREACHABLE();
return nullptr;
}
}
const tstring_t* regtstring(const regex_t* re, const char* string) {
const int cflags = re->flags;
CHECK(cflags & REG_TSTRING);
if (!(cflags & REG_NFA)) {
// DFA-based algorithms
if (cflags & REG_MULTIPASS) {
// Multi-pass TDFA.
if (cflags & REG_LEFTMOST) {
return regtstring_dfa_multipass<ldetctx_t>(re, string);
} else {
return regtstring_dfa_multipass<pdetctx_t>(re, string);
}
} else {
// TDFA with registers is not suited to tstring construction.
UNREACHABLE();
return nullptr;
}
} else {
// NFA-based algorithms (not implemented yet).
UNREACHABLE();
return nullptr;
}
}
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