Пример #1
0
// Compile pattern with jit compilation. flagC is Compile flags,
// flagS is study flag.
func CompileJIT(pattern string, flagsC, flagsS int) (Regexp, error) {
	patternC := C.CString(pattern)
	defer C.free(unsafe.Pointer(patternC))
	if clen := int(C.strlen(patternC)); clen != len(pattern) {
		return Regexp{}, fmt.Errorf("%s (%d): %s",
			pattern,
			clen,
			"NUL byte in pattern",
		)
	}
	var errptr *C.char
	var erroffset C.int
	ptr := C.pcre_compile(patternC, C.int(flagsC), &errptr, &erroffset, nil)
	if ptr == nil {
		return Regexp{}, fmt.Errorf("%s (%d): %s",
			pattern,
			int(erroffset),
			C.GoString(errptr),
		)
	}
	psize := pcresize(ptr)
	var re Regexp
	re.ptr = make([]byte, psize)
	C.memcpy(unsafe.Pointer(&re.ptr[0]), unsafe.Pointer(ptr), psize)
	errS := re.study(flagsS)
	if errS != nil {
		return re, fmt.Errorf("study error: %s", errS)
	}
	return re, nil
}
Пример #2
0
// Try to compile the pattern.  If an error occurs, the second return
// value is non-nil.
func Compile(pattern string, flags int) (Regexp, *CompileError) {
	pattern1 := C.CString(pattern)
	defer C.free(unsafe.Pointer(pattern1))
	if clen := int(C.strlen(pattern1)); clen != len(pattern) {
		return Regexp{}, &CompileError{
			Pattern: pattern,
			Message: "NUL byte in pattern",
			Offset:  clen,
		}
	}
	var errptr *C.char
	var erroffset C.int
	ptr := C.pcre_compile(pattern1, C.int(flags), &errptr, &erroffset, nil)
	if ptr == nil {
		return Regexp{}, &CompileError{
			Pattern: pattern,
			Message: C.GoString(errptr),
			Offset:  int(erroffset),
		}
	}
	return toheap(ptr), nil
}