refactor: mv gen into cmd folder

cmd/gen/utils.go

@@ -0,0 +1,95 @@
+package main
+
+import (
+	"bufio"
+	"errors"
+	"strings"
+	"unicode"
+)
+
+func skip2endif(scan *bufio.Scanner, ln int) int {
+	depth := 1
+	for scan.Scan() {
+		ln++
+		t := scan.Text()
+		switch {
+		case strings.HasPrefix(t, "#endif"):
+			depth--
+		case strings.HasPrefix(t, "#if"):
+			depth++
+		default:
+		}
+		if depth <= 0 {
+			break
+		}
+	}
+	return ln
+}
+
+func getInsideRoundBrakets(txt string) (string, int, error) {
+	depth := 0
+	a := 0
+	for i, t := range txt {
+		switch t {
+		case '(':
+			if depth == 0 {
+				a = i + 1
+			}
+			depth++
+		case ')':
+			depth--
+			if depth <= 0 {
+				return txt[a:i], i, nil
+			}
+		}
+	}
+	return "", 0, errors.New("no round brakets pair in " + txt)
+}
+
+func get1sentence(firstln string, scan *bufio.Scanner, ln int) (string, int) {
+	if strings.Contains(firstln, ";") {
+		return firstln, ln
+	}
+	bracedepth := 0
+	sb := strings.Builder{}
+	sb.WriteString(firstln)
+	for scan.Scan() {
+		sb.WriteString("\n")
+		t := scan.Text()
+		ln++
+		if strings.Contains(t, "{") {
+			bracedepth++
+		}
+		if strings.Contains(t, "}") {
+			bracedepth--
+		}
+		sb.WriteString(t)
+		if strings.Contains(t, ";") && bracedepth == 0 {
+			return sb.String(), ln
+		}
+	}
+	return "", -1
+}
+
+func us2camel(t string) string {
+	sb := strings.Builder{}
+	for s := range strings.SplitSeq(t, "_") {
+		rs := []rune(s)
+		sb.WriteRune(unicode.ToUpper(rs[0]))
+		for _, r := range rs[1:] {
+			sb.WriteRune(unicode.ToLower(r))
+		}
+	}
+	return sb.String()
+}
+
+func trimEmptyStringArray(arr []string) []string {
+	news := make([]string, 0, len(arr))
+	for _, s := range arr {
+		if s == "" {
+			continue
+		}
+		news = append(news, s)
+	}
+	return news
+}