build: separate compiler and libs

xtool/safesplit/safesplit.go

@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package safesplit
+
+import "strings"
+
+// SplitPkgConfigFlags splits a pkg-config outputs string into parts.
+// Each part starts with "-" followed by a single character flag.
+// Spaces after the flag character are ignored.
+// Content is read until the next space, unless escaped with "\".
+func SplitPkgConfigFlags(s string) []string {
+	var result []string
+	var current strings.Builder
+	i := 0
+
+	// Skip leading whitespace
+	for i < len(s) && (s[i] == ' ' || s[i] == '\t') {
+		i++
+	}
+
+	for i < len(s) {
+		// Start a new part
+		if current.Len() > 0 {
+			result = append(result, strings.TrimSpace(current.String()))
+			current.Reset()
+		}
+		// Write "-" and the flag character
+		current.WriteByte('-')
+		i++
+		if i < len(s) {
+			current.WriteByte(s[i])
+			i++
+		}
+		// Skip spaces after flag character
+		for i < len(s) && (s[i] == ' ' || s[i] == '\t') {
+			i++
+		}
+		// Read content until next space
+		for i < len(s) {
+			if s[i] == '\\' && i+1 < len(s) && (s[i+1] == ' ' || s[i+1] == '\t') {
+				// Skip backslash and write the escaped space
+				i++
+				current.WriteByte(s[i])
+				i++
+				continue
+			}
+			if s[i] == ' ' || s[i] == '\t' {
+				// Skip consecutive spaces
+				j := i
+				for j < len(s) && (s[j] == ' ' || s[j] == '\t') {
+					j++
+				}
+				// If we've seen content, check for new flag
+				if j < len(s) && s[j] == '-' {
+					i = j
+					break
+				}
+				// Otherwise, include one space and continue
+				current.WriteByte(' ')
+				i = j
+			} else {
+				current.WriteByte(s[i])
+				i++
+			}
+		}
+	}
+	// Add the last part
+	if current.Len() > 0 {
+		result = append(result, strings.TrimSpace(current.String()))
+	}
+	return result
+}