From 7e5e7e10823cd61d3787979a9d062266fa3c4859 Mon Sep 17 00:00:00 2001
From: Lanre Adedara <lanre.adedara@shara.co>
Date: Thu, 30 May 2024 08:06:28 +0100
Subject: [PATCH] Swift implementation for LCOF 67

---
 .../README.md"                                | 49 +++++++++++++++++++
 .../Solution.swift"                           | 44 +++++++++++++++++
 2 files changed, 93 insertions(+)
 create mode 100644 "lcof/\351\235\242\350\257\225\351\242\23067. \346\212\212\345\255\227\347\254\246\344\270\262\350\275\254\346\215\242\346\210\220\346\225\264\346\225\260/Solution.swift"

diff --git "a/lcof/\351\235\242\350\257\225\351\242\23067. \346\212\212\345\255\227\347\254\246\344\270\262\350\275\254\346\215\242\346\210\220\346\225\264\346\225\260/README.md" "b/lcof/\351\235\242\350\257\225\351\242\23067. \346\212\212\345\255\227\347\254\246\344\270\262\350\275\254\346\215\242\346\210\220\346\225\264\346\225\260/README.md"
index 4688aa27dc263..ebe212c8fb7b0 100644
--- "a/lcof/\351\235\242\350\257\225\351\242\23067. \346\212\212\345\255\227\347\254\246\344\270\262\350\275\254\346\215\242\346\210\220\346\225\264\346\225\260/README.md"	
+++ "b/lcof/\351\235\242\350\257\225\351\242\23067. \346\212\212\345\255\227\347\254\246\344\270\262\350\275\254\346\215\242\346\210\220\346\225\264\346\225\260/README.md"	
@@ -282,6 +282,55 @@ public class Solution {
 }
 ```
 
+#### Swift
+
+```swift
+class Solution {
+    func strToInt(_ str: String) -> Int {
+        let n = str.count
+        if n == 0 {
+            return 0
+        }
+
+        var index = str.startIndex
+        while index != str.endIndex && str[index] == " " {
+            index = str.index(after: index)
+        }
+
+        if index == str.endIndex {
+            return 0
+        }
+
+        var sign = 1
+        if str[index] == "-" {
+            sign = -1
+            index = str.index(after: index)
+        } else if str[index] == "+" {
+            index = str.index(after: index)
+        }
+
+        var result = 0
+        let flag = Int(Int32.max) / 10
+
+        while index != str.endIndex {
+            let char = str[index]
+            if char < "0" || char > "9" {
+                break
+            }
+
+            if result > flag || (result == flag && char > "7") {
+                return sign == 1 ? Int(Int32.max) : Int(Int32.min)
+            }
+
+            result = result * 10 + Int(char.asciiValue! - Character("0").asciiValue!)
+            index = str.index(after: index)
+        }
+
+        return sign * result
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->
diff --git "a/lcof/\351\235\242\350\257\225\351\242\23067. \346\212\212\345\255\227\347\254\246\344\270\262\350\275\254\346\215\242\346\210\220\346\225\264\346\225\260/Solution.swift" "b/lcof/\351\235\242\350\257\225\351\242\23067. \346\212\212\345\255\227\347\254\246\344\270\262\350\275\254\346\215\242\346\210\220\346\225\264\346\225\260/Solution.swift"
new file mode 100644
index 0000000000000..493a173a309ef
--- /dev/null
+++ "b/lcof/\351\235\242\350\257\225\351\242\23067. \346\212\212\345\255\227\347\254\246\344\270\262\350\275\254\346\215\242\346\210\220\346\225\264\346\225\260/Solution.swift"	
@@ -0,0 +1,44 @@
+class Solution {
+    func strToInt(_ str: String) -> Int {
+        let n = str.count
+        if n == 0 {
+            return 0
+        }
+
+        var index = str.startIndex
+        while index != str.endIndex && str[index] == " " {
+            index = str.index(after: index)
+        }
+
+        if index == str.endIndex {
+            return 0
+        }
+
+        var sign = 1
+        if str[index] == "-" {
+            sign = -1
+            index = str.index(after: index)
+        } else if str[index] == "+" {
+            index = str.index(after: index)
+        }
+
+        var result = 0
+        let flag = Int(Int32.max) / 10
+
+        while index != str.endIndex {
+            let char = str[index]
+            if char < "0" || char > "9" {
+                break
+            }
+
+            if result > flag || (result == flag && char > "7") {
+                return sign == 1 ? Int(Int32.max) : Int(Int32.min)
+            }
+
+            result = result * 10 + Int(char.asciiValue! - Character("0").asciiValue!)
+            index = str.index(after: index)
+        }
+
+        return sign * result
+    }
+}
\ No newline at end of file