From 6b0e32d66ab60f3c0b1ee3a42b77da9a0ed107ee Mon Sep 17 00:00:00 2001
From: Gleb Koval <gleb@koval.net>
Date: Tue, 9 Nov 2021 11:42:53 +0000
Subject: [PATCH] string-to-integer-atoi

---
 string-to-integer-atoi/sol.go | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 string-to-integer-atoi/sol.go

diff --git a/string-to-integer-atoi/sol.go b/string-to-integer-atoi/sol.go
new file mode 100644
index 0000000..58535f7
--- /dev/null
+++ b/string-to-integer-atoi/sol.go
@@ -0,0 +1,29 @@
+package main
+
+var MIN, MAX = -(1 << 31), (1 << 31) - 1
+
+func myAtoi(s string) int {
+	m, n, c := 1, true, 0
+	for _, char := range s {
+		if n && char == ' ' {
+			continue
+		} else if n && char == '-' {
+			m = -1
+		} else if !(n && char == '+') {
+			char_n := int(char - '0')
+			if char_n < 0 || char_n > 9 {
+				break
+			}
+			c *= 10
+			c += char_n
+			if c < 0 || c > MAX {
+				if m == 1 {
+					return MAX
+				}
+				return MIN
+			}
+		}
+		n = false
+	}
+	return c * m
+}