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diff --git a/‎src/vs/base/common/strings.ts‎
Lines changed: 29 additions & 1 deletion b/‎src/vs/base/common/strings.ts‎
Lines changed: 29 additions & 1 deletion
@@ -338,6 +338,34 @@ export function compareIgnoreCase(a: string, b: string): number {
 	}
 }
 
+/**
+ * [0-9]
+ */
+export function isAsciiDigit(code: number): boolean {
+	return code >= CharCode.Digit0 && code <= CharCode.Digit9;
+}
+
+/**
+ * [a-f]
+ */
+export function isLowerAsciiHex(code: number): boolean {
+	return code >= CharCode.a && code <= CharCode.f;
+}
+
+/**
+ * [A-F]
+ */
+export function isUpperAsciiHex(code: number): boolean {
+	return code >= CharCode.A && code <= CharCode.F;
+}
+
+/**
+ * [0-9a-fA-F]
+ */
+export function isAsciiHex(code: number): boolean {
+	return isAsciiDigit(code) || isLowerAsciiHex(code) || isUpperAsciiHex(code);
+}
+
 export function isLowerAsciiLetter(code: number): boolean {
 	return code >= CharCode.a && code <= CharCode.z;
 }
@@ -346,7 +374,7 @@ export function isUpperAsciiLetter(code: number): boolean {
 	return code >= CharCode.A && code <= CharCode.Z;
 }
 
-function isAsciiLetter(code: number): boolean {
+export function isAsciiLetter(code: number): boolean {
 	return isLowerAsciiLetter(code) || isUpperAsciiLetter(code);
 }