numem.text cleanup

source/numem/text/ascii.d

@@ -30,9 +30,9 @@ bool isHex(char c) {
 }
 
 /**
-    Gets whether the character is alphabetic.
+    Gets whether the character is numeric.
 */
-bool isNumeric(char c) {
+bool isDigit(char c) {
     return (c >= '0' && c <= '9');
 }
 
@@ -46,7 +46,7 @@ bool isAlpha(char c) {
 }
 
 /**
-    Gets whether the character is alphabetic.
+    Gets whether the character is alpha-numeric.
 */
 bool isAlphaNumeric(char c) {
     return 

source/numem/text/encoding.d

@@ -1,3 +1,10 @@
+/*
+    Copyright © 2024, Inochi2D Project
+    Distributed under the 2-Clause BSD License, see LICENSE file.
+
+    Authors: Luna the Foxgirl
+*/
+
 module numem.text.encoding;
 import numem.string;
 import numem.text.ascii;

source/numem/text/uni.d

@@ -0,0 +1,64 @@
+/*
+    Copyright © 2024, Inochi2D Project
+    Distributed under the 2-Clause BSD License, see LICENSE file.
+
+    Authors: Luna the Foxgirl
+*/
+
+/**
+    Numem "Universal" utilities
+*/
+module numem.text.uni;
+import numem.text.ascii;
+
+@nogc nothrow:
+
+/**
+    Gets whether the character is a universal alpha or numeric.
+
+    Standards: 
+        Conforms to ISO/IEC 9899:1999(E) Appendix D of the C99 Standard.
+        Additionally accepts digits.
+*/
+bool isUniAlphaNumeric(char c) {
+    return 
+        (c >= 'a' && c <= 'z') || 
+        (c >= 'A' && c <= 'Z') || 
+        (c >= '0' && c <= '9') || 
+        c == '_';
+}
+
+/**
+    Gets whether the character is a C universal alpha character.
+    
+    Standards: 
+        Conforms to ISO/IEC 9899:1999(E) Appendix D of the C99 Standard.
+*/
+bool isUniAlpha(char c) {
+    return 
+        (c >= 'a' && c <= 'z') || 
+        (c >= 'A' && c <= 'Z') || 
+        c == '_';
+}
+
+/**
+    Gets whether the given string is a universal C identifier.
+
+    Standards: 
+        Conforms to ISO/IEC 9899:1999(E) Appendix D of the C99 Standard.
+*/
+bool isUniIdentifier(inout(char)[] iden) {
+    if (iden.length == 0)
+        return false;
+
+    if (!iden[0].isUniAlpha())
+        return false;
+
+    foreach(i; 1..iden.length) {
+
+        if (!iden[i].isUniAlphaNumeric())
+            return false;
+    }
+
+    return true;
+}