Cleanup and move char functions to the `char_utils.h` header.

7 files changed, 33 insertions, 101 deletions

diff --git a/modules/gdscript/editor/gdscript_highlighter.cpp b/modules/gdscript/editor/gdscript_highlighter.cpp
index 2f571874ae..ac6684a29c 100644
--- a/modules/gdscript/editor/gdscript_highlighter.cpp
+++ b/modules/gdscript/editor/gdscript_highlighter.cpp
@@ -33,18 +33,6 @@
 #include "../gdscript_tokenizer.h"
 #include "editor/editor_settings.h"
 
-static bool _is_char(char32_t c) {
-	return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_';
-}
-
-static bool _is_hex_symbol(char32_t c) {
-	return ((c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'));
-}
-
-static bool _is_bin_symbol(char32_t c) {
-	return (c == '0' || c == '1');
-}
-
 Dictionary GDScriptSyntaxHighlighter::_get_line_syntax_highlighting_impl(int p_line) {
 	Dictionary color_map;
 
@@ -102,7 +90,7 @@ Dictionary GDScriptSyntaxHighlighter::_get_line_syntax_highlighting_impl(int p_l
 		color = font_color;
 		bool is_char = !is_symbol(str[j]);
 		bool is_a_symbol = is_symbol(str[j]);
-		bool is_number = (str[j] >= '0' && str[j] <= '9');
+		bool is_number = is_digit(str[j]);
 
 		/* color regions */
 		if (is_a_symbol || in_region != -1) {
@@ -241,14 +229,14 @@ Dictionary GDScriptSyntaxHighlighter::_get_line_syntax_highlighting_impl(int p_l
 		}
 
 		// allow ABCDEF in hex notation
-		if (is_hex_notation && (_is_hex_symbol(str[j]) || is_number)) {
+		if (is_hex_notation && (is_hex_digit(str[j]) || is_number)) {
 			is_number = true;
 		} else {
 			is_hex_notation = false;
 		}
 
 		// disallow anything not a 0 or 1
-		if (is_bin_notation && (_is_bin_symbol(str[j]))) {
+		if (is_bin_notation && (is_binary_digit(str[j]))) {
 			is_number = true;
 		} else if (is_bin_notation) {
 			is_bin_notation = false;
@@ -270,7 +258,7 @@ Dictionary GDScriptSyntaxHighlighter::_get_line_syntax_highlighting_impl(int p_l
 			}
 		}
 
-		if (!in_word && _is_char(str[j]) && !is_number) {
+		if (!in_word && (is_ascii_char(str[j]) || is_underscore(str[j])) && !is_number) {
 			in_word = true;
 		}
 
diff --git a/modules/gdscript/gdscript_tokenizer.cpp b/modules/gdscript/gdscript_tokenizer.cpp
index 9977b88aa1..d3287ab345 100644
--- a/modules/gdscript/gdscript_tokenizer.cpp
+++ b/modules/gdscript/gdscript_tokenizer.cpp
@@ -312,22 +312,6 @@ GDScriptTokenizer::Token GDScriptTokenizer::pop_error() {
 	return error;
 }
 
-static bool _is_alphanumeric(char32_t c) {
-	return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || c == '_';
-}
-
-static bool _is_digit(char32_t c) {
-	return (c >= '0' && c <= '9');
-}
-
-static bool _is_hex_digit(char32_t c) {
-	return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
-}
-
-static bool _is_binary_digit(char32_t c) {
-	return (c == '0' || c == '1');
-}
-
 GDScriptTokenizer::Token GDScriptTokenizer::make_token(Token::Type p_type) {
 	Token token(p_type);
 	token.start_line = start_line;
@@ -448,10 +432,10 @@ GDScriptTokenizer::Token GDScriptTokenizer::check_vcs_marker(char32_t p_test, To
 }
 
 GDScriptTokenizer::Token GDScriptTokenizer::annotation() {
-	if (!_is_alphanumeric(_peek())) {
+	if (!is_ascii_identifier_char(_peek())) {
 		push_error("Expected annotation identifier after \"@\".");
 	}
-	while (_is_alphanumeric(_peek())) {
+	while (is_ascii_identifier_char(_peek())) {
 		// Consume all identifier characters.
 		_advance();
 	}
@@ -526,7 +510,7 @@ GDScriptTokenizer::Token GDScriptTokenizer::potential_identifier() {
 #define MAX_KEYWORD_LENGTH 10
 
 	// Consume all alphanumeric characters.
-	while (_is_alphanumeric(_peek())) {
+	while (is_ascii_identifier_char(_peek())) {
 		_advance();
 	}
 
@@ -612,7 +596,7 @@ GDScriptTokenizer::Token GDScriptTokenizer::number() {
 	bool has_decimal = false;
 	bool has_exponent = false;
 	bool has_error = false;
-	bool (*digit_check_func)(char32_t) = _is_digit;
+	bool (*digit_check_func)(char32_t) = is_digit;
 
 	if (_peek(-1) == '.') {
 		has_decimal = true;
@@ -620,20 +604,20 @@ GDScriptTokenizer::Token GDScriptTokenizer::number() {
 		if (_peek() == 'x') {
 			// Hexadecimal.
 			base = 16;
-			digit_check_func = _is_hex_digit;
+			digit_check_func = is_hex_digit;
 			_advance();
 		} else if (_peek() == 'b') {
 			// Binary.
 			base = 2;
-			digit_check_func = _is_binary_digit;
+			digit_check_func = is_binary_digit;
 			_advance();
 		}
 	}
 
 	// Allow '_' to be used in a number, for readability.
 	bool previous_was_underscore = false;
-	while (digit_check_func(_peek()) || _peek() == '_') {
-		if (_peek() == '_') {
+	while (digit_check_func(_peek()) || is_underscore(_peek())) {
+		if (is_underscore(_peek())) {
 			if (previous_was_underscore) {
 				Token error = make_error(R"(Only one underscore can be used as a numeric separator.)");
 				error.start_column = column;
@@ -682,7 +666,7 @@ GDScriptTokenizer::Token GDScriptTokenizer::number() {
 			_advance();
 
 			// Consume decimal digits.
-			while (_is_digit(_peek()) || _peek() == '_') {
+			while (is_digit(_peek()) || is_underscore(_peek())) {
 				_advance();
 			}
 		}
@@ -696,7 +680,7 @@ GDScriptTokenizer::Token GDScriptTokenizer::number() {
 				_advance();
 			}
 			// Consume exponent digits.
-			if (!_is_digit(_peek())) {
+			if (!is_digit(_peek())) {
 				Token error = make_error(R"(Expected exponent value after "e".)");
 				error.start_column = column;
 				error.leftmost_column = column;
@@ -705,8 +689,8 @@ GDScriptTokenizer::Token GDScriptTokenizer::number() {
 				push_error(error);
 			}
 			previous_was_underscore = false;
-			while (_is_digit(_peek()) || _peek() == '_') {
-				if (_peek() == '_') {
+			while (is_digit(_peek()) || is_underscore(_peek())) {
+				if (is_underscore(_peek())) {
 					if (previous_was_underscore) {
 						Token error = make_error(R"(Only one underscore can be used as a numeric separator.)");
 						error.start_column = column;
@@ -733,7 +717,7 @@ GDScriptTokenizer::Token GDScriptTokenizer::number() {
 		error.rightmost_column = column + 1;
 		push_error(error);
 		has_error = true;
-	} else if (_is_alphanumeric(_peek())) {
+	} else if (is_ascii_identifier_char(_peek())) {
 		// Letter at the end of the number.
 		push_error("Invalid numeric notation.");
 	}
@@ -865,7 +849,7 @@ GDScriptTokenizer::Token GDScriptTokenizer::string() {
 
 						char32_t digit = _peek();
 						char32_t value = 0;
-						if (digit >= '0' && digit <= '9') {
+						if (is_digit(digit)) {
 							value = digit - '0';
 						} else if (digit >= 'a' && digit <= 'f') {
 							value = digit - 'a';
@@ -1322,9 +1306,9 @@ GDScriptTokenizer::Token GDScriptTokenizer::scan() {
 
 	line_continuation = false;
 
-	if (_is_digit(c)) {
+	if (is_digit(c)) {
 		return number();
-	} else if (_is_alphanumeric(c)) {
+	} else if (is_ascii_identifier_char(c)) {
 		return potential_identifier();
 	}
 
@@ -1392,7 +1376,7 @@ GDScriptTokenizer::Token GDScriptTokenizer::scan() {
 			if (_peek() == '.') {
 				_advance();
 				return make_token(Token::PERIOD_PERIOD);
-			} else if (_is_digit(_peek())) {
+			} else if (is_digit(_peek())) {
 				// Number starting with '.'.
 				return number();
 			} else {
diff --git a/modules/gdscript/language_server/gdscript_extend_parser.cpp b/modules/gdscript/language_server/gdscript_extend_parser.cpp
index 49f5303ae6..17886181d5 100644
--- a/modules/gdscript/language_server/gdscript_extend_parser.cpp
+++ b/modules/gdscript/language_server/gdscript_extend_parser.cpp
@@ -541,7 +541,7 @@ String ExtendGDScriptParser::get_identifier_under_position(const lsp::Position &
 	for (int c = p_position.character; c >= 0; c--) {
 		start_pos = c;
 		char32_t ch = line[c];
-		bool valid_char = (ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || ch == '_';
+		bool valid_char = is_ascii_identifier_char(ch);
 		if (!valid_char) {
 			break;
 		}
@@ -550,7 +550,7 @@ String ExtendGDScriptParser::get_identifier_under_position(const lsp::Position &
 	int end_pos = p_position.character;
 	for (int c = p_position.character; c < line.length(); c++) {
 		char32_t ch = line[c];
-		bool valid_char = (ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || ch == '_';
+		bool valid_char = is_ascii_identifier_char(ch);
 		if (!valid_char) {
 			break;
 		}
diff --git a/modules/mono/editor/bindings_generator.cpp b/modules/mono/editor/bindings_generator.cpp
index 1b4ab0ef4b..1de41821f9 100644
--- a/modules/mono/editor/bindings_generator.cpp
+++ b/modules/mono/editor/bindings_generator.cpp
@@ -690,11 +690,11 @@ void BindingsGenerator::_apply_prefix_to_enum_constants(BindingsGenerator::EnumI
 				continue;
 			}
 
-			if (parts[curr_prefix_length][0] >= '0' && parts[curr_prefix_length][0] <= '9') {
+			if (is_digit(parts[curr_prefix_length][0])) {
 				// The name of enum constants may begin with a numeric digit when strip from the enum prefix,
 				// so we make the prefix for this constant one word shorter in those cases.
 				for (curr_prefix_length = curr_prefix_length - 1; curr_prefix_length > 0; curr_prefix_length--) {
-					if (parts[curr_prefix_length][0] < '0' || parts[curr_prefix_length][0] > '9') {
+					if (!is_digit(parts[curr_prefix_length][0])) {
 						break;
 					}
 				}
diff --git a/modules/text_server_adv/text_server_adv.cpp b/modules/text_server_adv/text_server_adv.cpp
index e50a5337cb..c7511f587e 100644
--- a/modules/text_server_adv/text_server_adv.cpp
+++ b/modules/text_server_adv/text_server_adv.cpp
@@ -303,22 +303,6 @@ _FORCE_INLINE_ bool is_connected_to_prev(char32_t p_chr, char32_t p_pchr) {
 	return (prop != U_JT_RIGHT_JOINING) && (prop != U_JT_NON_JOINING) ? !is_ligature(p_pchr, p_chr) : false;
 }
 
-_FORCE_INLINE_ bool is_control(char32_t p_char) {
-	return (p_char <= 0x001f) || (p_char >= 0x007f && p_char <= 0x009F);
-}
-
-_FORCE_INLINE_ bool is_whitespace(char32_t p_char) {
-	return (p_char == 0x0020) || (p_char == 0x00A0) || (p_char == 0x1680) || (p_char >= 0x2000 && p_char <= 0x200a) || (p_char == 0x202f) || (p_char == 0x205f) || (p_char == 0x3000) || (p_char == 0x2028) || (p_char == 0x2029) || (p_char >= 0x0009 && p_char <= 0x000d) || (p_char == 0x0085);
-}
-
-_FORCE_INLINE_ bool is_linebreak(char32_t p_char) {
-	return (p_char >= 0x000a && p_char <= 0x000d) || (p_char == 0x0085) || (p_char == 0x2028) || (p_char == 0x2029);
-}
-
-_FORCE_INLINE_ bool is_underscore(char32_t p_char) {
-	return (p_char == 0x005F);
-}
-
 /*************************************************************************/
 
 String TextServerAdvanced::interface_name = "ICU / HarfBuzz / Graphite";
diff --git a/modules/text_server_fb/text_server_fb.cpp b/modules/text_server_fb/text_server_fb.cpp
index dd520a2e40..182d2a02ad 100644
--- a/modules/text_server_fb/text_server_fb.cpp
+++ b/modules/text_server_fb/text_server_fb.cpp
@@ -44,30 +44,6 @@
 #endif
 
 /*************************************************************************/
-/*  Character properties.                                                */
-/*************************************************************************/
-
-_FORCE_INLINE_ bool is_control(char32_t p_char) {
-	return (p_char <= 0x001f) || (p_char >= 0x007f && p_char <= 0x009F);
-}
-
-_FORCE_INLINE_ bool is_whitespace(char32_t p_char) {
-	return (p_char == 0x0020) || (p_char == 0x00A0) || (p_char == 0x1680) || (p_char >= 0x2000 && p_char <= 0x200a) || (p_char == 0x202f) || (p_char == 0x205f) || (p_char == 0x3000) || (p_char == 0x2028) || (p_char == 0x2029) || (p_char >= 0x0009 && p_char <= 0x000d) || (p_char == 0x0085);
-}
-
-_FORCE_INLINE_ bool is_linebreak(char32_t p_char) {
-	return (p_char >= 0x000a && p_char <= 0x000d) || (p_char == 0x0085) || (p_char == 0x2028) || (p_char == 0x2029);
-}
-
-_FORCE_INLINE_ bool is_punct(char32_t p_char) {
-	return (p_char >= 0x0020 && p_char <= 0x002F) || (p_char >= 0x003A && p_char <= 0x0040) || (p_char >= 0x005B && p_char <= 0x005E) || (p_char == 0x0060) || (p_char >= 0x007B && p_char <= 0x007E) || (p_char >= 0x2000 && p_char <= 0x206F) || (p_char >= 0x3000 && p_char <= 0x303F);
-}
-
-_FORCE_INLINE_ bool is_underscore(char32_t p_char) {
-	return (p_char == 0x005F);
-}
-
-/*************************************************************************/
 
 String TextServerFallback::interface_name = "Fallback";
 uint32_t TextServerFallback::interface_features = 0; // Nothing is supported.
diff --git a/modules/visual_script/visual_script_expression.cpp b/modules/visual_script/visual_script_expression.cpp
index 17a3566ed2..e8942b9788 100644
--- a/modules/visual_script/visual_script_expression.cpp
+++ b/modules/visual_script/visual_script_expression.cpp
@@ -377,13 +377,13 @@ Error VisualScriptExpression::_get_token(Token &r_token) {
 										r_token.type = TK_ERROR;
 										return ERR_PARSE_ERROR;
 									}
-									if (!((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'))) {
+									if (!is_hex_digit(c)) {
 										_set_error("Malformed hex constant in string");
 										r_token.type = TK_ERROR;
 										return ERR_PARSE_ERROR;
 									}
 									char32_t v;
-									if (c >= '0' && c <= '9') {
+									if (is_digit(c)) {
 										v = c - '0';
 									} else if (c >= 'a' && c <= 'f') {
 										v = c - 'a';
@@ -457,7 +457,7 @@ Error VisualScriptExpression::_get_token(Token &r_token) {
 					break;
 				}
 
-				if (cchar >= '0' && cchar <= '9') {
+				if (is_digit(cchar)) {
 					//a number
 
 					String num;
@@ -476,7 +476,7 @@ Error VisualScriptExpression::_get_token(Token &r_token) {
 					while (true) {
 						switch (reading) {
 							case READING_INT: {
-								if (c >= '0' && c <= '9') {
+								if (is_digit(c)) {
 									//pass
 								} else if (c == '.') {
 									reading = READING_DEC;
@@ -489,7 +489,7 @@ Error VisualScriptExpression::_get_token(Token &r_token) {
 
 							} break;
 							case READING_DEC: {
-								if (c >= '0' && c <= '9') {
+								if (is_digit(c)) {
 								} else if (c == 'e') {
 									reading = READING_EXP;
 
@@ -499,7 +499,7 @@ Error VisualScriptExpression::_get_token(Token &r_token) {
 
 							} break;
 							case READING_EXP: {
-								if (c >= '0' && c <= '9') {
+								if (is_digit(c)) {
 									exp_beg = true;
 
 								} else if ((c == '-' || c == '+') && !exp_sign && !exp_beg) {
@@ -532,11 +532,11 @@ Error VisualScriptExpression::_get_token(Token &r_token) {
 					}
 					return OK;
 
-				} else if ((cchar >= 'A' && cchar <= 'Z') || (cchar >= 'a' && cchar <= 'z') || cchar == '_') {
+				} else if (is_ascii_char(cchar) || cchar == '_') {
 					String id;
 					bool first = true;
 
-					while ((cchar >= 'A' && cchar <= 'Z') || (cchar >= 'a' && cchar <= 'z') || cchar == '_' || (!first && cchar >= '0' && cchar <= '9')) {
+					while (is_ascii_char(cchar) || cchar == '_' || (!first && is_digit(cchar))) {
 						id += String::chr(cchar);
 						cchar = GET_CHAR();
 						first = false;