From 9fc685a2237b789800b770f3bc1eecb8e1bfdf7b Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Thu, 19 Aug 2021 07:52:26 +0000
Subject: c4: added switch statement

---
 miniany/cc.c | 143 +++++++++++++++++++++++++++++++++++------------------------
 1 file changed, 84 insertions(+), 59 deletions(-)

(limited to 'miniany/cc.c')

diff --git a/miniany/cc.c b/miniany/cc.c
index e5b30c7..ba7ead2 100644
--- a/miniany/cc.c
+++ b/miniany/cc.c
@@ -114,15 +114,17 @@ void scanIdent( int c )
 
 int keyword( char *ident )
 {
-	if( *ident == 'i' ) {
-		if( strcmp( ident, "int" ) == 0 ) {
-			return S_INT;
-		} else {
-			return 0;
-		}
+	switch( ident[0] ) {
+		case 'i':
+			if( strcmp( ident, "int" ) == 0 ) {
+				return S_INT;
+			} else {
+				return 0;
+			}
+			break;
+		default:
+			return  0;
 	}
-	
-	return 0;
 }
 
 int getToken( )
@@ -132,55 +134,76 @@ int getToken( )
 	
 	c = skipWhite( );
 	
-	if( c == EOF ) {
-		t = S_EOI;
-	} else if( c == '+' ) {
-		t = S_PLUS;
-	} else if( c == '-' ) {
-		t = S_MINUS;
-	} else if( c == '*' ) {
-		t = S_STAR;
-	} else if ( c == '/' ) {
-		c = getChar( );
-		if( c == '/' ) {
-			while( c != '\n' ) {
-				c = getChar( );
-			}
-			t = getToken( );
-		} else if( c == '*' ) {
-			do {
-				while( c != '*' ) {
+	switch( c ) {
+		case EOF:
+			t = S_EOI;
+			break;
+		case '+':
+			t = S_PLUS;
+			break;
+		case '-':
+			t = S_MINUS;
+			break;
+		case '*':
+			t = S_STAR;
+			break;
+		case '/':
+			c = getChar( );
+			if( c == '/' ) {
+				while( c != '\n' ) {
 					c = getChar( );
 				}
+				t = getToken( );
+			} else if( c == '*' ) {
+				do {
+					while( c != '*' ) {
+						c = getChar( );
+					}
+					c = getChar( );
+				} while( c != '/' );
 				c = getChar( );
-			} while( c != '/' );
-			c = getChar( );
-			t = getToken( );
-		} else {
-			pushBack( c );
-			t = S_SLASH;
-		}
-	} else if( c == ';' ) {
-		t = S_SEMICOLON;
-	} else if( c == '=' ) {
-		t = S_EQUALS;
-	} else if( isdigit( c ) ) {
-		scanNumber( c );
-		t = S_NUM;
-	} else if( c >= 'a' && c <= 'z' ) {
-		scanIdent( c );
-		if( ( t = keyword( ident ) ) ) {
-		} else {
-			t = S_IDENT;
-		}
-	} else {
-		t = S_ERR;
-		printErrorHeader( );
-		putstring( "unknown token '" );
-		putchar( c );
-		putstring( "'" );
-		putnl( );
-		exit( EXIT_FAILURE );
+				t = getToken( );
+			} else {
+				pushBack( c );
+				t = S_SLASH;
+			}
+			break;
+		case ';':
+			t = S_SEMICOLON;
+			break;
+		case '=':
+			t = S_EQUALS;
+			break;
+		case '0': case '1': case '2': case '3': case '4':
+		case '5': case '6': case '7': case '8': case '9':
+			scanNumber( c );
+			t = S_NUM;
+			break;
+		case 'a': case 'b': case 'c': case 'd': case 'e':
+		case 'f': case 'g': case 'h': case 'i': case 'j':
+		case 'k': case 'l': case 'm': case 'n': case 'o':
+		case 'p': case 'q': case 'r': case 's': case 't':
+		case 'u': case 'v': case 'w': case 'y': case 'z':
+		case 'A': case 'B': case 'C': case 'D': case 'E':
+		case 'F': case 'G': case 'H': case 'I': case 'J':
+		case 'K': case 'L': case 'M': case 'N': case 'O':
+		case 'P': case 'Q': case 'R': case 'S': case 'T':
+		case 'U': case 'V': case 'W': case 'Y': case 'Z':		
+		case '_':
+			scanIdent( c );
+			if( ( t = keyword( ident ) ) ) {
+			} else {
+				t = S_IDENT;
+			}
+			break;
+		default:
+			t = S_ERR;
+			printErrorHeader( );
+			putstring( "unknown token '" );
+			putchar( c );
+			putstring( "'" );
+			putnl( );
+			exit( EXIT_FAILURE );
 	}
 
 	if( DEBUG_SCANNER ) {
@@ -253,11 +276,13 @@ void parseExpression( )
 	}
 }
 
-//~ struct Symbol {
-	//~ char *name;
-//~ };
+/*
+struct Symbol {
+	char *name;
+};
 
-//~ struct Symbol *symbol;
+struct Symbol *symbol;
+*/
 
 void newSymbol( char *s )
 {
@@ -298,7 +323,7 @@ int main( int argc, char **argv )
 	row = 1;
 	pushback = 0;
 	DEBUG_SCANNER = 1;
-	//~ symbol = NULL;
+	/* symbol = NULL; */
 	ident = "12345678901234567890";
 
 	token = getToken( );
-- 
cgit v1.2.3-54-g00ecf