mah lexerHEADmaster

1 files changed, 180 insertions, 0 deletions

diff --git a/driver.c b/driver.c
new file mode 100644
index 0000000..ebee4db
--- /dev/null
+++ b/driver.c
@@ -0,0 +1,180 @@
+#include <stdlib.h>
+#include "lex.yy.c"
+#include "token.h"
+
+/* yyline = 1 for numbering lines 1 to n */
+int yyline = 1;
+int yycolumn = 0;
+int yylength = 0;
+int yylval = 0;
+
+/* the string table is one block separated by null terminators
+ * an int array stores the index of each string
+ * access the strings with pointer arithmetic */
+char *stringTable;
+int stringTableIndices[LIMIT2];
+int nStringsStored = 0;
+int nCharsStored = 0;
+
+int main(int argc, char *argv[])
+{
+    int lexReturn;
+    int i;
+    
+    /* initialize string table */
+    stringTable = (char *) malloc(LIMIT1 + 1);
+    strcpy(stringTable,"");
+    
+    printf("Line      Column      Token         Index in String Table\n");
+    
+    /* get tokens and print table */
+    do {
+        
+        lexReturn = yylex();
+        
+        /* printing line and column here so the switch cases are less wordy */
+        if (lexReturn != EOFnum) {
+            printf("%-8d  %-12d", yyline, yycolumn);
+        }
+        
+        switch (lexReturn) {
+            case ANDnum:
+                printf("%-8s\n","ANDnum");
+                break;
+            case ASSGNnum:
+                printf("%-8s\n","ASSGNnum");
+                break;
+            case DECLARATIONSnum:
+                printf("%-8s\n","DECLARATIONSnum");
+                break;
+            case DOTnum:
+                printf("%-8s\n","DOTnum");
+                break;
+            case ENDDECLARATIONSnum:
+                printf("%-8s\n","ENDDECLARATIONSnum");
+                break;
+            case EQUALnum:
+                printf("%-8s\n","EQUALnum");
+                break;
+            case GTnum:
+                printf("%-8s\n","GTnum");
+                break;
+            case IDnum:
+                printf("%-8s      %d\n","IDnum", yylval);
+                break;
+            case INTnum:
+                printf("%-8s\n","INTnum");
+                break;
+            case LBRACnum:
+                printf("%-8s\n","LBRACnum");
+                break;
+            case LPARENnum:
+                printf("%-8s\n","LPARENnum");
+                break;
+            case METHODnum:
+                printf("%-8s\n","METHODnum");
+                break;
+            case NEnum:
+                printf("%-8s\n","NEnum");
+                break;
+            case ORnum:
+                printf("%-8s\n","ORnum");
+                break;
+            case PROGRAMnum:
+                printf("%-8s\n","PROGRAMnum");
+                break;
+            case RBRACnum:
+                printf("%-8s\n","RBRACnum");
+                break;
+            case RPARENnum:
+                printf("%-8s\n","RPARENnum");
+                break;
+            case SEMInum:
+                printf("%-8s\n","SEMInum");
+                break;
+            case VALnum:
+                printf("%-8s\n","VALnum");
+                break;
+            case WHILEnum:
+                printf("%-8s\n","WHILEnum");
+                break;
+            case CLASSnum:
+                printf("%-8s\n","CLASSnum");
+                break;
+            case COMMAnum:
+                printf("%-8s\n","COMMAnum");
+                break;
+            case DIVIDEnum:
+                printf("%-8s\n","DIVIDEnum");
+                break;
+            case ELSEnum:
+                printf("%-8s\n","ELSEnum");
+                break;
+            case EQnum:
+                printf("%-8s\n","EQnum");
+                break;
+            case GEnum:
+                printf("%-8s\n","GEnum");
+                break;
+            case ICONSTnum:
+                printf("%-8s\n","ICONSTnum");
+                break;
+            case IFnum:
+                printf("%-8s\n","IFnum");
+                break;
+            case LBRACEnum:
+                printf("%-8s\n","LBRACEnum");
+                break;
+            case LEnum:
+                printf("%-8s\n","LEnum");
+                break;
+            case LTnum:
+                printf("%-8s\n","LTnum");
+                break;
+            case MINUSnum:
+                printf("%-8s\n","MINUSnum");
+                break;
+            case NOTnum:
+                printf("%-8s\n","NOTnum");
+                break;
+            case PLUSnum:
+                printf("%-8s\n","PLUSnum");
+                break;
+            case RBRACEnum:
+                printf("%-8s\n","RBRACEnum");
+                break;
+            case RETURNnum:
+                printf("%-8s\n","RETURNnum");
+                break;
+            case SCONSTnum:
+                printf("%-8s     %d\n", "SCONSTnum", yylval);
+                break;
+            case TIMESnum:
+                printf("%-8s\n","TIMESnum");
+                break;
+            case VOIDnum:
+                printf("%-8s\n","VOIDnum");
+                break;
+            case EOFnum:
+                printf("%28s\n","EOFnum");
+                break;
+            default:
+                printf("%-8s\n","bad token");
+        }
+
+    } while (lexReturn != 0);
+    
+    /* retrieving string table */
+    printf("\nString Table: ");
+    if (nCharsStored > 0) {
+        for (i=0;i<nStringsStored;i++) {
+            printf("%s ",stringTable + stringTableIndices[i]);
+        }
+    }
+    
+    printf("\n\nEnd of File\n");
+    
+    free(stringTable);
+
+return 0;
+}