refactor

Makefile

@@ -13,7 +13,7 @@ MANDIR = $(PREFIX)/share/man/man1
 LDFLAGS = $(shell pkg-config --libs)
 CFLAGS = -O3 -march=native -mtune=native -pipe -g -std=c99 -pedantic -Wall -D_DEFAULT_SOURCE -D_XOPEN_SOURCE=600 $(shell pkg-config --cflags)
 
-SRC = slr.c
+SRC = slr.c lexer.c
 
 $(TARGET): $(SRC)
 	$(CC) $(SRC) -o $@ $(CFLAGS) $(LDFLAGS)

lexer.c

@@ -0,0 +1,65 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "lexer.h"
+
+Token *lexer(char *buf){
+    char *current = strdup(buf);
+    int current_index = 0, tokens_index = 0;
+
+    Token *tokens = malloc(sizeof(Token) * 1024);
+    while(current[current_index] != '\0'){
+        Token *token = NULL;
+        if(current[current_index] == ';'){
+            token = malloc(sizeof(Token));
+            char *value = malloc(2 * sizeof(char));
+            value[0] = current[current_index];
+            value[1] = '\0';
+            token->value = value;
+            token->type = SEPARATOR;
+            tokens[tokens_index] = *token;
+            tokens_index++;
+            printf("FOUND SEMICOLON\n");
+        } else if(current[current_index] == '('){
+            token = malloc(sizeof(Token));
+            char *value = malloc(2 * sizeof(char));
+            value[0] = current[current_index];
+            value[1] = '\0';
+            token->value = value;
+            token->type = SEPARATOR;
+            tokens[tokens_index] = *token;
+            tokens_index++;
+            printf("FOUND OPEN PAREN\n");
+        } else if(current[current_index] == ')'){
+            token = malloc(sizeof(Token));
+            char *value = malloc(2 * sizeof(char));
+            value[0] = current[current_index];
+            value[1] = '\0';
+            token->value = value;
+            token->type = SEPARATOR;
+            tokens[tokens_index] = *token;
+            tokens_index++;
+            printf("FOUND CLOSE PAREN\n");
+        } else if(isdigit(current[current_index])){
+            token = generate_number(current, &current_index); 
+            tokens[tokens_index] = *token;
+            tokens_index++;
+            current_index--;
+        } else if(isalpha(current[current_index])){
+            token = generate_keyword(current, &current_index);
+            tokens[tokens_index] = *token;
+            tokens_index++;
+            current_index--;
+        }
+        if (token != NULL) {
+            print_token(*token);
+        }
+        current_index++;
+    }
+    tokens[tokens_index].type = END_OF_TOKENS;
+    tokens[tokens_index].value = '\0';
+    return tokens;
+}
+

lexer.h

@@ -0,0 +1,8 @@
+#ifndef LEXER_H_
+#define LEXER_H_
+
+#include "slr.h"
+
+Token *lexer(char *buf);
+
+#endif

slr.c

@@ -4,21 +4,25 @@
 #include <string.h>
 
 #include "slr.h"
+#include "lexer.h"
 
-void print_token(Token token){
+void print_token(Token token)
+{
   printf("Token Value: ");
   for (int i = 0; token.value[i] != '\0'; i++) {
     printf("%c", token.value[i]);
   }
   printf("\nToken Type: ");
-  if(token.type == INT){
+  switch (token.type) {
+      case INT:
           printf("int\n");
-  }
-  if(token.type == KEYWORD){
+          break;
+      case KEYWORD:
           printf("Keyword\n");
-  }
-  if(token.type == SEPARATOR){
+          break;
+      case SEPARATOR:
           printf("Separator\n");
+          break;
   }
 }
 
@@ -58,64 +62,6 @@ Token *generate_keyword(char *current, int *current_index)
     return token;
 }
 
-Token *lexer(char *buf){
-    char *current = strdup(buf);
-    int current_index = 0, tokens_index = 0;
-
-    Token *tokens = malloc(sizeof(Token) * 1024);
-    while(current[current_index] != '\0'){
-        Token *token = NULL;
-        if(current[current_index] == ';'){
-            token = malloc(sizeof(Token));
-            char *value = malloc(2 * sizeof(char));
-            value[0] = current[current_index];
-            value[1] = '\0';
-            token->value = value;
-            token->type = SEPARATOR;
-            tokens[tokens_index] = *token;
-            tokens_index++;
-            printf("FOUND SEMICOLON\n");
-        } else if(current[current_index] == '('){
-            token = malloc(sizeof(Token));
-            char *value = malloc(2 * sizeof(char));
-            value[0] = current[current_index];
-            value[1] = '\0';
-            token->value = value;
-            token->type = SEPARATOR;
-            tokens[tokens_index] = *token;
-            tokens_index++;
-            printf("FOUND OPEN PAREN\n");
-        } else if(current[current_index] == ')'){
-            token = malloc(sizeof(Token));
-            char *value = malloc(2 * sizeof(char));
-            value[0] = current[current_index];
-            value[1] = '\0';
-            token->value = value;
-            token->type = SEPARATOR;
-            tokens[tokens_index] = *token;
-            tokens_index++;
-            printf("FOUND CLOSE PAREN\n");
-        } else if(isdigit(current[current_index])){
-            token = generate_number(current, &current_index); 
-            tokens[tokens_index] = *token;
-            tokens_index++;
-            current_index--;
-        } else if(isalpha(current[current_index])){
-            token = generate_keyword(current, &current_index);
-            tokens[tokens_index] = *token;
-            tokens_index++;
-            current_index--;
-        }
-        if (token != NULL) {
-            print_token(*token);
-        }
-        current_index++;
-    }
-    tokens[tokens_index].type = END_OF_TOKENS;
-    tokens[tokens_index].value = '\0';
-    return tokens;
-}
-
 long long get_file_length(FILE *file)
 {
     fseeko(file, 0, SEEK_END);

slr.h

@@ -13,4 +13,8 @@ typedef struct {
   char *value;
 } Token;
 
+void print_token(Token token);
+Token *generate_number(char *current, int *current_index);
+Token *generate_keyword(char *current, int *current_index);
+
 #endif

test.sl

@@ -0,0 +1 @@
+exit(1000);