codecrafters-shell-c

commit f6803f48c44896696c7de3f300ef7631df2aa4b8
parent f9028fa2f85773cbf4dba9b08aab38f9d84f5b6c
Author: 5hif7y <[email protected]>
Date:   Mon, 30 Dec 2024 21:02:56 -0300

7 type and parsing implementation

Diffstat:
M
app/main.c
 | 
62
+++++++++++++++++++++++++++++++++++++++++++++++++++++++-------

1 file changed, 55 insertions(+), 7 deletions(-)
diff --git a/app/main.c b/app/main.c
@@ -1,12 +1,19 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdbool.h>
+#include <stdlib.h>
+
+void parse_input(const char *input, char *cmd, char **args, int *argc);
+
 
 int main() {
 
   // Process user input
   bool running = true;
   char input[100];
+  char cmd[100];
+  char *args[10];
+  int argc;
 
   while(running){
     // Flush after every printf
@@ -23,18 +30,59 @@ int main() {
     if(n > 0 && input[n - 1] == '\n'){
       input[n - 1] = '\0';
     }
+
+    // Parse input
+    parse_input(input, cmd, args, &argc);
+
     // Evaluate commands:
-    if(!strcmp(input, "exit")){
+    if(!strcmp(cmd, "exit")){
       printf("Exiting...\n");
       running = false;
-    } else if(!strcmp(input, "exit 0")){
+    } else if(!strcmp(cmd, "exit 0")){
       //printf("Exiting...\n");
       running = false;
-    } else if(!strncmp(input, "echo", strlen("echo"))){
-      printf("%s\n", input + 5);
-    } else {
-      printf("%s: command not found\n", input);
-    }
+    } else if(!strcmp(cmd, "echo")){
+      for (int i = 0; i < argc; i++){
+        printf("%s ", args[i]);
+      }
+      printf("\n");
+    } else if(!strcmp(cmd, "type")){
+	if(argc > 0){
+          if(!strcmp(args[0], "echo") || !strcmp(args[0], "exit")
+  			|| !strcmp(args[0], "type")){
+            printf("%s is a shell builtin\n", args[0]);
+  	  } else {
+              printf("%s not found\n", args[0]);
+  	  }
+	} else {
+	  printf("Usage: type [command]\n");
+	}
+      } else {
+        printf("%s: command not found\n", input);
+      }
   }
   return 0;
 }
+
+
+void parse_input(const char *input, char *cmd, char **args, int *argc){
+
+  char input_cpy[100];
+  strncpy(input_cpy, input, sizeof(input_cpy) - 1);
+  input_cpy[sizeof(input_cpy) - 1] = '\0';
+
+  char *token = strtok(input_cpy, " ");
+  if(token != NULL){
+	  strcpy(cmd, token);
+  }
+
+  *argc = 0;
+  while((token = strtok(NULL, " ")) != NULL){
+	  args[*argc] = token;
+	  (*argc)++;
+  }
+
+  args[*argc] = NULL;
+}
+
+