wm: teppich

Download patch

ref: 75b1fcc9cf71fa5e72ac5030ac8815c7e6be674e
parent: 4d5b562d78b2ac82526f634ee4800d25d1775065
author: de88 <hamidreza.soleimani88@gmail.com>
date: Sun Nov 26 15:41:19 IST 2023 

add calculator with + and *, need final touches


--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,7 @@
 	cmd/echo.o\
 	cmd/clear.o\
 	cmd/check.o\
+	cmd/cal.o\
 
 L = \
 	libc/strlen.o\
--- /dev/null
+++ b/cmd/cal.c
@@ -1,0 +1,110 @@
+char*
+somegetline(int n)
+{
+  char c;
+  char *line;
+
+  int i = 0;
+  
+  line = malloc(n);
+  memset(line, 0, n);
+  
+  while(i < n)
+  {
+    c = ps2_getc();
+    // you may, or may not require the following
+    vga_putc(c); 
+    
+    if(c == '\r' || c == '\n')
+    {
+      line[i] = '\0';
+      return line;
+        }
+    else if(c != '\b')
+    {
+      line[i] = c;
+      i++;
+    }
+    else
+    {
+      /* we don't want a negative i */
+      if(i)
+        i--;
+      line[i] = 0;
+    }
+  }
+}
+
+int
+chartonum(char input[10]){
+	int i, result = 0;
+
+	for (i = 0; input[i] != '\0'; i++) {
+	    result = result * 10 + (input[i] - '0');
+	}
+	return result;
+}
+
+// char*
+// numtochar(int input){
+// 	char result[10] = "0000000000";
+// 	for (int i = 9; i >= 0 ; i--) {
+// 	    result[i] = input%10;
+// 		input = input/10;
+// 	}
+// 	return *result;
+// }
+
+char*
+numtochar(int input){
+	char *result = malloc(11);
+    // result = "0000000000";
+	for (int i = 9; i >= 0 ; i--) {
+	    result[i] = '0' + (input % 10);
+		input = input/10;
+	}
+    return result;
+}
+
+void
+cal_main(int, char**){
+	char *input;
+	int num1;
+	int num2;
+	// char *oper;
+	// num1 = chartonum(somegetline(16));
+	// num2 = chartonum(somegetline(16));
+	// printf("%d",num1*num2);
+	printf("Welcome To Calculator!\n\n");
+	// printf("Welcome To Calculator!\n\n");
+	while (1)
+	{
+		printf("enter number 1\n");
+		input = somegetline(16);
+		if (!strcmp(input, "quit")) return;
+		num1 = chartonum(input);
+		
+		printf("enter number 2\n");
+		input = somegetline(16);
+		if (!strcmp(input, "quit")) return;
+		num2 = chartonum(input);
+		
+		printf("enter operation\n");
+		input = somegetline(16);
+		if (!strcmp(input, "quit")) return;
+		
+		if(!strcmp(input, "+"))
+		{
+			printf("%d",num1+num2);
+			printf("\n\n");
+		}
+		else if(!strcmp(input, "*"))
+		{
+			printf("%d",num1*num2);
+			printf("\n\n");
+		}
+
+	}
+	
+}
+
--- a/cmd/rc.h
+++ b/cmd/rc.h
@@ -4,6 +4,7 @@
 int echo_main(int, char**);
 int clear_main(int, char**);
 int check_main(int, char**);
+int cal_main(int, char**);
 
 
 static prog_t cmdtbl[] =
@@ -11,4 +12,5 @@
 	{"echo", echo_main},
 	{"clear", clear_main},
 	{"check", check_main},
+	{"cal", cal_main},
 };
-- 
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