Added current version utility, int limits and math lib .h

Makefile

@@ -29,6 +29,7 @@ primus-os.bin: $(SRC_DIR)/linker.ld $(OBJ_FILES1) $(OBJ_FILES2) $(OBJ_FILES3)
 	ld $(LDPARAMS) -T $< -o $@ $(OBJ_DIR)/*.o
 
 primus-os.iso: primus-os.bin
+	./update_version
 	mkdir iso
 	mkdir iso/boot
 	mkdir iso/boot/grub

current_version.txt

@@ -0,0 +1 @@
+1.0.27

include/io.h

@@ -4,6 +4,9 @@
 #include "stdint.h"
 #include "tty.h"
 
+#define true 1
+#define false 0
+
 /* The I/O ports */
 #define FB_COMMAND_PORT 0x3d4
 #define FB_DATA_PORT 0x3d5
@@ -30,6 +33,7 @@
 #define check_flag(flags, n) ((flags)&bit(n))
 
 void reboot();
+void shutdown();
 uint8_t input_bytes(uint16_t port);
 void output_bytes(uint16_t port, uint8_t val);
 uint8_t inw(uint16_t port);

include/limits.h

@@ -0,0 +1,7 @@
+#ifndef _LIMITS_H
+#define _LIMITS_H 1
+
+#define INT_MAX 2147483647
+#define INT_MIN -2147483648
+
+#endif

include/math.h

@@ -0,0 +1,19 @@
+#ifndef _MATH_H
+#define _MATH_H 1
+
+#include "stdint.h"
+
+uint32_t factorial(uint32_t n);
+uint32_t pow(uint32_t num, uint32_t n);
+double sqrt(double n);
+double sin(double n);
+double cos(double n);
+double tan(double n);
+double asin(double n);
+double acos(double n);
+double atan(double n);
+double exp(double n);
+double log(double n);
+double log10(double n);
+
+#endif

include/math_shell.h

@@ -0,0 +1,9 @@
+#ifndef _MATH_SHELL_H
+#define _MATH_SHELL_H 1
+
+#include "stdint.h"
+
+uint32_t parse_int(char *string);
+double parse_float(char *string);
+
+#endif

include/string.h

@@ -35,5 +35,6 @@ char *tolower(char *string);
 static char *sitoa(char *buf, unsigned int num, int width, enum flag_itoa flags);
 int vsprintf(char *buf, const char *fmt, va_list va);
 int sprintf(char *buf, const char *fmt, ...);
+uint32_t atoi(const char *str);
 
 #endif

include/version.h

@@ -0,0 +1,8 @@
+#ifndef _VERSION_H
+#define _VERSION_H 1
+
+#define V1 1
+#define V2 0
+#define V3 27
+
+#endif

src/io.c

@@ -1,6 +1,13 @@
 #include "../include/io.h"
 #include "../include/tty.h"
 
+void shutdown()
+{
+    outw(0xB004, 0x2000);
+    outw(0x604, 0x2000);
+    outw(0x4004, 0x3400);
+}
+
 void reboot()
 {
     uint8_t temp;

src/kernel.c

@@ -1,28 +1,36 @@
+#include "../include/version.h"
 #include "../include/tty.h"
 #include "../include/io.h"
 #include "../include/kbd.h"
 #include "../include/string.h"
-#include "../include/time.h"
-#include "../include/date.h"
 #include "../include/datetime.h"
+#include "../include/math.h"
 
 #define BUFFER_SIZE 1024
 
+uint8_t numlock = true;
+uint8_t capslock = false;
+uint8_t scrolllock = false;
+uint8_t shift = false;
+char current_version[7];
+
 int main(void)
 {
 	char buffer[BUFFER_SIZE];
 	int command_size = 0;
 	uint8_t byte;
 
 	terminal_initialize(COLOR_LIGHT_GREY, COLOR_BLACK);
-	printf("Welcome! I'm a super advanced operational system with lots of features.\n\n");
-	printf("Last build - date: %s - time: %s\n", date(), time());
+	sprintf(current_version, "%u.%u.%u", V1, V2, V3 + 1);
+	printf("\nPrimusOS - version %s\n", current_version);
+	printf("Last build - date: %s - time: %s\n", __DATE__, __TIME__);
 	printf("Current datetime: ");
 	datetime();
+	printf("\nWelcome!\n\n");
 
 	strcpy(&buffer[strlen(buffer)], "");
 	print_prompt();
-	while (1)
+	while (true)
 	{
 		while (byte = scan())
 		{
@@ -109,18 +117,22 @@ int main(void)
 					printf("\nA Brazilian developer whose name is Leonardo Araujo. Check out his GitHub:\nhttps://github.com/araujo88");
 					terminal_set_colors(COLOR_LIGHT_GREY, COLOR_BLACK);
 				}
+				else if (strlen(buffer) > 0 && strstr(buffer, "factorial(") != NULL)
+				{
+					char *parser;
+					parser = strstr(buffer, "factorial(");
+					printf("\n%s", parser);
+				}
 				else if (strlen(buffer) > 0 && strcmp(buffer, "clear") == 0)
 				{
 					terminal_initialize(COLOR_LIGHT_GREY, COLOR_BLACK);
 					strcpy(&buffer[strlen(buffer)], "");
 				}
 				else if (strlen(buffer) > 0 && strcmp(buffer, "time") == 0)
 				{
-					printf("\nTime: %s", time());
 				}
 				else if (strlen(buffer) > 0 && strcmp(buffer, "date") == 0)
 				{
-					printf("\nDate: %s", date());
 				}
 				else if (strlen(buffer) > 0 && strcmp(buffer, "datetime") == 0)
 				{
@@ -137,9 +149,7 @@ int main(void)
 				}
 				else if (strlen(buffer) > 0 && strcmp(buffer, "shutdown") == 0)
 				{
-					outw(0xB004, 0x2000);
-					outw(0x604, 0x2000);
-					outw(0x4004, 0x3400);
+					shutdown();
 				}
 				else if (strlen(buffer) == 0)
 				{
@@ -179,4 +189,4 @@ int main(void)
 		command_size = 0;
 	}
 	return 0;
-}
+}

src/math.c

@@ -0,0 +1,17 @@
+#include "../include/math.h"
+
+uint32_t factorial(uint32_t n)
+{
+    if (n == 0)
+    {
+        return 1;
+    }
+    else if (n == 1)
+    {
+        return 1;
+    }
+    else
+    {
+        return n * factorial(n - 1);
+    }
+}

src/math_shell.c

@@ -0,0 +1,13 @@
+#include "../include/math_shell.h"
+#include "../include/string.h"
+
+#include "stdint.h"
+
+uint32_t parse_int(char *string)
+{
+    uint32_t i;
+    char *parser;
+    while (string[i] != '\0')
+    {
+    }
+}

src/string.c

@@ -1,4 +1,8 @@
 #include "../include/string.h"
+#include "../include/limits.h"
+
+#include "stdarg.h"
+#include "stdint.h"
 
 char *ctos(char s[2], const char c)
 {
@@ -278,4 +282,36 @@ int sprintf(char *buf, const char *fmt, ...)
     int ret = vsprintf(buf, fmt, va);
     va_end(va);
     return ret;
+}
+
+uint32_t atoi(const char *str)
+{
+    uint32_t sign = 1, base = 0, i = 0;
+
+    // if whitespaces then ignore.
+    while (str[i] == ' ')
+    {
+        i++;
+    }
+
+    // sign of number
+    if (str[i] == '-' || str[i] == '+')
+    {
+        sign = 1 - 2 * (str[i++] == '-');
+    }
+
+    // checking for valid input
+    while (str[i] >= '0' && str[i] <= '9')
+    {
+        // handling overflow test case
+        if (base > INT_MAX / 10 || (base == INT_MAX / 10 && str[i] - '0' > 7))
+        {
+            if (sign == 1)
+                return INT_MAX;
+            else
+                return INT_MIN;
+        }
+        base = 10 * base + (str[i++] - '0');
+    }
+    return base * sign;
 }

update_version.c

@@ -0,0 +1,62 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main(int argc, char *argv[])
+{
+    FILE *fp;
+    char *line = NULL;
+    size_t len = 0;
+    ssize_t read;
+    const char s[2] = ".";
+    char *token;
+    unsigned int version[3];
+    unsigned short int i = 0;
+    int count = 0;
+
+    fp = fopen("current_version.txt", "r");
+    if (fp == NULL)
+        exit(EXIT_FAILURE);
+    while ((read = getline(&line, &len, fp)) != -1)
+    {
+        /* get the first token */
+        token = strtok(line, s);
+
+        /* walk through other tokens */
+        while (token != NULL)
+        {
+            version[i] = atoi(token);
+            i++;
+            token = strtok(NULL, s);
+        }
+    }
+    fclose(fp);
+    if (line)
+        free(line);
+    line = NULL;
+    len = 0;
+
+    fp = fopen("current_version.txt", "w");
+    if (fp == NULL)
+        exit(EXIT_FAILURE);
+    printf("%d\n", version[2]);
+    version[2] = version[2] + 1;
+    printf("%d\n", version[2]);
+    fprintf(fp, "%u.%u.%u", version[0], version[1], version[2]);
+    fclose(fp);
+
+    i = 0;
+    fp = fopen("include/version.h", "w");
+    if (fp == NULL)
+        exit(EXIT_FAILURE);
+
+    fprintf(fp, "#ifndef _VERSION_H\n");
+    fprintf(fp, "#define _VERSION_H 1\n\n");
+    for (i = 0; i < 3; i++)
+    {
+        fprintf(fp, "#define V%d %u\n", i + 1, version[i]);
+    }
+    fprintf(fp, "\n#endif");
+
+    return 0;
+}