Espresso/user/test.c

#include "../libc/include/stdio.h"
#include "../libc/include/string.h"

/*extern void writestring(const char* __s);
extern char* getstring(void);*/

void print_uint(uint32_t value)
{
	char buffer[11];
	int i = 0;

	do
	{
		buffer[i++] = '0' + (value % 10);
		value /= 10;
	} while (value > 0);

	while (i--)
	{
		writechar(buffer[i]);
	}
}

int main(void)
{
	while (1)
	{
		writestring("command: ");
		
		char istr[128];
		memset(istr, 0, sizeof(istr));

		int rv = getstring(istr);

		if (!istr)
		{
			writestring("\nERROR: getstring returned NULL\n");
			break;
		}

		if (rv < 0)
		{
			writestring("\nERROR: getstring did not return 0\n");
			break;
		}
		
		size_t len = strlen(istr);

		if (len > 0 && istr[len - 1] == '\n')
		{
			istr[len - 1] = '\0';
		}
		

		writestring("you entered: ");
		writestring(istr);
		writestring("len: ");
		print_uint((uint32_t) len);
		writestring("\nfirst char: ");
		writechar(*istr);

		writestring(" ASCII -> ");
    
		for (size_t n = 0; n < (len + 1); n++)
		{
			print_uint(istr[n]);
			writechar(' ');
		}
      
		writechar('\n');

		if (strcmp(istr, "exit") == 0)
		{
			return 0;
		}
	}
	
	return 0;
}