72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
#ifndef UTIL_PRINTER_C
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#define UTIL_PRINTER_C
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#include <stdarg.h>
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#include "../terminal.c"
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/**
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* fmt is a string with specifiers where variables can be inserted.
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*
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* ex: ("Hello %s", "world") -> "Hello world"
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*
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* Specifiers are
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* - %c: character
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* - %d: digit (integer)
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* - %x: hexadecimal value. Can be used to print pointers to
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* - %b: binary value. Digits with base 2
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* @param fmt Formatter string
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* @param ... Variable amount of arguments to be inserted
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*/
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void print(const char *fmt, ...) {
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const char *p;
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va_list argp;
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int i;
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char *s;
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char fmtbuf[256];
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va_start(argp, fmt);
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for (p = fmt; *p != '\0'; p++)
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if (*p != '%') {
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terminal_putchar(*p);
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} else {
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switch (*++p) {
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case 'c':
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i = va_arg(argp, int);
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terminal_putchar((char) i);
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break;
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case 'd':
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i = va_arg(argp, int);
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s = itoa(i, fmtbuf, 10);
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terminal_writestring(s);
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break;
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case 's':
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s = va_arg(argp, char *);
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terminal_writestring(s);
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break;
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case 'x':
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terminal_writestring("0x");
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i = va_arg(argp, int);
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s = itoa(i, fmtbuf, 16);
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terminal_writestring(s);
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break;
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case 'b':
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terminal_writestring("0b");
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i = va_arg(argp, int);
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s = itoa(i, fmtbuf, 2);
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terminal_writestring(s);
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break;
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case '%':
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terminal_putchar('%');
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break;
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}
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}
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va_end(argp);
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}
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#endif //UTIL_PRINTER_C
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