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support widths in printf

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This commit is contained in:
Justin C. Miller
2018-04-25 19:52:27 -07:00
parent bed882f41c
commit 2404b22c1f
2 changed files with 60 additions and 26 deletions
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68
src/kernel/console.cpp
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@@ -244,6 +244,7 @@ console::puts(const char *message)
while (message && *message) {
char c = *message++;
if (m_screen) m_screen->putc(c);
serial_write(c);
if (c == '\n') serial_write('\r');
}
@@ -271,37 +272,60 @@ void console::printf(const char *fmt, ...)
continue;
}
r++; // chomp the %
flush();
r++; // chomp the %
switch (*r++) {
case '%': *w = '%'; break;
bool done = false;
bool right = true;
int width = 0;
case 'x': put_hex<uint32_t>(va_arg(args, uint32_t)); break;
while (!done) {
char c = *r++;
switch (c) {
case '%': *w = '%'; done = true; break;
case 'd':
case 'u': put_dec<uint32_t>(va_arg(args, uint32_t)); break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': width = width * 10 + (c - '0'); break;
case 's': {
const char *s = va_arg(args, const char*);
if (s) puts(s);
}
break;
case '-': right = !right; break;
case 'l':
switch (*r++) {
case 'x': put_hex<uint64_t>(va_arg(args, uint64_t)); break;
case 'x': put_hex<uint32_t>(va_arg(args, uint32_t), right ? width : -width); done = true; break;
case 'd':
case 'u': put_dec<uint32_t>(va_arg(args, uint64_t)); break;
case 'd':
case 'u': put_dec<uint32_t>(va_arg(args, uint32_t), right ? width : -width); done = true; break;
default:
break;
}
break;
case 's': {
const char *s = va_arg(args, const char*);
if (s) puts(s);
}
done = true;
break;
default:
break;
case 'l':
switch (*r++) {
case 'x': put_hex<uint64_t>(va_arg(args, uint64_t), right ? width : -width); done = true; break;
case 'd':
case 'u': put_dec<uint32_t>(va_arg(args, uint64_t), right ? width : -width); done = true; break;
default:
done = true;
break;
}
break;
default:
done = true;
break;
}
}
}