scoutos / prex-0.9.0 / bsp / boot / common / printf.c @ 03e9c04a
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/*-
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* Copyright (c) 2005, Kohsuke Ohtani
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* printf.c - print formatted string
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*/
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#include <sys/types.h> |
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#include <machine/stdarg.h> |
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#include <boot.h> |
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#include <machdep.h> /* for debug_putc */ |
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#ifdef DEBUG
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void
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printf(const char *fmt, ...) |
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{ |
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static const char digits[] = "0123456789abcdef"; |
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va_list ap; |
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char buf[10]; |
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char *s;
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unsigned u;
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int c, i, pad;
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va_start(ap, fmt); |
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while ((c = *fmt++) != 0) { |
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if (c == '%') { |
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c = *fmt++; |
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/* ignore long */
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if (c == 'l') |
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c = *fmt++; |
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switch (c) {
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case 'c': |
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debug_putc(va_arg(ap, int));
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continue;
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case 's': |
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s = va_arg(ap, char *);
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if (s == NULL) |
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s = "<NULL>";
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for (; *s; s++) {
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debug_putc((int)*s);
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} |
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continue;
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case 'd': |
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c = 'u';
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case 'u': |
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case 'x': |
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u = va_arg(ap, unsigned);
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s = buf; |
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if (c == 'u') { |
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do
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*s++ = digits[u % 10U];
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while (u /= 10U); |
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} else {
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pad = 0;
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for (i = 0; i < 8; i++) { |
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if (pad)
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*s++ = '0';
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else {
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*s++ = digits[u % 16U];
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if ((u /= 16U) == 0) |
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pad = 1;
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} |
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} |
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} |
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while (--s >= buf)
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debug_putc((int)*s);
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continue;
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} |
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} |
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if (c == '\n') |
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debug_putc('\r');
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debug_putc((int)c);
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} |
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va_end(ap); |
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} |
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#endif /* !DEBUG */ |