317 lines
6.8 KiB
C
317 lines
6.8 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* vtxprintf.c, originally from linux/lib/vsprintf.c
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*/
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#include <console/console.h>
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#include <console/vtxprintf.h>
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#include <string.h>
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#define call_tx(x) tx_byte(x, data)
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#if !CONFIG_ARCH_MIPS
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#define SUPPORT_64BIT_INTS
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#endif
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/* haha, don't need ctype.c */
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#define isdigit(c) ((c) >= '0' && (c) <= '9')
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#define is_digit isdigit
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#define isxdigit(c) (((c) >= '0' && (c) <= '9') || ((c) >= 'a' && (c) <= 'f') || ((c) >= 'A' && (c) <= 'F'))
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static int skip_atoi(const char **s)
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{
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int i=0;
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while (is_digit(**s))
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i = i*10 + *((*s)++) - '0';
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return i;
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}
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#define ZEROPAD 1 /* pad with zero */
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#define SIGN 2 /* unsigned/signed long */
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#define PLUS 4 /* show plus */
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#define SPACE 8 /* space if plus */
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#define LEFT 16 /* left justified */
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#define SPECIAL 32 /* 0x */
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#define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
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static int number(void (*tx_byte)(unsigned char byte, void *data),
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unsigned long long inum, int base, int size, int precision, int type,
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void *data)
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{
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char c,sign,tmp[66];
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const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
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int i;
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int count = 0;
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#ifdef SUPPORT_64BIT_INTS
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unsigned long long num = inum;
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#else
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unsigned long num = (long)inum;
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if (num != inum) {
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/* Alert user to an incorrect result by printing #^!. */
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call_tx('#');
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call_tx('^');
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call_tx('!');
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}
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#endif
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if (type & LARGE)
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digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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if (type & LEFT)
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type &= ~ZEROPAD;
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if (base < 2 || base > 36)
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return 0;
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c = (type & ZEROPAD) ? '0' : ' ';
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sign = 0;
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if (type & SIGN) {
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if ((signed long long)num < 0) {
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sign = '-';
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num = -num;
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size--;
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} else if (type & PLUS) {
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sign = '+';
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size--;
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} else if (type & SPACE) {
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sign = ' ';
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size--;
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}
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}
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if (type & SPECIAL) {
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if (base == 16)
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size -= 2;
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else if (base == 8)
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size--;
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}
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i = 0;
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if (num == 0)
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tmp[i++]='0';
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else while (num != 0){
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tmp[i++] = digits[num % base];
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num /= base;
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}
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if (i > precision)
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precision = i;
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size -= precision;
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if (!(type&(ZEROPAD+LEFT)))
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while(size-->0)
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call_tx(' '), count++;
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if (sign)
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call_tx(sign), count++;
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if (type & SPECIAL) {
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if (base==8)
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call_tx('0'), count++;
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else if (base==16) {
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call_tx('0'), count++;
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call_tx(digits[33]), count++;
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}
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}
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if (!(type & LEFT))
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while (size-- > 0)
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call_tx(c), count++;
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while (i < precision--)
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call_tx('0'), count++;
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while (i-- > 0)
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call_tx(tmp[i]), count++;
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while (size-- > 0)
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call_tx(' '), count++;
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return count;
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}
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int vtxprintf(void (*tx_byte)(unsigned char byte, void *data),
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const char *fmt, va_list args, void *data)
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{
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int len;
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unsigned long long num;
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int i, base;
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const char *s;
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int flags; /* flags to number() */
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int field_width; /* width of output field */
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int precision; /* min. # of digits for integers; max
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number of chars for from string */
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int qualifier; /* 'h', 'H', 'l', or 'L' for integer fields */
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int count;
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for (count=0; *fmt ; ++fmt) {
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if (*fmt != '%') {
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call_tx(*fmt), count++;
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continue;
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}
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/* process flags */
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flags = 0;
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repeat:
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++fmt; /* this also skips first '%' */
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switch (*fmt) {
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case '-': flags |= LEFT; goto repeat;
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case '+': flags |= PLUS; goto repeat;
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case ' ': flags |= SPACE; goto repeat;
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case '#': flags |= SPECIAL; goto repeat;
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case '0': flags |= ZEROPAD; goto repeat;
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}
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/* get field width */
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field_width = -1;
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if (is_digit(*fmt))
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field_width = skip_atoi(&fmt);
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else if (*fmt == '*') {
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++fmt;
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/* it's the next argument */
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field_width = va_arg(args, int);
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if (field_width < 0) {
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field_width = -field_width;
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flags |= LEFT;
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}
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}
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/* get the precision */
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precision = -1;
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if (*fmt == '.') {
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++fmt;
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if (is_digit(*fmt))
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precision = skip_atoi(&fmt);
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else if (*fmt == '*') {
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++fmt;
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/* it's the next argument */
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precision = va_arg(args, int);
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}
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if (precision < 0)
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precision = 0;
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}
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/* get the conversion qualifier */
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qualifier = -1;
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if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || *fmt == 'z') {
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qualifier = *fmt;
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++fmt;
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if (*fmt == 'l') {
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qualifier = 'L';
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++fmt;
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}
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if (*fmt == 'h') {
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qualifier = 'H';
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++fmt;
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}
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}
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/* default base */
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base = 10;
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switch (*fmt) {
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case 'c':
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if (!(flags & LEFT))
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while (--field_width > 0)
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call_tx(' '), count++;
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call_tx((unsigned char) va_arg(args, int)), count++;
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while (--field_width > 0)
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call_tx(' '), count++;
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continue;
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case 's':
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s = va_arg(args, char *);
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if (!s)
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s = "<NULL>";
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len = strnlen(s, precision);
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if (!(flags & LEFT))
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while (len < field_width--)
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call_tx(' '), count++;
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for (i = 0; i < len; ++i)
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call_tx(*s++), count++;
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while (len < field_width--)
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call_tx(' '), count++;
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continue;
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case 'p':
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if (field_width == -1) {
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field_width = 2*sizeof(void *);
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flags |= ZEROPAD;
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}
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count += number(tx_byte,
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(unsigned long) va_arg(args, void *), 16,
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field_width, precision, flags, data);
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continue;
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case 'n':
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if (qualifier == 'L') {
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long long *ip = va_arg(args, long long *);
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*ip = count;
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} else if (qualifier == 'l') {
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long * ip = va_arg(args, long *);
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*ip = count;
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} else {
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int * ip = va_arg(args, int *);
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*ip = count;
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}
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continue;
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case '%':
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call_tx('%'), count++;
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continue;
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/* integer number formats - set up the flags and "break" */
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case 'o':
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base = 8;
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break;
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case 'X':
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flags |= LARGE;
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case 'x':
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base = 16;
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break;
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case 'd':
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case 'i':
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flags |= SIGN;
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case 'u':
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break;
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default:
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call_tx('%'), count++;
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if (*fmt)
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call_tx(*fmt), count++;
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else
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--fmt;
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continue;
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}
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if (qualifier == 'L') {
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num = va_arg(args, unsigned long long);
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} else if (qualifier == 'l') {
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num = va_arg(args, unsigned long);
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} else if (qualifier == 'z') {
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num = va_arg(args, size_t);
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} else if (qualifier == 'h') {
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num = (unsigned short) va_arg(args, int);
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if (flags & SIGN)
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num = (short) num;
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} else if (qualifier == 'H') {
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num = (unsigned char) va_arg(args, int);
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if (flags & SIGN)
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num = (signed char) num;
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} else if (flags & SIGN) {
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num = va_arg(args, int);
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} else {
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num = va_arg(args, unsigned int);
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}
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count += number(tx_byte, num, base, field_width, precision, flags, data);
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}
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return count;
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}
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