412 lines
10 KiB
C
412 lines
10 KiB
C
// TuxSH's changes: add support for 64-bit numbers, remove floating-point code
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// TODO! fix left-padding handling with > 10 characters.
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#include "fmt.h"
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#include "strings.h"
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/* File : barebones/ee_printf.c
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This file contains an implementation of ee_printf that only requires a method to output a char to a UART without pulling in library code.
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This code is based on a file that contains the following:
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Copyright (C) 2002 Michael Ringgaard. All rights reserved.
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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 project nor the names of its 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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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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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//#include <coremark.h>
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//#include <stdarg.h>
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#define ZEROPAD (1<<0) /* Pad with zero */
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#define SIGN (1<<1) /* Unsigned/signed long */
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#define PLUS (1<<2) /* Show plus */
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#define SPACE (1<<3) /* Spacer */
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#define LEFT (1<<4) /* Left justified */
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#define HEX_PREP (1<<5) /* 0x */
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#define UPPERCASE (1<<6) /* 'ABCDEF' */
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#define is_digit(c) ((c) >= '0' && (c) <= '9')
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static char *lower_digits = "0123456789abcdefghijklmnopqrstuvwxyz";
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static char *upper_digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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/*
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static size_t strnlen(const char *s, size_t count);
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static size_t strnlen(const char *s, size_t count)
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{
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const char *sc;
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for (sc = s; *sc != '\0' && count--; ++sc);
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return sc - s;
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}
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*/
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static int ee_skip_atoi(const char **s)
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{
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int i = 0;
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while (is_digit(**s)) i = i*10 + *((*s)++) - '0';
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return i;
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}
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static char *ee_number(char *str, long long num, int base, int size, int precision, int type)
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{
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char c, sign, tmp[66];
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char *dig = lower_digits;
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int i;
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if (type & UPPERCASE) dig = upper_digits;
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if (type & LEFT) type &= ~ZEROPAD;
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if (base < 2 || base > 36) 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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{
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if (num < 0)
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{
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sign = '-';
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num = -num;
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size--;
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}
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else if (type & PLUS)
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{
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sign = '+';
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size--;
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}
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else if (type & SPACE)
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{
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sign = ' ';
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size--;
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}
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}
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if (type & HEX_PREP)
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{
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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
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{
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while (num != 0)
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{
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tmp[i++] = dig[(unsigned long long)num % (unsigned long long)base];
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num = (long long)((unsigned long long)num / (unsigned long long) base);
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}
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}
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if (i > precision) precision = i;
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size -= precision;
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if (!(type & (ZEROPAD | LEFT))) while (size-- > 0) *str++ = ' ';
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if (sign) *str++ = sign;
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if (type & HEX_PREP)
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{
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if (base == 8)
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*str++ = '0';
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else if (base == 16)
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{
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*str++ = '0';
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*str++ = lower_digits[33];
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}
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}
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if (!(type & LEFT)) while (size-- > 0) *str++ = c;
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while (i < precision--) *str++ = '0';
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while (i-- > 0) *str++ = tmp[i];
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while (size-- > 0) *str++ = ' ';
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return str;
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}
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static char *eaddr(char *str, unsigned char *addr, int size, int precision __attribute__((unused)), int type)
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{
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char tmp[24];
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char *dig = lower_digits;
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int i, len;
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if (type & UPPERCASE) dig = upper_digits;
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len = 0;
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for (i = 0; i < 6; i++)
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{
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if (i != 0) tmp[len++] = ':';
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tmp[len++] = dig[addr[i] >> 4];
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tmp[len++] = dig[addr[i] & 0x0F];
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}
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if (!(type & LEFT)) while (len < size--) *str++ = ' ';
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for (i = 0; i < len; ++i) *str++ = tmp[i];
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while (len < size--) *str++ = ' ';
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return str;
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}
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static char *iaddr(char *str, unsigned char *addr, int size, int precision __attribute__((unused)), int type)
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{
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char tmp[24];
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int i, n, len;
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len = 0;
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for (i = 0; i < 4; i++)
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{
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if (i != 0) tmp[len++] = '.';
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n = addr[i];
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if (n == 0)
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tmp[len++] = lower_digits[0];
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else
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{
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if (n >= 100)
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{
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tmp[len++] = lower_digits[n / 100];
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n = n % 100;
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tmp[len++] = lower_digits[n / 10];
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n = n % 10;
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}
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else if (n >= 10)
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{
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tmp[len++] = lower_digits[n / 10];
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n = n % 10;
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}
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tmp[len++] = lower_digits[n];
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}
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}
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if (!(type & LEFT)) while (len < size--) *str++ = ' ';
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for (i = 0; i < len; ++i) *str++ = tmp[i];
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while (len < size--) *str++ = ' ';
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return str;
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}
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static int ee_vsprintf(char *buf, const char *fmt, va_list args)
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{
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int len;
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long long num;
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int i, base;
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char *str;
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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 number of chars for from string
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int qualifier; // 'h', 'l', or 'L' for integer fields
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int qualifier2;
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for (str = buf; *fmt; fmt++)
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{
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if (*fmt != '%')
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{
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*str++ = *fmt;
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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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{
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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 |= HEX_PREP; 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 = ee_skip_atoi(&fmt);
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else if (*fmt == '*')
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{
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fmt++;
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field_width = va_arg(args, int);
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if (field_width < 0)
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{
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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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{
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++fmt;
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if (is_digit(*fmt))
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precision = ee_skip_atoi(&fmt);
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else if (*fmt == '*')
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{
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++fmt;
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precision = va_arg(args, int);
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}
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if (precision < 0) precision = 0;
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}
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// Get the conversion qualifier
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qualifier = qualifier2 = -1;
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if(*fmt == 'L')
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qualifier = *fmt++;
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else if (*fmt == 'l')
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{
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qualifier = *fmt++;
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if(*fmt == 'l') qualifier2 = *fmt++;
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}
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else if (*fmt == 'h')
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{
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qualifier = *fmt++;
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if(*fmt == 'h') qualifier2 = *fmt++;
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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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{
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case 'c':
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if (!(flags & LEFT)) while (--field_width > 0) *str++ = ' ';
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*str++ = (unsigned char) va_arg(args, int);
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while (--field_width > 0) *str++ = ' ';
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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) s = "<NULL>";
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if(precision != -1)
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len = strnlen(s, precision);
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else
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len = strlen(s);
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if (!(flags & LEFT)) while (len < field_width--) *str++ = ' ';
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for (i = 0; i < len; ++i) *str++ = *s++;
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while (len < field_width--) *str++ = ' ';
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continue;
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case 'p':
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if (field_width == -1)
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{
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field_width = 2 * sizeof(void *);
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flags |= ZEROPAD;
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}
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str = ee_number(str, (unsigned long) va_arg(args, void *), 16, field_width, precision, flags);
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continue;
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case 'A':
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flags |= UPPERCASE;
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case 'a':
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if (qualifier == 'l')
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str = eaddr(str, va_arg(args, unsigned char *), field_width, precision, flags);
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else
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str = iaddr(str, va_arg(args, unsigned char *), field_width, precision, flags);
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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 |= UPPERCASE;
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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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if (*fmt != '%') *str++ = '%';
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if (*fmt)
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*str++ = *fmt;
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else
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--fmt;
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continue;
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}
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// bugfixes here:
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if(flags & SIGN)
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{
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if (qualifier == 'l' && qualifier2 == 'l')
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num = va_arg(args, long long int);
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else if(qualifier == 'l')
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num = va_arg(args, long int);
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/* else if(qualifier == 'h' && qualifier == 'h')
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num = va_arg(args, signed char);
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else if(qualifier == 'h')
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num = va_arg(args, short);*/
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else
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num = va_arg(args, int);
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}
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else
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{
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if (qualifier == 'l' && qualifier2 == 'l')
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num = va_arg(args, unsigned long long int);
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else if(qualifier == 'l')
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num = va_arg(args, unsigned long int);
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/* else if(qualifier == 'h' && qualifier == 'h')
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num = va_arg(args, unsigned char);
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else if(qualifier == 'h')
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num = va_arg(args, unsigned short);*/
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else
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num = va_arg(args, unsigned int);
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}
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str = ee_number(str, num, base, field_width, precision, flags);
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}
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*str = '\0';
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return str - buf;
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}
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int vsprintf(char *buf, const char *fmt, va_list args)
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{
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return ee_vsprintf(buf, fmt, args);
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}
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int sprintf(char *buf, const char *fmt, ...)
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{
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int n = 0;
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va_list args;
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va_start(args, fmt);
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n = ee_vsprintf(buf, fmt, args);
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va_end(args);
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return n;
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}
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