/*
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* linux/lib/vsprintf.c
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*/
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/* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
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/*
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* Wirzenius wrote this portably, Torvalds fucked it up :-)
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*/
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#include <common.h>
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void * memset(void * s,int c,size_t count)
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{
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unsigned long *sl = (unsigned long *) s;
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unsigned long cl = 0;
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char *s8;
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int i;
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/* do it one word at a time (32 bits or 64 bits) while possible */
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if ( ((ulong)s & (sizeof(*sl) - 1)) == 0) {
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for (i = 0; i < sizeof(*sl); i++) {
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cl <<= 8;
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cl |= c & 0xff;
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}
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while (count >= sizeof(*sl)) {
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*sl++ = cl;
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count -= sizeof(*sl);
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}
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}
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/* fill 8 bits at a time */
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s8 = (char *)sl;
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while (count--)
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*s8++ = c;
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return s;
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}
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#ifdef CONFIG_PRINTF_DBG
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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; count-- && *sc != '\0'; ++sc)
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/* nothing */ ;
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return sc - s;
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}
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#define is_digit(c) ((c) >= '0' && (c) <= '9')
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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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#ifdef CFG_64BIT_VSPRINTF
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#define do_div(n,base) ({ \
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unsigned int __res; \
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__res = ((unsigned long long) n) % base; \
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n = ((unsigned long long) n) / base; \
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__res; \
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})
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#else
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#define do_div(n,base) ({ \
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int __res; \
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__res = ((unsigned long) n) % base; \
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n = ((unsigned long) n) / base; \
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__res; \
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})
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#endif
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#ifdef CFG_64BIT_VSPRINTF
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static char *number(char *str, long long num, unsigned int base, int size, int precision, int type)
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#else
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static char *number(char *str, long num, unsigned int base, int size, int precision, int type)
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#endif
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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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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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{
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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 & SPECIAL)
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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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while (num != 0)
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tmp[i++] = digits[do_div(num, base)];
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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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*str++ = ' ';
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if (sign)
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*str++ = sign;
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if (type & SPECIAL)
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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++ = digits[33];
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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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*str++ = c;
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while (i < precision--)
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*str++ = '0';
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while (i-- > 0)
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*str++ = tmp[i];
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while (size-- > 0)
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*str++ = ' ';
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return str;
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}
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/* Forward decl. needed for IP address printing stuff... */
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int sprintf(char *buf, const char *fmt, ...);
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int vsprintf(char *buf, const char *fmt, va_list args)
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{
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int len;
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#ifdef CFG_64BIT_VSPRINTF
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unsigned long long num;
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#else
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unsigned long num;
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#endif
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int i, base;
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char *str;
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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', 'l', or 'q' for integer fields */
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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 '-':
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flags |= LEFT;
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goto repeat;
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case '+':
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flags |= PLUS;
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goto repeat;
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case ' ':
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flags |= SPACE;
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goto repeat;
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case '#':
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flags |= SPECIAL;
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goto repeat;
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case '0':
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flags |= ZEROPAD;
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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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{
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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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{
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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 = skip_atoi(&fmt);
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else if (*fmt == '*')
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{
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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' ||
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*fmt == 'Z' || *fmt == 'z' || *fmt == 't' || *fmt == 'q')
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{
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qualifier = *fmt;
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if (qualifier == 'l' && *(fmt + 1) == 'l')
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{
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qualifier = 'q';
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++fmt;
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}
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++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))
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while (--field_width > 0)
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*str++ = ' ';
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*str++ = (unsigned char)va_arg(args, int);
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while (--field_width > 0)
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*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)
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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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*str++ = ' ';
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for (i = 0; i < len; ++i)
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*str++ = *s++;
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while (len < field_width--)
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*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 = number(str,
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(unsigned long)va_arg(args, void *), 16, field_width, precision, flags);
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continue;
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case 'n':
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if (qualifier == 'l')
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{
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long *ip = va_arg(args, long *);
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*ip = (str - buf);
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}
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else
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{
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int *ip = va_arg(args, int *);
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*ip = (str - buf);
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}
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continue;
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case '%':
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*str++ = '%';
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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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*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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#ifdef CFG_64BIT_VSPRINTF
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if (qualifier == 'q') /* "quad" for 64 bit variables */
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num = va_arg(args, unsigned long long);
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else
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#endif
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if (qualifier == 'l')
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{
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num = va_arg(args, unsigned long);
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}
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else if (qualifier == 'Z' || qualifier == 'z')
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{
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num = va_arg(args, size_t);
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}
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else if (qualifier == 't')
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{
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num = va_arg(args, ptrdiff_t);
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}
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else if (qualifier == 'h')
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{
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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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}
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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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str = 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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void printf(const char *fmt, ...)
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{
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va_list args;
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uint i;
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char printbuffer[CFG_PBSIZE];
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va_start(args, fmt);
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/* For this to work, printbuffer must be larger than
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* anything we ever want to print.
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*/
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i = vsprintf(printbuffer, fmt, args);
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va_end(args);
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serial_puts(printbuffer);
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}
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int sprintf(char *buf, const char *fmt, ...)
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{
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va_list args;
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int i;
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va_start(args, fmt);
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i = vsprintf(buf, fmt, args);
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va_end(args);
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return i;
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}
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#else
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void printf(const char *fmt, ...)
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{
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}
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#endif /*Define CONFIG_PRINTF_DBG */
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