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-rw-r--r--sample/printf.c316
1 files changed, 0 insertions, 316 deletions
diff --git a/sample/printf.c b/sample/printf.c
deleted file mode 100644
index 6b7dda24..00000000
--- a/sample/printf.c
+++ /dev/null
@@ -1,316 +0,0 @@
-/*
- * Oh, it's a waste of space, but oh-so-yummy for debugging. It's just
- * initialization code anyway, so it doesn't take up space when we're
- * actually running. This version of printf() does not include 64-bit
- * support. "Live with it."
- *
- * Most of this code was shamelessly snarfed from the Linux kernel, then
- * modified.
- *
- * FIX THIS: Replace printf() implementation with BSD/MIT-licensed one
- * from klibc
- */
-
-#include <stdarg.h>
-
-int puts(const char *);
-
-static inline int isdigit(int ch)
-{
- return (ch >= '0') && (ch <= '9');
-}
-
-unsigned int skip_atou(const char **s);
-unsigned int atou(const char *s);
-
-static int strnlen(const char *s, int maxlen)
-{
- const char *es = s;
- while (*es && maxlen) {
- es++;
- maxlen--;
- }
-
- return (es - s);
-}
-
-#define ZEROPAD 1 /* pad with zero */
-#define SIGN 2 /* unsigned/signed long */
-#define PLUS 4 /* show plus */
-#define SPACE 8 /* space if plus */
-#define LEFT 16 /* left justified */
-#define SPECIAL 32 /* 0x */
-#define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
-
-#define do_div(n,base) ({ \
-int __res; \
-__res = ((unsigned long) n) % (unsigned) base; \
-n = ((unsigned long) n) / (unsigned) base; \
-__res; })
-
-static char *number(char *str, long num, int base, int size, int precision,
- int type)
-{
- char c, sign, tmp[66];
- const char *digits = "0123456789abcdefghijklmnopqrstuvwxyz";
- int i;
-
- if (type & LARGE)
- digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
- if (type & LEFT)
- type &= ~ZEROPAD;
- if (base < 2 || base > 36)
- return 0;
- c = (type & ZEROPAD) ? '0' : ' ';
- sign = 0;
- if (type & SIGN) {
- if (num < 0) {
- sign = '-';
- num = -num;
- size--;
- } else if (type & PLUS) {
- sign = '+';
- size--;
- } else if (type & SPACE) {
- sign = ' ';
- size--;
- }
- }
- if (type & SPECIAL) {
- if (base == 16)
- size -= 2;
- else if (base == 8)
- size--;
- }
- i = 0;
- if (num == 0)
- tmp[i++] = '0';
- else
- while (num != 0)
- tmp[i++] = digits[do_div(num, base)];
- if (i > precision)
- precision = i;
- size -= precision;
- if (!(type & (ZEROPAD + LEFT)))
- while (size-- > 0)
- *str++ = ' ';
- if (sign)
- *str++ = sign;
- if (type & SPECIAL) {
- if (base == 8)
- *str++ = '0';
- else if (base == 16) {
- *str++ = '0';
- *str++ = digits[33];
- }
- }
- if (!(type & LEFT))
- while (size-- > 0)
- *str++ = c;
- while (i < precision--)
- *str++ = '0';
- while (i-- > 0)
- *str++ = tmp[i];
- while (size-- > 0)
- *str++ = ' ';
- return str;
-}
-
-/* Forward decl. needed for IP address printing stuff... */
-int sprintf(char *buf, const char *fmt, ...);
-
-int vsprintf(char *buf, const char *fmt, va_list args)
-{
- int len;
- unsigned long num;
- int i, base;
- char *str;
- const char *s;
-
- int flags; /* flags to number() */
-
- int field_width; /* width of output field */
- int precision; /* min. # of digits for integers; max
- number of chars for from string */
- int qualifier; /* 'h', 'l', or 'L' for integer fields */
-
- for (str = buf; *fmt; ++fmt) {
- if (*fmt != '%') {
- *str++ = *fmt;
- continue;
- }
-
- /* process flags */
- flags = 0;
-repeat:
- ++fmt; /* this also skips first '%' */
- switch (*fmt) {
- case '-':
- flags |= LEFT;
- goto repeat;
- case '+':
- flags |= PLUS;
- goto repeat;
- case ' ':
- flags |= SPACE;
- goto repeat;
- case '#':
- flags |= SPECIAL;
- goto repeat;
- case '0':
- flags |= ZEROPAD;
- goto repeat;
- }
-
- /* get field width */
- field_width = -1;
- if (isdigit(*fmt))
- field_width = skip_atou(&fmt);
- else if (*fmt == '*') {
- ++fmt;
- /* it's the next argument */
- field_width = va_arg(args, int);
- if (field_width < 0) {
- field_width = -field_width;
- flags |= LEFT;
- }
- }
-
- /* get the precision */
- precision = -1;
- if (*fmt == '.') {
- ++fmt;
- if (isdigit(*fmt))
- precision = skip_atou(&fmt);
- else if (*fmt == '*') {
- ++fmt;
- /* it's the next argument */
- precision = va_arg(args, int);
- }
- if (precision < 0)
- precision = 0;
- }
-
- /* get the conversion qualifier */
- qualifier = -1;
- if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L') {
- qualifier = *fmt;
- ++fmt;
- }
-
- /* default base */
- base = 10;
-
- switch (*fmt) {
- case 'c':
- if (!(flags & LEFT))
- while (--field_width > 0)
- *str++ = ' ';
- *str++ = (unsigned char)va_arg(args, int);
- while (--field_width > 0)
- *str++ = ' ';
- continue;
-
- case 's':
- s = va_arg(args, char *);
- len = strnlen(s, precision);
-
- if (!(flags & LEFT))
- while (len < field_width--)
- *str++ = ' ';
- for (i = 0; i < len; ++i)
- *str++ = *s++;
- while (len < field_width--)
- *str++ = ' ';
- continue;
-
- case 'p':
- if (field_width == -1) {
- field_width = 2 * sizeof(void *);
- flags |= ZEROPAD;
- }
- str = number(str,
- (unsigned long)va_arg(args, void *), 16,
- field_width, precision, flags);
- continue;
-
- case 'n':
- if (qualifier == 'l') {
- long *ip = va_arg(args, long *);
- *ip = (str - buf);
- } else {
- int *ip = va_arg(args, int *);
- *ip = (str - buf);
- }
- continue;
-
- case '%':
- *str++ = '%';
- continue;
-
- /* integer number formats - set up the flags and "break" */
- case 'o':
- base = 8;
- break;
-
- case 'X':
- flags |= LARGE;
- case 'x':
- base = 16;
- break;
-
- case 'd':
- case 'i':
- flags |= SIGN;
- case 'u':
- break;
-
- default:
- *str++ = '%';
- if (*fmt)
- *str++ = *fmt;
- else
- --fmt;
- continue;
- }
- if (qualifier == 'l')
- num = va_arg(args, unsigned long);
- else if (qualifier == 'h') {
- num = (unsigned short)va_arg(args, int);
- if (flags & SIGN)
- num = (short)num;
- } else if (flags & SIGN)
- num = va_arg(args, int);
- else
- num = va_arg(args, unsigned int);
- str = number(str, num, base, field_width, precision, flags);
- }
- *str = '\0';
- return str - buf;
-}
-
-int sprintf(char *buf, const char *fmt, ...)
-{
- va_list args;
- int i;
-
- va_start(args, fmt);
- i = vsprintf(buf, fmt, args);
- va_end(args);
- return i;
-}
-
-int printf(const char *fmt, ...)
-{
- char printf_buf[1024];
- va_list args;
- int printed;
-
- va_start(args, fmt);
- printed = vsprintf(printf_buf, fmt, args);
- va_end(args);
-
- puts(printf_buf);
-
- return printed;
-}