[OpenBIOS] r148 - openbios-devel/libc
svn at openbios.org
svn at openbios.org
Sat May 19 14:51:04 CEST 2007
Author: blueswirl
Date: 2007-05-19 14:51:04 +0200 (Sat, 19 May 2007)
New Revision: 148
Modified:
openbios-devel/libc/vsprintf.c
Log:
Update vsprintf.c from Linux to get 64-bit output
Modified: openbios-devel/libc/vsprintf.c
===================================================================
--- openbios-devel/libc/vsprintf.c 2007-05-17 19:16:06 UTC (rev 147)
+++ openbios-devel/libc/vsprintf.c 2007-05-19 12:51:04 UTC (rev 148)
@@ -5,7 +5,7 @@
/*
* linux/lib/vsprintf.c
*
- * Copyright (C) 1991, 1992, Linus Torvalds
+ * Copyright (C) 1991, 1992 Linus Torvalds
*/
/* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
@@ -13,18 +13,20 @@
* Wirzenius wrote this portably, Torvalds fucked it up :-)
*/
+/*
+ * Fri Jul 13 2001 Crutcher Dunnavant <crutcher+kernel at datastacks.com>
+ * - changed to provide snprintf and vsnprintf functions
+ */
+
#include "openbios/config.h"
#include "libc/string.h"
#include "libc/vsprintf.h"
-/* we use this so that we can do without the ctype library */
-#define is_digit(c) ((c) >= '0' && (c) <= '9')
-
static int skip_atoi(const char **s)
{
int i=0;
- while (is_digit(**s))
+ while (isdigit(**s))
i = i*10 + *((*s)++) - '0';
return i;
}
@@ -39,21 +41,25 @@
#define do_div(n,base) ({ \
int __res; \
-__res = ((unsigned long) n) % (unsigned) base; \
-n = ((unsigned long) n) / (unsigned) base; \
+__res = ((unsigned long long) n) % (unsigned) base; \
+n = ((unsigned long long) n) / (unsigned) base; \
__res; })
static int mstrlen( const char *str );
-static char * number(char * str, long num, int base, int size, int precision
- ,int type)
+#ifndef PAGE_SIZE
+#define PAGE_SIZE 4096
+#endif
+
+static char * number(char * buf, char * end, long long num, int base, int size, int precision, int type)
{
char c,sign,tmp[66];
- const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
+ const char *digits;
+ static const char small_digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
+ static const char large_digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
int i;
- if (type & LARGE)
- digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+ digits = (type & LARGE) ? large_digits : small_digits;
if (type & LEFT)
type &= ~ZEROPAD;
if (base < 2 || base > 36)
@@ -82,52 +88,78 @@
i = 0;
if (num == 0)
tmp[i++]='0';
- else while (num != 0) {
-#if 0
+ else while (num != 0)
tmp[i++] = digits[do_div(num,base)];
-#endif
- int __res;
- __res = ((unsigned long) num) % (unsigned) base;
- num = ((unsigned long) num) / (unsigned) base;
- tmp[i++] = digits[__res];
- }
if (i > precision)
precision = i;
size -= precision;
- if (!(type&(ZEROPAD+LEFT)))
- while(size-->0)
- *str++ = ' ';
- if (sign)
- *str++ = sign;
+ if (!(type&(ZEROPAD+LEFT))) {
+ while(size-->0) {
+ if (buf <= end)
+ *buf = ' ';
+ ++buf;
+ }
+ }
+ if (sign) {
+ if (buf <= end)
+ *buf = sign;
+ ++buf;
+ }
if (type & SPECIAL) {
- if (base==8)
- *str++ = '0';
- else if (base==16) {
- *str++ = '0';
- *str++ = digits[33];
+ if (base==8) {
+ if (buf <= end)
+ *buf = '0';
+ ++buf;
+ } else if (base==16) {
+ if (buf <= end)
+ *buf = '0';
+ ++buf;
+ if (buf <= end)
+ *buf = digits[33];
+ ++buf;
}
}
- 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;
+ if (!(type & LEFT)) {
+ while (size-- > 0) {
+ if (buf <= end)
+ *buf = c;
+ ++buf;
+ }
+ }
+ while (i < precision--) {
+ if (buf <= end)
+ *buf = '0';
+ ++buf;
+ }
+ while (i-- > 0) {
+ if (buf <= end)
+ *buf = tmp[i];
+ ++buf;
+ }
+ while (size-- > 0) {
+ if (buf <= end)
+ *buf = ' ';
+ ++buf;
+ }
+ return buf;
}
-/* Forward decl. to keep compiler happy. */
-//static int vsprintf(char *buf, const char *fmt, va_list args);
-
-int vsprintf(char *buf, const char *fmt, va_list args)
+/**
+* vsnprintf - Format a string and place it in a buffer
+* @buf: The buffer to place the result into
+* @size: The size of the buffer, including the trailing null space
+* @fmt: The format string to use
+* @args: Arguments for the format string
+*
+* Call this function if you are already dealing with a va_list.
+* You probably want snprintf instead.
+ */
+int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
{
int len;
- unsigned long num;
+ unsigned long long num;
int i, base;
- char * str;
+ char *str, *end, c;
const char *s;
int flags; /* flags to number() */
@@ -136,13 +168,25 @@
int precision; /* min. # of digits for integers; max
number of chars for from string */
int qualifier; /* 'h', 'l', or 'L' for integer fields */
+ /* 'z' support added 23/7/1999 S.H. */
+ /* 'z' changed to 'Z' --davidm 1/25/99 */
- for (str=buf ; *fmt ; ++fmt) {
+ str = buf;
+ end = buf + size - 1;
+
+ if (end < buf - 1) {
+ end = ((void *) -1);
+ size = end - buf + 1;
+ }
+
+ for (; *fmt ; ++fmt) {
if (*fmt != '%') {
- *str++ = *fmt;
+ if (str <= end)
+ *str = *fmt;
+ ++str;
continue;
}
-
+
/* process flags */
flags = 0;
repeat:
@@ -153,11 +197,11 @@
case ' ': flags |= SPACE; goto repeat;
case '#': flags |= SPECIAL; goto repeat;
case '0': flags |= ZEROPAD; goto repeat;
- }
-
+ }
+
/* get field width */
field_width = -1;
- if (is_digit(*fmt))
+ if (isdigit(*fmt))
field_width = skip_atoi(&fmt);
else if (*fmt == '*') {
++fmt;
@@ -173,7 +217,7 @@
precision = -1;
if (*fmt == '.') {
++fmt;
- if (is_digit(*fmt))
+ if (isdigit(*fmt))
precision = skip_atoi(&fmt);
else if (*fmt == '*') {
++fmt;
@@ -186,109 +230,202 @@
/* get the conversion qualifier */
qualifier = -1;
- if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L') {
+ if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
+ *fmt =='Z' || *fmt == 'z') {
qualifier = *fmt;
++fmt;
+ if (qualifier == 'l' && *fmt == 'l') {
+ qualifier = 'L';
+ ++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 'c':
+ if (!(flags & LEFT)) {
+ while (--field_width > 0) {
+ if (str <= end)
+ *str = ' ';
+ ++str;
+ }
+ }
+ c = (unsigned char) va_arg(args, int);
+ if (str <= end)
+ *str = c;
+ ++str;
+ while (--field_width > 0) {
+ if (str <= end)
+ *str = ' ';
+ ++str;
+ }
+ continue;
- case 's':
- s = va_arg(args, char *);
- if (!s)
- s = "<NULL>";
+ case 's':
+ s = va_arg(args, char *);
+ if ((unsigned long)s < PAGE_SIZE)
+ s = "<NULL>";
#if 0
- len = strnlen(s, precision);
+ len = strnlen(s, precision);
#else
- len = mstrlen(s);
- if( precision > len )
- len = precision;
+ len = mstrlen(s);
+ if( precision > len )
+ len = precision;
#endif
+ if (!(flags & LEFT)) {
+ while (len < field_width--) {
+ if (str <= end)
+ *str = ' ';
+ ++str;
+ }
+ }
+ for (i = 0; i < len; ++i) {
+ if (str <= end)
+ *str = *s;
+ ++str; ++s;
+ }
+ while (len < field_width--) {
+ if (str <= end)
+ *str = ' ';
+ ++str;
+ }
+ continue;
- 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, end,
+ (unsigned long) va_arg(args, void *),
+ 16, field_width, precision, flags);
+ 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':
+ /* FIXME:
+ * What does C99 say about the overflow case here? */
+ if (qualifier == 'l') {
+ long * ip = va_arg(args, long *);
+ *ip = (str - buf);
+ } else if (qualifier == 'Z' || qualifier == 'z') {
+ size_t * ip = va_arg(args, size_t *);
+ *ip = (str - buf);
+ } else {
+ int * ip = va_arg(args, int *);
+ *ip = (str - buf);
+ }
+ 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 '%':
+ if (str <= end)
+ *str = '%';
+ ++str;
+ continue;
- /* integer number formats - set up the flags and "break" */
- case 'o':
- base = 8;
- break;
+ /* integer number formats - set up the flags and "break" */
+ case 'o':
+ base = 8;
+ break;
- case 'X':
- flags |= LARGE;
- case 'x':
- base = 16;
- break;
+ case 'X':
+ flags |= LARGE;
+ case 'x':
+ base = 16;
+ break;
- case 'd':
- case 'i':
- flags |= SIGN;
- case 'u':
- break;
+ case 'd':
+ case 'i':
+ flags |= SIGN;
+ case 'u':
+ break;
- default:
- if (*fmt != '%')
- *str++ = '%';
- if (*fmt)
- *str++ = *fmt;
- else
- --fmt;
- continue;
+ default:
+ if (str <= end)
+ *str = '%';
+ ++str;
+ if (*fmt) {
+ if (str <= end)
+ *str = *fmt;
+ ++str;
+ } else {
+ --fmt;
+ }
+ continue;
}
- if (qualifier == 'l')
+ if (qualifier == 'L')
+ num = va_arg(args, long long);
+ else if (qualifier == 'l') {
num = va_arg(args, unsigned long);
- else if (qualifier == 'h') {
+ if (flags & SIGN)
+ num = (signed long) num;
+ } else if (qualifier == 'Z' || qualifier == 'z') {
+ num = va_arg(args, size_t);
+ } 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 = (signed short) num;
+ } else {
num = va_arg(args, unsigned int);
- str = number(str, num, base, field_width, precision, flags);
+ if (flags & SIGN)
+ num = (signed int) num;
+ }
+ str = number(str, end, num, base,
+ field_width, precision, flags);
}
- *str = '\0';
+ if (str <= end)
+ *str = '\0';
+ else if (size > 0)
+ /* don't write out a null byte if the buf size is zero */
+ *end = '\0';
+ /* the trailing null byte doesn't count towards the total
+ * ++str;
+ */
return str-buf;
}
+/**
+ * snprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @size: The size of the buffer, including the trailing null space
+ * @fmt: The format string to use
+ * @...: Arguments for the format string
+ */
+int snprintf(char * buf, size_t size, const char *fmt, ...)
+{
+ va_list args;
+ int i;
+
+ va_start(args, fmt);
+ i=vsnprintf(buf,size,fmt,args);
+ va_end(args);
+ return i;
+}
+
+/**
+ * vsprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @fmt: The format string to use
+ * @args: Arguments for the format string
+ *
+ * Call this function if you are already dealing with a va_list.
+ * You probably want sprintf instead.
+ */
+int vsprintf(char *buf, const char *fmt, va_list args)
+{
+ return vsnprintf(buf, (~0U)>>1, fmt, args);
+}
+
+
+/**
+ * sprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @fmt: The format string to use
+ * @...: Arguments for the format string
+ */
int sprintf(char * buf, const char *fmt, ...)
{
va_list args;
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