include/vsprintf.h

/*
 * (C) Copyright 2000-2009
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#ifndef __VSPRINTF_H
#define __VSPRINTF_H

ulong simple_strtoul(const char *cp, char **endp, unsigned int base);

/**
 * strict_strtoul - convert a string to an unsigned long strictly
 * @param cp	The string to be converted
 * @param base	The number base to use
 * @param res	The converted result value
 * @return 0 if conversion is successful and *res is set to the converted
 * value, otherwise it returns -EINVAL and *res is set to 0.
 *
 * strict_strtoul converts a string to an unsigned long only if the
 * string is really an unsigned long string, any string containing
 * any invalid char at the tail will be rejected and -EINVAL is returned,
 * only a newline char at the tail is acceptible because people generally
 * change a module parameter in the following way:
 *
 *      echo 1024 > /sys/module/e1000/parameters/copybreak
 *
 * echo will append a newline to the tail.
 *
 * simple_strtoul just ignores the successive invalid characters and
 * return the converted value of prefix part of the string.
 *
 * Copied this function from Linux 2.6.38 commit ID:
 * 521cb40b0c44418a4fd36dc633f575813d59a43d
 *
 */
int strict_strtoul(const char *cp, unsigned int base, unsigned long *res);
unsigned long long simple_strtoull(const char *cp, char **endp,
					unsigned int base);
long simple_strtol(const char *cp, char **endp, unsigned int base);
void panic(const char *fmt, ...)
		__attribute__ ((format (__printf__, 1, 2), noreturn));

/**
 * Format a string and place it in a buffer
 *
 * @param buf	The buffer to place the result into
 * @param fmt	The format string to use
 * @param ...	Arguments for the format string
 *
 * The function returns the number of characters written
 * into @buf.
 *
 * See the vsprintf() documentation for format string extensions over C99.
 */
int sprintf(char *buf, const char *fmt, ...)
		__attribute__ ((format (__printf__, 2, 3)));

/**
 * Format a string and place it in a buffer (va_list version)
 *
 * @param buf	The buffer to place the result into
 * @param size	The size of the buffer, including the trailing null space
 * @param fmt	The format string to use
 * @param args	Arguments for the format string
 * @return the number of characters which have been written into
 * the @buf not including the trailing '\0'. If @size is == 0 the function
 * returns 0.
 *
 * If you're not already dealing with a va_list consider using scnprintf().
 *
 * See the vsprintf() documentation for format string extensions over C99.
 */
int vsprintf(char *buf, const char *fmt, va_list args);
char *simple_itoa(ulong i);

#ifdef CONFIG_SYS_VSNPRINTF
/**
 * Format a string and place it in a buffer
 *
 * @param buf	The buffer to place the result into
 * @param size	The size of the buffer, including the trailing null space
 * @param fmt	The format string to use
 * @param ...	Arguments for the format string
 * @return the number of characters which would be
 * generated for the given input, excluding the trailing null,
 * as per ISO C99.  If the return is greater than or equal to
 * @size, the resulting string is truncated.
 *
 * See the vsprintf() documentation for format string extensions over C99.
 */
int snprintf(char *buf, size_t size, const char *fmt, ...)
		__attribute__ ((format (__printf__, 3, 4)));

/**
 * Format a string and place it in a buffer
 *
 * @param buf	The buffer to place the result into
 * @param size	The size of the buffer, including the trailing null space
 * @param fmt	The format string to use
 * @param ...	Arguments for the format string
 *
 * The return value is the number of characters written into @buf not including
 * the trailing '\0'. If @size is == 0 the function returns 0.
 *
 * See the vsprintf() documentation for format string extensions over C99.
 */
int scnprintf(char *buf, size_t size, const char *fmt, ...)
		__attribute__ ((format (__printf__, 3, 4)));

/**
 * Format a string and place it in a buffer (base function)
 *
 * @param buf	The buffer to place the result into
 * @param size	The size of the buffer, including the trailing null space
 * @param fmt	The format string to use
 * @param args	Arguments for the format string
 * @return The number characters which would be generated for the given
 * input, excluding the trailing '\0', as per ISO C99. Note that fewer
 * characters may be written if this number of characters is >= size.
 *
 * This function follows C99 vsnprintf, but has some extensions:
 * %pS output the name of a text symbol
 * %pF output the name of a function pointer
 * %pR output the address range in a struct resource
 *
 * The function returns the number of characters which would be
 * generated for the given input, excluding the trailing '\0',
 * as per ISO C99.
 *
 * 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);

/**
 * Format a string and place it in a buffer (va_list version)
 *
 * @param buf	The buffer to place the result into
 * @param size	The size of the buffer, including the trailing null space
 * @param fmt	The format string to use
 * @param args	Arguments for the format string
 * @return the number of characters which have been written into
 * the @buf not including the trailing '\0'. If @size is == 0 the function
 * returns 0.
 *
 * If you're not already dealing with a va_list consider using scnprintf().
 *
 * See the vsprintf() documentation for format string extensions over C99.
 */
int vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
#else
/*
 * Use macros to silently drop the size parameter. Note that the 'cn'
 * versions are the same as the 'n' versions since the functions assume
 * there is always enough buffer space when !CONFIG_SYS_VSNPRINTF
 */
#define snprintf(buf, size, fmt, args...) sprintf(buf, fmt, ##args)
#define scnprintf(buf, size, fmt, args...) sprintf(buf, fmt, ##args)
#define vsnprintf(buf, size, fmt, args...) vsprintf(buf, fmt, ##args)
#define vscnprintf(buf, size, fmt, args...) vsprintf(buf, fmt, ##args)
#endif /* CONFIG_SYS_VSNPRINTF */

#endif