include/vsprintf.h

   1 /*
   2  * (C) Copyright 2000-2009
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #ifndef __VSPRINTF_H
   9 #define __VSPRINTF_H
  10
  11 #include <stdarg.h>
  12
  13 ulong simple_strtoul(const char *cp, char **endp, unsigned int base);
  14
  15 /**
  16  * strict_strtoul - convert a string to an unsigned long strictly
  17  * @param cp    The string to be converted
  18  * @param base  The number base to use
  19  * @param res   The converted result value
  20  * @return 0 if conversion is successful and *res is set to the converted
  21  * value, otherwise it returns -EINVAL and *res is set to 0.
  22  *
  23  * strict_strtoul converts a string to an unsigned long only if the
  24  * string is really an unsigned long string, any string containing
  25  * any invalid char at the tail will be rejected and -EINVAL is returned,
  26  * only a newline char at the tail is acceptible because people generally
  27  * change a module parameter in the following way:
  28  *
  29  *      echo 1024 > /sys/module/e1000/parameters/copybreak
  30  *
  31  * echo will append a newline to the tail.
  32  *
  33  * simple_strtoul just ignores the successive invalid characters and
  34  * return the converted value of prefix part of the string.
  35  *
  36  * Copied this function from Linux 2.6.38 commit ID:
  37  * 521cb40b0c44418a4fd36dc633f575813d59a43d
  38  *
  39  */
  40 int strict_strtoul(const char *cp, unsigned int base, unsigned long *res);
  41 unsigned long long simple_strtoull(const char *cp, char **endp,
  42                                         unsigned int base);
  43 long simple_strtol(const char *cp, char **endp, unsigned int base);
  44
  45 /**
  46  * trailing_strtol() - extract a trailing integer from a string
  47  *
  48  * Given a string this finds a trailing number on the string and returns it.
  49  * For example, "abc123" would return 123.
  50  *
  51  * @str:        String to exxamine
  52  * @return training number if found, else -1
  53  */
  54 long trailing_strtol(const char *str);
  55
  56 /**
  57  * trailing_strtoln() - extract a trailing integer from a fixed-length string
  58  *
  59  * Given a fixed-length string this finds a trailing number on the string
  60  * and returns it. For example, "abc123" would return 123. Only the
  61  * characters between @str and @end - 1 are examined. If @end is NULL, it is
  62  * set to str + strlen(str).
  63  *
  64  * @str:        String to exxamine
  65  * @end:        Pointer to end of string to examine, or NULL to use the
  66  *              whole string
  67  * @return training number if found, else -1
  68  */
  69 long trailing_strtoln(const char *str, const char *end);
  70
  71 /**
  72  * panic() - Print a message and reset/hang
  73  *
  74  * Prints a message on the console(s) and then resets. If CONFIG_PANIC_HANG is
  75  * defined, then it will hang instead of resetting.
  76  *
  77  * @param fmt:  printf() format string for message, which should not include
  78  *              \n, followed by arguments
  79  */
  80 void panic(const char *fmt, ...)
  81                 __attribute__ ((format (__printf__, 1, 2), noreturn));
  82
  83 /**
  84  * panic_str() - Print a message and reset/hang
  85  *
  86  * Prints a message on the console(s) and then resets. If CONFIG_PANIC_HANG is
  87  * defined, then it will hang instead of resetting.
  88  *
  89  * This function can be used instead of panic() when your board does not
  90  * already use printf(), * to keep code size small.
  91  *
  92  * @param fmt:  string to display, which should not include \n
  93  */
  94 void panic_str(const char *str) __attribute__ ((noreturn));
  95
  96 /**
  97  * Format a string and place it in a buffer
  98  *
  99  * @param buf   The buffer to place the result into
 100  * @param fmt   The format string to use
 101  * @param ...   Arguments for the format string
 102  *
 103  * The function returns the number of characters written
 104  * into @buf.
 105  *
 106  * See the vsprintf() documentation for format string extensions over C99.
 107  */
 108 int sprintf(char *buf, const char *fmt, ...)
 109                 __attribute__ ((format (__printf__, 2, 3)));
 110
 111 /**
 112  * Format a string and place it in a buffer (va_list version)
 113  *
 114  * @param buf   The buffer to place the result into
 115  * @param size  The size of the buffer, including the trailing null space
 116  * @param fmt   The format string to use
 117  * @param args  Arguments for the format string
 118  * @return the number of characters which have been written into
 119  * the @buf not including the trailing '\0'. If @size is == 0 the function
 120  * returns 0.
 121  *
 122  * If you're not already dealing with a va_list consider using scnprintf().
 123  *
 124  * See the vsprintf() documentation for format string extensions over C99.
 125  */
 126 int vsprintf(char *buf, const char *fmt, va_list args);
 127 char *simple_itoa(ulong i);
 128
 129 /**
 130  * Format a string and place it in a buffer
 131  *
 132  * @param buf   The buffer to place the result into
 133  * @param size  The size of the buffer, including the trailing null space
 134  * @param fmt   The format string to use
 135  * @param ...   Arguments for the format string
 136  * @return the number of characters which would be
 137  * generated for the given input, excluding the trailing null,
 138  * as per ISO C99.  If the return is greater than or equal to
 139  * @size, the resulting string is truncated.
 140  *
 141  * See the vsprintf() documentation for format string extensions over C99.
 142  */
 143 int snprintf(char *buf, size_t size, const char *fmt, ...)
 144                 __attribute__ ((format (__printf__, 3, 4)));
 145
 146 /**
 147  * Format a string and place it in a buffer
 148  *
 149  * @param buf   The buffer to place the result into
 150  * @param size  The size of the buffer, including the trailing null space
 151  * @param fmt   The format string to use
 152  * @param ...   Arguments for the format string
 153  *
 154  * The return value is the number of characters written into @buf not including
 155  * the trailing '\0'. If @size is == 0 the function returns 0.
 156  *
 157  * See the vsprintf() documentation for format string extensions over C99.
 158  */
 159 int scnprintf(char *buf, size_t size, const char *fmt, ...)
 160                 __attribute__ ((format (__printf__, 3, 4)));
 161
 162 /**
 163  * Format a string and place it in a buffer (base function)
 164  *
 165  * @param buf   The buffer to place the result into
 166  * @param size  The size of the buffer, including the trailing null space
 167  * @param fmt   The format string to use
 168  * @param args  Arguments for the format string
 169  * @return The number characters which would be generated for the given
 170  * input, excluding the trailing '\0', as per ISO C99. Note that fewer
 171  * characters may be written if this number of characters is >= size.
 172  *
 173  * This function follows C99 vsnprintf, but has some extensions:
 174  * %pS output the name of a text symbol
 175  * %pF output the name of a function pointer
 176  * %pR output the address range in a struct resource
 177  *
 178  * The function returns the number of characters which would be
 179  * generated for the given input, excluding the trailing '\0',
 180  * as per ISO C99.
 181  *
 182  * Call this function if you are already dealing with a va_list.
 183  * You probably want snprintf() instead.
 184  */
 185 int vsnprintf(char *buf, size_t size, const char *fmt, va_list args);
 186
 187 /**
 188  * Format a string and place it in a buffer (va_list version)
 189  *
 190  * @param buf   The buffer to place the result into
 191  * @param size  The size of the buffer, including the trailing null space
 192  * @param fmt   The format string to use
 193  * @param args  Arguments for the format string
 194  * @return the number of characters which have been written into
 195  * the @buf not including the trailing '\0'. If @size is == 0 the function
 196  * returns 0.
 197  *
 198  * If you're not already dealing with a va_list consider using scnprintf().
 199  *
 200  * See the vsprintf() documentation for format string extensions over C99.
 201  */
 202 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
 203
 204 /**
 205  * print_grouped_ull() - print a value with digits grouped by ','
 206  *
 207  * This prints a value with grouped digits, like 12,345,678 to make it easier
 208  * to read.
 209  *
 210  * @val:        Value to print
 211  * @digits:     Number of digiits to print
 212  */
 213 void print_grouped_ull(unsigned long long int_val, int digits);
 214
 215 bool str2off(const char *p, loff_t *num);
 216 bool str2long(const char *p, ulong *num);
 217 #endif