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