summaryrefslogtreecommitdiff
path: root/include/vsprintf.h
blob: e006af200fd0b88791ba3266fb575b4605c5dd73 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * (C) Copyright 2000-2009
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 */

#ifndef __VSPRINTF_H
#define __VSPRINTF_H

#include <stdarg.h>
#include <linux/types.h>

/**
 * simple_strtoul - convert a string to an unsigned long
 *
 * @cp: The string to be converted
 * @endp: Updated to point to the first character not converted
 * @base: The number base to use (0 for the default)
 * Return: value decoded from string (0 if invalid)
 *
 * Converts a string to an unsigned long. If there are invalid characters at
 * the end these are ignored. In the worst case, if all characters are invalid,
 * 0 is returned
 *
 * A hex prefix is supported (e.g. 0x123) regardless of the value of @base.
 * If found, the base is set to hex (16).
 *
 * If @base is 0:
 *    - an octal '0' prefix (e.g. 0777) sets the base to octal (8).
 *    - otherwise the base defaults to decimal (10).
 */
ulong simple_strtoul(const char *cp, char **endp, unsigned int base);

/**
 * hex_strtoul - convert a string in hex to an unsigned long
 *
 * @cp: The string to be converted
 * @endp: Updated to point to the first character not converted
 * Return: value decoded from string (0 if invalid)
 *
 * Converts a hex string to an unsigned long. If there are invalid characters at
 * the end these are ignored. In the worst case, if all characters are invalid,
 * 0 is returned
 */
unsigned long hextoul(const char *cp, char **endp);

/**
 * dec_strtoul - convert a string in decimal to an unsigned long
 *
 * @cp: The string to be converted
 * @endp: Updated to point to the first character not converted
 * Return: value decoded from string (0 if invalid)
 *
 * Converts a decimal string to an unsigned long. If there are invalid
 * characters at the end these are ignored. In the worst case, if all characters
 * are invalid, 0 is returned
 */
unsigned long dectoul(const char *cp, char **endp);

/**
 * strict_strtoul - convert a string to an unsigned long strictly
 * @cp: The string to be converted
 * @base: The number base to use (0 for the default)
 * @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.
 *
 * A hex prefix is supported (e.g. 0x123) regardless of the value of @base.
 * If found, the base is set to hex (16).
 *
 * If @base is 0:
 *    - an octal '0' prefix (e.g. 0777) sets the base to octal (8).
 *    - otherwise the base defaults to decimal (10).
 *
 * 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);
long long simple_strtoll(const char *cp, char **endp, unsigned int base);

/**
 * trailing_strtol() - extract a trailing integer from a string
 *
 * Given a string this finds a trailing number on the string and returns it.
 * For example, "abc123" would return 123.
 *
 * Note that this does not handle a string without a prefix. See dectoul() for
 * that case.
 *
 * @str:	String to examine
 * Return: trailing number if found, else -1
 */
long trailing_strtol(const char *str);

/**
 * trailing_strtoln() - extract a trailing integer from a fixed-length string
 *
 * Given a fixed-length string this finds a trailing number on the string
 * and returns it. For example, "abc123" would return 123. Only the
 * characters between @str and @end - 1 are examined. If @end is NULL, it is
 * set to str + strlen(str).
 *
 * @str:	String to examine
 * @end:	Pointer to end of string to examine, or NULL to use the
 *		whole string
 * Return: trailing number if found, else -1
 */
long trailing_strtoln(const char *str, const char *end);

/**
 * trailing_strtoln_end() - extract trailing integer from a fixed-length string
 *
 * Given a fixed-length string this finds a trailing number on the string
 * and returns it. For example, "abc123" would return 123. Only the
 * characters between @str and @end - 1 are examined. If @end is NULL, it is
 * set to str + strlen(str).
 *
 * @str:	String to examine
 * @end:	Pointer to end of string to examine, or NULL to use the
 *		whole string
 * @endp:	If non-NULL, this is set to point to the character where the
 *	number starts, e.g. for "mmc0" this would be point to the '0'; if no
 *	trailing number is found, it is set to the end of the string
 * Return: training number if found, else -1
 */
long trailing_strtoln_end(const char *str, const char *end, char const **endp);

/**
 * panic() - Print a message and reset/hang
 *
 * Prints a message on the console(s) and then resets. If CONFIG_PANIC_HANG is
 * defined, then it will hang instead of resetting.
 *
 * @fmt: printf() format string for message, which should not include
 *		\n, followed by arguments
 */
void panic(const char *fmt, ...)
		__attribute__ ((format (__printf__, 1, 2), noreturn));

/**
 * panic_str() - Print a message and reset/hang
 *
 * Prints a message on the console(s) and then resets. If CONFIG_PANIC_HANG is
 * defined, then it will hang instead of resetting.
 *
 * This function can be used instead of panic() when your board does not
 * already use printf(), * to keep code size small.
 *
 * @str: string to display, which should not include \n
 */
void panic_str(const char *str) __attribute__ ((noreturn));

/**
 * 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
 *
 * 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)
 *
 * @buf: The buffer to place the result into
 * @fmt: The format string to use
 * @args: Arguments for the format string
 * Return: the number of characters which have been written into
 * the @buf not including the trailing '\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);

/**
 * simple_itoa() - convert an unsigned integer to a string
 *
 * This returns a static string containing the decimal representation of the
 * given value. The returned value may be overwritten by other calls to other
 * simple... functions, so should be used immediately
 *
 * @val: Value to convert
 * Return: string containing the decimal representation of @val
 */
char *simple_itoa(ulong val);

/**
 * simple_xtoa() - convert an unsigned integer to a hex string
 *
 * This returns a static string containing the hexadecimal representation of the
 * given value. The returned value may be overwritten by other calls to other
 * simple... functions, so should be used immediately
 *
 * @num: Value to convert
 * Return: string containing the hexecimal representation of @val
 */
char *simple_xtoa(ulong num);

/**
 * 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
 * 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
 *
 * @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
 *
 * 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)
 *
 * @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
 * 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)
 *
 * @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
 * 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);

/**
 * print_grouped_ull() - print a value with digits grouped by ','
 *
 * This prints a value with grouped digits, like 12,345,678 to make it easier
 * to read.
 *
 * @int_val: Value to print
 * @digits: Number of digiits to print
 */
void print_grouped_ull(unsigned long long int_val, int digits);

bool str2off(const char *p, loff_t *num);
bool str2long(const char *p, ulong *num);

/**
 * strmhz() - Convert a value to a Hz string
 *
 * This creates a string indicating the number of MHz of a value. For example,
 * 2700000 produces "2.7".
 * @buf: Buffer to hold output string, which must be large enough
 * @hz: Value to convert
 */
char *strmhz(char *buf, unsigned long hz);

/**
 * str_to_upper() - Convert a string to upper case
 *
 * This simply uses toupper() on each character of the string.
 *
 * @in: String to convert (must be large enough to hold the output string)
 * @out: Buffer to put converted string
 * @len: Number of bytes available in @out (SIZE_MAX for all)
 */
void str_to_upper(const char *in, char *out, size_t len);

/**
 * vsscanf - Unformat a buffer into a list of arguments
 * @inp: input buffer
 * @fmt0: format of buffer
 * @ap: arguments
 */
int vsscanf(const char *inp, char const *fmt0, va_list ap);

/**
 * sscanf - Unformat a buffer into a list of arguments
 * @buf:	input buffer
 * @fmt:	formatting of buffer
 * @...:	resulting arguments
 */
int sscanf(const char *buf, const char *fmt, ...);

#endif