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wdenk153d5112002-08-30 11:07:04 +00001/*
2 * linux/lib/vsprintf.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7/* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
8/*
9 * Wirzenius wrote this portably, Torvalds fucked it up :-)
Simon Glass931948a2011-10-21 18:51:33 +000010 *
11 * from hush: simple_itoa() was lifted from boa-0.93.15
wdenk153d5112002-08-30 11:07:04 +000012 */
13
wdenk153d5112002-08-30 11:07:04 +000014#include <common.h>
Rob Clark8adf37f2017-09-09 06:47:41 -040015#include <charset.h>
Heinrich Schuchardt218d3892018-01-10 18:06:08 +010016#include <efi_loader.h>
17#include <div64.h>
Alexey Brodkin2d2fa492018-06-05 17:17:57 +030018#include <hexdump.h>
Heinrich Schuchardt218d3892018-01-10 18:06:08 +010019#include <stdarg.h>
20#include <linux/ctype.h>
21#include <linux/err.h>
22#include <linux/types.h>
23#include <linux/string.h>
wdenk153d5112002-08-30 11:07:04 +000024
Dirk Behme3d8759e2009-07-22 17:51:56 +020025#define noinline __attribute__((noinline))
26
wdenk153d5112002-08-30 11:07:04 +000027/* we use this so that we can do without the ctype library */
28#define is_digit(c) ((c) >= '0' && (c) <= '9')
29
30static int skip_atoi(const char **s)
31{
Daniel Schwierzeckfc147852012-09-16 06:55:03 +000032 int i = 0;
wdenk153d5112002-08-30 11:07:04 +000033
34 while (is_digit(**s))
Daniel Schwierzeckfc147852012-09-16 06:55:03 +000035 i = i * 10 + *((*s)++) - '0';
36
wdenk153d5112002-08-30 11:07:04 +000037 return i;
38}
39
Mike Frysinger2b745dc2009-02-16 23:21:36 -050040/* Decimal conversion is by far the most typical, and is used
41 * for /proc and /sys data. This directly impacts e.g. top performance
42 * with many processes running. We optimize it for speed
43 * using code from
44 * http://www.cs.uiowa.edu/~jones/bcd/decimal.html
45 * (with permission from the author, Douglas W. Jones). */
46
47/* Formats correctly any integer in [0,99999].
48 * Outputs from one to five digits depending on input.
49 * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */
Daniel Schwierzeckfc147852012-09-16 06:55:03 +000050static char *put_dec_trunc(char *buf, unsigned q)
Mike Frysinger2b745dc2009-02-16 23:21:36 -050051{
52 unsigned d3, d2, d1, d0;
53 d1 = (q>>4) & 0xf;
54 d2 = (q>>8) & 0xf;
55 d3 = (q>>12);
56
57 d0 = 6*(d3 + d2 + d1) + (q & 0xf);
58 q = (d0 * 0xcd) >> 11;
59 d0 = d0 - 10*q;
60 *buf++ = d0 + '0'; /* least significant digit */
61 d1 = q + 9*d3 + 5*d2 + d1;
62 if (d1 != 0) {
63 q = (d1 * 0xcd) >> 11;
64 d1 = d1 - 10*q;
65 *buf++ = d1 + '0'; /* next digit */
66
67 d2 = q + 2*d2;
68 if ((d2 != 0) || (d3 != 0)) {
69 q = (d2 * 0xd) >> 7;
70 d2 = d2 - 10*q;
71 *buf++ = d2 + '0'; /* next digit */
72
73 d3 = q + 4*d3;
74 if (d3 != 0) {
75 q = (d3 * 0xcd) >> 11;
76 d3 = d3 - 10*q;
77 *buf++ = d3 + '0'; /* next digit */
78 if (q != 0)
Daniel Schwierzeckfc147852012-09-16 06:55:03 +000079 *buf++ = q + '0'; /* most sign. digit */
Mike Frysinger2b745dc2009-02-16 23:21:36 -050080 }
81 }
82 }
83 return buf;
84}
85/* Same with if's removed. Always emits five digits */
Daniel Schwierzeckfc147852012-09-16 06:55:03 +000086static char *put_dec_full(char *buf, unsigned q)
Mike Frysinger2b745dc2009-02-16 23:21:36 -050087{
88 /* BTW, if q is in [0,9999], 8-bit ints will be enough, */
89 /* but anyway, gcc produces better code with full-sized ints */
90 unsigned d3, d2, d1, d0;
91 d1 = (q>>4) & 0xf;
92 d2 = (q>>8) & 0xf;
93 d3 = (q>>12);
94
Wolfgang Denke366f152009-04-05 00:27:57 +020095 /*
96 * Possible ways to approx. divide by 10
97 * gcc -O2 replaces multiply with shifts and adds
98 * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386)
99 * (x * 0x67) >> 10: 1100111
100 * (x * 0x34) >> 9: 110100 - same
101 * (x * 0x1a) >> 8: 11010 - same
102 * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386)
103 */
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500104
105 d0 = 6*(d3 + d2 + d1) + (q & 0xf);
106 q = (d0 * 0xcd) >> 11;
107 d0 = d0 - 10*q;
108 *buf++ = d0 + '0';
109 d1 = q + 9*d3 + 5*d2 + d1;
110 q = (d1 * 0xcd) >> 11;
111 d1 = d1 - 10*q;
112 *buf++ = d1 + '0';
113
114 d2 = q + 2*d2;
115 q = (d2 * 0xd) >> 7;
116 d2 = d2 - 10*q;
117 *buf++ = d2 + '0';
118
119 d3 = q + 4*d3;
120 q = (d3 * 0xcd) >> 11; /* - shorter code */
121 /* q = (d3 * 0x67) >> 10; - would also work */
122 d3 = d3 - 10*q;
123 *buf++ = d3 + '0';
124 *buf++ = q + '0';
125 return buf;
126}
127/* No inlining helps gcc to use registers better */
Simon Glassd1c377f2014-10-15 04:38:34 -0600128static noinline char *put_dec(char *buf, uint64_t num)
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500129{
130 while (1) {
131 unsigned rem;
132 if (num < 100000)
133 return put_dec_trunc(buf, num);
134 rem = do_div(num, 100000);
135 buf = put_dec_full(buf, rem);
136 }
137}
138
wdenk153d5112002-08-30 11:07:04 +0000139#define ZEROPAD 1 /* pad with zero */
140#define SIGN 2 /* unsigned/signed long */
141#define PLUS 4 /* show plus */
142#define SPACE 8 /* space if plus */
143#define LEFT 16 /* left justified */
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500144#define SMALL 32 /* Must be 32 == 0x20 */
145#define SPECIAL 64 /* 0x */
wdenk153d5112002-08-30 11:07:04 +0000146
Sonny Raocd55bde2011-11-02 09:52:08 +0000147/*
148 * Macro to add a new character to our output string, but only if it will
149 * fit. The macro moves to the next character position in the output string.
150 */
151#define ADDCH(str, ch) do { \
152 if ((str) < end) \
153 *(str) = (ch); \
154 ++str; \
155 } while (0)
Sonny Raocd55bde2011-11-02 09:52:08 +0000156
Daniel Schwierzecka3e5c522012-09-16 06:55:04 +0000157static char *number(char *buf, char *end, u64 num,
Sonny Raocd55bde2011-11-02 09:52:08 +0000158 int base, int size, int precision, int type)
wdenk153d5112002-08-30 11:07:04 +0000159{
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500160 /* we are called with base 8, 10 or 16, only, thus don't need "G..." */
Daniel Schwierzeckfc147852012-09-16 06:55:03 +0000161 static const char digits[16] = "0123456789ABCDEF";
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500162
163 char tmp[66];
164 char sign;
165 char locase;
166 int need_pfx = ((type & SPECIAL) && base != 10);
wdenk153d5112002-08-30 11:07:04 +0000167 int i;
168
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500169 /* locase = 0 or 0x20. ORing digits or letters with 'locase'
170 * produces same digits or (maybe lowercased) letters */
171 locase = (type & SMALL);
wdenk153d5112002-08-30 11:07:04 +0000172 if (type & LEFT)
173 type &= ~ZEROPAD;
wdenk153d5112002-08-30 11:07:04 +0000174 sign = 0;
175 if (type & SIGN) {
Daniel Schwierzecka3e5c522012-09-16 06:55:04 +0000176 if ((s64) num < 0) {
wdenk153d5112002-08-30 11:07:04 +0000177 sign = '-';
Daniel Schwierzecka3e5c522012-09-16 06:55:04 +0000178 num = -(s64) num;
wdenk153d5112002-08-30 11:07:04 +0000179 size--;
180 } else if (type & PLUS) {
181 sign = '+';
182 size--;
183 } else if (type & SPACE) {
184 sign = ' ';
185 size--;
186 }
187 }
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500188 if (need_pfx) {
189 size--;
wdenk153d5112002-08-30 11:07:04 +0000190 if (base == 16)
wdenk153d5112002-08-30 11:07:04 +0000191 size--;
192 }
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500193
194 /* generate full string in tmp[], in reverse order */
wdenk153d5112002-08-30 11:07:04 +0000195 i = 0;
196 if (num == 0)
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500197 tmp[i++] = '0';
198 /* Generic code, for any base:
199 else do {
200 tmp[i++] = (digits[do_div(num,base)] | locase);
201 } while (num != 0);
202 */
203 else if (base != 10) { /* 8 or 16 */
204 int mask = base - 1;
205 int shift = 3;
Daniel Schwierzeckfc147852012-09-16 06:55:03 +0000206
207 if (base == 16)
208 shift = 4;
209
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500210 do {
Daniel Schwierzeckfc147852012-09-16 06:55:03 +0000211 tmp[i++] = (digits[((unsigned char)num) & mask]
212 | locase);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500213 num >>= shift;
214 } while (num);
215 } else { /* base 10 */
216 i = put_dec(tmp, num) - tmp;
217 }
218
219 /* printing 100 using %2d gives "100", not "00" */
wdenk153d5112002-08-30 11:07:04 +0000220 if (i > precision)
221 precision = i;
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500222 /* leading space padding */
wdenk153d5112002-08-30 11:07:04 +0000223 size -= precision;
Sonny Raocd55bde2011-11-02 09:52:08 +0000224 if (!(type & (ZEROPAD + LEFT))) {
225 while (--size >= 0)
226 ADDCH(buf, ' ');
227 }
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500228 /* sign */
wdenk153d5112002-08-30 11:07:04 +0000229 if (sign)
Sonny Raocd55bde2011-11-02 09:52:08 +0000230 ADDCH(buf, sign);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500231 /* "0x" / "0" prefix */
232 if (need_pfx) {
Sonny Raocd55bde2011-11-02 09:52:08 +0000233 ADDCH(buf, '0');
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500234 if (base == 16)
Sonny Raocd55bde2011-11-02 09:52:08 +0000235 ADDCH(buf, 'X' | locase);
wdenk153d5112002-08-30 11:07:04 +0000236 }
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500237 /* zero or space padding */
238 if (!(type & LEFT)) {
239 char c = (type & ZEROPAD) ? '0' : ' ';
Sonny Raocd55bde2011-11-02 09:52:08 +0000240
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500241 while (--size >= 0)
Sonny Raocd55bde2011-11-02 09:52:08 +0000242 ADDCH(buf, c);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500243 }
244 /* hmm even more zero padding? */
245 while (i <= --precision)
Sonny Raocd55bde2011-11-02 09:52:08 +0000246 ADDCH(buf, '0');
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500247 /* actual digits of result */
248 while (--i >= 0)
Sonny Raocd55bde2011-11-02 09:52:08 +0000249 ADDCH(buf, tmp[i]);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500250 /* trailing space padding */
251 while (--size >= 0)
Sonny Raocd55bde2011-11-02 09:52:08 +0000252 ADDCH(buf, ' ');
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500253 return buf;
wdenk153d5112002-08-30 11:07:04 +0000254}
255
Sonny Raocd55bde2011-11-02 09:52:08 +0000256static char *string(char *buf, char *end, char *s, int field_width,
257 int precision, int flags)
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500258{
259 int len, i;
wdenk153d5112002-08-30 11:07:04 +0000260
Kim Phillips75541502012-10-29 13:34:36 +0000261 if (s == NULL)
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500262 s = "<NULL>";
263
264 len = strnlen(s, precision);
265
266 if (!(flags & LEFT))
267 while (len < field_width--)
Sonny Raocd55bde2011-11-02 09:52:08 +0000268 ADDCH(buf, ' ');
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500269 for (i = 0; i < len; ++i)
Sonny Raocd55bde2011-11-02 09:52:08 +0000270 ADDCH(buf, *s++);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500271 while (len < field_width--)
Sonny Raocd55bde2011-11-02 09:52:08 +0000272 ADDCH(buf, ' ');
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500273 return buf;
274}
275
Heinrich Schuchardt5ae135f2018-08-31 21:31:25 +0200276/* U-Boot uses UTF-16 strings in the EFI context only. */
277#if CONFIG_IS_ENABLED(EFI_LOADER) && !defined(API_BUILD)
Rob Clark8adf37f2017-09-09 06:47:41 -0400278static char *string16(char *buf, char *end, u16 *s, int field_width,
279 int precision, int flags)
280{
Heinrich Schuchardt876a6362019-02-10 11:11:26 +0100281 const u16 *str = s ? s : L"<NULL>";
282 ssize_t i, len = utf16_strnlen(str, precision);
Rob Clark8adf37f2017-09-09 06:47:41 -0400283
284 if (!(flags & LEFT))
Heinrich Schuchardt795ca042018-08-31 21:31:29 +0200285 for (; len < field_width; --field_width)
Rob Clark8adf37f2017-09-09 06:47:41 -0400286 ADDCH(buf, ' ');
Heinrich Schuchardt876a6362019-02-10 11:11:26 +0100287 for (i = 0; i < len && buf + utf16_utf8_strnlen(str, 1) <= end; ++i) {
288 s32 s = utf16_get(&str);
289
Heinrich Schuchardtc6dc1f12019-02-15 22:20:53 +0100290 if (s < 0)
291 s = '?';
Heinrich Schuchardt876a6362019-02-10 11:11:26 +0100292 utf8_put(s, &buf);
293 }
Heinrich Schuchardt795ca042018-08-31 21:31:29 +0200294 for (; len < field_width; --field_width)
Rob Clark8adf37f2017-09-09 06:47:41 -0400295 ADDCH(buf, ' ');
296 return buf;
297}
Heinrich Schuchardt218d3892018-01-10 18:06:08 +0100298
Heinrich Schuchardt3db35912019-05-11 09:53:33 +0200299#if CONFIG_IS_ENABLED(EFI_DEVICE_PATH_TO_TEXT)
Heinrich Schuchardt218d3892018-01-10 18:06:08 +0100300static char *device_path_string(char *buf, char *end, void *dp, int field_width,
301 int precision, int flags)
302{
303 u16 *str;
304
Heinrich Schuchardt3b47f332018-01-26 06:30:30 +0100305 /* If dp == NULL output the string '<NULL>' */
Heinrich Schuchardt218d3892018-01-10 18:06:08 +0100306 if (!dp)
Heinrich Schuchardt3b47f332018-01-26 06:30:30 +0100307 return string16(buf, end, dp, field_width, precision, flags);
Heinrich Schuchardt218d3892018-01-10 18:06:08 +0100308
309 str = efi_dp_str((struct efi_device_path *)dp);
310 if (!str)
311 return ERR_PTR(-ENOMEM);
312
313 buf = string16(buf, end, str, field_width, precision, flags);
314 efi_free_pool(str);
315 return buf;
316}
317#endif
Heinrich Schuchardt3db35912019-05-11 09:53:33 +0200318#endif
Rob Clark8adf37f2017-09-09 06:47:41 -0400319
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500320#ifdef CONFIG_CMD_NET
Sonny Raocd55bde2011-11-02 09:52:08 +0000321static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width,
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500322 int precision, int flags)
wdenk153d5112002-08-30 11:07:04 +0000323{
Daniel Schwierzeckfc147852012-09-16 06:55:03 +0000324 /* (6 * 2 hex digits), 5 colons and trailing zero */
325 char mac_addr[6 * 3];
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500326 char *p = mac_addr;
327 int i;
328
329 for (i = 0; i < 6; i++) {
Alexey Brodkin2d2fa492018-06-05 17:17:57 +0300330 p = hex_byte_pack(p, addr[i]);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500331 if (!(flags & SPECIAL) && i != 5)
332 *p++ = ':';
333 }
334 *p = '\0';
335
Sonny Raocd55bde2011-11-02 09:52:08 +0000336 return string(buf, end, mac_addr, field_width, precision,
337 flags & ~SPECIAL);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500338}
339
Sonny Raocd55bde2011-11-02 09:52:08 +0000340static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width,
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500341 int precision, int flags)
342{
Daniel Schwierzeckfc147852012-09-16 06:55:03 +0000343 /* (8 * 4 hex digits), 7 colons and trailing zero */
344 char ip6_addr[8 * 5];
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500345 char *p = ip6_addr;
346 int i;
347
348 for (i = 0; i < 8; i++) {
Alexey Brodkin2d2fa492018-06-05 17:17:57 +0300349 p = hex_byte_pack(p, addr[2 * i]);
350 p = hex_byte_pack(p, addr[2 * i + 1]);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500351 if (!(flags & SPECIAL) && i != 7)
352 *p++ = ':';
353 }
354 *p = '\0';
355
Sonny Raocd55bde2011-11-02 09:52:08 +0000356 return string(buf, end, ip6_addr, field_width, precision,
357 flags & ~SPECIAL);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500358}
359
Sonny Raocd55bde2011-11-02 09:52:08 +0000360static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500361 int precision, int flags)
362{
Daniel Schwierzeckfc147852012-09-16 06:55:03 +0000363 /* (4 * 3 decimal digits), 3 dots and trailing zero */
364 char ip4_addr[4 * 4];
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500365 char temp[3]; /* hold each IP quad in reverse order */
366 char *p = ip4_addr;
367 int i, digits;
368
369 for (i = 0; i < 4; i++) {
370 digits = put_dec_trunc(temp, addr[i]) - temp;
371 /* reverse the digits in the quad */
372 while (digits--)
373 *p++ = temp[digits];
374 if (i != 3)
375 *p++ = '.';
376 }
377 *p = '\0';
378
Sonny Raocd55bde2011-11-02 09:52:08 +0000379 return string(buf, end, ip4_addr, field_width, precision,
380 flags & ~SPECIAL);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500381}
382#endif
383
Rob Clarkc82342f2017-09-09 06:47:42 -0400384#ifdef CONFIG_LIB_UUID
385/*
386 * This works (roughly) the same way as linux's, but we currently always
387 * print lower-case (ie. we just keep %pUB and %pUL for compat with linux),
388 * mostly just because that is what uuid_bin_to_str() supports.
389 *
390 * %pUb: 01020304-0506-0708-090a-0b0c0d0e0f10
391 * %pUl: 04030201-0605-0807-090a-0b0c0d0e0f10
392 */
393static char *uuid_string(char *buf, char *end, u8 *addr, int field_width,
394 int precision, int flags, const char *fmt)
395{
396 char uuid[UUID_STR_LEN + 1];
397 int str_format = UUID_STR_FORMAT_STD;
398
399 switch (*(++fmt)) {
400 case 'L':
401 case 'l':
402 str_format = UUID_STR_FORMAT_GUID;
403 break;
404 case 'B':
405 case 'b':
406 /* this is the default */
407 break;
408 default:
409 break;
410 }
411
Simon Glass62f32552018-06-18 08:08:20 -0600412 if (addr)
413 uuid_bin_to_str(addr, uuid, str_format);
414 else
415 strcpy(uuid, "<NULL>");
Rob Clarkc82342f2017-09-09 06:47:42 -0400416
417 return string(buf, end, uuid, field_width, precision, flags);
418}
419#endif
420
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500421/*
422 * Show a '%p' thing. A kernel extension is that the '%p' is followed
423 * by an extra set of alphanumeric characters that are extended format
424 * specifiers.
425 *
426 * Right now we handle:
427 *
428 * - 'M' For a 6-byte MAC address, it prints the address in the
429 * usual colon-separated hex notation
430 * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated
431 * decimal for v4 and colon separated network-order 16 bit hex for v6)
432 * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is
433 * currently the same
434 *
435 * Note: The difference between 'S' and 'F' is that on ia64 and ppc64
436 * function pointers are really function descriptors, which contain a
437 * pointer to the real address.
438 */
Sonny Raocd55bde2011-11-02 09:52:08 +0000439static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
440 int field_width, int precision, int flags)
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500441{
Thierry Reding3e336c82014-11-12 18:26:47 -0700442 u64 num = (uintptr_t)ptr;
443
Wolfgang Denk88a8b012012-10-30 09:19:52 +0000444 /*
445 * Being a boot loader, we explicitly allow pointers to
446 * (physical) address null.
447 */
448#if 0
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500449 if (!ptr)
Sonny Raocd55bde2011-11-02 09:52:08 +0000450 return string(buf, end, "(null)", field_width, precision,
451 flags);
Wolfgang Denk88a8b012012-10-30 09:19:52 +0000452#endif
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500453
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500454 switch (*fmt) {
Heinrich Schuchardtd2cc0a72018-08-31 21:31:23 +0200455/* Device paths only exist in the EFI context. */
Heinrich Schuchardt3db35912019-05-11 09:53:33 +0200456#if CONFIG_IS_ENABLED(EFI_DEVICE_PATH_TO_TEXT) && !defined(API_BUILD)
Heinrich Schuchardt218d3892018-01-10 18:06:08 +0100457 case 'D':
458 return device_path_string(buf, end, ptr, field_width,
459 precision, flags);
460#endif
Thierry Reding3e336c82014-11-12 18:26:47 -0700461 case 'a':
462 flags |= SPECIAL | ZEROPAD;
463
464 switch (fmt[1]) {
465 case 'p':
466 default:
467 field_width = sizeof(phys_addr_t) * 2 + 2;
468 num = *(phys_addr_t *)ptr;
469 break;
470 }
471 break;
Thierry Redingfbc32102019-03-12 11:38:00 +0100472#ifdef CONFIG_CMD_NET
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500473 case 'm':
474 flags |= SPECIAL;
475 /* Fallthrough */
476 case 'M':
Sonny Raocd55bde2011-11-02 09:52:08 +0000477 return mac_address_string(buf, end, ptr, field_width,
478 precision, flags);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500479 case 'i':
480 flags |= SPECIAL;
481 /* Fallthrough */
482 case 'I':
483 if (fmt[1] == '6')
Sonny Raocd55bde2011-11-02 09:52:08 +0000484 return ip6_addr_string(buf, end, ptr, field_width,
485 precision, flags);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500486 if (fmt[1] == '4')
Sonny Raocd55bde2011-11-02 09:52:08 +0000487 return ip4_addr_string(buf, end, ptr, field_width,
488 precision, flags);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500489 flags &= ~SPECIAL;
490 break;
wdenkf602aa02004-03-13 23:29:43 +0000491#endif
Rob Clarkc82342f2017-09-09 06:47:42 -0400492#ifdef CONFIG_LIB_UUID
493 case 'U':
494 return uuid_string(buf, end, ptr, field_width, precision,
495 flags, fmt);
496#endif
497 default:
498 break;
499 }
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500500 flags |= SMALL;
501 if (field_width == -1) {
502 field_width = 2*sizeof(void *);
503 flags |= ZEROPAD;
504 }
Thierry Reding3e336c82014-11-12 18:26:47 -0700505 return number(buf, end, num, 16, field_width, precision, flags);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500506}
507
Sonny Raocd55bde2011-11-02 09:52:08 +0000508static int vsnprintf_internal(char *buf, size_t size, const char *fmt,
509 va_list args)
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500510{
Daniel Schwierzecka3e5c522012-09-16 06:55:04 +0000511 u64 num;
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500512 int base;
513 char *str;
wdenk153d5112002-08-30 11:07:04 +0000514
515 int flags; /* flags to number() */
516
517 int field_width; /* width of output field */
518 int precision; /* min. # of digits for integers; max
519 number of chars for from string */
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500520 int qualifier; /* 'h', 'l', or 'L' for integer fields */
521 /* 'z' support added 23/7/1999 S.H. */
522 /* 'z' changed to 'Z' --davidm 1/25/99 */
523 /* 't' added for ptrdiff_t */
Sonny Raocd55bde2011-11-02 09:52:08 +0000524 char *end = buf + size;
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500525
Sonny Raocd55bde2011-11-02 09:52:08 +0000526 /* Make sure end is always >= buf - do we want this in U-Boot? */
527 if (end < buf) {
528 end = ((void *)-1);
529 size = end - buf;
530 }
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500531 str = buf;
wdenk153d5112002-08-30 11:07:04 +0000532
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500533 for (; *fmt ; ++fmt) {
wdenk153d5112002-08-30 11:07:04 +0000534 if (*fmt != '%') {
Sonny Raocd55bde2011-11-02 09:52:08 +0000535 ADDCH(str, *fmt);
wdenk153d5112002-08-30 11:07:04 +0000536 continue;
537 }
538
539 /* process flags */
540 flags = 0;
Daniel Schwierzeckfc147852012-09-16 06:55:03 +0000541repeat:
wdenk153d5112002-08-30 11:07:04 +0000542 ++fmt; /* this also skips first '%' */
543 switch (*fmt) {
Daniel Schwierzeckfc147852012-09-16 06:55:03 +0000544 case '-':
545 flags |= LEFT;
546 goto repeat;
547 case '+':
548 flags |= PLUS;
549 goto repeat;
550 case ' ':
551 flags |= SPACE;
552 goto repeat;
553 case '#':
554 flags |= SPECIAL;
555 goto repeat;
556 case '0':
557 flags |= ZEROPAD;
558 goto repeat;
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500559 }
wdenk153d5112002-08-30 11:07:04 +0000560
561 /* get field width */
562 field_width = -1;
563 if (is_digit(*fmt))
564 field_width = skip_atoi(&fmt);
565 else if (*fmt == '*') {
566 ++fmt;
567 /* it's the next argument */
568 field_width = va_arg(args, int);
569 if (field_width < 0) {
570 field_width = -field_width;
571 flags |= LEFT;
572 }
573 }
574
575 /* get the precision */
576 precision = -1;
577 if (*fmt == '.') {
578 ++fmt;
579 if (is_digit(*fmt))
580 precision = skip_atoi(&fmt);
581 else if (*fmt == '*') {
582 ++fmt;
583 /* it's the next argument */
584 precision = va_arg(args, int);
585 }
586 if (precision < 0)
587 precision = 0;
588 }
589
590 /* get the conversion qualifier */
591 qualifier = -1;
Jean-Christophe PLAGNIOL-VILLARD0f720692008-07-14 14:11:45 +0200592 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500593 *fmt == 'Z' || *fmt == 'z' || *fmt == 't') {
wdenk153d5112002-08-30 11:07:04 +0000594 qualifier = *fmt;
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500595 ++fmt;
596 if (qualifier == 'l' && *fmt == 'l') {
597 qualifier = 'L';
James Yang7fc40152008-01-10 16:02:07 -0600598 ++fmt;
599 }
wdenk153d5112002-08-30 11:07:04 +0000600 }
601
602 /* default base */
603 base = 10;
604
605 switch (*fmt) {
606 case 'c':
Sonny Raocd55bde2011-11-02 09:52:08 +0000607 if (!(flags & LEFT)) {
wdenk153d5112002-08-30 11:07:04 +0000608 while (--field_width > 0)
Sonny Raocd55bde2011-11-02 09:52:08 +0000609 ADDCH(str, ' ');
610 }
611 ADDCH(str, (unsigned char) va_arg(args, int));
wdenk153d5112002-08-30 11:07:04 +0000612 while (--field_width > 0)
Sonny Raocd55bde2011-11-02 09:52:08 +0000613 ADDCH(str, ' ');
wdenk153d5112002-08-30 11:07:04 +0000614 continue;
615
616 case 's':
Heinrich Schuchardt5ae135f2018-08-31 21:31:25 +0200617/* U-Boot uses UTF-16 strings in the EFI context only. */
618#if CONFIG_IS_ENABLED(EFI_LOADER) && !defined(API_BUILD)
619 if (qualifier == 'l') {
Rob Clark8adf37f2017-09-09 06:47:41 -0400620 str = string16(str, end, va_arg(args, u16 *),
621 field_width, precision, flags);
Heinrich Schuchardt5ae135f2018-08-31 21:31:25 +0200622 } else
623#endif
624 {
Rob Clark8adf37f2017-09-09 06:47:41 -0400625 str = string(str, end, va_arg(args, char *),
626 field_width, precision, flags);
627 }
wdenk153d5112002-08-30 11:07:04 +0000628 continue;
629
630 case 'p':
Daniel Schwierzeckfc147852012-09-16 06:55:03 +0000631 str = pointer(fmt + 1, str, end,
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500632 va_arg(args, void *),
633 field_width, precision, flags);
Heinrich Schuchardt218d3892018-01-10 18:06:08 +0100634 if (IS_ERR(str))
635 return PTR_ERR(str);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500636 /* Skip all alphanumeric pointer suffixes */
637 while (isalnum(fmt[1]))
638 fmt++;
wdenk153d5112002-08-30 11:07:04 +0000639 continue;
640
wdenk153d5112002-08-30 11:07:04 +0000641 case 'n':
642 if (qualifier == 'l') {
Daniel Schwierzeckfc147852012-09-16 06:55:03 +0000643 long *ip = va_arg(args, long *);
wdenk153d5112002-08-30 11:07:04 +0000644 *ip = (str - buf);
645 } else {
Daniel Schwierzeckfc147852012-09-16 06:55:03 +0000646 int *ip = va_arg(args, int *);
wdenk153d5112002-08-30 11:07:04 +0000647 *ip = (str - buf);
648 }
649 continue;
650
651 case '%':
Sonny Raocd55bde2011-11-02 09:52:08 +0000652 ADDCH(str, '%');
wdenk153d5112002-08-30 11:07:04 +0000653 continue;
654
655 /* integer number formats - set up the flags and "break" */
656 case 'o':
657 base = 8;
658 break;
659
wdenk153d5112002-08-30 11:07:04 +0000660 case 'x':
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500661 flags |= SMALL;
662 case 'X':
wdenk153d5112002-08-30 11:07:04 +0000663 base = 16;
664 break;
665
666 case 'd':
667 case 'i':
668 flags |= SIGN;
669 case 'u':
670 break;
671
672 default:
Sonny Raocd55bde2011-11-02 09:52:08 +0000673 ADDCH(str, '%');
wdenk153d5112002-08-30 11:07:04 +0000674 if (*fmt)
Sonny Raocd55bde2011-11-02 09:52:08 +0000675 ADDCH(str, *fmt);
wdenk153d5112002-08-30 11:07:04 +0000676 else
677 --fmt;
678 continue;
679 }
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500680 if (qualifier == 'L') /* "quad" for 64 bit variables */
wdenkf602aa02004-03-13 23:29:43 +0000681 num = va_arg(args, unsigned long long);
Heiko Schocher0f602e12009-12-03 11:21:21 +0100682 else if (qualifier == 'l') {
wdenk153d5112002-08-30 11:07:04 +0000683 num = va_arg(args, unsigned long);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500684 if (flags & SIGN)
685 num = (signed long) num;
Jean-Christophe PLAGNIOL-VILLARD0f720692008-07-14 14:11:45 +0200686 } else if (qualifier == 'Z' || qualifier == 'z') {
687 num = va_arg(args, size_t);
688 } else if (qualifier == 't') {
689 num = va_arg(args, ptrdiff_t);
690 } else if (qualifier == 'h') {
wdenk153d5112002-08-30 11:07:04 +0000691 num = (unsigned short) va_arg(args, int);
692 if (flags & SIGN)
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500693 num = (signed short) num;
694 } else {
wdenk153d5112002-08-30 11:07:04 +0000695 num = va_arg(args, unsigned int);
Mike Frysinger2b745dc2009-02-16 23:21:36 -0500696 if (flags & SIGN)
697 num = (signed int) num;
698 }
Sonny Raocd55bde2011-11-02 09:52:08 +0000699 str = number(str, end, num, base, field_width, precision,
700 flags);
701 }
702
Sonny Raocd55bde2011-11-02 09:52:08 +0000703 if (size > 0) {
704 ADDCH(str, '\0');
705 if (str > end)
706 end[-1] = '\0';
Darwin Rambo6958ede2013-12-19 15:14:19 -0800707 --str;
wdenk153d5112002-08-30 11:07:04 +0000708 }
Sonny Raocd55bde2011-11-02 09:52:08 +0000709 /* the trailing null byte doesn't count towards the total */
Daniel Schwierzeckfc147852012-09-16 06:55:03 +0000710 return str - buf;
wdenk153d5112002-08-30 11:07:04 +0000711}
712
Sonny Raocd55bde2011-11-02 09:52:08 +0000713int vsnprintf(char *buf, size_t size, const char *fmt,
714 va_list args)
715{
716 return vsnprintf_internal(buf, size, fmt, args);
717}
718
Sonny Raocd55bde2011-11-02 09:52:08 +0000719int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
720{
721 int i;
722
723 i = vsnprintf(buf, size, fmt, args);
724
725 if (likely(i < size))
726 return i;
727 if (size != 0)
728 return size - 1;
729 return 0;
730}
731
Sonny Raocd55bde2011-11-02 09:52:08 +0000732int snprintf(char *buf, size_t size, const char *fmt, ...)
733{
734 va_list args;
735 int i;
736
737 va_start(args, fmt);
738 i = vsnprintf(buf, size, fmt, args);
739 va_end(args);
740
741 return i;
742}
743
Sonny Raocd55bde2011-11-02 09:52:08 +0000744int scnprintf(char *buf, size_t size, const char *fmt, ...)
745{
746 va_list args;
747 int i;
748
749 va_start(args, fmt);
750 i = vscnprintf(buf, size, fmt, args);
751 va_end(args);
752
753 return i;
754}
Sonny Raocd55bde2011-11-02 09:52:08 +0000755
756/**
757 * Format a string and place it in a buffer (va_list version)
758 *
759 * @param buf The buffer to place the result into
760 * @param fmt The format string to use
761 * @param args Arguments for the format string
762 *
763 * The function returns the number of characters written
764 * into @buf. Use vsnprintf() or vscnprintf() in order to avoid
765 * buffer overflows.
766 *
767 * If you're not already dealing with a va_list consider using sprintf().
768 */
769int vsprintf(char *buf, const char *fmt, va_list args)
770{
771 return vsnprintf_internal(buf, INT_MAX, fmt, args);
772}
773
Daniel Schwierzeckfc147852012-09-16 06:55:03 +0000774int sprintf(char *buf, const char *fmt, ...)
wdenk153d5112002-08-30 11:07:04 +0000775{
776 va_list args;
777 int i;
778
779 va_start(args, fmt);
Daniel Schwierzeckfc147852012-09-16 06:55:03 +0000780 i = vsprintf(buf, fmt, args);
wdenk153d5112002-08-30 11:07:04 +0000781 va_end(args);
782 return i;
783}
784
Alex Kiernand07d0a02018-04-19 04:32:55 +0000785#if CONFIG_IS_ENABLED(PRINTF)
Stefan Roese363ab7b2015-11-23 07:00:22 +0100786int printf(const char *fmt, ...)
787{
788 va_list args;
789 uint i;
790 char printbuffer[CONFIG_SYS_PBSIZE];
791
792 va_start(args, fmt);
793
794 /*
795 * For this to work, printbuffer must be larger than
796 * anything we ever want to print.
797 */
798 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
799 va_end(args);
800
Heinrich Schuchardt218d3892018-01-10 18:06:08 +0100801 /* Handle error */
802 if (i <= 0)
803 return i;
Stefan Roese363ab7b2015-11-23 07:00:22 +0100804 /* Print the string */
805 puts(printbuffer);
806 return i;
807}
808
809int vprintf(const char *fmt, va_list args)
810{
811 uint i;
812 char printbuffer[CONFIG_SYS_PBSIZE];
813
814 /*
815 * For this to work, printbuffer must be larger than
816 * anything we ever want to print.
817 */
818 i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
819
Heinrich Schuchardt218d3892018-01-10 18:06:08 +0100820 /* Handle error */
821 if (i <= 0)
822 return i;
Stefan Roese363ab7b2015-11-23 07:00:22 +0100823 /* Print the string */
824 puts(printbuffer);
825 return i;
826}
Alex Kiernand07d0a02018-04-19 04:32:55 +0000827#endif
Simon Glass509dbf92015-02-27 22:06:32 -0700828
Simon Glass931948a2011-10-21 18:51:33 +0000829char *simple_itoa(ulong i)
830{
831 /* 21 digits plus null terminator, good for 64-bit or smaller ints */
832 static char local[22];
833 char *p = &local[21];
834
835 *p-- = '\0';
836 do {
837 *p-- = '0' + i % 10;
838 i /= 10;
839 } while (i > 0);
840 return p + 1;
841}
Simon Glassb09cfd82013-06-11 11:14:38 -0700842
843/* We don't seem to have %'d in U-Boot */
844void print_grouped_ull(unsigned long long int_val, int digits)
845{
846 char str[21], *s;
847 int grab = 3;
848
849 digits = (digits + 2) / 3;
850 sprintf(str, "%*llu", digits * 3, int_val);
851 for (s = str; *s; s += grab) {
852 if (s != str)
853 putc(s[-1] != ' ' ? ',' : ' ');
854 printf("%.*s", grab, s);
855 grab = 3;
856 }
857}
Heiko Schocher7e5a16c2015-04-27 07:42:05 +0200858
859bool str2off(const char *p, loff_t *num)
860{
861 char *endptr;
862
863 *num = simple_strtoull(p, &endptr, 16);
864 return *p != '\0' && *endptr == '\0';
865}
866
867bool str2long(const char *p, ulong *num)
868{
869 char *endptr;
870
871 *num = simple_strtoul(p, &endptr, 16);
872 return *p != '\0' && *endptr == '\0';
873}