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Commit | Line | Data |
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153d511e WD |
1 | /* |
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 :-) | |
3cce8a54 SG |
10 | * |
11 | * from hush: simple_itoa() was lifted from boa-0.93.15 | |
153d511e WD |
12 | */ |
13 | ||
153d511e | 14 | #include <common.h> |
274325c5 | 15 | #include <charset.h> |
256060e4 HS |
16 | #include <efi_loader.h> |
17 | #include <div64.h> | |
f8c987f8 | 18 | #include <hexdump.h> |
256060e4 HS |
19 | #include <stdarg.h> |
20 | #include <linux/ctype.h> | |
21 | #include <linux/err.h> | |
22 | #include <linux/types.h> | |
23 | #include <linux/string.h> | |
153d511e | 24 | |
47910506 DB |
25 | #define noinline __attribute__((noinline)) |
26 | ||
153d511e WD |
27 | /* we use this so that we can do without the ctype library */ |
28 | #define is_digit(c) ((c) >= '0' && (c) <= '9') | |
29 | ||
30 | static int skip_atoi(const char **s) | |
31 | { | |
8acdae68 | 32 | int i = 0; |
153d511e WD |
33 | |
34 | while (is_digit(**s)) | |
8acdae68 DS |
35 | i = i * 10 + *((*s)++) - '0'; |
36 | ||
153d511e WD |
37 | return i; |
38 | } | |
39 | ||
6c6166f5 MF |
40 | /* 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. */ | |
8acdae68 | 50 | static char *put_dec_trunc(char *buf, unsigned q) |
6c6166f5 MF |
51 | { |
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) | |
8acdae68 | 79 | *buf++ = q + '0'; /* most sign. digit */ |
6c6166f5 MF |
80 | } |
81 | } | |
82 | } | |
83 | return buf; | |
84 | } | |
85 | /* Same with if's removed. Always emits five digits */ | |
8acdae68 | 86 | static char *put_dec_full(char *buf, unsigned q) |
6c6166f5 MF |
87 | { |
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 | ||
c0a14aed WD |
95 | /* |
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 | */ | |
6c6166f5 MF |
104 | |
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 */ | |
6bf67259 | 128 | static noinline char *put_dec(char *buf, uint64_t num) |
6c6166f5 MF |
129 | { |
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 | ||
153d511e WD |
139 | #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 */ | |
6c6166f5 MF |
144 | #define SMALL 32 /* Must be 32 == 0x20 */ |
145 | #define SPECIAL 64 /* 0x */ | |
153d511e | 146 | |
046a37bd SR |
147 | /* |
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) | |
046a37bd | 156 | |
7b64f66c | 157 | static char *number(char *buf, char *end, u64 num, |
046a37bd | 158 | int base, int size, int precision, int type) |
153d511e | 159 | { |
6c6166f5 | 160 | /* we are called with base 8, 10 or 16, only, thus don't need "G..." */ |
8acdae68 | 161 | static const char digits[16] = "0123456789ABCDEF"; |
6c6166f5 MF |
162 | |
163 | char tmp[66]; | |
164 | char sign; | |
165 | char locase; | |
166 | int need_pfx = ((type & SPECIAL) && base != 10); | |
153d511e WD |
167 | int i; |
168 | ||
6c6166f5 MF |
169 | /* locase = 0 or 0x20. ORing digits or letters with 'locase' |
170 | * produces same digits or (maybe lowercased) letters */ | |
171 | locase = (type & SMALL); | |
153d511e WD |
172 | if (type & LEFT) |
173 | type &= ~ZEROPAD; | |
153d511e WD |
174 | sign = 0; |
175 | if (type & SIGN) { | |
7b64f66c | 176 | if ((s64) num < 0) { |
153d511e | 177 | sign = '-'; |
7b64f66c | 178 | num = -(s64) num; |
153d511e WD |
179 | size--; |
180 | } else if (type & PLUS) { | |
181 | sign = '+'; | |
182 | size--; | |
183 | } else if (type & SPACE) { | |
184 | sign = ' '; | |
185 | size--; | |
186 | } | |
187 | } | |
6c6166f5 MF |
188 | if (need_pfx) { |
189 | size--; | |
153d511e | 190 | if (base == 16) |
153d511e WD |
191 | size--; |
192 | } | |
6c6166f5 MF |
193 | |
194 | /* generate full string in tmp[], in reverse order */ | |
153d511e WD |
195 | i = 0; |
196 | if (num == 0) | |
6c6166f5 MF |
197 | 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; | |
8acdae68 DS |
206 | |
207 | if (base == 16) | |
208 | shift = 4; | |
209 | ||
6c6166f5 | 210 | do { |
8acdae68 DS |
211 | tmp[i++] = (digits[((unsigned char)num) & mask] |
212 | | locase); | |
6c6166f5 MF |
213 | 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" */ | |
153d511e WD |
220 | if (i > precision) |
221 | precision = i; | |
6c6166f5 | 222 | /* leading space padding */ |
153d511e | 223 | size -= precision; |
046a37bd SR |
224 | if (!(type & (ZEROPAD + LEFT))) { |
225 | while (--size >= 0) | |
226 | ADDCH(buf, ' '); | |
227 | } | |
6c6166f5 | 228 | /* sign */ |
153d511e | 229 | if (sign) |
046a37bd | 230 | ADDCH(buf, sign); |
6c6166f5 MF |
231 | /* "0x" / "0" prefix */ |
232 | if (need_pfx) { | |
046a37bd | 233 | ADDCH(buf, '0'); |
6c6166f5 | 234 | if (base == 16) |
046a37bd | 235 | ADDCH(buf, 'X' | locase); |
6c6166f5 MF |
236 | } |
237 | /* zero or space padding */ | |
238 | if (!(type & LEFT)) { | |
239 | char c = (type & ZEROPAD) ? '0' : ' '; | |
046a37bd | 240 | |
6c6166f5 | 241 | while (--size >= 0) |
046a37bd | 242 | ADDCH(buf, c); |
153d511e | 243 | } |
6c6166f5 MF |
244 | /* hmm even more zero padding? */ |
245 | while (i <= --precision) | |
046a37bd | 246 | ADDCH(buf, '0'); |
6c6166f5 MF |
247 | /* actual digits of result */ |
248 | while (--i >= 0) | |
046a37bd | 249 | ADDCH(buf, tmp[i]); |
6c6166f5 MF |
250 | /* trailing space padding */ |
251 | while (--size >= 0) | |
046a37bd | 252 | ADDCH(buf, ' '); |
6c6166f5 | 253 | return buf; |
153d511e WD |
254 | } |
255 | ||
046a37bd SR |
256 | static char *string(char *buf, char *end, char *s, int field_width, |
257 | int precision, int flags) | |
6c6166f5 MF |
258 | { |
259 | int len, i; | |
153d511e | 260 | |
0eb25768 | 261 | if (s == NULL) |
6c6166f5 MF |
262 | s = "<NULL>"; |
263 | ||
264 | len = strnlen(s, precision); | |
265 | ||
266 | if (!(flags & LEFT)) | |
267 | while (len < field_width--) | |
046a37bd | 268 | ADDCH(buf, ' '); |
6c6166f5 | 269 | for (i = 0; i < len; ++i) |
046a37bd | 270 | ADDCH(buf, *s++); |
6c6166f5 | 271 | while (len < field_width--) |
046a37bd | 272 | ADDCH(buf, ' '); |
6c6166f5 MF |
273 | return buf; |
274 | } | |
275 | ||
fbb3ea80 HS |
276 | /* U-Boot uses UTF-16 strings in the EFI context only. */ |
277 | #if CONFIG_IS_ENABLED(EFI_LOADER) && !defined(API_BUILD) | |
274325c5 RC |
278 | static char *string16(char *buf, char *end, u16 *s, int field_width, |
279 | int precision, int flags) | |
280 | { | |
0e66c10a HS |
281 | const u16 *str = s ? s : L"<NULL>"; |
282 | ssize_t i, len = utf16_strnlen(str, precision); | |
274325c5 RC |
283 | |
284 | if (!(flags & LEFT)) | |
31bd711c | 285 | for (; len < field_width; --field_width) |
274325c5 | 286 | ADDCH(buf, ' '); |
0e66c10a HS |
287 | for (i = 0; i < len && buf + utf16_utf8_strnlen(str, 1) <= end; ++i) { |
288 | s32 s = utf16_get(&str); | |
289 | ||
60c4454d HS |
290 | if (s < 0) |
291 | s = '?'; | |
0e66c10a HS |
292 | utf8_put(s, &buf); |
293 | } | |
31bd711c | 294 | for (; len < field_width; --field_width) |
274325c5 RC |
295 | ADDCH(buf, ' '); |
296 | return buf; | |
297 | } | |
298 | ||
64b5ba4d | 299 | #if CONFIG_IS_ENABLED(EFI_DEVICE_PATH_TO_TEXT) |
256060e4 HS |
300 | static char *device_path_string(char *buf, char *end, void *dp, int field_width, |
301 | int precision, int flags) | |
302 | { | |
303 | u16 *str; | |
304 | ||
5f1ce1d4 | 305 | /* If dp == NULL output the string '<NULL>' */ |
256060e4 | 306 | if (!dp) |
5f1ce1d4 | 307 | return string16(buf, end, dp, field_width, precision, flags); |
256060e4 HS |
308 | |
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 | |
64b5ba4d | 318 | #endif |
256060e4 | 319 | |
6c6166f5 | 320 | #ifdef CONFIG_CMD_NET |
046a37bd | 321 | static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width, |
6c6166f5 | 322 | int precision, int flags) |
153d511e | 323 | { |
8acdae68 DS |
324 | /* (6 * 2 hex digits), 5 colons and trailing zero */ |
325 | char mac_addr[6 * 3]; | |
6c6166f5 MF |
326 | char *p = mac_addr; |
327 | int i; | |
328 | ||
329 | for (i = 0; i < 6; i++) { | |
f8c987f8 | 330 | p = hex_byte_pack(p, addr[i]); |
6c6166f5 MF |
331 | if (!(flags & SPECIAL) && i != 5) |
332 | *p++ = ':'; | |
333 | } | |
334 | *p = '\0'; | |
335 | ||
046a37bd SR |
336 | return string(buf, end, mac_addr, field_width, precision, |
337 | flags & ~SPECIAL); | |
6c6166f5 MF |
338 | } |
339 | ||
046a37bd | 340 | static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width, |
6c6166f5 MF |
341 | int precision, int flags) |
342 | { | |
8acdae68 DS |
343 | /* (8 * 4 hex digits), 7 colons and trailing zero */ |
344 | char ip6_addr[8 * 5]; | |
6c6166f5 MF |
345 | char *p = ip6_addr; |
346 | int i; | |
347 | ||
348 | for (i = 0; i < 8; i++) { | |
f8c987f8 AB |
349 | p = hex_byte_pack(p, addr[2 * i]); |
350 | p = hex_byte_pack(p, addr[2 * i + 1]); | |
6c6166f5 MF |
351 | if (!(flags & SPECIAL) && i != 7) |
352 | *p++ = ':'; | |
353 | } | |
354 | *p = '\0'; | |
355 | ||
046a37bd SR |
356 | return string(buf, end, ip6_addr, field_width, precision, |
357 | flags & ~SPECIAL); | |
6c6166f5 MF |
358 | } |
359 | ||
046a37bd | 360 | static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width, |
6c6166f5 MF |
361 | int precision, int flags) |
362 | { | |
8acdae68 DS |
363 | /* (4 * 3 decimal digits), 3 dots and trailing zero */ |
364 | char ip4_addr[4 * 4]; | |
6c6166f5 MF |
365 | 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 | ||
046a37bd SR |
379 | return string(buf, end, ip4_addr, field_width, precision, |
380 | flags & ~SPECIAL); | |
6c6166f5 | 381 | } |
c40b2956 | 382 | #endif |
6c6166f5 | 383 | |
22ada0c8 RC |
384 | #ifdef CONFIG_LIB_UUID |
385 | /* | |
3bad256f | 386 | * This works (roughly) the same way as Linux's. |
22ada0c8 RC |
387 | * |
388 | * %pUb: 01020304-0506-0708-090a-0b0c0d0e0f10 | |
3bad256f | 389 | * %pUB: 01020304-0506-0708-090A-0B0C0D0E0F10 |
22ada0c8 | 390 | * %pUl: 04030201-0605-0807-090a-0b0c0d0e0f10 |
3bad256f | 391 | * %pUL: 04030201-0605-0807-090A-0B0C0D0E0F10 |
22ada0c8 RC |
392 | */ |
393 | static 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]; | |
3bad256f | 397 | int str_format; |
22ada0c8 RC |
398 | |
399 | switch (*(++fmt)) { | |
400 | case 'L': | |
3bad256f HS |
401 | str_format = UUID_STR_FORMAT_GUID | UUID_STR_UPPER_CASE; |
402 | break; | |
22ada0c8 RC |
403 | case 'l': |
404 | str_format = UUID_STR_FORMAT_GUID; | |
405 | break; | |
406 | case 'B': | |
3bad256f | 407 | str_format = UUID_STR_FORMAT_STD | UUID_STR_UPPER_CASE; |
22ada0c8 RC |
408 | break; |
409 | default: | |
3bad256f | 410 | str_format = UUID_STR_FORMAT_STD; |
22ada0c8 RC |
411 | break; |
412 | } | |
413 | ||
d7ae1609 SG |
414 | if (addr) |
415 | uuid_bin_to_str(addr, uuid, str_format); | |
416 | else | |
417 | strcpy(uuid, "<NULL>"); | |
22ada0c8 RC |
418 | |
419 | return string(buf, end, uuid, field_width, precision, flags); | |
420 | } | |
421 | #endif | |
422 | ||
6c6166f5 MF |
423 | /* |
424 | * Show a '%p' thing. A kernel extension is that the '%p' is followed | |
425 | * by an extra set of alphanumeric characters that are extended format | |
426 | * specifiers. | |
427 | * | |
428 | * Right now we handle: | |
429 | * | |
430 | * - 'M' For a 6-byte MAC address, it prints the address in the | |
431 | * usual colon-separated hex notation | |
432 | * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated | |
433 | * decimal for v4 and colon separated network-order 16 bit hex for v6) | |
434 | * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is | |
435 | * currently the same | |
436 | * | |
437 | * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 | |
438 | * function pointers are really function descriptors, which contain a | |
439 | * pointer to the real address. | |
440 | */ | |
046a37bd SR |
441 | static char *pointer(const char *fmt, char *buf, char *end, void *ptr, |
442 | int field_width, int precision, int flags) | |
6c6166f5 | 443 | { |
1eebd14b TR |
444 | u64 num = (uintptr_t)ptr; |
445 | ||
d266f669 WD |
446 | /* |
447 | * Being a boot loader, we explicitly allow pointers to | |
448 | * (physical) address null. | |
449 | */ | |
450 | #if 0 | |
6c6166f5 | 451 | if (!ptr) |
046a37bd SR |
452 | return string(buf, end, "(null)", field_width, precision, |
453 | flags); | |
d266f669 | 454 | #endif |
6c6166f5 | 455 | |
6c6166f5 | 456 | switch (*fmt) { |
4ddcc4e5 | 457 | /* Device paths only exist in the EFI context. */ |
64b5ba4d | 458 | #if CONFIG_IS_ENABLED(EFI_DEVICE_PATH_TO_TEXT) && !defined(API_BUILD) |
256060e4 HS |
459 | case 'D': |
460 | return device_path_string(buf, end, ptr, field_width, | |
461 | precision, flags); | |
462 | #endif | |
1eebd14b TR |
463 | case 'a': |
464 | flags |= SPECIAL | ZEROPAD; | |
465 | ||
466 | switch (fmt[1]) { | |
467 | case 'p': | |
468 | default: | |
469 | field_width = sizeof(phys_addr_t) * 2 + 2; | |
470 | num = *(phys_addr_t *)ptr; | |
471 | break; | |
472 | } | |
473 | break; | |
17018927 | 474 | #ifdef CONFIG_CMD_NET |
6c6166f5 MF |
475 | case 'm': |
476 | flags |= SPECIAL; | |
477 | /* Fallthrough */ | |
478 | case 'M': | |
046a37bd SR |
479 | return mac_address_string(buf, end, ptr, field_width, |
480 | precision, flags); | |
6c6166f5 MF |
481 | case 'i': |
482 | flags |= SPECIAL; | |
483 | /* Fallthrough */ | |
484 | case 'I': | |
485 | if (fmt[1] == '6') | |
046a37bd SR |
486 | return ip6_addr_string(buf, end, ptr, field_width, |
487 | precision, flags); | |
6c6166f5 | 488 | if (fmt[1] == '4') |
046a37bd SR |
489 | return ip4_addr_string(buf, end, ptr, field_width, |
490 | precision, flags); | |
6c6166f5 MF |
491 | flags &= ~SPECIAL; |
492 | break; | |
6c6166f5 | 493 | #endif |
22ada0c8 RC |
494 | #ifdef CONFIG_LIB_UUID |
495 | case 'U': | |
496 | return uuid_string(buf, end, ptr, field_width, precision, | |
497 | flags, fmt); | |
498 | #endif | |
499 | default: | |
500 | break; | |
501 | } | |
6c6166f5 MF |
502 | flags |= SMALL; |
503 | if (field_width == -1) { | |
504 | field_width = 2*sizeof(void *); | |
505 | flags |= ZEROPAD; | |
506 | } | |
1eebd14b | 507 | return number(buf, end, num, 16, field_width, precision, flags); |
6c6166f5 MF |
508 | } |
509 | ||
046a37bd SR |
510 | static int vsnprintf_internal(char *buf, size_t size, const char *fmt, |
511 | va_list args) | |
6c6166f5 | 512 | { |
7b64f66c | 513 | u64 num; |
6c6166f5 MF |
514 | int base; |
515 | char *str; | |
153d511e WD |
516 | |
517 | int flags; /* flags to number() */ | |
518 | ||
519 | int field_width; /* width of output field */ | |
520 | int precision; /* min. # of digits for integers; max | |
521 | number of chars for from string */ | |
6c6166f5 MF |
522 | int qualifier; /* 'h', 'l', or 'L' for integer fields */ |
523 | /* 'z' support added 23/7/1999 S.H. */ | |
524 | /* 'z' changed to 'Z' --davidm 1/25/99 */ | |
525 | /* 't' added for ptrdiff_t */ | |
046a37bd | 526 | char *end = buf + size; |
6c6166f5 | 527 | |
046a37bd SR |
528 | /* Make sure end is always >= buf - do we want this in U-Boot? */ |
529 | if (end < buf) { | |
530 | end = ((void *)-1); | |
531 | size = end - buf; | |
532 | } | |
6c6166f5 | 533 | str = buf; |
153d511e | 534 | |
6c6166f5 | 535 | for (; *fmt ; ++fmt) { |
153d511e | 536 | if (*fmt != '%') { |
046a37bd | 537 | ADDCH(str, *fmt); |
153d511e WD |
538 | continue; |
539 | } | |
540 | ||
541 | /* process flags */ | |
542 | flags = 0; | |
8acdae68 | 543 | repeat: |
153d511e WD |
544 | ++fmt; /* this also skips first '%' */ |
545 | switch (*fmt) { | |
8acdae68 DS |
546 | case '-': |
547 | flags |= LEFT; | |
548 | goto repeat; | |
549 | case '+': | |
550 | flags |= PLUS; | |
551 | goto repeat; | |
552 | case ' ': | |
553 | flags |= SPACE; | |
554 | goto repeat; | |
555 | case '#': | |
556 | flags |= SPECIAL; | |
557 | goto repeat; | |
558 | case '0': | |
559 | flags |= ZEROPAD; | |
560 | goto repeat; | |
6c6166f5 | 561 | } |
153d511e WD |
562 | |
563 | /* get field width */ | |
564 | field_width = -1; | |
565 | if (is_digit(*fmt)) | |
566 | field_width = skip_atoi(&fmt); | |
567 | else if (*fmt == '*') { | |
568 | ++fmt; | |
569 | /* it's the next argument */ | |
570 | field_width = va_arg(args, int); | |
571 | if (field_width < 0) { | |
572 | field_width = -field_width; | |
573 | flags |= LEFT; | |
574 | } | |
575 | } | |
576 | ||
577 | /* get the precision */ | |
578 | precision = -1; | |
579 | if (*fmt == '.') { | |
580 | ++fmt; | |
581 | if (is_digit(*fmt)) | |
582 | precision = skip_atoi(&fmt); | |
583 | else if (*fmt == '*') { | |
584 | ++fmt; | |
585 | /* it's the next argument */ | |
586 | precision = va_arg(args, int); | |
587 | } | |
588 | if (precision < 0) | |
589 | precision = 0; | |
590 | } | |
591 | ||
592 | /* get the conversion qualifier */ | |
593 | qualifier = -1; | |
f354b73e | 594 | if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || |
6c6166f5 | 595 | *fmt == 'Z' || *fmt == 'z' || *fmt == 't') { |
153d511e | 596 | qualifier = *fmt; |
6c6166f5 MF |
597 | ++fmt; |
598 | if (qualifier == 'l' && *fmt == 'l') { | |
599 | qualifier = 'L'; | |
bf052939 JY |
600 | ++fmt; |
601 | } | |
153d511e WD |
602 | } |
603 | ||
604 | /* default base */ | |
605 | base = 10; | |
606 | ||
607 | switch (*fmt) { | |
608 | case 'c': | |
046a37bd | 609 | if (!(flags & LEFT)) { |
153d511e | 610 | while (--field_width > 0) |
046a37bd SR |
611 | ADDCH(str, ' '); |
612 | } | |
613 | ADDCH(str, (unsigned char) va_arg(args, int)); | |
153d511e | 614 | while (--field_width > 0) |
046a37bd | 615 | ADDCH(str, ' '); |
153d511e WD |
616 | continue; |
617 | ||
618 | case 's': | |
fbb3ea80 HS |
619 | /* U-Boot uses UTF-16 strings in the EFI context only. */ |
620 | #if CONFIG_IS_ENABLED(EFI_LOADER) && !defined(API_BUILD) | |
621 | if (qualifier == 'l') { | |
274325c5 RC |
622 | str = string16(str, end, va_arg(args, u16 *), |
623 | field_width, precision, flags); | |
fbb3ea80 HS |
624 | } else |
625 | #endif | |
626 | { | |
274325c5 RC |
627 | str = string(str, end, va_arg(args, char *), |
628 | field_width, precision, flags); | |
629 | } | |
153d511e WD |
630 | continue; |
631 | ||
632 | case 'p': | |
8acdae68 | 633 | str = pointer(fmt + 1, str, end, |
6c6166f5 MF |
634 | va_arg(args, void *), |
635 | field_width, precision, flags); | |
256060e4 HS |
636 | if (IS_ERR(str)) |
637 | return PTR_ERR(str); | |
6c6166f5 MF |
638 | /* Skip all alphanumeric pointer suffixes */ |
639 | while (isalnum(fmt[1])) | |
640 | fmt++; | |
153d511e WD |
641 | continue; |
642 | ||
153d511e WD |
643 | case 'n': |
644 | if (qualifier == 'l') { | |
8acdae68 | 645 | long *ip = va_arg(args, long *); |
153d511e WD |
646 | *ip = (str - buf); |
647 | } else { | |
8acdae68 | 648 | int *ip = va_arg(args, int *); |
153d511e WD |
649 | *ip = (str - buf); |
650 | } | |
651 | continue; | |
652 | ||
653 | case '%': | |
046a37bd | 654 | ADDCH(str, '%'); |
153d511e WD |
655 | continue; |
656 | ||
657 | /* integer number formats - set up the flags and "break" */ | |
658 | case 'o': | |
659 | base = 8; | |
660 | break; | |
661 | ||
153d511e | 662 | case 'x': |
6c6166f5 MF |
663 | flags |= SMALL; |
664 | case 'X': | |
153d511e WD |
665 | base = 16; |
666 | break; | |
667 | ||
668 | case 'd': | |
669 | case 'i': | |
670 | flags |= SIGN; | |
671 | case 'u': | |
672 | break; | |
673 | ||
674 | default: | |
046a37bd | 675 | ADDCH(str, '%'); |
153d511e | 676 | if (*fmt) |
046a37bd | 677 | ADDCH(str, *fmt); |
153d511e WD |
678 | else |
679 | --fmt; | |
680 | continue; | |
681 | } | |
6c6166f5 | 682 | if (qualifier == 'L') /* "quad" for 64 bit variables */ |
c40b2956 | 683 | num = va_arg(args, unsigned long long); |
4b142feb | 684 | else if (qualifier == 'l') { |
153d511e | 685 | num = va_arg(args, unsigned long); |
6c6166f5 MF |
686 | if (flags & SIGN) |
687 | num = (signed long) num; | |
f354b73e JCPV |
688 | } else if (qualifier == 'Z' || qualifier == 'z') { |
689 | num = va_arg(args, size_t); | |
690 | } else if (qualifier == 't') { | |
691 | num = va_arg(args, ptrdiff_t); | |
692 | } else if (qualifier == 'h') { | |
153d511e WD |
693 | num = (unsigned short) va_arg(args, int); |
694 | if (flags & SIGN) | |
6c6166f5 MF |
695 | num = (signed short) num; |
696 | } else { | |
153d511e | 697 | num = va_arg(args, unsigned int); |
6c6166f5 MF |
698 | if (flags & SIGN) |
699 | num = (signed int) num; | |
700 | } | |
046a37bd SR |
701 | str = number(str, end, num, base, field_width, precision, |
702 | flags); | |
703 | } | |
704 | ||
046a37bd SR |
705 | if (size > 0) { |
706 | ADDCH(str, '\0'); | |
707 | if (str > end) | |
708 | end[-1] = '\0'; | |
686f60f5 | 709 | --str; |
153d511e | 710 | } |
046a37bd | 711 | /* the trailing null byte doesn't count towards the total */ |
8acdae68 | 712 | return str - buf; |
153d511e WD |
713 | } |
714 | ||
046a37bd SR |
715 | int vsnprintf(char *buf, size_t size, const char *fmt, |
716 | va_list args) | |
717 | { | |
718 | return vsnprintf_internal(buf, size, fmt, args); | |
719 | } | |
720 | ||
046a37bd SR |
721 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) |
722 | { | |
723 | int i; | |
724 | ||
725 | i = vsnprintf(buf, size, fmt, args); | |
726 | ||
727 | if (likely(i < size)) | |
728 | return i; | |
729 | if (size != 0) | |
730 | return size - 1; | |
731 | return 0; | |
732 | } | |
733 | ||
046a37bd SR |
734 | int snprintf(char *buf, size_t size, const char *fmt, ...) |
735 | { | |
736 | va_list args; | |
737 | int i; | |
738 | ||
739 | va_start(args, fmt); | |
740 | i = vsnprintf(buf, size, fmt, args); | |
741 | va_end(args); | |
742 | ||
743 | return i; | |
744 | } | |
745 | ||
046a37bd SR |
746 | int scnprintf(char *buf, size_t size, const char *fmt, ...) |
747 | { | |
748 | va_list args; | |
749 | int i; | |
750 | ||
751 | va_start(args, fmt); | |
752 | i = vscnprintf(buf, size, fmt, args); | |
753 | va_end(args); | |
754 | ||
755 | return i; | |
756 | } | |
046a37bd SR |
757 | |
758 | /** | |
759 | * Format a string and place it in a buffer (va_list version) | |
760 | * | |
761 | * @param buf The buffer to place the result into | |
762 | * @param fmt The format string to use | |
763 | * @param args Arguments for the format string | |
764 | * | |
765 | * The function returns the number of characters written | |
766 | * into @buf. Use vsnprintf() or vscnprintf() in order to avoid | |
767 | * buffer overflows. | |
768 | * | |
769 | * If you're not already dealing with a va_list consider using sprintf(). | |
770 | */ | |
771 | int vsprintf(char *buf, const char *fmt, va_list args) | |
772 | { | |
773 | return vsnprintf_internal(buf, INT_MAX, fmt, args); | |
774 | } | |
775 | ||
8acdae68 | 776 | int sprintf(char *buf, const char *fmt, ...) |
153d511e WD |
777 | { |
778 | va_list args; | |
779 | int i; | |
780 | ||
781 | va_start(args, fmt); | |
8acdae68 | 782 | i = vsprintf(buf, fmt, args); |
153d511e WD |
783 | va_end(args); |
784 | return i; | |
785 | } | |
786 | ||
4f1eed75 | 787 | #if CONFIG_IS_ENABLED(PRINTF) |
7d9cde10 SR |
788 | int printf(const char *fmt, ...) |
789 | { | |
790 | va_list args; | |
791 | uint i; | |
792 | char printbuffer[CONFIG_SYS_PBSIZE]; | |
793 | ||
794 | va_start(args, fmt); | |
795 | ||
796 | /* | |
797 | * For this to work, printbuffer must be larger than | |
798 | * anything we ever want to print. | |
799 | */ | |
800 | i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args); | |
801 | va_end(args); | |
802 | ||
256060e4 HS |
803 | /* Handle error */ |
804 | if (i <= 0) | |
805 | return i; | |
7d9cde10 SR |
806 | /* Print the string */ |
807 | puts(printbuffer); | |
808 | return i; | |
809 | } | |
810 | ||
811 | int vprintf(const char *fmt, va_list args) | |
812 | { | |
813 | uint i; | |
814 | char printbuffer[CONFIG_SYS_PBSIZE]; | |
815 | ||
816 | /* | |
817 | * For this to work, printbuffer must be larger than | |
818 | * anything we ever want to print. | |
819 | */ | |
820 | i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args); | |
821 | ||
256060e4 HS |
822 | /* Handle error */ |
823 | if (i <= 0) | |
824 | return i; | |
7d9cde10 SR |
825 | /* Print the string */ |
826 | puts(printbuffer); | |
827 | return i; | |
828 | } | |
4f1eed75 | 829 | #endif |
66312374 | 830 | |
3cce8a54 SG |
831 | char *simple_itoa(ulong i) |
832 | { | |
833 | /* 21 digits plus null terminator, good for 64-bit or smaller ints */ | |
834 | static char local[22]; | |
835 | char *p = &local[21]; | |
836 | ||
837 | *p-- = '\0'; | |
838 | do { | |
839 | *p-- = '0' + i % 10; | |
840 | i /= 10; | |
841 | } while (i > 0); | |
842 | return p + 1; | |
843 | } | |
b8bcaa3a SG |
844 | |
845 | /* We don't seem to have %'d in U-Boot */ | |
846 | void print_grouped_ull(unsigned long long int_val, int digits) | |
847 | { | |
848 | char str[21], *s; | |
849 | int grab = 3; | |
850 | ||
851 | digits = (digits + 2) / 3; | |
852 | sprintf(str, "%*llu", digits * 3, int_val); | |
853 | for (s = str; *s; s += grab) { | |
854 | if (s != str) | |
855 | putc(s[-1] != ' ' ? ',' : ' '); | |
856 | printf("%.*s", grab, s); | |
857 | grab = 3; | |
858 | } | |
859 | } | |
09c32807 HS |
860 | |
861 | bool str2off(const char *p, loff_t *num) | |
862 | { | |
863 | char *endptr; | |
864 | ||
865 | *num = simple_strtoull(p, &endptr, 16); | |
866 | return *p != '\0' && *endptr == '\0'; | |
867 | } | |
868 | ||
869 | bool str2long(const char *p, ulong *num) | |
870 | { | |
871 | char *endptr; | |
872 | ||
873 | *num = simple_strtoul(p, &endptr, 16); | |
874 | return *p != '\0' && *endptr == '\0'; | |
875 | } |