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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> | |
22ada0c8 | 18 | #include <uuid.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 | ||
274325c5 RC |
276 | static char *string16(char *buf, char *end, u16 *s, int field_width, |
277 | int precision, int flags) | |
278 | { | |
279 | u16 *str = s ? s : L"<NULL>"; | |
280 | int utf16_len = utf16_strnlen(str, precision); | |
281 | u8 utf8[utf16_len * MAX_UTF8_PER_UTF16]; | |
282 | int utf8_len, i; | |
283 | ||
284 | utf8_len = utf16_to_utf8(utf8, str, utf16_len) - utf8; | |
285 | ||
286 | if (!(flags & LEFT)) | |
287 | while (utf8_len < field_width--) | |
288 | ADDCH(buf, ' '); | |
289 | for (i = 0; i < utf8_len; ++i) | |
290 | ADDCH(buf, utf8[i]); | |
291 | while (utf8_len < field_width--) | |
292 | ADDCH(buf, ' '); | |
293 | return buf; | |
294 | } | |
295 | ||
256060e4 HS |
296 | #if defined(CONFIG_EFI_LOADER) && \ |
297 | !defined(CONFIG_SPL_BUILD) && !defined(API_BUILD) | |
298 | static char *device_path_string(char *buf, char *end, void *dp, int field_width, | |
299 | int precision, int flags) | |
300 | { | |
301 | u16 *str; | |
302 | ||
303 | if (!dp) | |
304 | return "<NULL>"; | |
305 | ||
306 | str = efi_dp_str((struct efi_device_path *)dp); | |
307 | if (!str) | |
308 | return ERR_PTR(-ENOMEM); | |
309 | ||
310 | buf = string16(buf, end, str, field_width, precision, flags); | |
311 | efi_free_pool(str); | |
312 | return buf; | |
313 | } | |
314 | #endif | |
315 | ||
6c6166f5 | 316 | #ifdef CONFIG_CMD_NET |
d7b2d9df JH |
317 | static const char hex_asc[] = "0123456789abcdef"; |
318 | #define hex_asc_lo(x) hex_asc[((x) & 0x0f)] | |
319 | #define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4] | |
320 | ||
321 | static inline char *pack_hex_byte(char *buf, u8 byte) | |
322 | { | |
323 | *buf++ = hex_asc_hi(byte); | |
324 | *buf++ = hex_asc_lo(byte); | |
325 | return buf; | |
326 | } | |
327 | ||
046a37bd | 328 | static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width, |
6c6166f5 | 329 | int precision, int flags) |
153d511e | 330 | { |
8acdae68 DS |
331 | /* (6 * 2 hex digits), 5 colons and trailing zero */ |
332 | char mac_addr[6 * 3]; | |
6c6166f5 MF |
333 | char *p = mac_addr; |
334 | int i; | |
335 | ||
336 | for (i = 0; i < 6; i++) { | |
337 | p = pack_hex_byte(p, addr[i]); | |
338 | if (!(flags & SPECIAL) && i != 5) | |
339 | *p++ = ':'; | |
340 | } | |
341 | *p = '\0'; | |
342 | ||
046a37bd SR |
343 | return string(buf, end, mac_addr, field_width, precision, |
344 | flags & ~SPECIAL); | |
6c6166f5 MF |
345 | } |
346 | ||
046a37bd | 347 | static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width, |
6c6166f5 MF |
348 | int precision, int flags) |
349 | { | |
8acdae68 DS |
350 | /* (8 * 4 hex digits), 7 colons and trailing zero */ |
351 | char ip6_addr[8 * 5]; | |
6c6166f5 MF |
352 | char *p = ip6_addr; |
353 | int i; | |
354 | ||
355 | for (i = 0; i < 8; i++) { | |
356 | p = pack_hex_byte(p, addr[2 * i]); | |
357 | p = pack_hex_byte(p, addr[2 * i + 1]); | |
358 | if (!(flags & SPECIAL) && i != 7) | |
359 | *p++ = ':'; | |
360 | } | |
361 | *p = '\0'; | |
362 | ||
046a37bd SR |
363 | return string(buf, end, ip6_addr, field_width, precision, |
364 | flags & ~SPECIAL); | |
6c6166f5 MF |
365 | } |
366 | ||
046a37bd | 367 | static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width, |
6c6166f5 MF |
368 | int precision, int flags) |
369 | { | |
8acdae68 DS |
370 | /* (4 * 3 decimal digits), 3 dots and trailing zero */ |
371 | char ip4_addr[4 * 4]; | |
6c6166f5 MF |
372 | char temp[3]; /* hold each IP quad in reverse order */ |
373 | char *p = ip4_addr; | |
374 | int i, digits; | |
375 | ||
376 | for (i = 0; i < 4; i++) { | |
377 | digits = put_dec_trunc(temp, addr[i]) - temp; | |
378 | /* reverse the digits in the quad */ | |
379 | while (digits--) | |
380 | *p++ = temp[digits]; | |
381 | if (i != 3) | |
382 | *p++ = '.'; | |
383 | } | |
384 | *p = '\0'; | |
385 | ||
046a37bd SR |
386 | return string(buf, end, ip4_addr, field_width, precision, |
387 | flags & ~SPECIAL); | |
6c6166f5 | 388 | } |
c40b2956 | 389 | #endif |
6c6166f5 | 390 | |
22ada0c8 RC |
391 | #ifdef CONFIG_LIB_UUID |
392 | /* | |
393 | * This works (roughly) the same way as linux's, but we currently always | |
394 | * print lower-case (ie. we just keep %pUB and %pUL for compat with linux), | |
395 | * mostly just because that is what uuid_bin_to_str() supports. | |
396 | * | |
397 | * %pUb: 01020304-0506-0708-090a-0b0c0d0e0f10 | |
398 | * %pUl: 04030201-0605-0807-090a-0b0c0d0e0f10 | |
399 | */ | |
400 | static char *uuid_string(char *buf, char *end, u8 *addr, int field_width, | |
401 | int precision, int flags, const char *fmt) | |
402 | { | |
403 | char uuid[UUID_STR_LEN + 1]; | |
404 | int str_format = UUID_STR_FORMAT_STD; | |
405 | ||
406 | switch (*(++fmt)) { | |
407 | case 'L': | |
408 | case 'l': | |
409 | str_format = UUID_STR_FORMAT_GUID; | |
410 | break; | |
411 | case 'B': | |
412 | case 'b': | |
413 | /* this is the default */ | |
414 | break; | |
415 | default: | |
416 | break; | |
417 | } | |
418 | ||
419 | uuid_bin_to_str(addr, uuid, str_format); | |
420 | ||
421 | return string(buf, end, uuid, field_width, precision, flags); | |
422 | } | |
423 | #endif | |
424 | ||
6c6166f5 MF |
425 | /* |
426 | * Show a '%p' thing. A kernel extension is that the '%p' is followed | |
427 | * by an extra set of alphanumeric characters that are extended format | |
428 | * specifiers. | |
429 | * | |
430 | * Right now we handle: | |
431 | * | |
432 | * - 'M' For a 6-byte MAC address, it prints the address in the | |
433 | * usual colon-separated hex notation | |
434 | * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated | |
435 | * decimal for v4 and colon separated network-order 16 bit hex for v6) | |
436 | * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is | |
437 | * currently the same | |
438 | * | |
439 | * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 | |
440 | * function pointers are really function descriptors, which contain a | |
441 | * pointer to the real address. | |
442 | */ | |
046a37bd SR |
443 | static char *pointer(const char *fmt, char *buf, char *end, void *ptr, |
444 | int field_width, int precision, int flags) | |
6c6166f5 | 445 | { |
1eebd14b TR |
446 | u64 num = (uintptr_t)ptr; |
447 | ||
d266f669 WD |
448 | /* |
449 | * Being a boot loader, we explicitly allow pointers to | |
450 | * (physical) address null. | |
451 | */ | |
452 | #if 0 | |
6c6166f5 | 453 | if (!ptr) |
046a37bd SR |
454 | return string(buf, end, "(null)", field_width, precision, |
455 | flags); | |
d266f669 | 456 | #endif |
6c6166f5 | 457 | |
6c6166f5 | 458 | switch (*fmt) { |
256060e4 HS |
459 | #if defined(CONFIG_EFI_LOADER) && \ |
460 | !defined(CONFIG_SPL_BUILD) && !defined(API_BUILD) | |
461 | case 'D': | |
462 | return device_path_string(buf, end, ptr, field_width, | |
463 | precision, flags); | |
464 | #endif | |
22ada0c8 | 465 | #ifdef CONFIG_CMD_NET |
1eebd14b TR |
466 | case 'a': |
467 | flags |= SPECIAL | ZEROPAD; | |
468 | ||
469 | switch (fmt[1]) { | |
470 | case 'p': | |
471 | default: | |
472 | field_width = sizeof(phys_addr_t) * 2 + 2; | |
473 | num = *(phys_addr_t *)ptr; | |
474 | break; | |
475 | } | |
476 | break; | |
6c6166f5 MF |
477 | case 'm': |
478 | flags |= SPECIAL; | |
479 | /* Fallthrough */ | |
480 | case 'M': | |
046a37bd SR |
481 | return mac_address_string(buf, end, ptr, field_width, |
482 | precision, flags); | |
6c6166f5 MF |
483 | case 'i': |
484 | flags |= SPECIAL; | |
485 | /* Fallthrough */ | |
486 | case 'I': | |
487 | if (fmt[1] == '6') | |
046a37bd SR |
488 | return ip6_addr_string(buf, end, ptr, field_width, |
489 | precision, flags); | |
6c6166f5 | 490 | if (fmt[1] == '4') |
046a37bd SR |
491 | return ip4_addr_string(buf, end, ptr, field_width, |
492 | precision, flags); | |
6c6166f5 MF |
493 | flags &= ~SPECIAL; |
494 | break; | |
6c6166f5 | 495 | #endif |
22ada0c8 RC |
496 | #ifdef CONFIG_LIB_UUID |
497 | case 'U': | |
498 | return uuid_string(buf, end, ptr, field_width, precision, | |
499 | flags, fmt); | |
500 | #endif | |
501 | default: | |
502 | break; | |
503 | } | |
6c6166f5 MF |
504 | flags |= SMALL; |
505 | if (field_width == -1) { | |
506 | field_width = 2*sizeof(void *); | |
507 | flags |= ZEROPAD; | |
508 | } | |
1eebd14b | 509 | return number(buf, end, num, 16, field_width, precision, flags); |
6c6166f5 MF |
510 | } |
511 | ||
046a37bd SR |
512 | static int vsnprintf_internal(char *buf, size_t size, const char *fmt, |
513 | va_list args) | |
6c6166f5 | 514 | { |
7b64f66c | 515 | u64 num; |
6c6166f5 MF |
516 | int base; |
517 | char *str; | |
153d511e WD |
518 | |
519 | int flags; /* flags to number() */ | |
520 | ||
521 | int field_width; /* width of output field */ | |
522 | int precision; /* min. # of digits for integers; max | |
523 | number of chars for from string */ | |
6c6166f5 MF |
524 | int qualifier; /* 'h', 'l', or 'L' for integer fields */ |
525 | /* 'z' support added 23/7/1999 S.H. */ | |
526 | /* 'z' changed to 'Z' --davidm 1/25/99 */ | |
527 | /* 't' added for ptrdiff_t */ | |
046a37bd | 528 | char *end = buf + size; |
6c6166f5 | 529 | |
046a37bd SR |
530 | /* Make sure end is always >= buf - do we want this in U-Boot? */ |
531 | if (end < buf) { | |
532 | end = ((void *)-1); | |
533 | size = end - buf; | |
534 | } | |
6c6166f5 | 535 | str = buf; |
153d511e | 536 | |
6c6166f5 | 537 | for (; *fmt ; ++fmt) { |
153d511e | 538 | if (*fmt != '%') { |
046a37bd | 539 | ADDCH(str, *fmt); |
153d511e WD |
540 | continue; |
541 | } | |
542 | ||
543 | /* process flags */ | |
544 | flags = 0; | |
8acdae68 | 545 | repeat: |
153d511e WD |
546 | ++fmt; /* this also skips first '%' */ |
547 | switch (*fmt) { | |
8acdae68 DS |
548 | case '-': |
549 | flags |= LEFT; | |
550 | goto repeat; | |
551 | case '+': | |
552 | flags |= PLUS; | |
553 | goto repeat; | |
554 | case ' ': | |
555 | flags |= SPACE; | |
556 | goto repeat; | |
557 | case '#': | |
558 | flags |= SPECIAL; | |
559 | goto repeat; | |
560 | case '0': | |
561 | flags |= ZEROPAD; | |
562 | goto repeat; | |
6c6166f5 | 563 | } |
153d511e WD |
564 | |
565 | /* get field width */ | |
566 | field_width = -1; | |
567 | if (is_digit(*fmt)) | |
568 | field_width = skip_atoi(&fmt); | |
569 | else if (*fmt == '*') { | |
570 | ++fmt; | |
571 | /* it's the next argument */ | |
572 | field_width = va_arg(args, int); | |
573 | if (field_width < 0) { | |
574 | field_width = -field_width; | |
575 | flags |= LEFT; | |
576 | } | |
577 | } | |
578 | ||
579 | /* get the precision */ | |
580 | precision = -1; | |
581 | if (*fmt == '.') { | |
582 | ++fmt; | |
583 | if (is_digit(*fmt)) | |
584 | precision = skip_atoi(&fmt); | |
585 | else if (*fmt == '*') { | |
586 | ++fmt; | |
587 | /* it's the next argument */ | |
588 | precision = va_arg(args, int); | |
589 | } | |
590 | if (precision < 0) | |
591 | precision = 0; | |
592 | } | |
593 | ||
594 | /* get the conversion qualifier */ | |
595 | qualifier = -1; | |
f354b73e | 596 | if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || |
6c6166f5 | 597 | *fmt == 'Z' || *fmt == 'z' || *fmt == 't') { |
153d511e | 598 | qualifier = *fmt; |
6c6166f5 MF |
599 | ++fmt; |
600 | if (qualifier == 'l' && *fmt == 'l') { | |
601 | qualifier = 'L'; | |
bf052939 JY |
602 | ++fmt; |
603 | } | |
153d511e WD |
604 | } |
605 | ||
606 | /* default base */ | |
607 | base = 10; | |
608 | ||
609 | switch (*fmt) { | |
610 | case 'c': | |
046a37bd | 611 | if (!(flags & LEFT)) { |
153d511e | 612 | while (--field_width > 0) |
046a37bd SR |
613 | ADDCH(str, ' '); |
614 | } | |
615 | ADDCH(str, (unsigned char) va_arg(args, int)); | |
153d511e | 616 | while (--field_width > 0) |
046a37bd | 617 | ADDCH(str, ' '); |
153d511e WD |
618 | continue; |
619 | ||
620 | case 's': | |
274325c5 RC |
621 | if (qualifier == 'l' && !IS_ENABLED(CONFIG_SPL_BUILD)) { |
622 | str = string16(str, end, va_arg(args, u16 *), | |
623 | field_width, precision, flags); | |
624 | } else { | |
625 | str = string(str, end, va_arg(args, char *), | |
626 | field_width, precision, flags); | |
627 | } | |
153d511e WD |
628 | continue; |
629 | ||
630 | case 'p': | |
8acdae68 | 631 | str = pointer(fmt + 1, str, end, |
6c6166f5 MF |
632 | va_arg(args, void *), |
633 | field_width, precision, flags); | |
256060e4 HS |
634 | if (IS_ERR(str)) |
635 | return PTR_ERR(str); | |
6c6166f5 MF |
636 | /* Skip all alphanumeric pointer suffixes */ |
637 | while (isalnum(fmt[1])) | |
638 | fmt++; | |
153d511e WD |
639 | continue; |
640 | ||
153d511e WD |
641 | case 'n': |
642 | if (qualifier == 'l') { | |
8acdae68 | 643 | long *ip = va_arg(args, long *); |
153d511e WD |
644 | *ip = (str - buf); |
645 | } else { | |
8acdae68 | 646 | int *ip = va_arg(args, int *); |
153d511e WD |
647 | *ip = (str - buf); |
648 | } | |
649 | continue; | |
650 | ||
651 | case '%': | |
046a37bd | 652 | ADDCH(str, '%'); |
153d511e WD |
653 | continue; |
654 | ||
655 | /* integer number formats - set up the flags and "break" */ | |
656 | case 'o': | |
657 | base = 8; | |
658 | break; | |
659 | ||
153d511e | 660 | case 'x': |
6c6166f5 MF |
661 | flags |= SMALL; |
662 | case 'X': | |
153d511e WD |
663 | base = 16; |
664 | break; | |
665 | ||
666 | case 'd': | |
667 | case 'i': | |
668 | flags |= SIGN; | |
669 | case 'u': | |
670 | break; | |
671 | ||
672 | default: | |
046a37bd | 673 | ADDCH(str, '%'); |
153d511e | 674 | if (*fmt) |
046a37bd | 675 | ADDCH(str, *fmt); |
153d511e WD |
676 | else |
677 | --fmt; | |
678 | continue; | |
679 | } | |
6c6166f5 | 680 | if (qualifier == 'L') /* "quad" for 64 bit variables */ |
c40b2956 | 681 | num = va_arg(args, unsigned long long); |
4b142feb | 682 | else if (qualifier == 'l') { |
153d511e | 683 | num = va_arg(args, unsigned long); |
6c6166f5 MF |
684 | if (flags & SIGN) |
685 | num = (signed long) num; | |
f354b73e JCPV |
686 | } 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') { | |
153d511e WD |
691 | num = (unsigned short) va_arg(args, int); |
692 | if (flags & SIGN) | |
6c6166f5 MF |
693 | num = (signed short) num; |
694 | } else { | |
153d511e | 695 | num = va_arg(args, unsigned int); |
6c6166f5 MF |
696 | if (flags & SIGN) |
697 | num = (signed int) num; | |
698 | } | |
046a37bd SR |
699 | str = number(str, end, num, base, field_width, precision, |
700 | flags); | |
701 | } | |
702 | ||
046a37bd SR |
703 | if (size > 0) { |
704 | ADDCH(str, '\0'); | |
705 | if (str > end) | |
706 | end[-1] = '\0'; | |
686f60f5 | 707 | --str; |
153d511e | 708 | } |
046a37bd | 709 | /* the trailing null byte doesn't count towards the total */ |
8acdae68 | 710 | return str - buf; |
153d511e WD |
711 | } |
712 | ||
046a37bd SR |
713 | int vsnprintf(char *buf, size_t size, const char *fmt, |
714 | va_list args) | |
715 | { | |
716 | return vsnprintf_internal(buf, size, fmt, args); | |
717 | } | |
718 | ||
046a37bd SR |
719 | int 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 | ||
046a37bd SR |
732 | int 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 | ||
046a37bd SR |
744 | int 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 | } | |
046a37bd SR |
755 | |
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 | */ | |
769 | int vsprintf(char *buf, const char *fmt, va_list args) | |
770 | { | |
771 | return vsnprintf_internal(buf, INT_MAX, fmt, args); | |
772 | } | |
773 | ||
8acdae68 | 774 | int sprintf(char *buf, const char *fmt, ...) |
153d511e WD |
775 | { |
776 | va_list args; | |
777 | int i; | |
778 | ||
779 | va_start(args, fmt); | |
8acdae68 | 780 | i = vsprintf(buf, fmt, args); |
153d511e WD |
781 | va_end(args); |
782 | return i; | |
783 | } | |
784 | ||
7d9cde10 SR |
785 | int printf(const char *fmt, ...) |
786 | { | |
787 | va_list args; | |
788 | uint i; | |
789 | char printbuffer[CONFIG_SYS_PBSIZE]; | |
790 | ||
791 | va_start(args, fmt); | |
792 | ||
793 | /* | |
794 | * For this to work, printbuffer must be larger than | |
795 | * anything we ever want to print. | |
796 | */ | |
797 | i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args); | |
798 | va_end(args); | |
799 | ||
256060e4 HS |
800 | /* Handle error */ |
801 | if (i <= 0) | |
802 | return i; | |
7d9cde10 SR |
803 | /* Print the string */ |
804 | puts(printbuffer); | |
805 | return i; | |
806 | } | |
807 | ||
808 | int vprintf(const char *fmt, va_list args) | |
809 | { | |
810 | uint i; | |
811 | char printbuffer[CONFIG_SYS_PBSIZE]; | |
812 | ||
813 | /* | |
814 | * For this to work, printbuffer must be larger than | |
815 | * anything we ever want to print. | |
816 | */ | |
817 | i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args); | |
818 | ||
256060e4 HS |
819 | /* Handle error */ |
820 | if (i <= 0) | |
821 | return i; | |
7d9cde10 SR |
822 | /* Print the string */ |
823 | puts(printbuffer); | |
824 | return i; | |
825 | } | |
826 | ||
66312374 | 827 | |
21726a7a SG |
828 | void __assert_fail(const char *assertion, const char *file, unsigned line, |
829 | const char *function) | |
830 | { | |
831 | /* This will not return */ | |
832 | panic("%s:%u: %s: Assertion `%s' failed.", file, line, function, | |
833 | assertion); | |
834 | } | |
3cce8a54 SG |
835 | |
836 | char *simple_itoa(ulong i) | |
837 | { | |
838 | /* 21 digits plus null terminator, good for 64-bit or smaller ints */ | |
839 | static char local[22]; | |
840 | char *p = &local[21]; | |
841 | ||
842 | *p-- = '\0'; | |
843 | do { | |
844 | *p-- = '0' + i % 10; | |
845 | i /= 10; | |
846 | } while (i > 0); | |
847 | return p + 1; | |
848 | } | |
b8bcaa3a SG |
849 | |
850 | /* We don't seem to have %'d in U-Boot */ | |
851 | void print_grouped_ull(unsigned long long int_val, int digits) | |
852 | { | |
853 | char str[21], *s; | |
854 | int grab = 3; | |
855 | ||
856 | digits = (digits + 2) / 3; | |
857 | sprintf(str, "%*llu", digits * 3, int_val); | |
858 | for (s = str; *s; s += grab) { | |
859 | if (s != str) | |
860 | putc(s[-1] != ' ' ? ',' : ' '); | |
861 | printf("%.*s", grab, s); | |
862 | grab = 3; | |
863 | } | |
864 | } | |
09c32807 HS |
865 | |
866 | bool str2off(const char *p, loff_t *num) | |
867 | { | |
868 | char *endptr; | |
869 | ||
870 | *num = simple_strtoull(p, &endptr, 16); | |
871 | return *p != '\0' && *endptr == '\0'; | |
872 | } | |
873 | ||
874 | bool str2long(const char *p, ulong *num) | |
875 | { | |
876 | char *endptr; | |
877 | ||
878 | *num = simple_strtoul(p, &endptr, 16); | |
879 | return *p != '\0' && *endptr == '\0'; | |
880 | } |