1/*
2 *  linux/lib/vsprintf.c
3 *
4 *  Copyright (C) 1991, 1992  Linus Torvalds
5 * (C) Copyright 2000-2009
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 */
8
9/* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
10/*
11 * Wirzenius wrote this portably, Torvalds fucked it up :-)
12 *
13 * from hush: simple_itoa() was lifted from boa-0.93.15
14 */
15
16#include <charset.h>
17#include <efi_loader.h>
18#include <div64.h>
19#include <hexdump.h>
20#include <stdarg.h>
21#include <uuid.h>
22#include <vsprintf.h>
23#include <linux/ctype.h>
24#include <linux/err.h>
25#include <linux/types.h>
26#include <linux/string.h>
27
28/* we use this so that we can do without the ctype library */
29#define is_digit(c)	((c) >= '0' && (c) <= '9')
30
31static int skip_atoi(const char **s)
32{
33	int i = 0;
34
35	while (is_digit(**s))
36		i = i * 10 + *((*s)++) - '0';
37
38	return i;
39}
40
41/* Decimal conversion is by far the most typical, and is used
42 * for /proc and /sys data. This directly impacts e.g. top performance
43 * with many processes running. We optimize it for speed
44 * using code from
45 * http://www.cs.uiowa.edu/~jones/bcd/decimal.html
46 * (with permission from the author, Douglas W. Jones). */
47
48/* Formats correctly any integer in [0,99999].
49 * Outputs from one to five digits depending on input.
50 * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */
51static char *put_dec_trunc(char *buf, unsigned q)
52{
53	unsigned d3, d2, d1, d0;
54	d1 = (q>>4) & 0xf;
55	d2 = (q>>8) & 0xf;
56	d3 = (q>>12);
57
58	d0 = 6*(d3 + d2 + d1) + (q & 0xf);
59	q = (d0 * 0xcd) >> 11;
60	d0 = d0 - 10*q;
61	*buf++ = d0 + '0'; /* least significant digit */
62	d1 = q + 9*d3 + 5*d2 + d1;
63	if (d1 != 0) {
64		q = (d1 * 0xcd) >> 11;
65		d1 = d1 - 10*q;
66		*buf++ = d1 + '0'; /* next digit */
67
68		d2 = q + 2*d2;
69		if ((d2 != 0) || (d3 != 0)) {
70			q = (d2 * 0xd) >> 7;
71			d2 = d2 - 10*q;
72			*buf++ = d2 + '0'; /* next digit */
73
74			d3 = q + 4*d3;
75			if (d3 != 0) {
76				q = (d3 * 0xcd) >> 11;
77				d3 = d3 - 10*q;
78				*buf++ = d3 + '0';  /* next digit */
79				if (q != 0)
80					*buf++ = q + '0'; /* most sign. digit */
81			}
82		}
83	}
84	return buf;
85}
86/* Same with if's removed. Always emits five digits */
87static char *put_dec_full(char *buf, unsigned q)
88{
89	/* BTW, if q is in [0,9999], 8-bit ints will be enough, */
90	/* but anyway, gcc produces better code with full-sized ints */
91	unsigned d3, d2, d1, d0;
92	d1 = (q>>4) & 0xf;
93	d2 = (q>>8) & 0xf;
94	d3 = (q>>12);
95
96	/*
97	 * Possible ways to approx. divide by 10
98	 * gcc -O2 replaces multiply with shifts and adds
99	 * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386)
100	 * (x * 0x67) >> 10:  1100111
101	 * (x * 0x34) >> 9:    110100 - same
102	 * (x * 0x1a) >> 8:     11010 - same
103	 * (x * 0x0d) >> 7:      1101 - same, shortest code (on i386)
104	 */
105
106	d0 = 6*(d3 + d2 + d1) + (q & 0xf);
107	q = (d0 * 0xcd) >> 11;
108	d0 = d0 - 10*q;
109	*buf++ = d0 + '0';
110	d1 = q + 9*d3 + 5*d2 + d1;
111		q = (d1 * 0xcd) >> 11;
112		d1 = d1 - 10*q;
113		*buf++ = d1 + '0';
114
115		d2 = q + 2*d2;
116			q = (d2 * 0xd) >> 7;
117			d2 = d2 - 10*q;
118			*buf++ = d2 + '0';
119
120			d3 = q + 4*d3;
121				q = (d3 * 0xcd) >> 11; /* - shorter code */
122				/* q = (d3 * 0x67) >> 10; - would also work */
123				d3 = d3 - 10*q;
124				*buf++ = d3 + '0';
125					*buf++ = q + '0';
126	return buf;
127}
128/* No inlining helps gcc to use registers better */
129static noinline char *put_dec(char *buf, uint64_t num)
130{
131	while (1) {
132		unsigned rem;
133		if (num < 100000)
134			return put_dec_trunc(buf, num);
135		rem = do_div(num, 100000);
136		buf = put_dec_full(buf, rem);
137	}
138}
139
140#define ZEROPAD	1		/* pad with zero */
141#define SIGN	2		/* unsigned/signed long */
142#define PLUS	4		/* show plus */
143#define SPACE	8		/* space if plus */
144#define LEFT	16		/* left justified */
145#define SMALL	32		/* Must be 32 == 0x20 */
146#define SPECIAL	64		/* 0x */
147#define ERRSTR	128		/* %dE showing error string if enabled */
148
149/*
150 * Macro to add a new character to our output string, but only if it will
151 * fit. The macro moves to the next character position in the output string.
152 */
153#define ADDCH(str, ch) do { \
154	if ((str) < end) \
155		*(str) = (ch); \
156	++str; \
157	} while (0)
158
159static char *number(char *buf, char *end, u64 num,
160		int base, int size, int precision, int type)
161{
162	/* we are called with base 8, 10 or 16, only, thus don't need "G..."  */
163	static const char digits[16] = "0123456789ABCDEF";
164
165	char tmp[66];
166	char sign;
167	char locase;
168	int need_pfx = ((type & SPECIAL) && base != 10);
169	int i;
170
171	/* locase = 0 or 0x20. ORing digits or letters with 'locase'
172	 * produces same digits or (maybe lowercased) letters */
173	locase = (type & SMALL);
174	if (type & LEFT)
175		type &= ~ZEROPAD;
176	sign = 0;
177	if (type & SIGN) {
178		if ((s64) num < 0) {
179			sign = '-';
180			num = -(s64) num;
181			size--;
182		} else if (type & PLUS) {
183			sign = '+';
184			size--;
185		} else if (type & SPACE) {
186			sign = ' ';
187			size--;
188		}
189	}
190	if (need_pfx) {
191		size--;
192		if (base == 16)
193			size--;
194	}
195
196	/* generate full string in tmp[], in reverse order */
197	i = 0;
198	if (num == 0)
199		tmp[i++] = '0';
200	/* Generic code, for any base:
201	else do {
202		tmp[i++] = (digits[do_div(num,base)] | locase);
203	} while (num != 0);
204	*/
205	else if (base != 10) { /* 8 or 16 */
206		int mask = base - 1;
207		int shift = 3;
208
209		if (base == 16)
210			shift = 4;
211
212		do {
213			tmp[i++] = (digits[((unsigned char)num) & mask]
214					| locase);
215			num >>= shift;
216		} while (num);
217	} else { /* base 10 */
218		i = put_dec(tmp, num) - tmp;
219	}
220
221	/* printing 100 using %2d gives "100", not "00" */
222	if (i > precision)
223		precision = i;
224	/* leading space padding */
225	size -= precision;
226	if (!(type & (ZEROPAD + LEFT))) {
227		while (--size >= 0)
228			ADDCH(buf, ' ');
229	}
230	/* sign */
231	if (sign)
232		ADDCH(buf, sign);
233	/* "0x" / "0" prefix */
234	if (need_pfx) {
235		ADDCH(buf, '0');
236		if (base == 16)
237			ADDCH(buf, 'X' | locase);
238	}
239	/* zero or space padding */
240	if (!(type & LEFT)) {
241		char c = (type & ZEROPAD) ? '0' : ' ';
242
243		while (--size >= 0)
244			ADDCH(buf, c);
245	}
246	/* hmm even more zero padding? */
247	while (i <= --precision)
248		ADDCH(buf, '0');
249	/* actual digits of result */
250	while (--i >= 0)
251		ADDCH(buf, tmp[i]);
252	/* trailing space padding */
253	while (--size >= 0)
254		ADDCH(buf, ' ');
255	return buf;
256}
257
258static char *string(char *buf, char *end, const char *s, int field_width,
259		int precision, int flags)
260{
261	int len, i;
262
263	if (s == NULL)
264		s = "<NULL>";
265
266	len = strnlen(s, precision);
267
268	if (!(flags & LEFT))
269		while (len < field_width--)
270			ADDCH(buf, ' ');
271	for (i = 0; i < len; ++i)
272		ADDCH(buf, *s++);
273	while (len < field_width--)
274		ADDCH(buf, ' ');
275	return buf;
276}
277
278/* U-Boot uses UTF-16 strings in the EFI context only. */
279static __maybe_unused char *string16(char *buf, char *end, u16 *s,
280				     int field_width, int precision, int flags)
281{
282	const u16 *str = s ? s : u"<NULL>";
283	ssize_t i, len = utf16_strnlen(str, precision);
284
285	if (!(flags & LEFT))
286		for (; len < field_width; --field_width)
287			ADDCH(buf, ' ');
288	if (buf < end)
289		*buf = 0;
290	for (i = 0; i < len; ++i) {
291		int slen = utf16_utf8_strnlen(str, 1);
292		s32 s = utf16_get(&str);
293
294		if (s < 0)
295			s = '?';
296		if (buf + slen < end) {
297			utf8_put(s, &buf);
298			if (buf < end)
299				*buf = 0;
300		} else {
301			buf += slen;
302		}
303	}
304	for (; len < field_width; --field_width)
305		ADDCH(buf, ' ');
306
307	return buf;
308}
309
310#if CONFIG_IS_ENABLED(EFI_DEVICE_PATH_TO_TEXT)
311static char *device_path_string(char *buf, char *end, void *dp, int field_width,
312				int precision, int flags)
313{
314	u16 *str;
315
316	/* If dp == NULL output the string '<NULL>' */
317	if (!dp)
318		return string16(buf, end, dp, field_width, precision, flags);
319
320	str = efi_dp_str((struct efi_device_path *)dp);
321	if (!str)
322		return ERR_PTR(-ENOMEM);
323
324	buf = string16(buf, end, str, field_width, precision, flags);
325	efi_free_pool(str);
326	return buf;
327}
328#endif
329
330static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width,
331				int precision, int flags)
332{
333	/* (6 * 2 hex digits), 5 colons and trailing zero */
334	char mac_addr[6 * 3];
335	char *p = mac_addr;
336	int i;
337
338	for (i = 0; i < 6; i++) {
339		p = hex_byte_pack(p, addr[i]);
340		if (!(flags & SPECIAL) && i != 5)
341			*p++ = ':';
342	}
343	*p = '\0';
344
345	return string(buf, end, mac_addr, field_width, precision,
346		      flags & ~SPECIAL);
347}
348
349static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width,
350			 int precision, int flags)
351{
352	/* (8 * 4 hex digits), 7 colons and trailing zero */
353	char ip6_addr[8 * 5];
354	char *p = ip6_addr;
355	int i;
356
357	for (i = 0; i < 8; i++) {
358		p = hex_byte_pack(p, addr[2 * i]);
359		p = hex_byte_pack(p, addr[2 * i + 1]);
360		if (!(flags & SPECIAL) && i != 7)
361			*p++ = ':';
362	}
363	*p = '\0';
364
365	return string(buf, end, ip6_addr, field_width, precision,
366		      flags & ~SPECIAL);
367}
368
369static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,
370			 int precision, int flags)
371{
372	/* (4 * 3 decimal digits), 3 dots and trailing zero */
373	char ip4_addr[4 * 4];
374	char temp[3];	/* hold each IP quad in reverse order */
375	char *p = ip4_addr;
376	int i, digits;
377
378	for (i = 0; i < 4; i++) {
379		digits = put_dec_trunc(temp, addr[i]) - temp;
380		/* reverse the digits in the quad */
381		while (digits--)
382			*p++ = temp[digits];
383		if (i != 3)
384			*p++ = '.';
385	}
386	*p = '\0';
387
388	return string(buf, end, ip4_addr, field_width, precision,
389		      flags & ~SPECIAL);
390}
391
392#ifdef CONFIG_LIB_UUID
393/*
394 * This works (roughly) the same way as Linux's.
395 *
396 *   %pUb:   01020304-0506-0708-090a-0b0c0d0e0f10
397 *   %pUB:   01020304-0506-0708-090A-0B0C0D0E0F10
398 *   %pUl:   04030201-0605-0807-090a-0b0c0d0e0f10
399 *   %pUL:   04030201-0605-0807-090A-0B0C0D0E0F10
400 *   %pUs:   GUID text representation if known or fallback to %pUl
401 */
402static char *uuid_string(char *buf, char *end, u8 *addr, int field_width,
403			 int precision, int flags, const char *fmt)
404{
405	char uuid[UUID_STR_LEN + 1];
406	int str_format;
407	const char *str;
408
409	switch (*(++fmt)) {
410	case 'L':
411		str_format = UUID_STR_FORMAT_GUID | UUID_STR_UPPER_CASE;
412		break;
413	case 'l':
414		str_format = UUID_STR_FORMAT_GUID;
415		break;
416	case 'B':
417		str_format = UUID_STR_FORMAT_STD | UUID_STR_UPPER_CASE;
418		break;
419	case 's':
420		str = uuid_guid_get_str(addr);
421		if (str)
422			return string(buf, end, str,
423				      field_width, precision, flags);
424		str_format = UUID_STR_FORMAT_GUID;
425		break;
426	default:
427		str_format = UUID_STR_FORMAT_STD;
428		break;
429	}
430
431	if (addr)
432		uuid_bin_to_str(addr, uuid, str_format);
433	else
434		strcpy(uuid, "<NULL>");
435
436	return string(buf, end, uuid, field_width, precision, flags);
437}
438#endif
439
440/*
441 * Show a '%p' thing.  A kernel extension is that the '%p' is followed
442 * by an extra set of alphanumeric characters that are extended format
443 * specifiers.
444 *
445 * Right now we handle:
446 *
447 * - 'M' For a 6-byte MAC address, it prints the address in the
448 *       usual colon-separated hex notation
449 * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated
450 *       decimal for v4 and colon separated network-order 16 bit hex for v6)
451 * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is
452 *       currently the same
453 */
454static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
455		int field_width, int precision, int flags)
456{
457	u64 num = (uintptr_t)ptr;
458
459	/*
460	 * Being a boot loader, we explicitly allow pointers to
461	 * (physical) address null.
462	 */
463#if 0
464	if (!ptr)
465		return string(buf, end, "(null)", field_width, precision,
466			      flags);
467#endif
468
469	switch (*fmt) {
470/* Device paths only exist in the EFI context. */
471#if CONFIG_IS_ENABLED(EFI_DEVICE_PATH_TO_TEXT) && !defined(API_BUILD)
472	case 'D':
473		return device_path_string(buf, end, ptr, field_width,
474					  precision, flags);
475#endif
476	case 'a':
477		flags |= SPECIAL | ZEROPAD;
478
479		switch (fmt[1]) {
480		case 'p':
481		default:
482			field_width = sizeof(phys_addr_t) * 2 + 2;
483			num = *(phys_addr_t *)ptr;
484			break;
485		}
486		break;
487	case 'm':
488		flags |= SPECIAL;
489		/* Fallthrough */
490	case 'M':
491		return mac_address_string(buf, end, ptr, field_width,
492					  precision, flags);
493	case 'i':
494		flags |= SPECIAL;
495		/* Fallthrough */
496	case 'I':
497		if (IS_ENABLED(CONFIG_IPV6) && fmt[1] == '6')
498			return ip6_addr_string(buf, end, ptr, field_width,
499					       precision, flags);
500		if (fmt[1] == '4')
501			return ip4_addr_string(buf, end, ptr, field_width,
502					       precision, flags);
503		flags &= ~SPECIAL;
504		break;
505#ifdef CONFIG_LIB_UUID
506	case 'U':
507		return uuid_string(buf, end, ptr, field_width, precision,
508				   flags, fmt);
509#endif
510	default:
511		break;
512	}
513	flags |= SMALL;
514	if (field_width == -1) {
515		field_width = 2*sizeof(void *);
516		flags |= ZEROPAD;
517	}
518	return number(buf, end, num, 16, field_width, precision, flags);
519}
520
521static int vsnprintf_internal(char *buf, size_t size, const char *fmt,
522			      va_list args)
523{
524	u64 num;
525	int base;
526	char *str;
527
528	int flags;		/* flags to number() */
529
530	int field_width;	/* width of output field */
531	int precision;		/* min. # of digits for integers; max
532				   number of chars for from string */
533	int qualifier;		/* 'h', 'l', or 'L' for integer fields */
534				/* 'z' support added 23/7/1999 S.H.    */
535				/* 'z' changed to 'Z' --davidm 1/25/99 */
536				/* 't' added for ptrdiff_t */
537	char *end = buf + size;
538
539	/* Make sure end is always >= buf - do we want this in U-Boot? */
540	if (end < buf) {
541		end = ((void *)-1);
542		size = end - buf;
543	}
544	str = buf;
545
546	for (; *fmt ; ++fmt) {
547		if (*fmt != '%') {
548			ADDCH(str, *fmt);
549			continue;
550		}
551
552		/* process flags */
553		flags = 0;
554repeat:
555			++fmt;		/* this also skips first '%' */
556			switch (*fmt) {
557			case '-':
558				flags |= LEFT;
559				goto repeat;
560			case '+':
561				flags |= PLUS;
562				goto repeat;
563			case ' ':
564				flags |= SPACE;
565				goto repeat;
566			case '#':
567				flags |= SPECIAL;
568				goto repeat;
569			case '0':
570				flags |= ZEROPAD;
571				goto repeat;
572			}
573
574		/* get field width */
575		field_width = -1;
576		if (is_digit(*fmt))
577			field_width = skip_atoi(&fmt);
578		else if (*fmt == '*') {
579			++fmt;
580			/* it's the next argument */
581			field_width = va_arg(args, int);
582			if (field_width < 0) {
583				field_width = -field_width;
584				flags |= LEFT;
585			}
586		}
587
588		/* get the precision */
589		precision = -1;
590		if (*fmt == '.') {
591			++fmt;
592			if (is_digit(*fmt))
593				precision = skip_atoi(&fmt);
594			else if (*fmt == '*') {
595				++fmt;
596				/* it's the next argument */
597				precision = va_arg(args, int);
598			}
599			if (precision < 0)
600				precision = 0;
601		}
602
603		/* get the conversion qualifier */
604		qualifier = -1;
605		if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
606		    *fmt == 'Z' || *fmt == 'z' || *fmt == 't') {
607			qualifier = *fmt;
608			++fmt;
609			if (qualifier == 'l' && *fmt == 'l') {
610				qualifier = 'L';
611				++fmt;
612			}
613		}
614
615		/* default base */
616		base = 10;
617
618		switch (*fmt) {
619		case 'c':
620			if (!(flags & LEFT)) {
621				while (--field_width > 0)
622					ADDCH(str, ' ');
623			}
624			ADDCH(str, (unsigned char) va_arg(args, int));
625			while (--field_width > 0)
626				ADDCH(str, ' ');
627			continue;
628
629		case 's':
630/* U-Boot uses UTF-16 strings in the EFI context only. */
631#if (CONFIG_IS_ENABLED(EFI_LOADER) || IS_ENABLED(CONFIG_EFI_APP)) && \
632	!defined(API_BUILD)
633			if (qualifier == 'l') {
634				str = string16(str, end, va_arg(args, u16 *),
635					       field_width, precision, flags);
636			} else
637#endif
638			{
639				str = string(str, end, va_arg(args, char *),
640					     field_width, precision, flags);
641			}
642			continue;
643
644		case 'p':
645			str = pointer(fmt + 1, str, end,
646					va_arg(args, void *),
647					field_width, precision, flags);
648			if (IS_ERR(str))
649				return PTR_ERR(str);
650			/* Skip all alphanumeric pointer suffixes */
651			while (isalnum(fmt[1]))
652				fmt++;
653			continue;
654
655		case 'n':
656			if (qualifier == 'l') {
657				long *ip = va_arg(args, long *);
658				*ip = (str - buf);
659			} else {
660				int *ip = va_arg(args, int *);
661				*ip = (str - buf);
662			}
663			continue;
664
665		case '%':
666			ADDCH(str, '%');
667			continue;
668
669		/* integer number formats - set up the flags and "break" */
670		case 'o':
671			base = 8;
672			break;
673
674		case 'x':
675			flags |= SMALL;
676		/* fallthrough */
677		case 'X':
678			base = 16;
679			break;
680
681		case 'd':
682			if (fmt[1] == 'E') {
683				flags |= ERRSTR;
684				fmt++;
685			}
686		/* fallthrough */
687		case 'i':
688			flags |= SIGN;
689		/* fallthrough */
690		case 'u':
691			break;
692
693		default:
694			ADDCH(str, '%');
695			if (*fmt)
696				ADDCH(str, *fmt);
697			else
698				--fmt;
699			continue;
700		}
701		if (qualifier == 'L')  /* "quad" for 64 bit variables */
702			num = va_arg(args, unsigned long long);
703		else if (qualifier == 'l') {
704			num = va_arg(args, unsigned long);
705			if (flags & SIGN)
706				num = (signed long) num;
707		} else if (qualifier == 'Z' || qualifier == 'z') {
708			num = va_arg(args, size_t);
709		} else if (qualifier == 't') {
710			num = va_arg(args, ptrdiff_t);
711		} else if (qualifier == 'h') {
712			num = (unsigned short) va_arg(args, int);
713			if (flags & SIGN)
714				num = (signed short) num;
715		} else {
716			num = va_arg(args, unsigned int);
717			if (flags & SIGN)
718				num = (signed int) num;
719		}
720		str = number(str, end, num, base, field_width, precision,
721			     flags);
722		if (IS_ENABLED(CONFIG_ERRNO_STR) && (flags & ERRSTR)) {
723			const char *p;
724
725			ADDCH(str, ':');
726			ADDCH(str, ' ');
727			for (p = errno_str(num); *p; p++)
728				ADDCH(str, *p);
729		}
730	}
731
732	if (size > 0) {
733		ADDCH(str, '\0');
734		if (str > end)
735			end[-1] = '\0';
736		--str;
737	}
738	/* the trailing null byte doesn't count towards the total */
739	return str - buf;
740}
741
742int vsnprintf(char *buf, size_t size, const char *fmt,
743			      va_list args)
744{
745	return vsnprintf_internal(buf, size, fmt, args);
746}
747
748int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
749{
750	int i;
751
752	i = vsnprintf(buf, size, fmt, args);
753
754	if (likely(i < size))
755		return i;
756	if (size != 0)
757		return size - 1;
758	return 0;
759}
760
761int snprintf(char *buf, size_t size, const char *fmt, ...)
762{
763	va_list args;
764	int i;
765
766	va_start(args, fmt);
767	i = vsnprintf(buf, size, fmt, args);
768	va_end(args);
769
770	return i;
771}
772
773int scnprintf(char *buf, size_t size, const char *fmt, ...)
774{
775	va_list args;
776	int i;
777
778	va_start(args, fmt);
779	i = vscnprintf(buf, size, fmt, args);
780	va_end(args);
781
782	return i;
783}
784
785/**
786 * Format a string and place it in a buffer (va_list version)
787 *
788 * @param buf	The buffer to place the result into
789 * @param fmt	The format string to use
790 * @param args	Arguments for the format string
791 *
792 * The function returns the number of characters written
793 * into @buf. Use vsnprintf() or vscnprintf() in order to avoid
794 * buffer overflows.
795 *
796 * If you're not already dealing with a va_list consider using sprintf().
797 */
798int vsprintf(char *buf, const char *fmt, va_list args)
799{
800	return vsnprintf_internal(buf, INT_MAX, fmt, args);
801}
802
803int sprintf(char *buf, const char *fmt, ...)
804{
805	va_list args;
806	int i;
807
808	va_start(args, fmt);
809	i = vsprintf(buf, fmt, args);
810	va_end(args);
811	return i;
812}
813
814#if CONFIG_IS_ENABLED(PRINTF)
815int printf(const char *fmt, ...)
816{
817	va_list args;
818	uint i;
819
820	va_start(args, fmt);
821	i = vprintf(fmt, args);
822	va_end(args);
823
824	return i;
825}
826
827int vprintf(const char *fmt, va_list args)
828{
829	uint i;
830	char printbuffer[CONFIG_SYS_PBSIZE];
831
832	/*
833	 * For this to work, printbuffer must be larger than
834	 * anything we ever want to print.
835	 */
836	i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
837
838	/* Handle error */
839	if (i <= 0)
840		return i;
841	/* Print the string */
842	puts(printbuffer);
843	return i;
844}
845#endif
846
847static char local_toa[22];
848
849char *simple_itoa(ulong i)
850{
851	/* 21 digits plus null terminator, good for 64-bit or smaller ints */
852	char *p = &local_toa[21];
853
854	*p-- = '\0';
855	do {
856		*p-- = '0' + i % 10;
857		i /= 10;
858	} while (i > 0);
859	return p + 1;
860}
861
862char *simple_xtoa(ulong num)
863{
864	/* 16 digits plus nul terminator, good for 64-bit or smaller ints */
865	char *p = &local_toa[17];
866
867	*--p = '\0';
868	do {
869		p -= 2;
870		hex_byte_pack(p, num & 0xff);
871		num >>= 8;
872	} while (num > 0);
873
874	return p;
875}
876
877/* We don't seem to have %'d in U-Boot */
878void print_grouped_ull(unsigned long long int_val, int digits)
879{
880	char str[21], *s;
881	int grab = 3;
882
883	digits = (digits + 2) / 3;
884	sprintf(str, "%*llu", digits * 3, int_val);
885	for (s = str; *s; s += grab) {
886		if (s != str)
887			putc(s[-1] != ' ' ? ',' : ' ');
888		printf("%.*s", grab, s);
889		grab = 3;
890	}
891}
892
893bool str2off(const char *p, loff_t *num)
894{
895	char *endptr;
896
897	*num = simple_strtoull(p, &endptr, 16);
898	return *p != '\0' && *endptr == '\0';
899}
900
901bool str2long(const char *p, ulong *num)
902{
903	char *endptr;
904
905	*num = hextoul(p, &endptr);
906	return *p != '\0' && *endptr == '\0';
907}
908
909char *strmhz(char *buf, unsigned long hz)
910{
911	long l, n;
912	long m;
913
914	n = DIV_ROUND_CLOSEST(hz, 1000) / 1000L;
915	l = sprintf(buf, "%ld", n);
916
917	hz -= n * 1000000L;
918	m = DIV_ROUND_CLOSEST(hz, 1000L);
919	if (m != 0)
920		sprintf(buf + l, ".%03ld", m);
921
922	return buf;
923}
924