[deliverable/linux.git] / arch / alpha / boot / stdio.c

/*
 * Copyright (C) Paul Mackerras 1997.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */
#include <stdarg.h>
#include <stddef.h>

size_t strnlen(const char * s, size_t count)
{
	const char *sc;

	for (sc = s; count-- && *sc != '\0'; ++sc)
		/* nothing */;
	return sc - s;
}

# define do_div(n, base) ({						\
	unsigned int __base = (base);					\
	unsigned int __rem;						\
	__rem = ((unsigned long long)(n)) % __base;			\
	(n) = ((unsigned long long)(n)) / __base;			\
	__rem;								\
})


static int skip_atoi(const char **s)
{
	int i, c;

	for (i = 0; '0' <= (c = **s) && c <= '9'; ++*s)
		i = i*10 + c - '0';
	return i;
}

#define ZEROPAD	1		/* pad with zero */
#define SIGN	2		/* unsigned/signed long */
#define PLUS	4		/* show plus */
#define SPACE	8		/* space if plus */
#define LEFT	16		/* left justified */
#define SPECIAL	32		/* 0x */
#define LARGE	64		/* use 'ABCDEF' instead of 'abcdef' */

static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
{
	char c,sign,tmp[66];
	const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
	int i;

	if (type & LARGE)
		digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	if (type & LEFT)
		type &= ~ZEROPAD;
	if (base < 2 || base > 36)
		return 0;
	c = (type & ZEROPAD) ? '0' : ' ';
	sign = 0;
	if (type & SIGN) {
		if ((signed long long)num < 0) {
			sign = '-';
			num = - (signed long long)num;
			size--;
		} else if (type & PLUS) {
			sign = '+';
			size--;
		} else if (type & SPACE) {
			sign = ' ';
			size--;
		}
	}
	if (type & SPECIAL) {
		if (base == 16)
			size -= 2;
		else if (base == 8)
			size--;
	}
	i = 0;
	if (num == 0)
		tmp[i++]='0';
	else while (num != 0) {
		tmp[i++] = digits[do_div(num, base)];
	}
	if (i > precision)
		precision = i;
	size -= precision;
	if (!(type&(ZEROPAD+LEFT)))
		while(size-->0)
			*str++ = ' ';
	if (sign)
		*str++ = sign;
	if (type & SPECIAL) {
		if (base==8)
			*str++ = '0';
		else if (base==16) {
			*str++ = '0';
			*str++ = digits[33];
		}
	}
	if (!(type & LEFT))
		while (size-- > 0)
			*str++ = c;
	while (i < precision--)
		*str++ = '0';
	while (i-- > 0)
		*str++ = tmp[i];
	while (size-- > 0)
		*str++ = ' ';
	return str;
}

int vsprintf(char *buf, const char *fmt, va_list args)
{
	int len;
	unsigned long long num;
	int i, base;
	char * str;
	const char *s;

	int flags;		/* flags to number() */

	int field_width;	/* width of output field */
	int precision;		/* min. # of digits for integers; max
				   number of chars for from string */
	int qualifier;		/* 'h', 'l', or 'L' for integer fields */
	                        /* 'z' support added 23/7/1999 S.H.    */
				/* 'z' changed to 'Z' --davidm 1/25/99 */


	for (str=buf ; *fmt ; ++fmt) {
		if (*fmt != '%') {
			*str++ = *fmt;
			continue;
		}

		/* process flags */
		flags = 0;
		repeat:
			++fmt;		/* this also skips first '%' */
			switch (*fmt) {
				case '-': flags |= LEFT; goto repeat;
				case '+': flags |= PLUS; goto repeat;
				case ' ': flags |= SPACE; goto repeat;
				case '#': flags |= SPECIAL; goto repeat;
				case '0': flags |= ZEROPAD; goto repeat;
				}

		/* get field width */
		field_width = -1;
		if ('0' <= *fmt && *fmt <= '9')
			field_width = skip_atoi(&fmt);
		else if (*fmt == '*') {
			++fmt;
			/* it's the next argument */
			field_width = va_arg(args, int);
			if (field_width < 0) {
				field_width = -field_width;
				flags |= LEFT;
			}
		}

		/* get the precision */
		precision = -1;
		if (*fmt == '.') {
			++fmt;
			if ('0' <= *fmt && *fmt <= '9')
				precision = skip_atoi(&fmt);
			else if (*fmt == '*') {
				++fmt;
				/* it's the next argument */
				precision = va_arg(args, int);
			}
			if (precision < 0)
				precision = 0;
		}

		/* get the conversion qualifier */
		qualifier = -1;
		if (*fmt == 'l' && *(fmt + 1) == 'l') {
			qualifier = 'q';
			fmt += 2;
		} else if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L'
			|| *fmt == 'Z') {
			qualifier = *fmt;
			++fmt;
		}

		/* default base */
		base = 10;

		switch (*fmt) {
		case 'c':
			if (!(flags & LEFT))
				while (--field_width > 0)
					*str++ = ' ';
			*str++ = (unsigned char) va_arg(args, int);
			while (--field_width > 0)
				*str++ = ' ';
			continue;

		case 's':
			s = va_arg(args, char *);
			if (!s)
				s = "<NULL>";

			len = strnlen(s, precision);

			if (!(flags & LEFT))
				while (len < field_width--)
					*str++ = ' ';
			for (i = 0; i < len; ++i)
				*str++ = *s++;
			while (len < field_width--)
				*str++ = ' ';
			continue;

		case 'p':
			if (field_width == -1) {
				field_width = 2*sizeof(void *);
				flags |= ZEROPAD;
			}
			str = number(str,
				(unsigned long) va_arg(args, void *), 16,
				field_width, precision, flags);
			continue;


		case 'n':
			if (qualifier == 'l') {
				long * ip = va_arg(args, long *);
				*ip = (str - buf);
			} else if (qualifier == 'Z') {
				size_t * ip = va_arg(args, size_t *);
				*ip = (str - buf);
			} else {
				int * ip = va_arg(args, int *);
				*ip = (str - buf);
			}
			continue;

		case '%':
			*str++ = '%';
			continue;

		/* integer number formats - set up the flags and "break" */
		case 'o':
			base = 8;
			break;

		case 'X':
			flags |= LARGE;
		case 'x':
			base = 16;
			break;

		case 'd':
		case 'i':
			flags |= SIGN;
		case 'u':
			break;

		default:
			*str++ = '%';
			if (*fmt)
				*str++ = *fmt;
			else
				--fmt;
			continue;
		}
		if (qualifier == 'l') {
			num = va_arg(args, unsigned long);
			if (flags & SIGN)
				num = (signed long) num;
		} else if (qualifier == 'q') {
			num = va_arg(args, unsigned long long);
			if (flags & SIGN)
				num = (signed long long) num;
		} else if (qualifier == 'Z') {
			num = va_arg(args, size_t);
		} else if (qualifier == 'h') {
			num = (unsigned short) va_arg(args, int);
			if (flags & SIGN)
				num = (signed short) num;
		} else {
			num = va_arg(args, unsigned int);
			if (flags & SIGN)
				num = (signed int) num;
		}
		str = number(str, num, base, field_width, precision, flags);
	}
	*str = '\0';
	return str-buf;
}

int sprintf(char * buf, const char *fmt, ...)
{
	va_list args;
	int i;

	va_start(args, fmt);
	i=vsprintf(buf,fmt,args);
	va_end(args);
	return i;
}
Commit	Line	Data
23430603 HD	1	/*
	2	* Copyright (C) Paul Mackerras 1997.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*/
	9	#include <stdarg.h>
	10	#include <stddef.h>
	11
	12	size_t strnlen(const char * s, size_t count)
	13	{
	14	const char *sc;
	15
	16	for (sc = s; count-- && *sc != '\0'; ++sc)
	17	/* nothing */;
	18	return sc - s;
	19	}
	20
	21	# define do_div(n, base) ({ \
	22	unsigned int __base = (base); \
	23	unsigned int __rem; \
	24	__rem = ((unsigned long long)(n)) % __base; \
	25	(n) = ((unsigned long long)(n)) / __base; \
	26	__rem; \
	27	})
	28
	29
	30	static int skip_atoi(const char **s)
	31	{
	32	int i, c;
	33
	34	for (i = 0; '0' <= (c = *s) && c <= '9'; ++s)
	35	i = i*10 + c - '0';
	36	return i;
	37	}
	38
	39	#define ZEROPAD 1 /* pad with zero */
	40	#define SIGN 2 /* unsigned/signed long */
	41	#define PLUS 4 /* show plus */
	42	#define SPACE 8 /* space if plus */
	43	#define LEFT 16 /* left justified */
	44	#define SPECIAL 32 /* 0x */
	45	#define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
	46
	47	static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
	48	{
	49	char c,sign,tmp[66];
	50	const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
	51	int i;
	52
	53	if (type & LARGE)
	54	digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	55	if (type & LEFT)
	56	type &= ~ZEROPAD;
	57	if (base < 2 \|\| base > 36)
	58	return 0;
	59	c = (type & ZEROPAD) ? '0' : ' ';
	60	sign = 0;
	61	if (type & SIGN) {
	62	if ((signed long long)num < 0) {
	63	sign = '-';
	64	num = - (signed long long)num;
65	size--;
66	} else if (type & PLUS) {
67	sign = '+';
68	size--;
69	} else if (type & SPACE) {
70	sign = ' ';
71	size--;
72	}
73	}
74	if (type & SPECIAL) {
75	if (base == 16)
76	size -= 2;
77	else if (base == 8)
78	size--;
79	}
80	i = 0;
81	if (num == 0)
82	tmp[i++]='0';
83	else while (num != 0) {
84	tmp[i++] = digits[do_div(num, base)];
85	}
86	if (i > precision)
87	precision = i;
88	size -= precision;
89	if (!(type&(ZEROPAD+LEFT)))
90	while(size-->0)
91	*str++ = ' ';
92	if (sign)
93	*str++ = sign;
94	if (type & SPECIAL) {
95	if (base==8)
96	*str++ = '0';
97	else if (base==16) {
98	*str++ = '0';
99	*str++ = digits[33];
100	}
101	}
102	if (!(type & LEFT))
103	while (size-- > 0)
104	*str++ = c;
105	while (i < precision--)
106	*str++ = '0';
107	while (i-- > 0)
108	*str++ = tmp[i];
109	while (size-- > 0)
110	*str++ = ' ';
111	return str;
112	}
113
114	int vsprintf(char buf, const char fmt, va_list args)
115	{
116	int len;
117	unsigned long long num;
118	int i, base;
119	char * str;
120	const char *s;
121
122	int flags; /* flags to number() */
123
124	int field_width; /* width of output field */
125	int precision; /* min. # of digits for integers; max
126	number of chars for from string */
127	int qualifier; /* 'h', 'l', or 'L' for integer fields */
128	/* 'z' support added 23/7/1999 S.H. */
129	/* 'z' changed to 'Z' --davidm 1/25/99 */
130
131
132	for (str=buf ; *fmt ; ++fmt) {
133	if (*fmt != '%') {
134	str++ = fmt;
135	continue;
136	}
137
138	/* process flags */
139	flags = 0;
140	repeat:
141	++fmt; /* this also skips first '%' */
142	switch (*fmt) {
143	case '-': flags \|= LEFT; goto repeat;
144	case '+': flags \|= PLUS; goto repeat;
145	case ' ': flags \|= SPACE; goto repeat;
146	case '#': flags \|= SPECIAL; goto repeat;
147	case '0': flags \|= ZEROPAD; goto repeat;
148	}
149
150	/* get field width */
151	field_width = -1;
152	if ('0' <= fmt && fmt <= '9')
153	field_width = skip_atoi(&fmt);
154	else if (fmt == '') {
155	++fmt;
156	/* it's the next argument */
157	field_width = va_arg(args, int);
158	if (field_width < 0) {
159	field_width = -field_width;
160	flags \|= LEFT;
161	}
162	}
163
164	/* get the precision */
165	precision = -1;
166	if (*fmt == '.') {
167	++fmt;
168	if ('0' <= fmt && fmt <= '9')
169	precision = skip_atoi(&fmt);
170	else if (fmt == '') {
171	++fmt;
172	/* it's the next argument */
173	precision = va_arg(args, int);
174	}
175	if (precision < 0)
176	precision = 0;
177	}
178
179	/* get the conversion qualifier */
180	qualifier = -1;
181	if (fmt == 'l' && (fmt + 1) == 'l') {
182	qualifier = 'q';
183	fmt += 2;
184	} else if (fmt == 'h' \|\| fmt == 'l' \|\| *fmt == 'L'
185	\|\| *fmt == 'Z') {
186	qualifier = *fmt;
187	++fmt;
188	}
189
190	/* default base */
191	base = 10;
192
193	switch (*fmt) {
194	case 'c':
195	if (!(flags & LEFT))
196	while (--field_width > 0)
197	*str++ = ' ';
198	*str++ = (unsigned char) va_arg(args, int);
199	while (--field_width > 0)
200	*str++ = ' ';
201	continue;
202
203	case 's':
204	s = va_arg(args, char *);
205	if (!s)
206	s = "<NULL>";
207
208	len = strnlen(s, precision);
209
210	if (!(flags & LEFT))
211	while (len < field_width--)
212	*str++ = ' ';
213	for (i = 0; i < len; ++i)
214	str++ = s++;
215	while (len < field_width--)
216	*str++ = ' ';
217	continue;
218
219	case 'p':
220	if (field_width == -1) {
221	field_width = 2sizeof(void );
222	flags \|= ZEROPAD;
223	}
224	str = number(str,
225	(unsigned long) va_arg(args, void *), 16,
226	field_width, precision, flags);
227	continue;
228
229
230	case 'n':
231	if (qualifier == 'l') {
232	long * ip = va_arg(args, long *);
233	*ip = (str - buf);
234	} else if (qualifier == 'Z') {
235	size_t * ip = va_arg(args, size_t *);
236	*ip = (str - buf);
237	} else {
238	int * ip = va_arg(args, int *);
239	*ip = (str - buf);
240	}
241	continue;
242
243	case '%':
244	*str++ = '%';
245	continue;
246
247	/* integer number formats - set up the flags and "break" */
248	case 'o':
249	base = 8;
250	break;
251
252	case 'X':
253	flags \|= LARGE;
254	case 'x':
255	base = 16;
256	break;
257
258	case 'd':
259	case 'i':
260	flags \|= SIGN;
261	case 'u':
262	break;
263
264	default:
265	*str++ = '%';
266	if (*fmt)
267	str++ = fmt;
268	else
269	--fmt;
270	continue;
271	}
272	if (qualifier == 'l') {
273	num = va_arg(args, unsigned long);
274	if (flags & SIGN)
275	num = (signed long) num;
276	} else if (qualifier == 'q') {
277	num = va_arg(args, unsigned long long);
278	if (flags & SIGN)
279	num = (signed long long) num;
280	} else if (qualifier == 'Z') {
281	num = va_arg(args, size_t);
282	} else if (qualifier == 'h') {
283	num = (unsigned short) va_arg(args, int);
284	if (flags & SIGN)
285	num = (signed short) num;
286	} else {
287	num = va_arg(args, unsigned int);
288	if (flags & SIGN)
289	num = (signed int) num;
290	}
291	str = number(str, num, base, field_width, precision, flags);
292	}
293	*str = '\0';
294	return str-buf;
295	}
296
297	int sprintf(char * buf, const char *fmt, ...)
298	{
299	va_list args;
300	int i;
301
302	va_start(args, fmt);
303	i=vsprintf(buf,fmt,args);
304	va_end(args);
305	return i;
306	}