2 * Copyright (C) Paul Mackerras 1997.
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.
12 size_t strnlen(const char * s, size_t count)
16 for (sc = s; count-- && *sc != '\0'; ++sc)
21 # define do_div(n, base) ({ \
22 unsigned int __base = (base); \
24 __rem = ((unsigned long long)(n)) % __base; \
25 (n) = ((unsigned long long)(n)) / __base; \
30 static int skip_atoi(const char **s)
34 for (i = 0; '0' <= (c = **s) && c <= '9'; ++*s)
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' */
47 static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
50 const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
54 digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
57 if (base < 2 || base > 36)
59 c = (type & ZEROPAD) ? '0' : ' ';
62 if ((signed long long)num < 0) {
64 num = - (signed long long)num;
66 } else if (type & PLUS) {
69 } else if (type & SPACE) {
83 else while (num != 0) {
84 tmp[i++] = digits[do_div(num, base)];
89 if (!(type&(ZEROPAD+LEFT)))
105 while (i < precision--)
114 int vsprintf(char *buf, const char *fmt, va_list args)
117 unsigned long long num;
122 int flags; /* flags to number() */
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 */
132 for (str=buf ; *fmt ; ++fmt) {
141 ++fmt; /* this also skips first '%' */
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;
150 /* get field width */
152 if ('0' <= *fmt && *fmt <= '9')
153 field_width = skip_atoi(&fmt);
154 else if (*fmt == '*') {
156 /* it's the next argument */
157 field_width = va_arg(args, int);
158 if (field_width < 0) {
159 field_width = -field_width;
164 /* get the precision */
168 if ('0' <= *fmt && *fmt <= '9')
169 precision = skip_atoi(&fmt);
170 else if (*fmt == '*') {
172 /* it's the next argument */
173 precision = va_arg(args, int);
179 /* get the conversion qualifier */
181 if (*fmt == 'l' && *(fmt + 1) == 'l') {
184 } else if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L'
196 while (--field_width > 0)
198 *str++ = (unsigned char) va_arg(args, int);
199 while (--field_width > 0)
204 s = va_arg(args, char *);
208 len = strnlen(s, precision);
211 while (len < field_width--)
213 for (i = 0; i < len; ++i)
215 while (len < field_width--)
220 if (field_width == -1) {
221 field_width = 2*sizeof(void *);
225 (unsigned long) va_arg(args, void *), 16,
226 field_width, precision, flags);
231 if (qualifier == 'l') {
232 long * ip = va_arg(args, long *);
234 } else if (qualifier == 'Z') {
235 size_t * ip = va_arg(args, size_t *);
238 int * ip = va_arg(args, int *);
247 /* integer number formats - set up the flags and "break" */
272 if (qualifier == 'l') {
273 num = va_arg(args, unsigned long);
275 num = (signed long) num;
276 } else if (qualifier == 'q') {
277 num = va_arg(args, unsigned long long);
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);
285 num = (signed short) num;
287 num = va_arg(args, unsigned int);
289 num = (signed int) num;
291 str = number(str, num, base, field_width, precision, flags);
297 int sprintf(char * buf, const char *fmt, ...)
303 i=vsprintf(buf,fmt,args);