1 /* $NetBSD: printf.c,v 1.13 1998/06/16 19:10:15 gwr Exp $ */ 2 3 /*- 4 * Copyright (c) 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)printf.c 8.1 (Berkeley) 6/11/93 36 */ 37 38 /* 39 * Scaled down version of printf(3). 40 * 41 * One additional format: 42 * 43 * The format %b is supported to decode error registers. 44 * Its usage is: 45 * 46 * printf("reg=%b\n", regval, "<base><arg>*"); 47 * 48 * where <base> is the output base expressed as a control character, e.g. 49 * \10 gives octal; \20 gives hex. Each arg is a sequence of characters, 50 * the first of which gives the bit number to be inspected (origin 1), and 51 * the next characters (up to a control character, i.e. a character <= 32), 52 * give the name of the register. Thus: 53 * 54 * printf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n"); 55 * 56 * would produce output: 57 * 58 * reg=3<BITTWO,BITONE> 59 */ 60 61 #include <sys/cdefs.h> 62 #include <sys/types.h> 63 #ifdef __STDC__ 64 #include <machine/stdarg.h> 65 #else 66 #include <machine/varargs.h> 67 #endif 68 69 #include "stand.h" 70 71 static void kprintn __P((void (*)(int), u_long, int)); 72 static void sputchar __P((int)); 73 static void kdoprnt __P((void (*)(int), const char *, va_list)); 74 75 static char *sbuf; 76 77 static void 78 sputchar(c) 79 int c; 80 { 81 *sbuf++ = c; 82 } 83 84 void 85 #ifdef __STDC__ 86 sprintf(char *buf, const char *fmt, ...) 87 #else 88 sprintf(buf, fmt, va_alist) 89 char *buf, *fmt; 90 #endif 91 { 92 va_list ap; 93 94 sbuf = buf; 95 #ifdef __STDC__ 96 va_start(ap, fmt); 97 #else 98 va_start(ap); 99 #endif 100 kdoprnt(sputchar, fmt, ap); 101 va_end(ap); 102 *sbuf = '\0'; 103 } 104 105 void 106 #ifdef __STDC__ 107 printf(const char *fmt, ...) 108 #else 109 printf(fmt, va_alist) 110 char *fmt; 111 #endif 112 { 113 va_list ap; 114 115 #ifdef __STDC__ 116 va_start(ap, fmt); 117 #else 118 va_start(ap); 119 #endif 120 kdoprnt(putchar, fmt, ap); 121 va_end(ap); 122 } 123 124 void 125 vprintf(const char *fmt, va_list ap) 126 { 127 kdoprnt(putchar, fmt, ap); 128 } 129 130 void 131 kdoprnt(put, fmt, ap) 132 void (*put)__P((int)); 133 const char *fmt; 134 va_list ap; 135 { 136 register char *p; 137 register int ch, n; 138 unsigned long ul; 139 int lflag, set; 140 141 for (;;) { 142 while ((ch = *fmt++) != '%') { 143 if (ch == '\0') 144 return; 145 put(ch); 146 } 147 lflag = 0; 148 reswitch: switch (ch = *fmt++) { 149 case '\0': 150 /* XXX print the last format character? */ 151 return; 152 case 'l': 153 lflag = 1; 154 goto reswitch; 155 case 'b': 156 ul = va_arg(ap, int); 157 p = va_arg(ap, char *); 158 kprintn(put, ul, *p++); 159 160 if (!ul) 161 break; 162 163 for (set = 0; (n = *p++);) { 164 if (ul & (1 << (n - 1))) { 165 put(set ? ',' : '<'); 166 for (; (n = *p) > ' '; ++p) 167 put(n); 168 set = 1; 169 } else 170 for (; *p > ' '; ++p); 171 } 172 if (set) 173 put('>'); 174 break; 175 case 'c': 176 ch = va_arg(ap, int); 177 put(ch & 0x7f); 178 break; 179 case 's': 180 p = va_arg(ap, char *); 181 while ((ch = *p++)) 182 put(ch); 183 break; 184 case 'd': 185 ul = lflag ? 186 va_arg(ap, long) : va_arg(ap, int); 187 if ((long)ul < 0) { 188 put('-'); 189 ul = -(long)ul; 190 } 191 kprintn(put, ul, 10); 192 break; 193 case 'o': 194 ul = lflag ? 195 va_arg(ap, u_long) : va_arg(ap, u_int); 196 kprintn(put, ul, 8); 197 break; 198 case 'u': 199 ul = lflag ? 200 va_arg(ap, u_long) : va_arg(ap, u_int); 201 kprintn(put, ul, 10); 202 break; 203 case 'p': 204 put('0'); 205 put('x'); 206 /* fall through */ 207 case 'x': 208 ul = lflag ? 209 va_arg(ap, u_long) : va_arg(ap, u_int); 210 kprintn(put, ul, 16); 211 break; 212 default: 213 put('%'); 214 if (lflag) 215 put('l'); 216 put(ch); 217 } 218 } 219 va_end(ap); 220 } 221 222 static void 223 kprintn(put, ul, base) 224 void (*put)__P((int)); 225 unsigned long ul; 226 int base; 227 { 228 /* hold a long in base 8 */ 229 char *p, buf[(sizeof(long) * NBBY / 3) + 1]; 230 231 p = buf; 232 do { 233 *p++ = "0123456789abcdef"[ul % base]; 234 } while (ul /= base); 235 do { 236 put(*--p); 237 } while (p > buf); 238 } 239 240 void 241 twiddle() 242 { 243 static int pos; 244 245 putchar("|/-\\"[pos++ & 3]); 246 putchar('\b'); 247 } 248