| 1 | /* |
| 2 | * ========== Copyright Header Begin ========================================== |
| 3 | * |
| 4 | * Hypervisor Software File: prom_printf.c |
| 5 | * |
| 6 | * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. |
| 7 | * |
| 8 | * - Do no alter or remove copyright notices |
| 9 | * |
| 10 | * - Redistribution and use of this software in source and binary forms, with |
| 11 | * or without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistribution of source code must retain the above copyright notice, |
| 15 | * this list of conditions and the following disclaimer. |
| 16 | * |
| 17 | * - Redistribution in binary form must reproduce the above copyright notice, |
| 18 | * this list of conditions and the following disclaimer in the |
| 19 | * documentation and/or other materials provided with the distribution. |
| 20 | * |
| 21 | * Neither the name of Sun Microsystems, Inc. or the names of contributors |
| 22 | * may be used to endorse or promote products derived from this software |
| 23 | * without specific prior written permission. |
| 24 | * |
| 25 | * This software is provided "AS IS," without a warranty of any kind. |
| 26 | * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, |
| 27 | * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A |
| 28 | * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN |
| 29 | * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR |
| 30 | * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR |
| 31 | * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN |
| 32 | * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR |
| 33 | * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE |
| 34 | * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, |
| 35 | * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF |
| 36 | * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. |
| 37 | * |
| 38 | * You acknowledge that this software is not designed, licensed or |
| 39 | * intended for use in the design, construction, operation or maintenance of |
| 40 | * any nuclear facility. |
| 41 | * |
| 42 | * ========== Copyright Header End ============================================ |
| 43 | */ |
| 44 | /* |
| 45 | * Copyright (c) 2000-2003 Sun Microsystems, Inc. |
| 46 | * All rights reserved. |
| 47 | * Use is subject to license terms. |
| 48 | */ |
| 49 | |
| 50 | #pragma ident "@(#)prom_printf.c 1.1 00/08/07 SMI" |
| 51 | |
| 52 | #include <sys/promif.h> |
| 53 | #include <sys/promimpl.h> |
| 54 | #include <sys/varargs.h> |
| 55 | |
| 56 | static void _doprint(const char *, va_list, char **); |
| 57 | static void _printn(uint64_t, int, int, int, char **); |
| 58 | |
| 59 | /* |
| 60 | * Emit character functions... |
| 61 | */ |
| 62 | |
| 63 | static void |
| 64 | _pput_flush(char *start, char *end) |
| 65 | { |
| 66 | while (prom_write(prom_stdout_ihandle(), start, end - start) == -1) |
| 67 | ; |
| 68 | } |
| 69 | |
| 70 | static void |
| 71 | _sput(char c, char **p) |
| 72 | { |
| 73 | **p = c; |
| 74 | *p += 1; |
| 75 | } |
| 76 | |
| 77 | /*VARARGS1*/ |
| 78 | void |
| 79 | prom_printf(const char *fmt, ...) |
| 80 | { |
| 81 | va_list adx; |
| 82 | |
| 83 | va_start(adx, fmt); |
| 84 | _doprint(fmt, adx, (char **)0); |
| 85 | va_end(adx); |
| 86 | } |
| 87 | |
| 88 | void |
| 89 | prom_vprintf(const char *fmt, va_list adx) |
| 90 | { |
| 91 | _doprint(fmt, adx, (char **)0); |
| 92 | } |
| 93 | |
| 94 | /*VARARGS2*/ |
| 95 | char * |
| 96 | prom_sprintf(char *s, const char *fmt, ...) |
| 97 | { |
| 98 | char *bp = s; |
| 99 | va_list adx; |
| 100 | |
| 101 | va_start(adx, fmt); |
| 102 | _doprint(fmt, adx, &bp); |
| 103 | *bp++ = (char)0; |
| 104 | va_end(adx); |
| 105 | return (s); |
| 106 | } |
| 107 | |
| 108 | char * |
| 109 | prom_vsprintf(char *s, const char *fmt, va_list adx) |
| 110 | { |
| 111 | char *bp = s; |
| 112 | |
| 113 | _doprint(fmt, adx, &bp); |
| 114 | *bp++ = (char)0; |
| 115 | return (s); |
| 116 | } |
| 117 | |
| 118 | static void |
| 119 | _doprint(const char *fmt, va_list adx, char **bp) |
| 120 | { |
| 121 | int32_t b, c, i, pad, width, ells; |
| 122 | char *s, *start; |
| 123 | char localbuf[100], *lbp; |
| 124 | int64_t l; |
| 125 | uint64_t ul; |
| 126 | |
| 127 | if (bp == 0) { |
| 128 | bp = &lbp; |
| 129 | lbp = &localbuf[0]; |
| 130 | } |
| 131 | start = *bp; |
| 132 | loop: |
| 133 | width = 0; |
| 134 | while ((c = *fmt++) != '%') { |
| 135 | if (c == '\0') |
| 136 | goto out; |
| 137 | if (c == '\n') { |
| 138 | _sput('\r', bp); |
| 139 | _sput('\n', bp); |
| 140 | if (start == localbuf) { |
| 141 | _pput_flush(start, *bp); |
| 142 | lbp = &localbuf[0]; |
| 143 | } |
| 144 | } else |
| 145 | _sput((char)c, bp); |
| 146 | if (start == localbuf && (*bp - start > 80)) { |
| 147 | _pput_flush(start, *bp); |
| 148 | lbp = &localbuf[0]; |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | c = *fmt++; |
| 153 | for (pad = ' '; c == '0'; c = *fmt++) |
| 154 | pad = '0'; |
| 155 | |
| 156 | for (width = 0; c >= '0' && c <= '9'; c = *fmt++) |
| 157 | width = width * 10 + c - '0'; |
| 158 | |
| 159 | for (ells = 0; c == 'l'; c = *fmt++) |
| 160 | ells++; |
| 161 | |
| 162 | switch (c) { |
| 163 | case 'i': |
| 164 | case 'd': |
| 165 | case 'D': |
| 166 | b = 10; |
| 167 | if (ells == 0) |
| 168 | l = (int64_t)va_arg(adx, int); |
| 169 | else if (ells == 1) |
| 170 | l = (int64_t)va_arg(adx, int64_t); |
| 171 | else |
| 172 | l = (int64_t)va_arg(adx, int64_t); |
| 173 | if (l < 0) { |
| 174 | _sput('-', bp); |
| 175 | width--; |
| 176 | ul = -l; |
| 177 | } else |
| 178 | ul = l; |
| 179 | goto number; |
| 180 | |
| 181 | case 'p': |
| 182 | ells = 1; |
| 183 | /*FALLTHROUGH*/ |
| 184 | case 'x': |
| 185 | case 'X': |
| 186 | b = 16; |
| 187 | goto u_number; |
| 188 | |
| 189 | case 'u': |
| 190 | b = 10; |
| 191 | goto u_number; |
| 192 | |
| 193 | case 'o': |
| 194 | case 'O': |
| 195 | b = 8; |
| 196 | u_number: |
| 197 | if (ells == 0) |
| 198 | ul = (uint64_t)va_arg(adx, uint32_t); |
| 199 | else if (ells == 1) |
| 200 | ul = (uint64_t)va_arg(adx, uint64_t); |
| 201 | else |
| 202 | ul = (uint64_t)va_arg(adx, uint64_t); |
| 203 | number: |
| 204 | _printn(ul, b, width, pad, bp); |
| 205 | break; |
| 206 | |
| 207 | case 'c': |
| 208 | b = va_arg(adx, int); |
| 209 | for (i = 24; i >= 0; i -= 8) |
| 210 | if ((c = ((b >> i) & 0x7f)) != 0) { |
| 211 | if (c == '\n') |
| 212 | _sput('\r', bp); |
| 213 | _sput((char)c, bp); |
| 214 | } |
| 215 | break; |
| 216 | |
| 217 | case 's': |
| 218 | s = va_arg(adx, char *); |
| 219 | while ((c = *s++) != 0) { |
| 220 | if (c == '\n') |
| 221 | _sput('\r', bp); |
| 222 | _sput((char)c, bp); |
| 223 | if (start == localbuf && (*bp - start > 80)) { |
| 224 | _pput_flush(start, *bp); |
| 225 | lbp = &localbuf[0]; |
| 226 | } |
| 227 | } |
| 228 | break; |
| 229 | |
| 230 | case '%': |
| 231 | _sput('%', bp); |
| 232 | break; |
| 233 | } |
| 234 | if (start == localbuf && (*bp - start > 80)) { |
| 235 | _pput_flush(start, *bp); |
| 236 | lbp = &localbuf[0]; |
| 237 | } |
| 238 | goto loop; |
| 239 | out: |
| 240 | if (start == localbuf && (*bp - start > 0)) |
| 241 | _pput_flush(start, *bp); |
| 242 | } |
| 243 | |
| 244 | /* |
| 245 | * Printn prints a number n in base b. |
| 246 | * We don't use recursion to avoid deep kernel stacks. |
| 247 | */ |
| 248 | static void |
| 249 | _printn(uint64_t n, int32_t b, int32_t width, int32_t pad, char **bp) |
| 250 | { |
| 251 | char prbuf[40]; |
| 252 | char *cp; |
| 253 | |
| 254 | cp = prbuf; |
| 255 | do { |
| 256 | *cp++ = "0123456789abcdef"[n%b]; |
| 257 | n /= b; |
| 258 | width--; |
| 259 | } while (n); |
| 260 | while (width-- > 0) |
| 261 | *cp++ = (char)pad; |
| 262 | do { |
| 263 | _sput(*--cp, bp); |
| 264 | } while (cp > prbuf); |
| 265 | } |