| | 1 | /* |
| | 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * The contents of this file constitute Original Code as defined in and |
| | 7 | * are subject to the Apple Public Source License Version 1.1 (the |
| | 8 | * "License"). You may not use this file except in compliance with the |
| | 9 | * License. Please obtain a copy of the License at |
| | 10 | * http://www.apple.com/publicsource and read it before using this file. |
| | 11 | * |
| | 12 | * This Original Code and all software distributed under the License are |
| | 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| | 17 | * License for the specific language governing rights and limitations |
| | 18 | * under the License. |
| | 19 | * |
| | 20 | * @APPLE_LICENSE_HEADER_END@ |
| | 21 | */ |
| | 22 | /* |
| | 23 | * Mach Operating System |
| | 24 | * Copyright (c) 1990 Carnegie-Mellon University |
| | 25 | * Copyright (c) 1989 Carnegie-Mellon University |
| | 26 | * Copyright (c) 1988 Carnegie-Mellon University |
| | 27 | * Copyright (c) 1987 Carnegie-Mellon University |
| | 28 | * All rights reserved. The CMU software License Agreement specifies |
| | 29 | * the terms and conditions for use and redistribution. |
| | 30 | */ |
| | 31 | /* |
| | 32 | * Copyright (c) 1982, 1986 Regents of the University of California. |
| | 33 | * All rights reserved. The Berkeley software License Agreement |
| | 34 | * specifies the terms and conditions for redistribution. |
| | 35 | * |
| | 36 | * @(#)prf.c 7.1 (Berkeley) 6/5/86 |
| | 37 | */ |
| | 38 | /* |
| | 39 | * prf.c - Helpers for the printf function. |
| | 40 | * |
| | 41 | * Copyright (c) 1998-2002 Apple Computer, Inc. |
| | 42 | * |
| | 43 | * DRI: Josh de Cesare |
| | 44 | */ |
| | 45 | |
| | 46 | #include <sys/param.h> |
| | 47 | |
| | 48 | #define SPACE 1 |
| | 49 | #define ZERO 2 |
| | 50 | #define UCASE 16 |
| | 51 | |
| | 52 | /* |
| | 53 | * Scaled down version of C Library printf. |
| | 54 | * Used to print diagnostic information directly on console tty. |
| | 55 | * Since it is not interrupt driven, all system activities are |
| | 56 | * suspended. |
| | 57 | * |
| | 58 | */ |
| | 59 | |
| | 60 | /* |
| | 61 | * Printn prints a number n in base b. |
| | 62 | * We don't use recursion to avoid deep kernel stacks. |
| | 63 | */ |
| | 64 | static void |
| | 65 | printn(n, b, flag, minwidth, putfn_p, putfn_arg) |
| | 66 | u_long n; |
| | 67 | int b, flag, minwidth; |
| | 68 | void (*putfn_p)(); |
| | 69 | void *putfn_arg; |
| | 70 | { |
| | 71 | char prbuf[11]; |
| | 72 | register char *cp; |
| | 73 | int width = 0, neg = 0; |
| | 74 | |
| | 75 | if (b == 10 && (int)n < 0) { |
| | 76 | neg = 1; |
| | 77 | n = (unsigned)(-(int)n); |
| | 78 | } |
| | 79 | cp = prbuf; |
| | 80 | do { |
| | 81 | *cp++ = "0123456789abcdef0123456789ABCDEF"[(flag & UCASE) + n%b]; |
| | 82 | n /= b; |
| | 83 | width++; |
| | 84 | } while (n); |
| | 85 | |
| | 86 | if (neg) { |
| | 87 | (*putfn_p)('-', putfn_arg); |
| | 88 | width++; |
| | 89 | } |
| | 90 | while (width++ < minwidth) |
| | 91 | (*putfn_p)( (flag & ZERO) ? '0' : ' ', putfn_arg); |
| | 92 | |
| | 93 | do |
| | 94 | (*putfn_p)(*--cp, putfn_arg); |
| | 95 | while (cp > prbuf); |
| | 96 | } |
| | 97 | |
| | 98 | void prf( |
| | 99 | const char *fmt, |
| | 100 | unsigned int *adx, |
| | 101 | void (*putfn_p)(), |
| | 102 | void *putfn_arg |
| | 103 | ) |
| | 104 | { |
| | 105 | int b, c; |
| | 106 | char *s; |
| | 107 | int flag = 0, minwidth = 0, width = 0; |
| | 108 | |
| | 109 | loop: |
| | 110 | while ((c = *fmt++) != '%') { |
| | 111 | if(c == '\0') |
| | 112 | return; |
| | 113 | (*putfn_p)(c, putfn_arg); |
| | 114 | } |
| | 115 | again: |
| | 116 | c = *fmt++; |
| | 117 | switch (c) { |
| | 118 | case 'l': |
| | 119 | goto again; |
| | 120 | case ' ': |
| | 121 | flag |= SPACE; |
| | 122 | goto again; |
| | 123 | case '0': |
| | 124 | if (minwidth == 0) { |
| | 125 | /* this is a flag */ |
| | 126 | flag |= ZERO; |
| | 127 | goto again; |
| | 128 | } /* fall through */ |
| | 129 | case '1': |
| | 130 | case '2': |
| | 131 | case '3': |
| | 132 | case '4': |
| | 133 | case '5': |
| | 134 | case '6': |
| | 135 | case '7': |
| | 136 | case '8': |
| | 137 | case '9': |
| | 138 | minwidth *= 10; |
| | 139 | minwidth += c - '0'; |
| | 140 | goto again; |
| | 141 | case 'X': |
| | 142 | flag |= UCASE; |
| | 143 | /* fall through */ |
| | 144 | case 'x': |
| | 145 | b = 16; |
| | 146 | goto number; |
| | 147 | case 'd': |
| | 148 | b = 10; |
| | 149 | goto number; |
| | 150 | case 'o': case 'O': |
| | 151 | b = 8; |
| | 152 | number: |
| | 153 | printn((u_long)*adx, b, flag, minwidth, putfn_p, putfn_arg); |
| | 154 | break; |
| | 155 | case 's': |
| | 156 | s = (char *)*adx; |
| | 157 | while (c = *s++) { |
| | 158 | (*putfn_p)(c, putfn_arg); |
| | 159 | width++; |
| | 160 | } |
| | 161 | while (width++ < minwidth) |
| | 162 | (*putfn_p)(' ', putfn_arg); |
| | 163 | break; |
| | 164 | case 'c': |
| | 165 | (*putfn_p)((char)*adx, putfn_arg); |
| | 166 | break; |
| | 167 | } |
| | 168 | adx++; |
| | 169 | goto loop; |
| | 170 | } |
projects / apple / bootx.git / blame_incremental