| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: utils.h,v 1.1 1997/07/21 13:47:42 mdw Exp $ |
| 4 | * |
| 5 | * Miscellaneous useful bits of code. |
| 6 | * |
| 7 | * (c) 1997 Mark Wooding |
| 8 | */ |
| 9 | |
| 10 | /*----- Licencing notice --------------------------------------------------* |
| 11 | * |
| 12 | * This file is part of `become' |
| 13 | * |
| 14 | * `Become' is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License as published by |
| 16 | * the Free Software Foundation; either version 2 of the License, or |
| 17 | * (at your option) any later version. |
| 18 | * |
| 19 | * `Become' is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | * GNU General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU General Public License |
| 25 | * along with `become'; if not, write to the Free Software |
| 26 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 27 | */ |
| 28 | |
| 29 | /*----- Revision history --------------------------------------------------* |
| 30 | * |
| 31 | * $Log: utils.h,v $ |
| 32 | * Revision 1.1 1997/07/21 13:47:42 mdw |
| 33 | * Initial revision |
| 34 | * |
| 35 | */ |
| 36 | |
| 37 | #ifndef UTILS_H |
| 38 | #define UTILS_H |
| 39 | |
| 40 | #ifdef __cplusplus |
| 41 | extern "C" { |
| 42 | #endif |
| 43 | |
| 44 | /*----- Required header files ---------------------------------------------*/ |
| 45 | |
| 46 | #include <stddef.h> |
| 47 | #include <stdlib.h> |
| 48 | |
| 49 | /*----- Storing and retrieving numbers ------------------------------------* |
| 50 | * |
| 51 | * These use big-endian conventions, because they seem more usual in network |
| 52 | * applications. I actually think that little-endian is more sensible... |
| 53 | */ |
| 54 | |
| 55 | #define load32(p) \ |
| 56 | ((((unsigned char)(p)[0] & 0xFF) << 24) | \ |
| 57 | (((unsigned char)(p)[1] & 0xFF) << 16) | \ |
| 58 | (((unsigned char)(p)[2] & 0xFF) << 8) | \ |
| 59 | (((unsigned char)(p)[3] & 0xFF) << 0)) |
| 60 | |
| 61 | #define store32(p, v) \ |
| 62 | ((p)[0] = ((unsigned long)(v) >> 24) & 0xFF, \ |
| 63 | (p)[1] = ((unsigned long)(v) >> 16) & 0xFF, \ |
| 64 | (p)[2] = ((unsigned long)(v) >> 8) & 0xFF, \ |
| 65 | (p)[3] = ((unsigned long)(v) >> 0) & 0xFF) |
| 66 | |
| 67 | /* --- Little-endian versions (for MD5) --- */ |
| 68 | |
| 69 | #define load32_l(p) \ |
| 70 | ((((unsigned char)(p)[0] & 0xFF) << 0) | \ |
| 71 | (((unsigned char)(p)[1] & 0xFF) << 8) | \ |
| 72 | (((unsigned char)(p)[2] & 0xFF) << 16) | \ |
| 73 | (((unsigned char)(p)[3] & 0xFF) << 24)) |
| 74 | |
| 75 | #define store32_l(p, v) \ |
| 76 | ((p)[0] = ((unsigned long)(v) >> 0) & 0xFF, \ |
| 77 | (p)[1] = ((unsigned long)(v) >> 8) & 0xFF, \ |
| 78 | (p)[2] = ((unsigned long)(v) >> 16) & 0xFF, \ |
| 79 | (p)[3] = ((unsigned long)(v) >> 24) & 0xFF) |
| 80 | |
| 81 | /*----- Program name handling ---------------------------------------------*/ |
| 82 | |
| 83 | /* --- @quis@ --- * |
| 84 | * |
| 85 | * Arguments: --- |
| 86 | * |
| 87 | * Returns: Pointer to the program name. |
| 88 | * |
| 89 | * Use: Returns the program name. |
| 90 | */ |
| 91 | |
| 92 | extern const char *quis(void); |
| 93 | |
| 94 | /* --- @ego@ --- * |
| 95 | * |
| 96 | * Arguments: @const char *p@ = pointer to program name |
| 97 | * |
| 98 | * Returns: --- |
| 99 | * |
| 100 | * Use: Tells the utils library what the program's name is. |
| 101 | */ |
| 102 | |
| 103 | extern void ego(const char */*p*/); |
| 104 | |
| 105 | /*----- Error reporting ---------------------------------------------------*/ |
| 106 | |
| 107 | /* --- @moan@ --- * |
| 108 | * |
| 109 | * Arguments: @const char *f@ = a @printf@-style format string |
| 110 | * @...@ = other arguments |
| 111 | * |
| 112 | * Returns: --- |
| 113 | * |
| 114 | * Use: Reports an error. |
| 115 | */ |
| 116 | |
| 117 | extern void moan(const char */*f*/, ...); |
| 118 | |
| 119 | /* --- @die@ --- * |
| 120 | * |
| 121 | * Arguments: @const char *f@ = a @printf@-style format string |
| 122 | * @...@ = other arguments |
| 123 | * |
| 124 | * Returns: Never. |
| 125 | * |
| 126 | * Use: Reports an error and hari-kiris. Like @moan@ above, only |
| 127 | * more permanent. |
| 128 | */ |
| 129 | |
| 130 | extern void die(const char */*f*/, ...); |
| 131 | |
| 132 | /*----- Memory management functions ---------------------------------------*/ |
| 133 | |
| 134 | /* --- @xmalloc@ --- * |
| 135 | * |
| 136 | * Arguments: @size_t sz@ = size of block to allocate |
| 137 | * |
| 138 | * Returns: Pointer to allocated block. |
| 139 | * |
| 140 | * Use: Allocates memory. If the memory isn't available, we don't |
| 141 | * hang aroung long enough for a normal function return. |
| 142 | */ |
| 143 | |
| 144 | extern void *xmalloc(size_t /*sz*/); |
| 145 | |
| 146 | /* --- @xstrdup@ --- * |
| 147 | * |
| 148 | * Arguments: @const char *s@ = pointer to a string |
| 149 | * |
| 150 | * Returns: Pointer to a copy of the string. |
| 151 | * |
| 152 | * Use: Copies a string (like @strdup@ would, if it existed). |
| 153 | */ |
| 154 | |
| 155 | extern char *xstrdup(const char */*s*/); |
| 156 | |
| 157 | /* --- @xrealloc@ --- * |
| 158 | * |
| 159 | * Arguments: @void *p@ = pointer to a block of memory |
| 160 | * @size_t sz@ = new size desired for the block |
| 161 | * |
| 162 | * Returns: Pointer to the resized memory block (which is almost |
| 163 | * certainly not in the same place any more). |
| 164 | * |
| 165 | * Use: Resizes a memory block. |
| 166 | */ |
| 167 | |
| 168 | extern void *xrealloc(void */*p*/, size_t /*sz*/); |
| 169 | |
| 170 | /*----- That's all, folks -------------------------------------------------*/ |
| 171 | |
| 172 | #ifdef __cplusplus |
| 173 | } |
| 174 | #endif |
| 175 | |
| 176 | #endif |