bits.c revision 72445
1/* 2 * Copyright (c) 1997 - 2000 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifdef HAVE_CONFIG_H 35#include <config.h> 36RCSID("$Id: bits.c,v 1.18 2000/08/27 05:42:46 assar Exp $"); 37#endif 38#include <stdio.h> 39#include <string.h> 40#include <stdlib.h> 41#include <ctype.h> 42 43#define BITSIZE(TYPE) \ 44{ \ 45 int b = 0; TYPE x = 1, zero = 0; char *pre = "u"; \ 46 char tmp[128], tmp2[128]; \ 47 while(x){ x <<= 1; b++; if(x < zero) pre=""; } \ 48 if(b >= len){ \ 49 int tabs; \ 50 sprintf(tmp, "%sint%d_t" , pre, len); \ 51 sprintf(tmp2, "typedef %s %s;", #TYPE, tmp); \ 52 tabs = 5 - strlen(tmp2) / 8; \ 53 fprintf(f, "%s", tmp2); \ 54 while(tabs-- > 0) fprintf(f, "\t"); \ 55 fprintf(f, "/* %2d bits */\n", b); \ 56 return; \ 57 } \ 58} 59 60#ifndef HAVE___ATTRIBUTE__ 61#define __attribute__(x) 62#endif 63 64static void 65try_signed(FILE *f, int len) __attribute__ ((unused)); 66 67static void 68try_unsigned(FILE *f, int len) __attribute__ ((unused)); 69 70static int 71print_bt(FILE *f, int flag) __attribute__ ((unused)); 72 73static void 74try_signed(FILE *f, int len) 75{ 76 BITSIZE(signed char); 77 BITSIZE(short); 78 BITSIZE(int); 79 BITSIZE(long); 80#ifdef HAVE_LONG_LONG 81 BITSIZE(long long); 82#endif 83 fprintf(f, "/* There is no %d bit type */\n", len); 84} 85 86static void 87try_unsigned(FILE *f, int len) 88{ 89 BITSIZE(unsigned char); 90 BITSIZE(unsigned short); 91 BITSIZE(unsigned int); 92 BITSIZE(unsigned long); 93#ifdef HAVE_LONG_LONG 94 BITSIZE(unsigned long long); 95#endif 96 fprintf(f, "/* There is no %d bit type */\n", len); 97} 98 99static int 100print_bt(FILE *f, int flag) 101{ 102 if(flag == 0){ 103 fprintf(f, "/* For compatibility with various type definitions */\n"); 104 fprintf(f, "#ifndef __BIT_TYPES_DEFINED__\n"); 105 fprintf(f, "#define __BIT_TYPES_DEFINED__\n"); 106 fprintf(f, "\n"); 107 } 108 return 1; 109} 110 111int main(int argc, char **argv) 112{ 113 FILE *f; 114 int flag; 115 char *fn, *hb; 116 117 if(argc < 2){ 118 fn = "bits.h"; 119 hb = "__BITS_H__"; 120 f = stdout; 121 } else { 122 char *p; 123 fn = argv[1]; 124 hb = malloc(strlen(fn) + 5); 125 sprintf(hb, "__%s__", fn); 126 for(p = hb; *p; p++){ 127 if(!isalnum((unsigned char)*p)) 128 *p = '_'; 129 } 130 f = fopen(argv[1], "w"); 131 } 132 fprintf(f, "/* %s -- this file was generated for %s by\n", fn, HOST); 133 fprintf(f, " %*s %s */\n\n", (int)strlen(fn), "", 134 "$Id: bits.c,v 1.18 2000/08/27 05:42:46 assar Exp $"); 135 fprintf(f, "#ifndef %s\n", hb); 136 fprintf(f, "#define %s\n", hb); 137 fprintf(f, "\n"); 138#ifdef HAVE_SYS_TYPES_H 139 fprintf(f, "#include <sys/types.h>\n"); 140#endif 141#ifdef HAVE_INTTYPES_H 142 fprintf(f, "#include <inttypes.h>\n"); 143#endif 144#ifdef HAVE_SYS_BITYPES_H 145 fprintf(f, "#include <sys/bitypes.h>\n"); 146#endif 147#ifdef HAVE_BIND_BITYPES_H 148 fprintf(f, "#include <bind/bitypes.h>\n"); 149#endif 150#ifdef HAVE_NETINET_IN6_MACHTYPES_H 151 fprintf(f, "#include <netinet/in6_machtypes.h>\n"); 152#endif 153 fprintf(f, "\n"); 154 155 flag = 0; 156#ifndef HAVE_INT8_T 157 flag = print_bt(f, flag); 158 try_signed (f, 8); 159#endif /* HAVE_INT8_T */ 160#ifndef HAVE_INT16_T 161 flag = print_bt(f, flag); 162 try_signed (f, 16); 163#endif /* HAVE_INT16_T */ 164#ifndef HAVE_INT32_T 165 flag = print_bt(f, flag); 166 try_signed (f, 32); 167#endif /* HAVE_INT32_T */ 168#if 0 169#ifndef HAVE_INT64_T 170 flag = print_bt(f, flag); 171 try_signed (f, 64); 172#endif /* HAVE_INT64_T */ 173#endif 174 175#ifndef HAVE_UINT8_T 176 flag = print_bt(f, flag); 177 try_unsigned (f, 8); 178#endif /* HAVE_UINT8_T */ 179#ifndef HAVE_UINT16_T 180 flag = print_bt(f, flag); 181 try_unsigned (f, 16); 182#endif /* HAVE_UINT16_T */ 183#ifndef HAVE_UINT32_T 184 flag = print_bt(f, flag); 185 try_unsigned (f, 32); 186#endif /* HAVE_UINT32_T */ 187#if 0 188#ifndef HAVE_UINT64_T 189 flag = print_bt(f, flag); 190 try_unsigned (f, 64); 191#endif /* HAVE_UINT64_T */ 192#endif 193 194#define X(S) fprintf(f, "typedef uint" #S "_t u_int" #S "_t;\n") 195#ifndef HAVE_U_INT8_T 196 flag = print_bt(f, flag); 197 X(8); 198#endif /* HAVE_U_INT8_T */ 199#ifndef HAVE_U_INT16_T 200 flag = print_bt(f, flag); 201 X(16); 202#endif /* HAVE_U_INT16_T */ 203#ifndef HAVE_U_INT32_T 204 flag = print_bt(f, flag); 205 X(32); 206#endif /* HAVE_U_INT32_T */ 207#if 0 208#ifndef HAVE_U_INT64_T 209 flag = print_bt(f, flag); 210 X(64); 211#endif /* HAVE_U_INT64_T */ 212#endif 213 214 if(flag){ 215 fprintf(f, "\n"); 216 fprintf(f, "#endif /* __BIT_TYPES_DEFINED__ */\n\n"); 217 } 218 fprintf(f, "#endif /* %s */\n", hb); 219 return 0; 220} 221