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> 36 RCSID("$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 64 static void 65 try_signed(FILE *f, int len) __attribute__ ((unused)); 66 67 static void 68 try_unsigned(FILE *f, int len) __attribute__ ((unused)); 69 70 static int 71 print_bt(FILE *f, int flag) __attribute__ ((unused)); 72 73 static void 74 try_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 86 static void 87 try_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 99 static int 100 print_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 } 110 111 int 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