include/bits.c

   1 /*
   2  * Copyright (c) 1997-2002 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Portions Copyright (c) 2010 Apple Inc. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #ifdef HAVE_CONFIG_H
  37 #include <config.h>
  38 RCSID("$Id$");
  39 #endif
  40 #include <stdio.h>
  41 #include <string.h>
  42 #include <stdlib.h>
  43 #include <ctype.h>
  44 #ifdef WIN32
  45 #include <winsock2.h>
  46 #include <ws2tcpip.h>
  47 #endif
  48
  49 #define BITSIZE(TYPE)                                           \
  50 {                                                               \
  51     int b = 0; TYPE x = 1, zero = 0; const char *pre = "u";     \
  52     char tmp[128], tmp2[128];                                   \
  53     while(x){ x <<= 1; b++; if(x < zero) pre=""; }              \
  54     if(b >= len){                                               \
  55         size_t tabs;                                            \
  56         sprintf(tmp, "%sint%d_t" , pre, len);                   \
  57         sprintf(tmp2, "typedef %s %s;", #TYPE, tmp);            \
  58         tabs = 5 - strlen(tmp2) / 8;                            \
  59         fprintf(f, "%s", tmp2);                                 \
  60         while(tabs-- > 0) fprintf(f, "\t");                     \
  61         fprintf(f, "/* %2d bits */\n", b);                      \
  62         return;                                                 \
  63     }                                                           \
  64 }
  65
  66 #ifndef HAVE___ATTRIBUTE__
  67 #define __attribute__(x)
  68 #endif
  69
  70 static void
  71 try_signed(FILE *f, int len)  __attribute__ ((unused));
  72
  73 static void
  74 try_unsigned(FILE *f, int len) __attribute__ ((unused));
  75
  76 static int
  77 print_bt(FILE *f, int flag) __attribute__ ((unused));
  78
  79 static void
  80 try_signed(FILE *f, int len)
  81 {
  82     BITSIZE(signed char);
  83     BITSIZE(short);
  84     BITSIZE(int);
  85     BITSIZE(long);
  86 #ifdef HAVE_LONG_LONG
  87     BITSIZE(long long);
  88 #endif
  89     fprintf(f, "/* There is no %d bit type */\n", len);
  90 }
  91
  92 static void
  93 try_unsigned(FILE *f, int len)
  94 {
  95     BITSIZE(unsigned char);
  96     BITSIZE(unsigned short);
  97     BITSIZE(unsigned int);
  98     BITSIZE(unsigned long);
  99 #ifdef HAVE_LONG_LONG
 100     BITSIZE(unsigned long long);
 101 #endif
 102     fprintf(f, "/* There is no %d bit type */\n", len);
 103 }
 104
 105 static int
 106 print_bt(FILE *f, int flag)
 107 {
 108     if(flag == 0){
 109         fprintf(f, "/* For compatibility with various type definitions */\n");
 110         fprintf(f, "#ifndef __BIT_TYPES_DEFINED__\n");
 111         fprintf(f, "#define __BIT_TYPES_DEFINED__\n");
 112         fprintf(f, "\n");
 113     }
 114     return 1;
 115 }
 116
 117 int main(int argc, char **argv)
 118 {
 119     FILE *f;
 120     int flag;
 121     const char *fn, *hb;
 122
 123     if (argc > 1 && strcmp(argv[1], "--version") == 0) {
 124         printf("some version");
 125         return 0;
 126     }
 127
 128     if(argc < 2){
 129         fn = "bits.h";
 130         hb = "__BITS_H__";
 131         f = stdout;
 132     } else {
 133         char *p;
 134         fn = argv[1];
 135         p = malloc(strlen(fn) + 5);
 136         sprintf(p, "__%s__", fn);
 137         hb = p;
 138         for(; *p; p++){
 139             if(!isalnum((unsigned char)*p))
 140                 *p = '_';
 141         }
 142         f = fopen(argv[1], "w");
 143     }
 144     fprintf(f, "/* %s -- this file was generated for %s by\n", fn, HOST);
 145     fprintf(f, "   %*s    %s */\n\n", (int)strlen(fn), "",
 146             "$Id$");
 147     fprintf(f, "#ifndef %s\n", hb);
 148     fprintf(f, "#define %s\n", hb);
 149     fprintf(f, "\n");
 150 #ifdef HAVE_INTTYPES_H
 151     fprintf(f, "#include <inttypes.h>\n");
 152 #endif
 153 #ifdef HAVE_SYS_TYPES_H
 154     fprintf(f, "#include <sys/types.h>\n");
 155 #endif
 156 #ifdef HAVE_SYS_BITYPES_H
 157     fprintf(f, "#include <sys/bitypes.h>\n");
 158 #endif
 159 #ifdef HAVE_BIND_BITYPES_H
 160     fprintf(f, "#include <bind/bitypes.h>\n");
 161 #endif
 162 #ifdef HAVE_NETINET_IN6_MACHTYPES_H
 163     fprintf(f, "#include <netinet/in6_machtypes.h>\n");
 164 #endif
 165 #ifdef HAVE_SOCKLEN_T
 166 #ifndef WIN32
 167     fprintf(f, "#include <sys/socket.h>\n");
 168 #else
 169     fprintf(f, "#include <winsock2.h>\n");
 170     fprintf(f, "#include <ws2tcpip.h>\n");
 171 #endif
 172 #endif
 173     fprintf(f, "\n");
 174
 175     flag = 0;
 176 #ifndef HAVE_INT8_T
 177     flag = print_bt(f, flag);
 178     try_signed (f, 8);
 179 #endif /* HAVE_INT8_T */
 180 #ifndef HAVE_INT16_T
 181     flag = print_bt(f, flag);
 182     try_signed (f, 16);
 183 #endif /* HAVE_INT16_T */
 184 #ifndef HAVE_INT32_T
 185     flag = print_bt(f, flag);
 186     try_signed (f, 32);
 187 #endif /* HAVE_INT32_T */
 188 #ifndef HAVE_INT64_T
 189     flag = print_bt(f, flag);
 190     try_signed (f, 64);
 191 #endif /* HAVE_INT64_T */
 192
 193 #ifndef HAVE_UINT8_T
 194     flag = print_bt(f, flag);
 195     try_unsigned (f, 8);
 196 #endif /* HAVE_UINT8_T */
 197 #ifndef HAVE_UINT16_T
 198     flag = print_bt(f, flag);
 199     try_unsigned (f, 16);
 200 #endif /* HAVE_UINT16_T */
 201 #ifndef HAVE_UINT32_T
 202     flag = print_bt(f, flag);
 203     try_unsigned (f, 32);
 204 #endif /* HAVE_UINT32_T */
 205 #ifndef HAVE_UINT64_T
 206     flag = print_bt(f, flag);
 207     try_unsigned (f, 64);
 208 #endif /* HAVE_UINT64_T */
 209
 210 #define X(S) fprintf(f, "typedef uint" #S "_t u_int" #S "_t;\n")
 211 #ifndef HAVE_U_INT8_T
 212     flag = print_bt(f, flag);
 213     X(8);
 214 #endif /* HAVE_U_INT8_T */
 215 #ifndef HAVE_U_INT16_T
 216     flag = print_bt(f, flag);
 217     X(16);
 218 #endif /* HAVE_U_INT16_T */
 219 #ifndef HAVE_U_INT32_T
 220     flag = print_bt(f, flag);
 221     X(32);
 222 #endif /* HAVE_U_INT32_T */
 223 #ifndef HAVE_U_INT64_T
 224     flag = print_bt(f, flag);
 225     X(64);
 226 #endif /* HAVE_U_INT64_T */
 227
 228     if(flag){
 229         fprintf(f, "\n");
 230         fprintf(f, "#endif /* __BIT_TYPES_DEFINED__ */\n\n");
 231     }
 232 #ifdef KRB5
 233     fprintf(f, "\n");
 234 #if defined(HAVE_SOCKLEN_T)
 235     fprintf(f, "typedef socklen_t krb5_socklen_t;\n");
 236 #else
 237     fprintf(f, "typedef int krb5_socklen_t;\n");
 238 #endif
 239 #if defined(HAVE_SSIZE_T)
 240 #ifdef HAVE_UNISTD_H
 241     fprintf(f, "#include <unistd.h>\n");
 242 #endif
 243     fprintf(f, "typedef ssize_t krb5_ssize_t;\n");
 244 #else
 245     fprintf(f, "typedef int krb5_ssize_t;\n");
 246 #endif
 247     fprintf(f, "\n");
 248
 249 #if defined(_WIN32)
 250     fprintf(f, "typedef SOCKET krb5_socket_t;\n");
 251 #else
 252     fprintf(f, "typedef int krb5_socket_t;\n");
 253 #endif
 254     fprintf(f, "\n");
 255
 256 #endif /* KRB5 */
 257
 258     fprintf(f, "#if !defined(__has_extension)\n");
 259     fprintf(f, "#define __has_extension(x) 0\n");
 260     fprintf(f, "#endif\n\n");
 261
 262     fprintf(f, "#ifndef KRB5TYPES_REQUIRE_GNUC\n");
 263     fprintf(f, "#define KRB5TYPES_REQUIRE_GNUC(m,n,p) \\\n");
 264     fprintf(f, "    (((__GNUC__ * 10000) + (__GNUC_MINOR__ * 100) + __GNUC_PATCHLEVEL__) >= \\\n");
 265     fprintf(f, "     (((m) * 10000) + ((n) * 100) + (p)))\n");
 266     fprintf(f, "#endif\n\n");
 267
 268     fprintf(f, "#ifndef HEIMDAL_DEPRECATED\n");
 269     fprintf(f, "#if __has_extension(deprecated) || KRB5TYPES_REQUIRE_GNUC(3,1,0)\n");
 270     fprintf(f, "#define HEIMDAL_DEPRECATED __attribute__((deprecated))\n");
 271     fprintf(f, "#elif defined(_MSC_VER) && (_MSC_VER>1200)\n");
 272     fprintf(f, "#define HEIMDAL_DEPRECATED __declspec(deprecated)\n");
 273     fprintf(f, "#else\n");
 274     fprintf(f, "#define HEIMDAL_DEPRECATED\n");
 275     fprintf(f, "#endif\n");
 276     fprintf(f, "#endif\n\n");
 277
 278     fprintf(f, "#ifndef HEIMDAL_PRINTF_ATTRIBUTE\n");
 279     fprintf(f, "#if __has_extension(format) || KRB5TYPES_REQUIRE_GNUC(3,1,0)\n");
 280     fprintf(f, "#define HEIMDAL_PRINTF_ATTRIBUTE(x) __attribute__((format x))\n");
 281     fprintf(f, "#else\n");
 282     fprintf(f, "#define HEIMDAL_PRINTF_ATTRIBUTE(x)\n");
 283     fprintf(f, "#endif\n");
 284     fprintf(f, "#endif\n\n");
 285
 286     fprintf(f, "#ifndef HEIMDAL_NORETURN_ATTRIBUTE\n");
 287     fprintf(f, "#if __has_extension(noreturn) || KRB5TYPES_REQUIRE_GNUC(3,1,0)\n");
 288     fprintf(f, "#define HEIMDAL_NORETURN_ATTRIBUTE __attribute__((noreturn))\n");
 289     fprintf(f, "#else\n");
 290     fprintf(f, "#define HEIMDAL_NORETURN_ATTRIBUTE\n");
 291     fprintf(f, "#endif\n");
 292     fprintf(f, "#endif\n\n");
 293
 294     fprintf(f, "#ifndef HEIMDAL_UNUSED_ATTRIBUTE\n");
 295     fprintf(f, "#if __has_extension(unused) || KRB5TYPES_REQUIRE_GNUC(3,1,0)\n");
 296     fprintf(f, "#define HEIMDAL_UNUSED_ATTRIBUTE __attribute__((unused))\n");
 297     fprintf(f, "#else\n");
 298     fprintf(f, "#define HEIMDAL_UNUSED_ATTRIBUTE\n");
 299     fprintf(f, "#endif\n");
 300     fprintf(f, "#endif\n\n");
 301
 302     fprintf(f, "#ifndef HEIMDAL_WARN_UNUSED_RESULT_ATTRIBUTE\n");
 303     fprintf(f, "#if __has_extension(warn_unused_result) || KRB5TYPES_REQUIRE_GNUC(3,3,0)\n");
 304     fprintf(f, "#define HEIMDAL_WARN_UNUSED_RESULT_ATTRIBUTE __attribute__((warn_unused_result))\n");
 305     fprintf(f, "#else\n");
 306     fprintf(f, "#define HEIMDAL_WARN_UNUSED_RESULT_ATTRIBUTE\n");
 307     fprintf(f, "#endif\n");
 308     fprintf(f, "#endif\n\n");
 309
 310     fprintf(f, "#endif /* %s */\n", hb);
 311
 312     if (f != stdout)
 313         fclose(f);
 314     return 0;
 315 }