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  * 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("$Id$");
  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; const 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     const 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         p = malloc(strlen(fn) + 5);
 125         sprintf(p, "__%s__", fn);
 126         hb = p;
 127         for(; *p; p++){
 128             if(!isalnum((unsigned char)*p))
 129                 *p = '_';
 130         }
 131         f = fopen(argv[1], "w");
 132     }
 133     fprintf(f, "/* %s -- this file was generated for %s by\n", fn, HOST);
 134     fprintf(f, "   %*s    %s */\n\n", (int)strlen(fn), "",
 135             "$Id$");
 136     fprintf(f, "#ifndef %s\n", hb);
 137     fprintf(f, "#define %s\n", hb);
 138     fprintf(f, "\n");
 139 #ifdef HAVE_INTTYPES_H
 140     fprintf(f, "#include <inttypes.h>\n");
 141 #endif
 142 #ifdef HAVE_SYS_TYPES_H
 143     fprintf(f, "#include <sys/types.h>\n");
 144 #endif
 145 #ifdef HAVE_SYS_BITYPES_H
 146     fprintf(f, "#include <sys/bitypes.h>\n");
 147 #endif
 148 #ifdef HAVE_BIND_BITYPES_H
 149     fprintf(f, "#include <bind/bitypes.h>\n");
 150 #endif
 151 #ifdef HAVE_NETINET_IN6_MACHTYPES_H
 152     fprintf(f, "#include <netinet/in6_machtypes.h>\n");
 153 #endif
 154 #ifdef HAVE_SOCKLEN_T
 155     fprintf(f, "#include <sys/socket.h>\n");
 156 #endif
 157     fprintf(f, "\n");
 158
 159     flag = 0;
 160 #ifndef HAVE_INT8_T
 161     flag = print_bt(f, flag);
 162     try_signed (f, 8);
 163 #endif /* HAVE_INT8_T */
 164 #ifndef HAVE_INT16_T
 165     flag = print_bt(f, flag);
 166     try_signed (f, 16);
 167 #endif /* HAVE_INT16_T */
 168 #ifndef HAVE_INT32_T
 169     flag = print_bt(f, flag);
 170     try_signed (f, 32);
 171 #endif /* HAVE_INT32_T */
 172 #if 0
 173 #ifndef HAVE_INT64_T
 174     flag = print_bt(f, flag);
 175     try_signed (f, 64);
 176 #endif /* HAVE_INT64_T */
 177 #endif
 178
 179 #ifndef HAVE_UINT8_T
 180     flag = print_bt(f, flag);
 181     try_unsigned (f, 8);
 182 #endif /* HAVE_UINT8_T */
 183 #ifndef HAVE_UINT16_T
 184     flag = print_bt(f, flag);
 185     try_unsigned (f, 16);
 186 #endif /* HAVE_UINT16_T */
 187 #ifndef HAVE_UINT32_T
 188     flag = print_bt(f, flag);
 189     try_unsigned (f, 32);
 190 #endif /* HAVE_UINT32_T */
 191 #if 0
 192 #ifndef HAVE_UINT64_T
 193     flag = print_bt(f, flag);
 194     try_unsigned (f, 64);
 195 #endif /* HAVE_UINT64_T */
 196 #endif
 197
 198 #define X(S) fprintf(f, "typedef uint" #S "_t u_int" #S "_t;\n")
 199 #ifndef HAVE_U_INT8_T
 200     flag = print_bt(f, flag);
 201     X(8);
 202 #endif /* HAVE_U_INT8_T */
 203 #ifndef HAVE_U_INT16_T
 204     flag = print_bt(f, flag);
 205     X(16);
 206 #endif /* HAVE_U_INT16_T */
 207 #ifndef HAVE_U_INT32_T
 208     flag = print_bt(f, flag);
 209     X(32);
 210 #endif /* HAVE_U_INT32_T */
 211 #if 0
 212 #ifndef HAVE_U_INT64_T
 213     flag = print_bt(f, flag);
 214     X(64);
 215 #endif /* HAVE_U_INT64_T */
 216 #endif
 217
 218     if(flag){
 219         fprintf(f, "\n");
 220         fprintf(f, "#endif /* __BIT_TYPES_DEFINED__ */\n\n");
 221     }
 222 #ifdef KRB5
 223     fprintf(f, "\n");
 224 #if defined(HAVE_SOCKLEN_T)
 225     fprintf(f, "typedef socklen_t krb5_socklen_t;\n");
 226 #else
 227     fprintf(f, "typedef int krb5_socklen_t;\n");
 228 #endif
 229 #if defined(HAVE_SSIZE_T)
 230 #ifdef HAVE_UNISTD_H
 231     fprintf(f, "#include <unistd.h>\n");
 232 #endif
 233     fprintf(f, "typedef ssize_t krb5_ssize_t;\n");
 234 #else
 235     fprintf(f, "typedef int krb5_ssize_t;\n");
 236 #endif
 237     fprintf(f, "\n");
 238 #endif /* KRB5 */
 239     fprintf(f, "#endif /* %s */\n", hb);
 240     return 0;
 241 }