include/bits.c

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