grovel/common.h

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <stdint.h>
   4 #include <string.h>
   5 #include <inttypes.h>
   6
   7 #ifndef offsetof
   8 #define offsetof(type, slot) ((long) ((char *) &(((type *) 0)->slot)))
   9 #endif
  10 #define getslot(type, slot) (((type *) 0)->slot)
  11 #define sizeofslot(type, slot) (sizeof(getslot(type, slot)))
  12 #define countofslot(type, slot) \
  13   (sizeof(getslot(type, slot)) / sizeof(getslot(type, slot)[0]))
  14 #define stringify(x) #x
  15 #define indirect_stringify(x) stringify(x)
  16
  17 #define TYPE_SIGNED_P(type) (((type)-1)<0LL)
  18 #define _64_BIT_VALUE_FITS_SIGNED_P(value) ( (value) <= 0x7FFFFFFFFFFFFFFFLL )
  19 #define SLOT_SIGNED_P(result, type, slot)                               \
  20   do {                                                                  \
  21     type slot_signed_p_struct;                                          \
  22     slot_signed_p_struct.slot = -1;                                     \
  23     (result) = slot_signed_p_struct.slot < 0;                           \
  24   } while (0)
  25
  26 void type_name(FILE *output, int signed_p, int size) {
  27   if (signed_p) {
  28     switch (size) {
  29     case 1: fprintf(output, ":int8"); break;
  30     case 2: fprintf(output, ":int16"); break;
  31     case 4: fprintf(output, ":int32"); break;
  32     case 8: fprintf(output, ":int64"); break;
  33     default: goto error;
  34     }
  35   } else {
  36     switch(size) {
  37     case 1: fprintf(output, ":uint8"); break;
  38     case 2: fprintf(output, ":uint16"); break;
  39     case 4: fprintf(output, ":uint32"); break;
  40     case 8: fprintf(output, ":uint64"); break;
  41     default: goto error;
  42     }
  43   }
  44
  45   return;
  46
  47 error:
  48   fprintf(output, "(cl:error \"No type of size ~D.\" %i)\n", size);
  49 }
  50
  51 char* print_double_for_lisp(double n)
  52 {
  53     static char buf[256];
  54     memset(buf, 0, 256);
  55     snprintf(buf, 255, "(let ((*read-default-float-format* 'double-float)) (coerce (read-from-string \"%.20E\") 'double-float))", n);
  56     return buf;
  57 }