mkopcodec.awk

   1 #!/usr/bin/awk -f
   2 #
   3 # This AWK script scans the opcodes.h file (which is itself generated by
   4 # another awk script) and uses the information gleaned to create the
   5 # opcodes.c source file.
   6 #
   7 # Opcodes.c contains strings which are the symbolic names for the various
   8 # opcodes used by the VDBE.  These strings are used when disassembling a
   9 # VDBE program during tracing or as a result of the EXPLAIN keyword.
  10 #
  11 BEGIN {
  12   print "/* Automatically generated.  Do not edit */"
  13   print "/* See the mkopcodec.awk script for details. */"
  14   printf "#if !defined(SQLITE_OMIT_EXPLAIN)"
  15   printf    " || !defined(NDEBUG)"
  16   printf    " || defined(VDBE_PROFILE)"
  17   print     " || defined(SQLITE_DEBUG)"
  18   print "const char *sqlite3OpcodeName(int i){"
  19   print " static const char *const azName[] = { \"?\","
  20   mx = 0
  21 }
  22 /define OP_/ {
  23   sub("OP_","",$2)
  24   i = $3+0
  25   label[i] = $2
  26   if( mx<i ) mx = i
  27 }
  28 END {
  29   for(i=1; i<=mx; i++){
  30     printf "     /* %3d */ \"%s\",\n", i, label[i]
  31   }
  32   print "  };"
  33   print "  return azName[i];"
  34   print "}"
  35   print "#endif"
  36 }