backup/db2bkup.awk

   1 #       $Source$
   2 #       $Header$
   3 #
   4 #       This converts the file used to originally create the database
   5 #       into a program to back it up.
   6 #       This is not guaranteed to work for all data types; it may
   7 #       need to be extended.
   8
   9 BEGIN { print "/* This file automatically generated */";
  10         print "/* Do not edit */";
  11         print "#include <stdio.h>";
  12         print "#include \"dump_db.h\"";
  13         print "/* This file automatically generated */" > "bkup1.qc";
  14         print "/* Do not edit */" >> "bkup1.qc"
  15         print "#include <stdio.h>" >> "bkup1.qc"
  16         print "FILE *open_file();" >> "bkup1.qc"
  17         print "do_backups(prefix)\n\tchar *prefix;\n{" >>"bkup1.qc"
  18 }
  19
  20 /^create/ { printf "dump_%s(f)\nFILE *f;\n", $2;
  21         printf "\tdump_%s(open_file(prefix, \"%s\"));\n", $2, $2 >> "bkup1.qc"
  22         tablename = $2;
  23         rangename = substr(tablename, 1, 1);
  24         count = 0; }
  25
  26 $2 ~ /\=/ {
  27         vname[count] = $1;
  28         printf "/* %s */\n", $0
  29         if ($3 ~ /i[124]/) {
  30                 printf "##      int     t_%s;\n", vname[count]
  31                 vtype[count]="int"
  32         } else if ($3 ~ /text\([0-9]*\)/) {
  33                 t = split($3, temp, "(")
  34                 if (t != 2) printf "Can't parse %s\n", $3;
  35                 t = split(temp[2], temp2, ")")
  36                 if (t != 2) printf "Can't parse %s\n", temp[2];
  37                 printf "##      char    t_%s[%d];\n", vname[count], temp2[1]+1;
  38                 vtype[count]="str"
  39         } else if ($3 ~ /date/) {
  40                 printf "##      char    t_%s[26];\n", vname[count]
  41                 vtype[count]="str"
  42         } else if ($3 ~ /c[0-9]*/) {
  43                 t = split($3, temp, ",")
  44                 printf "##      char    t_%s[%d];\n", vname[count], substr(temp[1], 2) + 1
  45                 vtype[count]="str"
  46         } else printf "Unknown data type %s\n", $3;
  47         count++;
  48 }
  49
  50 /^\($/ { print "##{" }
  51 /^\)$/ {
  52         printf "##      range of %s is %s\n", rangename, tablename
  53         printf "##      retrieve(\n"
  54         for (i = 0; i < count; i++) {
  55                 if (i != 0) printf ",\n";
  56                 printf "##\t\tt_%s = %s.%s", vname[i], rangename, vname[i]
  57         }
  58         printf ")\n"
  59         printf "##      {\n"
  60         for (i = 0; i < count; i++) {
  61                 if (i != 0) print "\t\tdump_sep(f);"
  62                 printf "\t\tdump_%s(f, t_%s);\n", vtype[i], vname[i]
  63         }
  64         printf "\t\tdump_nl(f);\n"
  65         printf "##      }\n"
  66         printf "\tsafe_close(f);\n"
  67         printf "##}\n"
  68 }
  69 END { print "/* All done */"
  70         print "}" >>"bkup1.qc"
  71 }