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    1: 
    2: In the begining of a quizz file, the lexxer places itself in 
    3: <S_TEXT> state. This is the default state that collects all question 
    4: text problem by problem. 
    5: 
    6: 
    7: 
    8: In <S_TEXT> state, where question text are collected in this state, 
    9: the question text can continued to the next line by combining the two
   10: symbols '\' followed by a '\n'. 
   11: Variables can be displayed within "/DIS()" function. 
   12: 
   13: Within the <S_TEXT> state, begin of a line '/' commands 
   14: include "//", "/LET", "/BEG", "/HIN", "/EXP", "/IMP", 
   15: "/END", "/END()", "/ANS", "/MAP". 
   16: The "/DIS()" command can be placed within anyplace of the problem text,
   17: therefore, the pattern is not limited to match the begin of a line symbol '^'.
   18: A single "\n" indicates the end of a paragraph of question text, 
   19: therefore, lexxer returns this symbol to parser so that it signals the
   20: end of q_text. The "\n" will showup in the final question text. 
   21: The pattern "\"{Space}*"\n" represents the continuation of question text
   22: to the next line. In the lexxer, it simply does nothing. 
   23: 
   24: The token "//" appears at the beginning of a line indicates the whole 
   25: line as a comment. This is treated only by lexxer, it did not
   26: report any token to parser().
   27: The token "/LET" will 
   28: 
   29: 
   30: 
   31: 
   32: 
   33: When encountered a ^/ANS token, it switched to <S_ANSWER> state. 
   34: In <S_ANSWER> state, {Spaces}+ are ignored within the lexxer 
   35: without returning anything to parser, 
   36: and 
   37: a single '(' will cause Pcount++ and return token '(' to parser. 
   38: 
   39: <S_VARIABLE,S_LET,S_ANSWER,S_MAP> 
   40: is a combined state that does the following thing. 
   41: It ignores spaces. 
   42: When encountered a '(', it executes Pcount++ and return this symbol 
   43: to parser. 
   44: When there is a integer constant could be collected, it 
   45: returns a I_CONSTANT to parser and convert the string to integer. 
   46: When a real number encountered, it converts it into a real number and
   47: returns R_CONSTANT to parser. 
   48: When it encountered an identifier, it calls 
   49: find_identifier() and returns IDENTIFIER to parser().
   50: When it encountered a identifier followed by a 
   51: '(', then it simply collects the identifier to 
   52: a string and places it on top of the FuncStack[]. 
   53: It then returns FUNCTION_ID to parser().
   54: 
   55: 
   56: /IMP "/absolute/path/to/file" and 
   57: /IMP VariableName  have to be in one line, 
   58: it cannot be broken down into several lines
   59: 
   60: 
   61: 
   62: TO DO:
   63:   Internal variable names such as SUBJECTIVE[123][ABC]
   64:   
   65:   Add supports for loops like
   66: 
   67:   /LET var2 = random(1,9,1)
   68:   /WHILE ( var2 <= 10  )
   69:   
   70:   /LET problem_name = "file" + var2
   71:   /IMP problem_name
   72:   /LET var2 = var2 + 1
   73:   /ENDWHILE 
   74: 
   75:   /ANS() /AND
   76:   /ANS() /AND
   77:   /ANS()
   78: 
   79:   /ANS() /OR
   80:   /ANS() /OR
   81:   /ANS()
   82: 
   83:   /IF (var1 == 0)  
   84:          
   85:   /ELSE   
   86:     
   87:   /ENDIF
   88:   
   89:   /MACRO   macro_name(#1,#2,#3)   /ENDM
   90:   
   91:   
   92:   
   93: FILE FORMATS under CLASS/records/ directory
   94: active.log
   95:   wabash002 , 0 , 11242 , /dev/ttyp6 ,(06/11/97 15:13:40)
   96:   ^^^^^^^^^
   97:   9 chars student id
   98:   a space char, a comma, a space char, a comma, process id, a comma, term, date time.
   99:   
  100:   One student has only one entry in this file. 
  101: 
  102: duration.log
  103: 
  104: meisels01       /dev/ttyp3      Tue May 20 14:05:59 1997        Tue May 20 14:06:11 1997
  105: 173336318       /dev/ttyp1      Fri May 30 18:35:22 1997        Fri May 30 18:39:28 1997
  106: 173336318       /dev/ttyp1      Fri May 30 18:39:53 1997        Fri May 30 18:42:41 1997
  107: 
  108: student id, tty, start from , logout time. 
  109: One session has one entry. 
  110: 
  111: setX.db
  112: 20,01/01/97 08:00,05/15/99 08:00,05/15/99 09:00
  113: 11111111212113311222
  114: 00000000000000000000
  115: calcutta3 --------------------, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
  116: calcutta2 --------------------, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
  117: 
  118: the first item is the number of problems in this set for the purpose of parsing. 
  119: The second line is the problem weight and the third line is whether the corresponding 
  120: problem is of type partial credit or not. 
  121: 
  122: 
  123: logX.db
  124: a73336319 Fri Feb 27 18:03:15 1998 --------------Y-----
  125: a73336319 Fri Feb 27 18:04:08 1998 -----------------N--
  126: a73336319 Fri Feb 27 18:04:18 1998 -----------------Y--
  127: a87654444 Sat Feb 28 18:48:46 1998 ---u----------------
  128: a43986495 Wed Mar  4 09:48:33 1998 Y-------------------
  129: 
  130: weblogX.db
  131: 
  132: a87654322 Fri Feb 27 18:57:51 1998 ---u----------------
  133: a87654322 Fri Feb 27 19:35:57 1998 N-------------------
  134: a87654322 Fri Feb 27 19:36:06 1998 N-------------------
  135: a87654322 Fri Feb 27 19:36:16 1998 Y-------------------
  136: a87654444 Sat Feb 28 18:46:37 1998 N-------------------
  137: a73336318 Sun Mar  1 20:21:42 1998 -u------------------
  138: a73336318 Sun Mar  1 20:21:54 1998 -N------------------
  139: a73336318 Sun Mar  1 20:22:35 1998 -Y------------------
  140: a73336318 Sun Mar  1 20:23:49 1998 --U-----------------
  141: 
  142: 
  143: 
  144: submissionsX.db
  145: 
  146: A12345678       24/02 09:55:24  6       safsdf
  147: a73336318       26/02 13:26:17  2       46.6
  148: a73336318       26/02 13:28:24  2       46.4
  149: a73336318       26/02 13:28:40  2       46.6 cm
  150: a73336318       26/02 13:31:35  2       46.6
  151: a73336318       26/02 13:31:47  1       aedf
  152: a73336318       26/02 13:32:30  3       40.6 m
  153: guesta007       25/02 21:43:32  1       xcb
  154: a73336319       27/02 17:38:53  1       cdef
  155: a73336319       27/02 17:39:13  2       39.8 
  156: a73336319       27/02 17:39:22  2       39.8 m
  157: a73336319       27/02 17:39:47  2       .398 J/N
  158: 
  159: 
  160: websubmissionsX.db
  161: 
  162: a73336318       26/02 13:28:40  2       46.6 cm
  163: a73336318       26/02 13:31:35  2       46.6
  164: a73336318       26/02 13:31:47  1       aedf
  165: a73336318       26/02 13:32:30  3       40.6 m
  166: a73336318       26/02 13:32:44  3       40.6 kg
  167: a73336318       26/02 13:33:05  3       406 mm
  168: a73336318       26/02 13:33:32  4       .332 J/N
  169: a73336318       26/02 13:33:52  5       53.0 cm
  170: a73336318       26/02 13:34:13  5       53.01 cm
  171: a73336318       26/02 13:34:37  5       52.99 cm
  172: a73336318       26/02 13:34:49  5       52,995 cm
  173: a73336318       26/02 13:35:12  5       52.995 cm
  174: a73336318       26/02 13:38:06  5       53.00 cm
  175: a73336318       26/02 13:38:34  6       6.060
  176: a73336318       26/02 13:38:55  6       60.6
  177: a73336318       26/02 13:39:17  7       .97 m^2
  178: a73336318       26/02 13:39:33  7       .0097 m^2
  179: a73336318       26/02 13:42:51  8       1.99E3 cm^3
  180: 
  181: 
  182: 
  183: 
  184: subjective answers
  185: records/subj/ansX.db
  186: