Source File modules/up/UP_subject.c

    1    | /***************************************
    2    |   $Revision: 1.2 $
    3    |
    4    |   UP subject line parsing
    5    |
    6    |   Status: NOT REVIEWED, TESTED
    7    |
    8    |   Author(s):       Engin Gunduz
    9    |
    10   |   ******************/ /******************
    11   |   Modification History:
    12   |         engin (19/03/2001) Created.
    13   |   ******************/ /******************
    14   |   Copyright (c) 2001                              RIPE NCC
    15   |
    16   |   All Rights Reserved
    17   |
    18   |   Permission to use, copy, modify, and distribute this software and its
    19   |   documentation for any purpose and without fee is hereby granted,
    20   |   provided that the above copyright notice appear in all copies and that
    21   |   both that copyright notice and this permission notice appear in
    22   |   supporting documentation, and that the name of the author not be
    23   |   used in advertising or publicity pertaining to distribution of the
    24   |   software without specific, written prior permission.
    25   |
    26   |   THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
    27   |   ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS; IN NO EVENT SHALL
    28   |   AUTHOR BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
    29   |   DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
    30   |   AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    31   |   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
    32   |  ***************************************/
    33   |
    34   |
    35   | #include "UP_subject.h"
    36   | #include "glib.h"
    37   |
    38   |
    39   | /*
    40   |    Classifies the given word. The word can be HELP, HOWTO or NEW
    41   |    up_classify_word may return UP_KEYWORD_HELP (for HELP & HOWTO),
    42   |    UP_KEYWORD_NEW (for NEW) or UP_KEYWORD_UNRECOG (for all others).
    43   |    Comparisons are case insensitive.
    44   | */
    45   | int up_classify_word(const char * word){
    46   |
    47   |   if(word == NULL){
    48   |     return UP_KEYWORD_UNRECOG;
    49   |   }
    50   |
    51   |   if( strcasecmp(word, "HOWTO") == 0 || strcasecmp(word, "HELP") == 0){
    52   |
    53   |     return UP_KEYWORD_HELP;
    54   |
    55   |   }else if( strcasecmp(word, "NEW") == 0){
    56   |
    57   |     return UP_KEYWORD_NEW;
    58   |
    59   |   }else{
    60   |
    61   |     return UP_KEYWORD_UNRECOG;
    62   |
    63   |   }
    64   |
    65   | }
    66   |
    67   |
    68   |
    69   |
    70   | /* UP_subject_process function gets the "Subject:" line of a
    71   |    update message and processes it. It tries to see if the
    72   |    words in the subject line are keywords that are recognised ones.
    73   |    The recognised ones are: HELP, HOWTO and NEW. The possible
    74   |    return values are UP_SUBJ_HELP_REQ, UP_SUBJ_NEW_ENFORCED,
    75   |    UP_SUBJ_UNRECOG and UP_SUBJ_ALL_UNRECOG.
    76   |
    77   |      UP_SUBJ_HELP_REQ means only HELP keyword is existent in the subject line
    78   |      UP_SUBJ_NEW_ENFORCED means only NEW keyword is existent in the subject line
    79   |      UP_SUBJ_UNRECOG means some unrecognised words found in subj line as well as
    80   |                at least one recognised one.
    81   |      UP_SUBJ_ALL_UNRECOG means all words were unrecognised ones (or subject
    82   |                             line was empty or non-existent)
    83   |      UP_SUBJ_INVALID_COMB means an invalid combination in given in the subject line.
    84   |    */
    85   | up_subject_struct UP_subject_process(const char *arg){
    86   |
    87   |   up_subject_struct return_struct;
    88   |   char ** temp;
    89   |   int i;
    90   |   char * list_of_nonkeywords = NULL;
    91   |   char * subject_line = NULL;
    92   |
    93   |   subject_line = strdup(arg);
    94   |
    95   |
    96   |   /* initialize the struct */
    97   |   return_struct.result = UP_SUBJ_INIT;
    98   |
    99   |   list_of_nonkeywords = strdup("");
    100  |
    101  |   /* convert \t, \r, \n chars to white spaces */
    102  |   for(i=0; i < (strlen(subject_line)) ; i++){
    103  |
    104  |     if(   subject_line[i] == '\t' || subject_line[i] == '\n'
    105  |        || subject_line[i] == '\r' ){
    106  |       subject_line[i] = ' ';
    107  |     }
    108  |   }
    109  |
    110  |   /* split the string into lines */
    111  |   temp = g_strsplit (subject_line, " ", 0);
    112  |
    113  |   for(i=0; temp[i] != NULL; i++){
    114  |     if(strlen(temp[i]) > 0){
    115  |
    116  |       switch(up_classify_word(temp[i])){
    117  |         case UP_KEYWORD_HELP:
    118  |           switch(return_struct.result){
    119  |
    120  |             case UP_SUBJ_INIT:
    121  |               return_struct.result = UP_SUBJ_HELP_REQ; break;
    122  |             case UP_SUBJ_HELP_REQ: break;
    123  |             case UP_SUBJ_NEW_ENFORCED:
    124  |               return_struct.result = UP_SUBJ_UNRECOG; break;
    125  |             case UP_SUBJ_UNRECOG: break;
    126  |             case UP_SUBJ_ALL_UNRECOG:
    127  |               return_struct.result = UP_SUBJ_UNRECOG;  break;
    128  |             case UP_SUBJ_INVALID_COMB: break;
    129  |             default: ;
    130  |           }; break;
    131  |
    132  |
    133  |         case UP_KEYWORD_NEW:
    134  |           switch(return_struct.result){
    135  |
    136  |             case UP_SUBJ_INIT:
    137  |               return_struct.result = UP_SUBJ_NEW_ENFORCED; break;
    138  |             case UP_SUBJ_HELP_REQ:
    139  |               return_struct.result = UP_SUBJ_INVALID_COMB; break;
    140  |             case UP_SUBJ_NEW_ENFORCED: break;
    141  |             case UP_SUBJ_UNRECOG: break;
    142  |             case UP_SUBJ_ALL_UNRECOG:
    143  |               return_struct.result = UP_SUBJ_UNRECOG;  break;
    144  |             case UP_SUBJ_INVALID_COMB: break;
    145  |             default: ;
    146  |           }; break;
    147  |
    148  |         case UP_KEYWORD_UNRECOG:
    149  |
    150  |           if(strlen(list_of_nonkeywords) == 0){
    151  |             list_of_nonkeywords = (char *)realloc(list_of_nonkeywords,
    152  |                   strlen(temp[i]) + 1);
    153  |             list_of_nonkeywords = strcat(list_of_nonkeywords, temp[i]);
    154  |           }else{
    155  |              list_of_nonkeywords = (char *)realloc(list_of_nonkeywords,
    156  |                   strlen(list_of_nonkeywords) + strlen(temp[i]) + 2);
    157  |              list_of_nonkeywords = strcat(list_of_nonkeywords, " ");
    158  |              list_of_nonkeywords = strcat(list_of_nonkeywords, temp[i]);
    159  |           };
    160  |
    161  |           switch(return_struct.result){
    162  |
    163  |             case UP_SUBJ_INIT:
    164  |               return_struct.result = UP_SUBJ_ALL_UNRECOG; break;
    165  |             case UP_SUBJ_HELP_REQ:
    166  |               return_struct.result = UP_SUBJ_UNRECOG; break;
    167  |             case UP_SUBJ_NEW_ENFORCED:
    168  |               return_struct.result = UP_SUBJ_UNRECOG; break;
    169  |             case UP_SUBJ_UNRECOG: break;
    170  |             case UP_SUBJ_ALL_UNRECOG: break;
    171  |             case UP_SUBJ_INVALID_COMB:
    172  |               return_struct.result = UP_SUBJ_UNRECOG; break;
    173  |             default: ;
    174  |
    175  |           }; break;
    176  |         default: ;
    177  |       }
    178  |     }
    179  |   }
    180  |
    181  |   if(return_struct.result == UP_SUBJ_INIT){/* There were no words in the subject */
    182  |     return_struct.result = UP_SUBJ_ALL_UNRECOG;
    183  |   }
    184  |
    185  |   return_struct.word_list = list_of_nonkeywords;
    186  |
    187  |   free(subject_line);
    188  |
    189  |   return return_struct;
    190  | }