1 /* CCL - lexical analysis
5 * Revision 1.5 1995/02/23 08:32:00 adam
8 * Revision 1.3 1995/02/15 17:42:16 adam
9 * Minor changes of the api of this module. FILE* argument added
12 * Revision 1.2 1995/02/14 19:55:13 adam
13 * Header files ccl.h/cclp.h are gone! They have been merged an
14 * moved to ../include/ccl.h.
15 * Node kind(s) in ccl_rpn_node have changed names.
17 * Revision 1.1 1995/02/13 12:35:21 adam
18 * First version of CCL. Qualifiers aren't handled yet.
29 static int strin (const char *s, const char *cset)
39 const char *ccl_token_and = "and";
40 const char *ccl_token_or = "or";
41 const char *ccl_token_not = "not";
42 const char *ccl_token_set = "set";
44 struct ccl_token *ccl_tokenize (const char *command)
46 const char *cp = command;
47 struct ccl_token *first = NULL;
48 struct ccl_token *last = NULL;
52 while (*cp && strin (cp, " \t\r\n"))
59 first = last = malloc (sizeof (*first));
65 last->next = malloc (sizeof(*first));
67 last->next->prev = last;
76 last->kind = CCL_TOK_EOL;
79 last->kind = CCL_TOK_LP;
82 last->kind = CCL_TOK_RP;
85 last->kind = CCL_TOK_COMMA;
89 last->kind = CCL_TOK_PROX;
90 while (*cp == '%' || *cp == '!')
99 if (*cp == '=' || *cp == '<' || *cp == '>')
102 last->kind = CCL_TOK_REL;
105 else if (cp[-1] == '=')
106 last->kind = CCL_TOK_EQ;
108 last->kind = CCL_TOK_REL;
111 last->kind = CCL_TOK_MINUS;
114 last->kind = CCL_TOK_TERM;
117 while (*cp && *cp != '\"')
126 while (*cp && !strin (cp, "(),%!><=- \t\n\r"))
131 if (strlen (ccl_token_and)==last->len &&
132 !memcmp (ccl_token_and, last->name, last->len))
133 last->kind = CCL_TOK_AND;
134 else if (strlen (ccl_token_or)==last->len &&
135 !memcmp (ccl_token_or, last->name, last->len))
136 last->kind = CCL_TOK_OR;
137 else if (strlen (ccl_token_not)==last->len &&
138 !memcmp (ccl_token_not, last->name, last->len))
139 last->kind = CCL_TOK_NOT;
140 else if (strlen (ccl_token_set)==last->len &&
141 !memcmp (ccl_token_set, last->name, last->len))
142 last->kind = CCL_TOK_SET;
144 last->kind = CCL_TOK_TERM;