2 * Copyright (c) 1995, the EUROPAGATE consortium (see below).
4 * The EUROPAGATE consortium members are:
6 * University College Dublin
7 * Danmarks Teknologiske Videnscenter
8 * An Chomhairle Leabharlanna
9 * Consejo Superior de Investigaciones Cientificas
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12 * its documentation, in whole or in part, for any purpose, is hereby granted,
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26 * software, and to plan further developments. The consortium may use
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30 * documenting their use of the software, to acknowledge the EUROPAGATE
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44 /* CCL - lexical analysis
47 * $Log: ccltoken.c,v $
48 * Revision 1.10 1995/07/11 12:28:31 adam
49 * New function: ccl_token_simple (split into simple tokens) and
50 * ccl_token_del (delete tokens).
52 * Revision 1.9 1995/05/16 09:39:28 adam
55 * Revision 1.8 1995/05/11 14:03:57 adam
56 * Changes in the reading of qualifier(s). New function: ccl_qual_fitem.
57 * New variable ccl_case_sensitive, which controls whether reserved
58 * words and field names are case sensitive or not.
60 * Revision 1.7 1995/04/19 12:11:24 adam
63 * Revision 1.6 1995/04/17 09:31:48 adam
64 * Improved handling of qualifiers. Aliases or reserved words.
66 * Revision 1.5 1995/02/23 08:32:00 adam
69 * Revision 1.3 1995/02/15 17:42:16 adam
70 * Minor changes of the api of this module. FILE* argument added
73 * Revision 1.2 1995/02/14 19:55:13 adam
74 * Header files ccl.h/cclp.h are gone! They have been merged an
75 * moved to ../include/ccl.h.
76 * Node kind(s) in ccl_rpn_node have changed names.
78 * Revision 1.1 1995/02/13 12:35:21 adam
79 * First version of CCL. Qualifiers aren't handled yet.
90 const char *ccl_token_and = "and";
91 const char *ccl_token_or = "or";
92 const char *ccl_token_not = "not andnot";
93 const char *ccl_token_set = "set";
94 int ccl_case_sensitive = 1;
97 * token_cmp: Compare token with keyword(s)
98 * kw: Keyword list. Each keyword is separated by space.
100 * return: 1 if token string matches one of the keywords in list;
103 static int token_cmp (const char *kw, struct ccl_token *token)
105 const char *cp1 = kw;
109 while ((cp2 = strchr (cp1, ' ')))
111 if (token->len == cp2-cp1)
112 if (ccl_case_sensitive)
114 if (!memcmp (cp1, token->name, token->len))
119 if (!ccl_memicmp (cp1, token->name, token->len))
124 if (ccl_case_sensitive)
125 return token->len == strlen(cp1)
126 && !memcmp (cp1, token->name, token->len);
127 return token->len == strlen(cp1) &&
128 !ccl_memicmp (cp1, token->name, token->len);
132 * ccl_token_simple: tokenize CCL raw tokens
134 struct ccl_token *ccl_token_simple (const char *command)
136 const char *cp = command;
137 struct ccl_token *first = NULL;
138 struct ccl_token *last = NULL;
142 while (*cp && strchr (" \t\r\n", *cp))
149 first = last = malloc (sizeof (*first));
155 last->next = malloc (sizeof(*first));
157 last->next->prev = last;
166 last->kind = CCL_TOK_EOL;
169 last->kind = CCL_TOK_TERM;
172 while (*cp && *cp != '\"')
181 while (*cp && !strchr (" \t\n\r", *cp))
186 last->kind = CCL_TOK_TERM;
193 * ccl_tokenize: tokenize CCL command string.
194 * return: CCL token list.
196 struct ccl_token *ccl_tokenize (const char *command)
198 const char *cp = command;
199 struct ccl_token *first = NULL;
200 struct ccl_token *last = NULL;
204 while (*cp && strchr (" \t\r\n", *cp))
211 first = last = malloc (sizeof (*first));
217 last->next = malloc (sizeof(*first));
219 last->next->prev = last;
228 last->kind = CCL_TOK_EOL;
231 last->kind = CCL_TOK_LP;
234 last->kind = CCL_TOK_RP;
237 last->kind = CCL_TOK_COMMA;
241 last->kind = CCL_TOK_PROX;
242 while (*cp == '%' || *cp == '!')
251 if (*cp == '=' || *cp == '<' || *cp == '>')
254 last->kind = CCL_TOK_REL;
257 else if (cp[-1] == '=')
258 last->kind = CCL_TOK_EQ;
260 last->kind = CCL_TOK_REL;
263 last->kind = CCL_TOK_MINUS;
266 last->kind = CCL_TOK_TERM;
269 while (*cp && *cp != '\"')
278 while (*cp && !strchr ("(),%!><=- \t\n\r", *cp))
283 if (token_cmp (ccl_token_and, last))
284 last->kind = CCL_TOK_AND;
285 else if (token_cmp (ccl_token_or, last))
286 last->kind = CCL_TOK_OR;
287 else if (token_cmp (ccl_token_not, last))
288 last->kind = CCL_TOK_NOT;
289 else if (token_cmp (ccl_token_set, last))
290 last->kind = CCL_TOK_SET;
292 last->kind = CCL_TOK_TERM;
299 * ccl_token_del: delete CCL tokens
301 void ccl_token_del (struct ccl_token *list)
303 struct ccl_token *list1;