File: tok.c

package info (click to toggle)
libast 0.7-9
  • links: PTS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 2,732 kB
  • sloc: ansic: 13,136; sh: 10,332; makefile: 78
file content (357 lines) | stat: -rw-r--r-- 10,971 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
/*
 * Copyright (C) 1997-2004, Michael Jennings
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies of the Software, its documentation and marketing & publicity
 * materials, and acknowledgment shall be given in the documentation, materials
 * and software packages that this Software was used.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

static const char __attribute__((unused)) cvs_ident[] = "$Id: tok.c,v 1.22 2004/07/23 21:38:39 mej Exp $";

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <libast_internal.h>

/* *INDENT-OFF* */
static SPIF_CONST_TYPE(class) t_class = {
    SPIF_DECL_CLASSNAME(tok),
    (spif_func_t) spif_tok_new,
    (spif_func_t) spif_tok_init,
    (spif_func_t) spif_tok_done,
    (spif_func_t) spif_tok_del,
    (spif_func_t) spif_tok_show,
    (spif_func_t) spif_tok_comp,
    (spif_func_t) spif_tok_dup,
    (spif_func_t) spif_tok_type
};
SPIF_TYPE(class) SPIF_CLASS_VAR(tok) = &t_class;
/* *INDENT-ON* */

spif_tok_t
spif_tok_new(void)
{
    spif_tok_t self;

    self = SPIF_ALLOC(tok);
    if (!spif_tok_init(self)) {
        SPIF_DEALLOC(self);
        self = SPIF_NULL_TYPE(tok);
    }
    return self;
}

spif_tok_t
spif_tok_new_from_ptr(spif_charptr_t old)
{
    spif_tok_t self;

    self = SPIF_ALLOC(tok);
    if (!spif_tok_init_from_ptr(self, old)) {
        SPIF_DEALLOC(self);
        self = SPIF_NULL_TYPE(tok);
    }
    return self;
}

spif_tok_t
spif_tok_new_from_fp(FILE * fp)
{
    spif_tok_t self;

    self = SPIF_ALLOC(tok);
    if (!spif_tok_init_from_fp(self, fp)) {
        SPIF_DEALLOC(self);
        self = SPIF_NULL_TYPE(tok);
    }
    return self;
}

spif_tok_t
spif_tok_new_from_fd(int fd)
{
    spif_tok_t self;

    self = SPIF_ALLOC(tok);
    if (!spif_tok_init_from_fd(self, fd)) {
        SPIF_DEALLOC(self);
        self = SPIF_NULL_TYPE(tok);
    }
    return self;
}

spif_bool_t
spif_tok_del(spif_tok_t self)
{
    spif_bool_t t;

    ASSERT_RVAL(!SPIF_TOK_ISNULL(self), FALSE);
    t = spif_tok_done(self);
    SPIF_DEALLOC(self);
    return t;
}

spif_bool_t
spif_tok_init(spif_tok_t self)
{
    ASSERT_RVAL(!SPIF_TOK_ISNULL(self), FALSE);
    if (!spif_obj_init(SPIF_OBJ(self))) {
        return FALSE;
    } else if (!spif_obj_set_class(SPIF_OBJ(self), SPIF_CLASS_VAR(tok))) {
        return FALSE;
    }
    self->src = SPIF_NULL_TYPE(str);
    self->quote = '\'';
    self->dquote = '\"';
    self->escape = '\\';
    self->tokens = SPIF_NULL_TYPE(list);
    self->sep = SPIF_NULL_TYPE(str);
    return TRUE;
}

spif_bool_t
spif_tok_init_from_ptr(spif_tok_t self, spif_charptr_t old)
{
    ASSERT_RVAL(!SPIF_TOK_ISNULL(self), FALSE);
    if (!spif_obj_init(SPIF_OBJ(self))) {
        return FALSE;
    } else if (!spif_obj_set_class(SPIF_OBJ(self), SPIF_CLASS_VAR(tok))) {
        return FALSE;
    }
    self->src = spif_str_new_from_ptr(old);
    self->quote = '\'';
    self->dquote = '\"';
    self->escape = '\\';
    self->tokens = SPIF_NULL_TYPE(list);
    self->sep = SPIF_NULL_TYPE(str);
    return ((SPIF_STR_ISNULL(self->src)) ? (FALSE) : (TRUE));
}

spif_bool_t
spif_tok_init_from_fp(spif_tok_t self, FILE * fp)
{
    ASSERT_RVAL(!SPIF_TOK_ISNULL(self), FALSE);
    if (!spif_obj_init(SPIF_OBJ(self))) {
        return FALSE;
    } else if (!spif_obj_set_class(SPIF_OBJ(self), SPIF_CLASS_VAR(tok))) {
        return FALSE;
    }
    self->src = spif_str_new_from_fp(fp);
    self->quote = '\'';
    self->dquote = '\"';
    self->escape = '\\';
    self->tokens = SPIF_NULL_TYPE(list);
    self->sep = SPIF_NULL_TYPE(str);
    return ((SPIF_STR_ISNULL(self->src)) ? (FALSE) : (TRUE));
}

spif_bool_t
spif_tok_init_from_fd(spif_tok_t self, int fd)
{
    ASSERT_RVAL(!SPIF_TOK_ISNULL(self), FALSE);
    if (!spif_obj_init(SPIF_OBJ(self))) {
        return FALSE;
    } else if (!spif_obj_set_class(SPIF_OBJ(self), SPIF_CLASS_VAR(tok))) {
        return FALSE;
    }
    self->src = spif_str_new_from_fd(fd);
    self->quote = '\'';
    self->dquote = '\"';
    self->escape = '\\';
    self->tokens = SPIF_NULL_TYPE(list);
    self->sep = SPIF_NULL_TYPE(str);
    return ((SPIF_STR_ISNULL(self->src)) ? (FALSE) : (TRUE));
}

spif_bool_t
spif_tok_done(spif_tok_t self)
{
    ASSERT_RVAL(!SPIF_TOK_ISNULL(self), FALSE);
    if (!SPIF_LIST_ISNULL(self->tokens)) {
        SPIF_LIST_DEL(self->tokens);
        self->tokens = SPIF_NULL_TYPE(list);
    }
    if (!SPIF_STR_ISNULL(self->src)) {
        spif_str_del(SPIF_STR(self->src));
        self->src = SPIF_NULL_TYPE(str);
    }
    if (!SPIF_STR_ISNULL(self->sep)) {
        spif_str_del(SPIF_STR(self->sep));
        self->sep = SPIF_NULL_TYPE(str);
    }
    self->quote = '\'';
    self->dquote = '\"';
    self->escape = '\\';
    return TRUE;
}

spif_str_t
spif_tok_show(spif_tok_t self, spif_charptr_t name, spif_str_t buff, size_t indent)
{
    spif_char_t tmp[4096];

    if (SPIF_TOK_ISNULL(self)) {
        SPIF_OBJ_SHOW_NULL(tok, name, buff, indent, tmp);
        return buff;
    }

    memset(tmp, ' ', indent);
    snprintf(SPIF_CHARPTR_C(tmp) + indent, sizeof(tmp) - indent,
             "(spif_tok_t) %s:  %10p {\n",
             name, SPIF_CAST(ptr) self);
    if (SPIF_STR_ISNULL(buff)) {
        buff = spif_str_new_from_ptr(tmp);
    } else {
        spif_str_append_from_ptr(buff, tmp);
    }
    buff = spif_str_show(SPIF_STR(self->src), SPIF_CHARPTR("src"), buff, indent + 2);
    buff = spif_str_show(SPIF_STR(self->sep), SPIF_CHARPTR("sep"), buff, indent + 2);

    indent += 2;
    memset(tmp, ' ', indent);
    snprintf(SPIF_CHARPTR_C(tmp) + indent, sizeof(tmp) - indent, "(spif_char_t) quote:  '%c' (0x%02x)\n",
             (char) self->quote, (unsigned int) self->quote);
    spif_str_append_from_ptr(buff, tmp);
    snprintf(SPIF_CHARPTR_C(tmp) + indent, sizeof(tmp) - indent, "(spif_char_t) dquote:  '%c' (0x%02x)\n",
             (char) self->dquote, (unsigned int) self->dquote);
    spif_str_append_from_ptr(buff, tmp);
    snprintf(SPIF_CHARPTR_C(tmp) + indent, sizeof(tmp) - indent, "(spif_char_t) escape:  '%c' (0x%02x)\n",
             (char) self->escape, (unsigned int) self->escape);
    spif_str_append_from_ptr(buff, tmp);

    SPIF_LIST_SHOW(self->tokens, buff, indent);
    indent -= 2;

    snprintf(SPIF_CHARPTR_C(tmp) + indent, sizeof(tmp) - indent, "}\n");
    spif_str_append_from_ptr(buff, tmp);
    return buff;
}

spif_cmp_t
spif_tok_comp(spif_tok_t self, spif_tok_t other)
{
    SPIF_OBJ_COMP_CHECK_NULL(self, other);
    SPIF_OBJ_COMP_CHECK_NULL(self->src, other->src);
    return spif_str_cmp(self->src, other->src);
}

spif_tok_t
spif_tok_dup(spif_tok_t self)
{
    spif_tok_t tmp;

    ASSERT_RVAL(!SPIF_TOK_ISNULL(self), SPIF_NULL_TYPE(tok));
    tmp = spif_tok_new();
    tmp->src = spif_str_dup(SPIF_STR(self->src));
    tmp->quote = self->quote;
    tmp->dquote = self->dquote;
    tmp->escape = self->escape;
    tmp->tokens = SPIF_LIST_DUP(self->tokens);
    tmp->sep = spif_str_dup(SPIF_STR(self->sep));

    return tmp;
}

spif_classname_t
spif_tok_type(spif_tok_t self)
{
    ASSERT_RVAL(!SPIF_TOK_ISNULL(self), SPIF_NULL_TYPE(classname));
    return SPIF_OBJ_CLASSNAME(self);
}

#define IS_DELIM(c)  ((delim != NULL) ? (strchr(delim, (c)) != NULL) : (isspace(c)))
#define IS_QUOTE(c)  (quote && quote == (c))

spif_bool_t
spif_tok_eval(spif_tok_t self)
{
    const char *pstr, *delim = NULL;
    spif_str_t tmp;
    char quote;
    size_t len;

    ASSERT_RVAL(!SPIF_TOK_ISNULL(self), FALSE);
    REQUIRE_RVAL(!SPIF_STR_ISNULL(self->src), FALSE);

    pstr = SPIF_CAST_C(const char *) SPIF_STR_STR(SPIF_STR(self->src));
    len = spif_str_get_len(SPIF_STR(self->src));

    if (!SPIF_STR_ISNULL(self->sep)) {
        delim = SPIF_CAST_C(const char *) SPIF_STR_STR(SPIF_STR(self->sep));
    }

    if (!SPIF_LIST_ISNULL(self->tokens)) {
        SPIF_LIST_DEL(self->tokens);
    }
    self->tokens = SPIF_LIST_NEW(dlinked_list);

    /* Before we do anything, skip leading "whitespace." */
    for (; *pstr && IS_DELIM(*pstr); pstr++);

    /* The outermost for loop is where we traverse the string.  Each new
       word brings us back to the top where we resize our string list. */
    for (quote = 0; *pstr; ) {
        tmp = spif_str_new_from_buff(SPIF_CHARPTR(""), len);
        spif_str_clear(tmp, 0);

        /* This for loop is where we process each character. */
        for (; *pstr && (quote || !IS_DELIM(*pstr));) {
            if (*pstr == self->dquote || *pstr == self->quote) {
                /* It's a quote character, so set or reset the quote variable. */
                if (quote) {
                    if (quote == *pstr) {
                        quote = 0;
                    } else {
                        /* It's a single quote inside double quotes, or vice versa.  Leave it alone. */
                        spif_str_append_char(tmp, *pstr);
                    }
                } else {
                    quote = *pstr;
                }
                pstr++;
            } else {
                /* Handle any backslashes that are escaping delimiters or quotes. */
                if ((*pstr == self->escape) && (IS_DELIM(*(pstr + 1)) || IS_QUOTE(*(pstr + 1)))) {
                    /* Incrementing pstr here moves us past the backslash so that the line
                       below will copy the next character to the new token, no questions asked. */
                    pstr++;
                }
                spif_str_append_char(tmp, *pstr++);
            }
        }

        /* Reallocate the new string to be just the right size. */
        spif_str_trim(tmp);
        len -= spif_str_get_len(tmp);

        /* Add it to the list */
        SPIF_LIST_APPEND(self->tokens, tmp);

        /* Move past any trailing "whitespace." */
        for (; *pstr && IS_DELIM(*pstr); pstr++);
    }
    return TRUE;
}

SPIF_DEFINE_PROPERTY_FUNC(tok, str, src)
SPIF_DEFINE_PROPERTY_FUNC_NONOBJ(tok, char, quote)
SPIF_DEFINE_PROPERTY_FUNC_NONOBJ(tok, char, dquote)
SPIF_DEFINE_PROPERTY_FUNC_NONOBJ(tok, char, escape)
SPIF_DEFINE_PROPERTY_FUNC(tok, str, sep)
SPIF_DEFINE_PROPERTY_FUNC(tok, list, tokens)