source: mainline/uspace/app/sbi/src/builtin/bi_string.c

Last change on this file was 1433ecda, checked in by Jiri Svoboda <jiri@…>, 7 years ago

Fix cstyle: make ccheck-fix and commit only files where all the changes are good.

  • Property mode set to 100644
File size: 4.4 KB
Line 
1/*
2 * Copyright (c) 2010 Jiri Svoboda
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @file String builtin binding. */
30
31#include <stdio.h>
32#include <stdlib.h>
33#include <assert.h>
34#include "../bigint.h"
35#include "../builtin.h"
36#include "../debug.h"
37#include "../mytypes.h"
38#include "../os/os.h"
39#include "../rdata.h"
40#include "../run.h"
41#include "../strtab.h"
42
43#include "bi_string.h"
44
45static void bi_string_length(run_t *run);
46static void bi_string_slice(run_t *run);
47
48/** Declare String builtin.
49 *
50 * @param bi Builtin object
51 */
52void bi_string_declare(builtin_t *bi)
53{
54 (void) bi;
55}
56
57/** Bind String builtin.
58 *
59 * @param bi Builtin object
60 */
61void bi_string_bind(builtin_t *bi)
62{
63 builtin_fun_bind(bi, "String", "get_length", bi_string_length);
64 builtin_fun_bind(bi, "String", "Slice", bi_string_slice);
65}
66
67/** Return length of the string.
68 *
69 * @param run Runner object
70 */
71static void bi_string_length(run_t *run)
72{
73 rdata_var_t *self_value_var;
74 const char *str;
75 size_t str_l;
76
77 rdata_int_t *rint;
78 rdata_var_t *rvar;
79 rdata_value_t *rval;
80 rdata_item_t *ritem;
81
82 run_proc_ar_t *proc_ar;
83
84 /* Extract self.Value */
85 self_value_var = builtin_get_self_mbr_var(run, "Value");
86 assert(self_value_var->vc == vc_string);
87 str = self_value_var->u.string_v->value;
88 str_l = os_str_length(str);
89
90#ifdef DEBUG_RUN_TRACE
91 printf("Get length of string '%s'.\n", str);
92#endif
93
94 /* Construct return value. */
95 rint = rdata_int_new();
96 bigint_init(&rint->value, (int) str_l);
97
98 rvar = rdata_var_new(vc_int);
99 rvar->u.int_v = rint;
100 rval = rdata_value_new();
101 rval->var = rvar;
102
103 ritem = rdata_item_new(ic_value);
104 ritem->u.value = rval;
105
106 proc_ar = run_get_current_proc_ar(run);
107 proc_ar->retval = ritem;
108}
109
110/** Return slice (substring) of the string.
111 *
112 * @param run Runner object
113 */
114static void bi_string_slice(run_t *run)
115{
116 rdata_var_t *self_value_var;
117 const char *str;
118 const char *slice;
119 size_t str_l;
120
121 rdata_var_t *start_var;
122 int start;
123
124 rdata_var_t *length_var;
125 int length;
126
127 errno_t rc;
128
129 /* Extract self.Value */
130 self_value_var = builtin_get_self_mbr_var(run, "Value");
131 assert(self_value_var->vc == vc_string);
132 str = self_value_var->u.string_v->value;
133 str_l = os_str_length(str);
134
135 /* Get argument @a start. */
136 start_var = run_local_vars_lookup(run, strtab_get_sid("start"));
137 assert(start_var);
138 assert(start_var->vc == vc_int);
139
140 rc = bigint_get_value_int(&start_var->u.int_v->value, &start);
141 if (rc != EOK || start < 0 || (size_t) start > str_l) {
142 printf("Error: Parameter 'start' to Slice() out of range.\n");
143 exit(1);
144 }
145
146 /* Get argument @a length. */
147 length_var = run_local_vars_lookup(run, strtab_get_sid("length"));
148 assert(length_var);
149 assert(length_var->vc == vc_int);
150
151 rc = bigint_get_value_int(&length_var->u.int_v->value, &length);
152 if (rc != EOK || length < 0 || (size_t) (start + length) > str_l) {
153 printf("Error: Parameter 'length' to Slice() out of range.\n");
154 exit(1);
155 }
156
157#ifdef DEBUG_RUN_TRACE
158 printf("Construct Slice(%d, %d) from string '%s'.\n",
159 start, length, str);
160#endif
161 slice = os_str_aslice(str, start, length);
162
163 /* Ownership of slice is transferred. */
164 builtin_return_string(run, slice);
165}
Note: See TracBrowser for help on using the repository browser.