uspace/app/sbi/src/builtin/bi_char.c

   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 Char 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_char.h"
  44
  45 static void bi_char_get_as_string(run_t *run);
  46
  47 /** Declare Char builtin.
  48  *
  49  * @param bi    Builtin object
  50  */
  51 void bi_char_declare(builtin_t *bi)
  52 {
  53         (void) bi;
  54 }
  55
  56 /** Bind Char builtin.
  57  *
  58  * @param bi    Builtin object
  59  */
  60 void bi_char_bind(builtin_t *bi)
  61 {
  62         builtin_fun_bind(bi, "Char", "get_as_string", bi_char_get_as_string);
  63 }
  64
  65 /** Return string representation.
  66  *
  67  * @param run   Runner object
  68  */
  69 static void bi_char_get_as_string(run_t *run)
  70 {
  71         rdata_var_t *self_value_var;
  72         bigint_t *cval;
  73         char *str;
  74         int char_val;
  75         errno_t rc;
  76
  77 #ifdef DEBUG_RUN_TRACE
  78         printf("Convert char to string.\n");
  79 #endif
  80         /* Extract self.Value */
  81         self_value_var = builtin_get_self_mbr_var(run, "Value");
  82         assert(self_value_var->vc == vc_char);
  83         cval = &self_value_var->u.char_v->value;
  84
  85         rc = bigint_get_value_int(cval, &char_val);
  86         if (rc != EOK) {
  87                 /* XXX Should raise exception. */
  88                 builtin_return_string(run, os_str_dup("?"));
  89                 return;
  90         }
  91
  92         str = os_chr_to_astr((char32_t) char_val);
  93
  94         /* Ownership of str is transferred. */
  95         builtin_return_string(run, str);
  96 }