summaryrefslogtreecommitdiff
path: root/support/dktools/dk4rec12.c
blob: 94ce3bb7e98c92d78d2cadb01c06ebd0960ec2eb (plain)
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
/*
	WARNING: This file was generated by dkct.
	Changes you make here will be lost if dkct is run again!
	You should modify the original source and run dkct on it.
	Original source: dk4rec12.ctr
*/

/*
Copyright (C) 2015-2017, Dirk Krause

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above opyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.
* Neither the name of the author nor the names of contributors may be used
  to endorse or promote products derived from this software without specific
  prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/**	@file dk4rec12.c The dk4rec12 module.
*/


#line 75 "dk4rec12.ctr"

#include "dk4rec12.h"
#include "dk4mem.h"
#include "dk4utf8.h"
#include "dk4utf16.h"



size_t
dk4recode_size_utf16_to_utf8(const dk4_c16_t *src, dk4_er_t *erp)
{
  dk4_er_t		 er;
  unsigned char		 buf[8];
  dk4_utf16_decoder_t	 dec;
  size_t		 sz;
  size_t		 rd	= 0;
  size_t		 back	= 0;
  dk4_c32_t		 c32	=	dkC32(0);
  if (NULL != src) {
    dk4error_init(&er);
    dk4utf16_init(&dec);
    while(((dk4_c16_t)0U != *src) && (DK4_E_NONE == er.ec)) {
      switch(dk4utf16_add(&dec, *(src++))) {
        case DK4_EDSTM_FINISHED: {
	  c32 = dk4utf16_get(&dec);
	  dk4utf16_init(&dec);
	  sz = sizeof(buf);
	  if (0 != dk4utf8_encode(buf, &sz, c32, &er)) {
	    if ((SIZE_MAX - sz) >= back) {
	      back += sz;
	      rd++;
	    } else {
	      dk4error_set_simple_error_code(&er, DK4_E_MATH_OVERFLOW);
	    }
	  }
	} break;
	case DK4_EDSTM_ERROR: {
	  dk4error_set_elsize_nelem(&er, DK4_E_SYNTAX, 2, rd);
	} break;
      }
    }
    if (0 == dk4utf16_is_empty(&dec)) {
      dk4error_set_elsize_nelem(&er, DK4_E_SYNTAX, 2, rd);
    }
    if (SIZE_MAX > back) {
      back++;
    } else {
      dk4error_set_simple_error_code(&er, DK4_E_MATH_OVERFLOW);
    }
    if (DK4_E_NONE != er.ec) {
      dk4error_copy(erp, &er);
      back = 0;
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}



int
dk4recode_utf16_to_utf8(
  char *dstb, size_t szdstb, const dk4_c16_t *src, dk4_er_t *erp
)
{
  unsigned char		 buf[8];
  dk4_utf16_decoder_t	 dec;
  size_t		 sz;
  size_t		 used	=	0;
  size_t		 rd	=	0;
  dk4_c32_t		 c32	=	dkC32(0);
  int			 back	=	0;

  if ((NULL != dstb) && (NULL != src) && (0 < szdstb)) {
    back = 1;
    dk4utf16_init(&dec);
    while(((dk4_c16_t)0U != *src) && (1 == back) && (used < szdstb)) {
      switch(dk4utf16_add(&dec, *(src++))) {
        case DK4_EDSTM_FINISHED: {
	  c32 = dk4utf16_get(&dec);
	  dk4utf16_init(&dec);
	  sz = sizeof(buf);
	  if (0 != dk4utf8_encode(buf, &sz, c32, erp)) {
	    if ((szdstb - used) > sz) {
	      DK4_MEMCPY(&(dstb[used]),buf,sz);
	      used += sz;
	    } else {
	      back = 0;
	      dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
	    }
	  } else {
	    back = 0;
	    dk4error_set_elsize_nelem(erp, DK4_E_SYNTAX, 2, rd);
	  }
	} break;
	case DK4_EDSTM_ERROR: {
	  back = 0;
	  dk4error_set_elsize_nelem(erp, DK4_E_SYNTAX, 2, rd);
	} break;
      }
      if (0 != back) { rd++; }
    }
    if (used < szdstb) {
      dstb[used] = '\0';
    } else {
      dstb[szdstb - 1] = '\0';
      back = 0;
      dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
    }
    if (0 == dk4utf16_is_empty(&dec)) {
      back = 0;
      dk4error_set_elsize_nelem(erp, DK4_E_SYNTAX, 2, rd);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}