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1 // Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // Name : wcrtomb.cpp |
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15 // Part of : MRT LIBC |
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16 // Contains the source for the wcrtomb API implementation. |
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17 // Version : |
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18 // |
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19 |
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20 |
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21 |
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22 #include <e32std.h> |
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23 #include <utf.h> |
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24 #include <stdlib.h> |
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25 #include <string.h> |
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26 #include <wchar.h> |
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27 #include <stdio.h> |
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28 |
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29 #include "wcharcnv.h" |
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30 |
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31 #if (defined(__SYMBIAN32__) && (defined(__WINSCW__) || defined(__WINS__))) |
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32 #include "libc_wsd_defs.h" |
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33 #endif |
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34 |
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35 #ifdef EMULATOR |
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36 |
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37 GET_STATIC_VAR_FROM_TLS(wcrtomb_mbs, mbstate_t) |
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38 #define mbs (*GET_WSD_VAR_NAME(wcrtomb_mbs, s)()) |
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39 #endif //EMULATOR |
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40 |
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41 //----------------------------------------------------------------------------- |
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42 //Function Name : size_t wcrtomb (char * mbchar, wchar_t wc, mbstate_t* ps) |
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43 //Description : Converts a wide character to a multibyte character |
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44 //Return Value : return If mbchar is null, the return value is true (non-zero) |
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45 //if multibyte characters have state-dependent encodings, or false (zero) |
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46 //if they do not. |
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47 //----------------------------------------------------------------------------- |
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48 extern "C" { |
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49 |
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50 EXPORT_C size_t wcrtomb (char * mbchar, wchar_t wc, mbstate_t* ps) |
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51 { |
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52 #ifndef EMULATOR |
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53 static mbstate_t mbs; |
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54 #endif //EMULATOR |
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55 |
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56 if (ps == NULL) |
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57 ps = &mbs; |
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58 |
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59 mbstate_t *state = NULL; |
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60 if(ps) |
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61 { |
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62 state = ps; |
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63 } |
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64 else |
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65 { |
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66 state = &mbs; |
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67 } |
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68 if (mbchar) |
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69 { |
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70 //deal with the special null character case |
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71 if (L'\0' == wc) |
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72 { |
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73 *mbchar = '\0'; |
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74 if ( state ) |
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75 { |
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76 memset(state,0,sizeof(state)); |
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77 state->__count = _EUTF16InitialState; |
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78 } |
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79 return (1); |
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80 } |
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81 |
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82 //return value of 0 is possible if the first half of a surrogate pair seen |
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83 //crash is possible if mbchar is not at least MB_CUR_MAX bytes long |
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84 return _Utf16ToUtf8(mbchar,wc, state,MB_CUR_MAX); |
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85 } |
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86 //calling with a null dest string is used to initialise shift state |
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87 //effect is exactly as if internal dst buffer was used. |
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88 //therefore we always return 1. |
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89 else |
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90 { |
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91 if ( state ) |
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92 { |
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93 memset(state,0,sizeof(state)); |
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94 state->__count = _EUTF16InitialState; |
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95 } |
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96 return (1); |
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97 } |
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98 } //end of function |
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99 |
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100 } //extern "C" |