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1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 ******************************************************************************
5 *
6 *   Copyright (C) 1997-2011, International Business Machines
7 *   Corporation and others.  All Rights Reserved.
8 *
9 ******************************************************************************
10 *
11 * File FILESTRM.C
12 *
13 * @author       Glenn Marcy
14 *
15 * Modification History:
16 *
17 *   Date        Name        Description
18 *   5/8/98      gm          Created
19 *  03/02/99     stephen     Reordered params in ungetc to match stdio
20 *                           Added wopen
21 *   3/29/99     helena      Merged Stephen and Bertrand's changes.
22 *
23 ******************************************************************************
24 */
25 
26 #include "filestrm.h"
27 
28 #include "cmemory.h"
29 
30 #include <stdio.h>
31 
32 U_CAPI FileStream* U_EXPORT2
T_FileStream_open(const char * filename,const char * mode)33 T_FileStream_open(const char* filename, const char* mode)
34 {
35     if(filename != NULL && *filename != 0 && mode != NULL && *mode != 0) {
36         FILE *file = fopen(filename, mode);
37         return (FileStream*)file;
38     } else {
39         return NULL;
40     }
41 }
42 
43 /*
44 U_CAPI FileStream* U_EXPORT2
45 T_FileStream_wopen(const wchar_t* filename, const wchar_t* mode)
46 {
47    // TBD: _wfopen is believed to be MS-specific?
48 #if U_PLATFORM_USES_ONLY_WIN32_API
49     FILE* result = _wfopen(filename, mode);
50     return (FileStream*)result;
51 #else
52     size_t fnMbsSize, mdMbsSize;
53     char *fn, *md;
54     FILE *result;
55 
56     // convert from wchar_t to char
57     fnMbsSize = wcstombs(NULL, filename, ((size_t)-1) >> 1);
58     fn = (char*)uprv_malloc(fnMbsSize+2);
59     wcstombs(fn, filename, fnMbsSize);
60     fn[fnMbsSize] = 0;
61 
62     mdMbsSize = wcstombs(NULL, mode, ((size_t)-1) >> 1);
63     md = (char*)uprv_malloc(mdMbsSize+2);
64     wcstombs(md, mode, mdMbsSize);
65     md[mdMbsSize] = 0;
66 
67     result = fopen(fn, md);
68     uprv_free(fn);
69     uprv_free(md);
70     return (FileStream*)result;
71 #endif
72 }
73 */
74 U_CAPI void U_EXPORT2
T_FileStream_close(FileStream * fileStream)75 T_FileStream_close(FileStream* fileStream)
76 {
77     if (fileStream != 0)
78         fclose((FILE*)fileStream);
79 }
80 
81 U_CAPI UBool U_EXPORT2
T_FileStream_file_exists(const char * filename)82 T_FileStream_file_exists(const char* filename)
83 {
84     FILE* temp = fopen(filename, "r");
85     if (temp) {
86         fclose(temp);
87         return TRUE;
88     } else
89         return FALSE;
90 }
91 
92 /*static const int32_t kEOF;
93 const int32_t FileStream::kEOF = EOF;*/
94 
95 /*
96 U_CAPI FileStream*
97 T_FileStream_tmpfile()
98 {
99     FILE* file = tmpfile();
100     return (FileStream*)file;
101 }
102 */
103 
104 U_CAPI int32_t U_EXPORT2
T_FileStream_read(FileStream * fileStream,void * addr,int32_t len)105 T_FileStream_read(FileStream* fileStream, void* addr, int32_t len)
106 {
107     return static_cast<int32_t>(fread(addr, 1, len, (FILE*)fileStream));
108 }
109 
110 U_CAPI int32_t U_EXPORT2
T_FileStream_write(FileStream * fileStream,const void * addr,int32_t len)111 T_FileStream_write(FileStream* fileStream, const void* addr, int32_t len)
112 {
113 
114     return static_cast<int32_t>(fwrite(addr, 1, len, (FILE*)fileStream));
115 }
116 
117 U_CAPI void U_EXPORT2
T_FileStream_rewind(FileStream * fileStream)118 T_FileStream_rewind(FileStream* fileStream)
119 {
120     rewind((FILE*)fileStream);
121 }
122 
123 U_CAPI int32_t U_EXPORT2
T_FileStream_putc(FileStream * fileStream,int32_t ch)124 T_FileStream_putc(FileStream* fileStream, int32_t ch)
125 {
126     int32_t c = fputc(ch, (FILE*)fileStream);
127     return c;
128 }
129 
130 U_CAPI int U_EXPORT2
T_FileStream_getc(FileStream * fileStream)131 T_FileStream_getc(FileStream* fileStream)
132 {
133     int c = fgetc((FILE*)fileStream);
134     return c;
135 }
136 
137 U_CAPI int32_t U_EXPORT2
T_FileStream_ungetc(int32_t ch,FileStream * fileStream)138 T_FileStream_ungetc(int32_t ch, FileStream* fileStream)
139 {
140 
141     int32_t c = ungetc(ch, (FILE*)fileStream);
142     return c;
143 }
144 
145 U_CAPI int32_t U_EXPORT2
T_FileStream_peek(FileStream * fileStream)146 T_FileStream_peek(FileStream* fileStream)
147 {
148     int32_t c = fgetc((FILE*)fileStream);
149     return ungetc(c, (FILE*)fileStream);
150 }
151 
152 U_CAPI char* U_EXPORT2
T_FileStream_readLine(FileStream * fileStream,char * buffer,int32_t length)153 T_FileStream_readLine(FileStream* fileStream, char* buffer, int32_t length)
154 {
155     return fgets(buffer, length, (FILE*)fileStream);
156 }
157 
158 U_CAPI int32_t U_EXPORT2
T_FileStream_writeLine(FileStream * fileStream,const char * buffer)159 T_FileStream_writeLine(FileStream* fileStream, const char* buffer)
160 {
161     return fputs(buffer, (FILE*)fileStream);
162 }
163 
164 U_CAPI int32_t U_EXPORT2
T_FileStream_size(FileStream * fileStream)165 T_FileStream_size(FileStream* fileStream)
166 {
167     int32_t savedPos = ftell((FILE*)fileStream);
168     int32_t size = 0;
169 
170     /*Changes by Bertrand A. D. doesn't affect the current position
171     goes to the end of the file before ftell*/
172     fseek((FILE*)fileStream, 0, SEEK_END);
173     size = (int32_t)ftell((FILE*)fileStream);
174     fseek((FILE*)fileStream, savedPos, SEEK_SET);
175     return size;
176 }
177 
178 U_CAPI int U_EXPORT2
T_FileStream_eof(FileStream * fileStream)179 T_FileStream_eof(FileStream* fileStream)
180 {
181     return feof((FILE*)fileStream);
182 }
183 
184 /*
185  Warning
186  This function may not work consistently on all platforms
187  (e.g. HP-UX, FreeBSD and MacOSX don't return an error when
188  putc is used on a file opened as readonly)
189 */
190 U_CAPI int U_EXPORT2
T_FileStream_error(FileStream * fileStream)191 T_FileStream_error(FileStream* fileStream)
192 {
193     return (fileStream == 0 || ferror((FILE*)fileStream));
194 }
195 
196 /* This function doesn't work. */
197 /* force the stream to set its error flag*/
198 /*U_CAPI void U_EXPORT2
199 T_FileStream_setError(FileStream* fileStream)
200 {
201     fseek((FILE*)fileStream, 99999, SEEK_SET);
202 }
203 */
204 
205 U_CAPI FileStream* U_EXPORT2
T_FileStream_stdin(void)206 T_FileStream_stdin(void)
207 {
208     return (FileStream*)stdin;
209 }
210 
211 U_CAPI FileStream* U_EXPORT2
T_FileStream_stdout(void)212 T_FileStream_stdout(void)
213 {
214     return (FileStream*)stdout;
215 }
216 
217 
218 U_CAPI FileStream* U_EXPORT2
T_FileStream_stderr(void)219 T_FileStream_stderr(void)
220 {
221     return (FileStream*)stderr;
222 }
223 
224 U_CAPI UBool U_EXPORT2
T_FileStream_remove(const char * fileName)225 T_FileStream_remove(const char* fileName){
226     return (remove(fileName) == 0);
227 }
228