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