Mercurial > almixer_isolated
annotate Isolated/ALmixer_RWops.c @ 61:72570fcd30e8
Fixed #define DONT_USE_VASPRINT(F) typo for Thanks to Johnson Lin for testing and reporting these issues!
Johnson Lin < arch . jslin - at - gmail . com >
author | Eric Wing <ewing . public |-at-| gmail . com> |
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date | Tue, 19 Jun 2012 00:22:40 -0700 |
parents | 208a9ed20087 |
children |
rev | line source |
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38 | 1 #ifndef ALMIXER_COMPILED_WITH_SDL |
2 | |
3 #include "ALmixer_RWops.h" | |
4 #include <stdlib.h> /* malloc, free */ | |
5 #include <stdio.h> /* fopen, fseek, fread, fclose */ | |
6 #include <string.h> /* strerror */ | |
7 #include <errno.h> /* errno */ | |
8 | |
9 /* (Note this is different than stdio's seek. This returns ftell.) | |
10 */ | |
56
208a9ed20087
Added explicit symbol visibility markers to audio support files in ALmixer for public headers so they can be built as a dynamic library if needed.
Eric Wing <ewing@anscamobile.com>
parents:
38
diff
changeset
|
11 static long stdio_seek(ALmixer_RWops* the_context, long offset, int whence) |
38 | 12 { |
13 if(0 == fseek(the_context->hidden.stdio.fp, offset, whence)) | |
14 { | |
15 return(ftell(the_context->hidden.stdio.fp)); | |
16 } | |
17 else | |
18 { | |
19 /* ALmixer_SetError("ALmixer_RWops seek failed: %s", strerror(errno)); */ | |
20 return (-1); | |
21 } | |
22 } | |
23 | |
24 static size_t stdio_read(ALmixer_RWops* the_context, void* ptr, size_t size, size_t nitems) | |
25 { | |
26 size_t bytes_read; | |
27 | |
28 bytes_read = fread(ptr, size, nitems, the_context->hidden.stdio.fp); | |
29 if(0 == bytes_read && ferror(the_context->hidden.stdio.fp)) | |
30 { | |
31 /* not sure if strerror can convert ferror */ | |
32 /* ALmixer_SetError("ALmixer_RWops read failed: %s", strerror(ferror(the_context->hidden.stdio.fp))); */ | |
33 } | |
34 return bytes_read; | |
35 } | |
36 | |
37 static size_t stdio_write(ALmixer_RWops* the_context, const void* ptr, size_t size, size_t nitems) | |
38 { | |
39 size_t bytes_written; | |
40 | |
41 bytes_written = fwrite(ptr, size, nitems, the_context->hidden.stdio.fp); | |
42 if(0 == bytes_written && ferror(the_context->hidden.stdio.fp)) | |
43 { | |
44 /* ALmixer_SetError("ALmixer_RWops write failed: %s", strerror(ferror(the_context->hidden.stdio.fp))); */ | |
45 } | |
46 return bytes_written; | |
47 } | |
48 | |
49 static int stdio_close(ALmixer_RWops* the_context) | |
50 { | |
51 int return_status = 0; | |
52 if(NULL != the_context) | |
53 { | |
54 if(0 != the_context->hidden.stdio.autoclose) | |
55 { | |
56 if(0 != fclose(the_context->hidden.stdio.fp)) | |
57 { | |
58 /* ALmixer_SetError("ALmixer_RWops close failed: %s", strerror(errno)); */ | |
59 return_status = -1; | |
60 } | |
61 } | |
62 free(the_context); | |
63 } | |
64 return return_status; | |
65 } | |
66 | |
67 ALmixer_RWops* ALmixer_RWFromFP(FILE* file_pointer, char autoclose_flag) | |
68 { | |
69 ALmixer_RWops* rw_ops = NULL; | |
70 | |
71 rw_ops = (ALmixer_RWops*)malloc(sizeof(ALmixer_RWops)); | |
72 if(NULL == rw_ops) | |
73 { | |
74 /* ALmixer_SetError("ALmixer_RWFromFP: Out of memory"); */ | |
75 return NULL; | |
76 } | |
77 | |
78 rw_ops->seek = stdio_seek; | |
79 rw_ops->read = stdio_read; | |
80 rw_ops->write = stdio_write; | |
81 rw_ops->close = stdio_close; | |
82 rw_ops->hidden.stdio.fp = file_pointer; | |
83 rw_ops->hidden.stdio.autoclose = autoclose_flag; | |
84 return rw_ops; | |
85 } | |
86 | |
87 ALmixer_RWops* ALmixer_RWFromFile(const char* file_name, const char* file_mode) | |
88 { | |
89 ALmixer_RWops* rw_ops = NULL; | |
90 FILE* file_pointer = NULL; | |
91 if(NULL == file_name || NULL == file_mode) | |
92 { | |
93 /* ALmixer_SetError("ALmixer_RWFromFile: No file or mode specified"); */ | |
94 return NULL; | |
95 } | |
96 file_pointer = fopen(file_name, file_mode); | |
97 if(NULL == file_pointer) | |
98 { | |
99 /* ALmixer_SetError("ALmixer_RWFromFile: Could not open file: %s", strerror(errno)); */ | |
100 return NULL; | |
101 } | |
102 | |
103 rw_ops = ALmixer_RWFromFP(file_pointer, 1); | |
104 return rw_ops; | |
105 } | |
106 | |
107 | |
108 #endif /* ALMIXER_COMPILED_WITH_SDL */ |