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mufs: implement modes for read, write and append in mufs_open()

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This commit is contained in:
S.J.R. van Schaik 2017-06-12 12:53:20 +02:00
parent ffc8669736
commit 2c1079d0f4
2 changed files with 17 additions and 2 deletions
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13
source/fs/mufs/file.c
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@ -15,6 +15,7 @@
struct mufs_file {
struct mufs *fs;
struct mufs_tree *tree;
int mode;
uint32_t va;
};
@ -23,7 +24,7 @@ int mufs_create(struct mufs *fs, const char *path)
return mufs_mkpath(fs, path, MUFS_FILE);
}
struct mufs_file *mufs_open(struct mufs *fs, const char *path)
struct mufs_file *mufs_open(struct mufs *fs, const char *path, int mode)
{
struct mufs_file *file;
@ -35,6 +36,7 @@ struct mufs_file *mufs_open(struct mufs *fs, const char *path)
if (!(file->tree = resolve_path(fs, path)))
goto err_free_file;
file->mode = mode;
file->va = 0;
return file;
@ -59,6 +61,9 @@ size_t mufs_read(struct mufs_file *file, void *data, size_t len)
if (!file || !data || !len)
return 0;
if (!(file->mode & MUFS_READ))
return 0;
if (!(ret = mufs_tree_read(file->tree, data, file->va, len)))
return 0;
@ -74,6 +79,12 @@ size_t mufs_write(struct mufs_file *file, const void *data, size_t len)
if (!file || !data || !len)
return 0;
if (!(file->mode & MUFS_WRITE))
return 0;
if (file->mode & MUFS_APPEND)
file->va = file->tree->file_size;
if (!(ret = mufs_tree_write(file->tree, (void *)data, file->va, len)))
return 0;