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Add comments and documentation, rework open mode logic

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This commit is contained in:
Mikhail Romanko
2024-06-08 12:06:56 +03:00
parent 79874622a2
commit fd39ee8692
4 changed files with 136 additions and 51 deletions
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31
src/file_posix.c
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@@ -3,6 +3,9 @@
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
static const bh_io_table_t bh_file_table = {
(int (*)(struct bh_io_s *, int)) bh_file_open_base,
@@ -88,23 +91,33 @@ int bh_file_open_base(bh_file_t *file,
return BH_INVALID;
/* Determine open mode */
switch (mode & BH_IO_MASK)
switch (mode & (BH_IO_CREATE | BH_IO_OPEN))
{
case BH_IO_OPEN: break;
case BH_IO_CREATE: open_flags |= O_CREAT | O_EXCL; break;
case BH_IO_APPEND: open_flags |= O_CREAT | O_APPEND; break;
case BH_IO_TRUNCATE: open_flags |= O_CREAT | O_TRUNC; break;
default:
return BH_NO_IMPL;
case 0: open_flags |= O_CREAT; break;
case BH_IO_CREATE: open_flags |= O_CREAT | O_EXCL; break;
case BH_IO_OPEN: /* Do nothing */ break;
}
if (mode & BH_IO_APPEND)
open_flags |= O_APPEND;
if (mode & BH_IO_TRUNCATE)
open_flags |= O_TRUNC;
/* Open file */
file->handle = open(file->path, open_flags, open_mode);
/* Check for errors */
if (file->handle == -1)
return BH_ERROR;
{
switch (errno)
{
case EEXIST: return BH_FOUND;
case ENOENT: return BH_NOT_FOUND;
default: return BH_ERROR;
}
}
return BH_OK;
}
@@ -210,7 +223,7 @@ int bh_file_seek_base(bh_file_t *file,
return BH_ERROR;
/* Seek to desired location */
if (lseek(file->handle, pos, dir) == -1);
if (lseek(file->handle, pos, dir) == -1)
return BH_ERROR;
return BH_OK;