mirror of https://github.com/PCSX2/pcsx2.git
179 lines
4.9 KiB
C
179 lines
4.9 KiB
C
|
/*
|
||
|
zip_source_file_stdio.c -- read-only stdio file source implementation
|
||
|
Copyright (C) 2020 Dieter Baron and Thomas Klausner
|
||
|
|
||
|
This file is part of libzip, a library to manipulate ZIP archives.
|
||
|
The authors can be contacted at <info@libzip.org>
|
||
|
|
||
|
Redistribution and use in source and binary forms, with or without
|
||
|
modification, are permitted provided that the following conditions
|
||
|
are met:
|
||
|
1. Redistributions of source code must retain the above copyright
|
||
|
notice, this list of conditions and the following disclaimer.
|
||
|
2. Redistributions in binary form must reproduce the above copyright
|
||
|
notice, this list of conditions and the following disclaimer in
|
||
|
the documentation and/or other materials provided with the
|
||
|
distribution.
|
||
|
3. The names of the authors may not be used to endorse or promote
|
||
|
products derived from this software without specific prior
|
||
|
written permission.
|
||
|
|
||
|
THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
|
||
|
OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
||
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
|
||
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
|
||
|
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
|
||
|
IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
||
|
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
|
||
|
IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
*/
|
||
|
|
||
|
#include "zipint.h"
|
||
|
|
||
|
#include "zip_source_file.h"
|
||
|
#include "zip_source_file_stdio.h"
|
||
|
|
||
|
#include <fcntl.h>
|
||
|
#include <stdio.h>
|
||
|
#include <stdlib.h>
|
||
|
#include <sys/stat.h>
|
||
|
|
||
|
#ifdef _WIN32
|
||
|
#ifndef S_IWUSR
|
||
|
#define S_IWUSR _S_IWRITE
|
||
|
#endif
|
||
|
#endif
|
||
|
|
||
|
/* clang-format off */
|
||
|
static zip_source_file_operations_t ops_stdio_read = {
|
||
|
_zip_stdio_op_close,
|
||
|
NULL,
|
||
|
NULL,
|
||
|
NULL,
|
||
|
NULL,
|
||
|
_zip_stdio_op_read,
|
||
|
NULL,
|
||
|
NULL,
|
||
|
_zip_stdio_op_seek,
|
||
|
_zip_stdio_op_stat,
|
||
|
NULL,
|
||
|
_zip_stdio_op_tell,
|
||
|
NULL
|
||
|
};
|
||
|
/* clang-format on */
|
||
|
|
||
|
|
||
|
ZIP_EXTERN zip_source_t *
|
||
|
zip_source_filep(zip_t *za, FILE *file, zip_uint64_t start, zip_int64_t len) {
|
||
|
if (za == NULL) {
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
return zip_source_filep_create(file, start, len, &za->error);
|
||
|
}
|
||
|
|
||
|
|
||
|
ZIP_EXTERN zip_source_t *
|
||
|
zip_source_filep_create(FILE *file, zip_uint64_t start, zip_int64_t length, zip_error_t *error) {
|
||
|
if (file == NULL || length < ZIP_LENGTH_UNCHECKED) {
|
||
|
zip_error_set(error, ZIP_ER_INVAL, 0);
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
return zip_source_file_common_new(NULL, file, start, length, NULL, &ops_stdio_read, NULL, error);
|
||
|
}
|
||
|
|
||
|
|
||
|
void
|
||
|
_zip_stdio_op_close(zip_source_file_context_t *ctx) {
|
||
|
fclose((FILE *)ctx->f);
|
||
|
}
|
||
|
|
||
|
|
||
|
zip_int64_t
|
||
|
_zip_stdio_op_read(zip_source_file_context_t *ctx, void *buf, zip_uint64_t len) {
|
||
|
size_t i;
|
||
|
if (len > SIZE_MAX) {
|
||
|
len = SIZE_MAX;
|
||
|
}
|
||
|
|
||
|
if ((i = fread(buf, 1, (size_t)len, ctx->f)) == 0) {
|
||
|
if (ferror((FILE *)ctx->f)) {
|
||
|
zip_error_set(&ctx->error, ZIP_ER_READ, errno);
|
||
|
return -1;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return (zip_int64_t)i;
|
||
|
}
|
||
|
|
||
|
|
||
|
bool
|
||
|
_zip_stdio_op_seek(zip_source_file_context_t *ctx, void *f, zip_int64_t offset, int whence) {
|
||
|
#if ZIP_FSEEK_MAX > ZIP_INT64_MAX
|
||
|
if (offset > ZIP_FSEEK_MAX || offset < ZIP_FSEEK_MIN) {
|
||
|
zip_error_set(&ctx->error, ZIP_ER_SEEK, EOVERFLOW);
|
||
|
return false;
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
if (fseeko((FILE *)f, (off_t)offset, whence) < 0) {
|
||
|
zip_error_set(&ctx->error, ZIP_ER_SEEK, errno);
|
||
|
return false;
|
||
|
}
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
|
||
|
bool
|
||
|
_zip_stdio_op_stat(zip_source_file_context_t *ctx, zip_source_file_stat_t *st) {
|
||
|
struct stat sb;
|
||
|
|
||
|
int ret;
|
||
|
|
||
|
if (ctx->fname) {
|
||
|
ret = stat(ctx->fname, &sb);
|
||
|
}
|
||
|
else {
|
||
|
ret = fstat(fileno((FILE *)ctx->f), &sb);
|
||
|
}
|
||
|
|
||
|
if (ret < 0) {
|
||
|
if (errno == ENOENT) {
|
||
|
st->exists = false;
|
||
|
return true;
|
||
|
}
|
||
|
zip_error_set(&ctx->error, ZIP_ER_READ, errno);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
st->size = (zip_uint64_t)sb.st_size;
|
||
|
st->mtime = sb.st_mtime;
|
||
|
|
||
|
st->regular_file = S_ISREG(sb.st_mode);
|
||
|
st->exists = true;
|
||
|
|
||
|
/* We're using UNIX file API, even on Windows; thus, we supply external file attributes with Unix values. */
|
||
|
/* TODO: This could be improved on Windows by providing Windows-specific file attributes */
|
||
|
ctx->attributes.valid = ZIP_FILE_ATTRIBUTES_HOST_SYSTEM | ZIP_FILE_ATTRIBUTES_EXTERNAL_FILE_ATTRIBUTES;
|
||
|
ctx->attributes.host_system = ZIP_OPSYS_UNIX;
|
||
|
ctx->attributes.external_file_attributes = (((zip_uint32_t)sb.st_mode) << 16) | ((sb.st_mode & S_IWUSR) ? 0 : 1);
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
|
||
|
zip_int64_t
|
||
|
_zip_stdio_op_tell(zip_source_file_context_t *ctx, void *f) {
|
||
|
off_t offset = ftello((FILE *)f);
|
||
|
|
||
|
if (offset < 0) {
|
||
|
zip_error_set(&ctx->error, ZIP_ER_SEEK, errno);
|
||
|
}
|
||
|
|
||
|
return offset;
|
||
|
}
|