diff options
Diffstat (limited to 'lib/3rdparty/tinydir.h')
| -rw-r--r-- | lib/3rdparty/tinydir.h | 548 |
1 files changed, 548 insertions, 0 deletions
diff --git a/lib/3rdparty/tinydir.h b/lib/3rdparty/tinydir.h new file mode 100644 index 0000000..db11e8e --- /dev/null +++ b/lib/3rdparty/tinydir.h @@ -0,0 +1,548 @@ +/* +Copyright (c) 2013-2014, Cong Xu, Baudouin Feildel +All rights reserved. + +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. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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. +*/ +#ifndef TINYDIR_H +#define TINYDIR_H + +#include <errno.h> +#include <stdlib.h> +#include <string.h> +#ifdef _MSC_VER +#define WIN32_LEAN_AND_MEAN +#include <windows.h> +#pragma warning (disable : 4996) +#else +#include <dirent.h> +#include <libgen.h> +#include <sys/stat.h> +#endif + + +/* types */ + +#define _TINYDIR_PATH_MAX 4096 +#ifdef _MSC_VER +/* extra chars for the "\\*" mask */ +#define _TINYDIR_PATH_EXTRA 2 +#else +#define _TINYDIR_PATH_EXTRA 0 +#endif +#define _TINYDIR_FILENAME_MAX 256 + +#ifdef _MSC_VER +#define _TINYDIR_FUNC static __inline +#else +#define _TINYDIR_FUNC static __inline__ +#endif + +typedef struct +{ + char path[_TINYDIR_PATH_MAX]; + char name[_TINYDIR_FILENAME_MAX]; + char *extension; + int is_dir; + int is_reg; + +#ifdef _MSC_VER +#else + struct stat _s; +#endif +} tinydir_file; + +typedef struct +{ + char path[_TINYDIR_PATH_MAX]; + int has_next; + size_t n_files; + + tinydir_file *_files; +#ifdef _MSC_VER + HANDLE _h; + WIN32_FIND_DATA _f; +#else + DIR *_d; + struct dirent *_e; +#endif +} tinydir_dir; + + +/* declarations */ + +_TINYDIR_FUNC +int tinydir_open(tinydir_dir *dir, const char *path); +_TINYDIR_FUNC +int tinydir_open_sorted(tinydir_dir *dir, const char *path); +_TINYDIR_FUNC +void tinydir_close(tinydir_dir *dir); + +_TINYDIR_FUNC +int tinydir_next(tinydir_dir *dir); +_TINYDIR_FUNC +int tinydir_readfile(const tinydir_dir *dir, tinydir_file *file); +_TINYDIR_FUNC +int tinydir_readfile_n(const tinydir_dir *dir, tinydir_file *file, size_t i); +_TINYDIR_FUNC +int tinydir_open_subdir_n(tinydir_dir *dir, size_t i); + +_TINYDIR_FUNC +void _tinydir_get_ext(tinydir_file *file); +_TINYDIR_FUNC +int _tinydir_file_cmp(const void *a, const void *b); + + +/* definitions*/ + +_TINYDIR_FUNC +int tinydir_open(tinydir_dir *dir, const char *path) +{ + if (dir == NULL || path == NULL || strlen(path) == 0) + { + errno = EINVAL; + return -1; + } + if (strlen(path) + _TINYDIR_PATH_EXTRA >= _TINYDIR_PATH_MAX) + { + errno = ENAMETOOLONG; + return -1; + } + + /* initialise dir */ + dir->_files = NULL; +#ifdef _MSC_VER + dir->_h = INVALID_HANDLE_VALUE; +#else + dir->_d = NULL; +#endif + tinydir_close(dir); + + strcpy(dir->path, path); +#ifdef _MSC_VER + strcat(dir->path, "\\*"); + dir->_h = FindFirstFile(dir->path, &dir->_f); + dir->path[strlen(dir->path) - 2] = '\0'; + if (dir->_h == INVALID_HANDLE_VALUE) +#else + dir->_d = opendir(path); + if (dir->_d == NULL) +#endif + { + errno = ENOENT; + goto bail; + } + + /* read first file */ + dir->has_next = 1; +#ifndef _MSC_VER + dir->_e = readdir(dir->_d); + if (dir->_e == NULL) + { + dir->has_next = 0; + } +#endif + + return 0; + +bail: + tinydir_close(dir); + return -1; +} + +_TINYDIR_FUNC +int tinydir_open_sorted(tinydir_dir *dir, const char *path) +{ + /* Count the number of files first, to pre-allocate the files array */ + size_t n_files = 0; + if (tinydir_open(dir, path) == -1) + { + return -1; + } + while (dir->has_next) + { + n_files++; + if (tinydir_next(dir) == -1) + { + goto bail; + } + } + tinydir_close(dir); + + if (tinydir_open(dir, path) == -1) + { + return -1; + } + + dir->n_files = 0; + dir->_files = (tinydir_file *)malloc(sizeof *dir->_files * n_files); + if (dir->_files == NULL) + { + errno = ENOMEM; + goto bail; + } + while (dir->has_next) + { + tinydir_file *p_file; + dir->n_files++; + + p_file = &dir->_files[dir->n_files - 1]; + if (tinydir_readfile(dir, p_file) == -1) + { + goto bail; + } + + if (tinydir_next(dir) == -1) + { + goto bail; + } + + /* Just in case the number of files has changed between the first and + second reads, terminate without writing into unallocated memory */ + if (dir->n_files == n_files) + { + break; + } + } + + qsort(dir->_files, dir->n_files, sizeof(tinydir_file), _tinydir_file_cmp); + + return 0; + +bail: + tinydir_close(dir); + return -1; +} + +_TINYDIR_FUNC +void tinydir_close(tinydir_dir *dir) +{ + if (dir == NULL) + { + return; + } + + memset(dir->path, 0, sizeof(dir->path)); + dir->has_next = 0; + dir->n_files = 0; + if (dir->_files != NULL) + { + free(dir->_files); + } + dir->_files = NULL; +#ifdef _MSC_VER + if (dir->_h != INVALID_HANDLE_VALUE) + { + FindClose(dir->_h); + } + dir->_h = INVALID_HANDLE_VALUE; +#else + if (dir->_d) + { + closedir(dir->_d); + } + dir->_d = NULL; + dir->_e = NULL; +#endif +} + +_TINYDIR_FUNC +int tinydir_next(tinydir_dir *dir) +{ + if (dir == NULL) + { + errno = EINVAL; + return -1; + } + if (!dir->has_next) + { + errno = ENOENT; + return -1; + } + +#ifdef _MSC_VER + if (FindNextFile(dir->_h, &dir->_f) == 0) +#else + dir->_e = readdir(dir->_d); + if (dir->_e == NULL) +#endif + { + dir->has_next = 0; +#ifdef _MSC_VER + if (GetLastError() != ERROR_SUCCESS && + GetLastError() != ERROR_NO_MORE_FILES) + { + tinydir_close(dir); + errno = EIO; + return -1; + } +#endif + } + + return 0; +} + +_TINYDIR_FUNC +int tinydir_readfile(const tinydir_dir *dir, tinydir_file *file) +{ + if (dir == NULL || file == NULL) + { + errno = EINVAL; + return -1; + } +#ifdef _MSC_VER + if (dir->_h == INVALID_HANDLE_VALUE) +#else + if (dir->_e == NULL) +#endif + { + errno = ENOENT; + return -1; + } + if (strlen(dir->path) + + strlen( +#ifdef _MSC_VER + dir->_f.cFileName +#else + dir->_e->d_name +#endif + ) + 1 + _TINYDIR_PATH_EXTRA >= + _TINYDIR_PATH_MAX) + { + /* the path for the file will be too long */ + errno = ENAMETOOLONG; + return -1; + } + if (strlen( +#ifdef _MSC_VER + dir->_f.cFileName +#else + dir->_e->d_name +#endif + ) >= _TINYDIR_FILENAME_MAX) + { + errno = ENAMETOOLONG; + return -1; + } + + strcpy(file->path, dir->path); + strcat(file->path, "/"); + strcpy(file->name, +#ifdef _MSC_VER + dir->_f.cFileName +#else + dir->_e->d_name +#endif + ); + strcat(file->path, file->name); +#ifndef _MSC_VER + if (stat(file->path, &file->_s) == -1) + { + return -1; + } +#endif + _tinydir_get_ext(file); + + file->is_dir = +#ifdef _MSC_VER + !!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY); +#else + S_ISDIR(file->_s.st_mode); +#endif + file->is_reg = +#ifdef _MSC_VER + !!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_NORMAL) || + ( + !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DEVICE) && + !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) && + !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_ENCRYPTED) && +#ifdef FILE_ATTRIBUTE_INTEGRITY_STREAM + !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_INTEGRITY_STREAM) && +#endif +#ifdef FILE_ATTRIBUTE_NO_SCRUB_DATA + !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_NO_SCRUB_DATA) && +#endif + !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_OFFLINE) && + !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_TEMPORARY)); +#else + S_ISREG(file->_s.st_mode); +#endif + + return 0; +} + +_TINYDIR_FUNC +int tinydir_readfile_n(const tinydir_dir *dir, tinydir_file *file, size_t i) +{ + if (dir == NULL || file == NULL) + { + errno = EINVAL; + return -1; + } + if (i >= dir->n_files) + { + errno = ENOENT; + return -1; + } + + memcpy(file, &dir->_files[i], sizeof(tinydir_file)); + _tinydir_get_ext(file); + + return 0; +} + +_TINYDIR_FUNC +int tinydir_open_subdir_n(tinydir_dir *dir, size_t i) +{ + char path[_TINYDIR_PATH_MAX]; + if (dir == NULL) + { + errno = EINVAL; + return -1; + } + if (i >= dir->n_files || !dir->_files[i].is_dir) + { + errno = ENOENT; + return -1; + } + + strcpy(path, dir->_files[i].path); + tinydir_close(dir); + if (tinydir_open_sorted(dir, path) == -1) + { + return -1; + } + + return 0; +} + +/* Open a single file given its path */ +_TINYDIR_FUNC +int tinydir_file_open(tinydir_file *file, const char *path) +{ + tinydir_dir dir; + int result = 0; + int found = 0; + char dir_name_buf[_TINYDIR_PATH_MAX]; + char file_name_buf[_TINYDIR_FILENAME_MAX]; + char *dir_name; + char *base_name; +#ifdef _MSC_VER + char drive_buf[_TINYDIR_PATH_MAX]; + char ext_buf[_TINYDIR_FILENAME_MAX]; +#endif + + if (file == NULL || path == NULL || strlen(path) == 0) + { + errno = EINVAL; + return -1; + } + if (strlen(path) + _TINYDIR_PATH_EXTRA >= _TINYDIR_PATH_MAX) + { + errno = ENAMETOOLONG; + return -1; + } + + /* Get the parent path */ +#ifdef _MSC_VER + if (_splitpath_s( + path, + drive_buf, sizeof drive_buf, + dir_name_buf, sizeof dir_name_buf, + file_name_buf, sizeof file_name_buf, + ext_buf, sizeof ext_buf)) + { + errno = EINVAL; + return -1; + } + /* Concatenate the drive letter and dir name to form full dir name */ + strcat(drive_buf, dir_name_buf); + dir_name = drive_buf; + /* Concatenate the file name and extension to form base name */ + strcat(file_name_buf, ext_buf); + base_name = file_name_buf; +#else + strcpy(dir_name_buf, path); + dir_name = dirname(dir_name_buf); + strcpy(file_name_buf, path); + base_name = basename(file_name_buf); +#endif + + /* Open the parent directory */ + if (tinydir_open(&dir, dir_name) == -1) + { + return -1; + } + + /* Read through the parent directory and look for the file */ + while (dir.has_next) + { + if (tinydir_readfile(&dir, file) == -1) + { + result = -1; + goto bail; + } + if (strcmp(file->name, base_name) == 0) + { + /* File found */ + found = 1; + goto bail; + } + tinydir_next(&dir); + } + if (!found) + { + result = -1; + errno = ENOENT; + } + +bail: + tinydir_close(&dir); + return result; +} + +_TINYDIR_FUNC +void _tinydir_get_ext(tinydir_file *file) +{ + char *period = strrchr(file->name, '.'); + if (period == NULL) + { + file->extension = &(file->name[strlen(file->name)]); + } + else + { + file->extension = period + 1; + } +} + +_TINYDIR_FUNC +int _tinydir_file_cmp(const void *a, const void *b) +{ + const tinydir_file *fa = (const tinydir_file *)a; + const tinydir_file *fb = (const tinydir_file *)b; + if (fa->is_dir != fb->is_dir) + { + return -(fa->is_dir - fb->is_dir); + } + return strncmp(fa->name, fb->name, _TINYDIR_FILENAME_MAX); +} + +#endif |