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Diffstat (limited to 'src/gfile/gfile.h')
-rw-r--r-- | src/gfile/gfile.h | 470 |
1 files changed, 470 insertions, 0 deletions
diff --git a/src/gfile/gfile.h b/src/gfile/gfile.h new file mode 100644 index 00000000..f332db4c --- /dev/null +++ b/src/gfile/gfile.h @@ -0,0 +1,470 @@ +/* + * This file is subject to the terms of the GFX License. If a copy of + * the license was not distributed with this file, you can obtain one at: + * + * http://ugfx.org/license.html + */ + +/** + * @file src/gfile/gfile.h + * @brief GFILE - File IO Routines header file. + * + * @addtogroup GFILE + * + * @brief Module which contains Operating system independent FILEIO + * + * @{ + */ + +#ifndef _GFILE_H +#define _GFILE_H + +#include "gfx.h" + +#if GFX_USE_GFILE || defined(__DOXYGEN__) + +/*===========================================================================*/ +/* Type definitions */ +/*===========================================================================*/ + +/** + * @brief A file pointer + */ + +typedef struct GFILE GFILE; +typedef struct gfileList gfileList; + +extern GFILE *gfileStdIn; +extern GFILE *gfileStdErr; +extern GFILE *gfileStdOut; + +/*===========================================================================*/ +/* External declarations. */ +/*===========================================================================*/ + +#ifdef __cplusplus +extern "C" { +#endif + + /** + * @brief Check if file exists + * + * @param[in] fname The file name + * + * @return TRUE if file exists, FALSE otherwise + * + * @api + */ + bool_t gfileExists(const char *fname); + + /** + * @brief Delete file + * + * @param[in] fname The file name + * + * @return TRUE on success, FALSE otherwise + * + * @api + */ + bool_t gfileDelete(const char *fname); + + /** + * @brief Get the size of a file + * @note Please use @p gfileGetSize() if the file is opened + * + * @param[in] fname The file name + * + * @return File size on success, -1 on error + * + * @api + */ + long int gfileGetFilesize(const char *fname); + + /** + * @brief Rename file + * + * @param[in] oldname The current file name + * @param[in] newname The new name of the file + * + * @return TRUE on success, FALSE otherwise + * + * @api + */ + bool_t gfileRename(const char *oldname, const char *newname); + + /** + * @brief Open file + * @details A file must be opened before it can be accessed + * @details The resulting GFILE will be used for all functions that access the file. + * + * @param[in] fname The file name + * @param[in] mode The mode. + * + * @return Valid GFILE on success, 0 otherwise + * + * @note The modes follow the c library fopen() standard. + * The valid modes are: + * <ul><li>r - Open for read, the file must exist</li> + * <li>w - Open for write, the file is truncated if it exists</li> + * <li>wx - Open for write, the file must not exist</li> + * <li>a - Open for append, the file is truncated if it exists</li> + * <li>ax - Open for append, the file must not exists</li> + * </ul> + * The following flags can also be added to the above modes:<br/> + * <ul><li>+ - Open for both read and write</li> + * <li>b - Open as a binary file rather than a text file</li> + * </ul> + * @note Not all file-systems support all modes. For example, write + * is not available with the ROM file-system. Similarly few platforms + * distinguish between binary and text files. + * @note Even though binary vs. text is relevant only for a small number of platforms + * the "b" flag should always be specified for binary files such as images. + * This ensures portability to other platforms. The extra flag will be ignored + * on platforms where it is not relevant. + * + * @api + */ + GFILE * gfileOpen(const char *fname, const char *mode); + + /** + * @brief Close file + * @details Closes a file after is has been opened using @p gfileOpen() + * + * @param[in] f The file + * + * @api + */ + void gfileClose(GFILE *f); + + /** + * @brief Read from file + * @details Reads a given amount of bytes from the file + * @details The read/write cursor will not be reset when calling this function + * + * @param[in] f The file + * @param[out] buf The buffer in which to save the content that has been read from the file + * @param[in] len Amount of bytes to read + * + * @return Amount of bytes read + * + * @api + */ + size_t gfileRead(GFILE *f, void *buf, size_t len); + + /** + * @brief Write to file + * @details Write a given amount of bytes to the file + * @details The read/write cursor will not be reset when calling this function + * + * @param[in] f The file + * @param[in] buf The buffer which contains the content that will be written to the file + * @param[in] len Amount of bytes to write + * + * @return Amount of bytes written + * + * @api + */ + size_t gfileWrite(GFILE *f, const void *buf, size_t len); + + /** + * @brief Get the current position of the read/write cursor + * + * @param[in] f The file + * + * @return The current position in the file + * + * @api + */ + long int gfileGetPos(GFILE *f); + + /** + * @brief Set the position of the read/write cursor + * + * @param[in] f The file + * @param[in] pos The position to which the cursor will be set + * + * @return TRUE on success, FALSE otherwise + * + * @api + */ + bool_t gfileSetPos(GFILE *f, long int pos); + + /** + * @brief Get the size of file + * @note Please use @p gfileGetFilesize() if the file is not opened + * + * @param[in] f The file + * + * @return The size of the file + * + * @api + */ + long int gfileGetSize(GFILE *f); + + /** + * @brief Check for EOF + * @details Checks if the cursor is at the end of the file + * + * @param[in] f The file + * + * @return TRUE if EOF, FALSE otherwise + * + * @api + */ + bool_t gfileEOF(GFILE *f); + + /** + * @brief Mount a logical drive (aka partition) + * + * @details Not supported by every file system + * @details Currently just one drive at one is supported. + * + * @param[in] fs The file system (F for FatFS) + * @param[in] drive The logical drive prefix + * + * @return TRUE on success, FALSE otherwise + * + * @api + */ + bool_t gfileMount(char fs, const char *drive); + + /** + * @brief Unmount a logical drive (aka partition) + * + * @details Does have no effect if @p gfileMount() as been called before hand + * + * @param[in] fs The file system (F for FatFS) + * @param[in] drive The logical drive prefix + * + * @return TRUE on success, FALSE otherwise + * + * @api + */ + bool_t gfileUnmount(char fs, const char *drive); + + /** + * @brief Syncs the file object (flushes the buffer) + * + * @details Not supported by every file system + * + * @param[in] f The file + * + * @return TRUE on success, FALSE otherwise + * + * @api + */ + bool_t gfileSync(GFILE *f); + + #if GFILE_NEED_FILELISTS || defined(__DOXYGEN__) + /** + * @brief Open a file list + * + * @param[in] fs The file system (F for FatFS) + * @param[in] path Path information to pass to the file system + * @param[in] dirs Pass TRUE to get directories only, FALSE to get files only + * + * @return A pointer to a file list on success, NULL otherwise + * + * @note The path parameter is handled in a file-system specific way. It could be + * treated as a directory name, it may be treated as a file pattern, or it + * may be ignored. Passing NULL will always return the full list of files + * in at least the top level directory. + * @note For file systems that do not support directories, passing TRUE for dirs + * will return an error. + * @note You must call @p gfileCloseFileList() when you have finished with the + * file list in order to free resources. + * + * @api + */ + gfileList *gfileOpenFileList(char fs, const char *path, bool_t dirs); + + /** + * @brief Get the next file in a file list. + * + * @param[in] pfl Pointer to a file list returned by @p gfileOpenFileList() + * + * @return A pointer to a file (or directory) name. Returns NULL if there are no more. + * + * @note The file name may contain the full directory path or may not depending + * on how the file system treats directories. + * @note The returned buffer may be destroyed by the next call to any of + * @p gfileOpenFileList(), @p gfileReadFileList() or @p gfileCloseFileList(). + * Do not use this pointer after one of those calls. + * + * @api + */ + const char *gfileReadFileList(gfileList *pfl); + + /** + * @brief Close a file list. + * + * @param[in] pfl Pointer to a file list returned by @p gfileOpenFileList() + * + * @api + */ + void gfileCloseFileList(gfileList *pfl); + #endif + + #if (GFILE_NEED_CHIBIOSFS && GFX_USE_OS_CHIBIOS) || defined(__DOXYGEN__) + /** + * @brief Open file from a ChibiOS BaseFileStream + * + * @param[in] BaseFileStreamPtr The BaseFileStream to open as a GFILE + * @param[in] mode The mode. + * + * @return Valid GFILE on success, 0 otherwise + * + * @note The modes are the same modes as in @p gfileOpen(). The + * open mode is NOT compared against the BaseFileStream capabilities. + * @note Supported operations are: read, write, getpos, setpos, eof and getsize + * + * @api + */ + GFILE * gfileOpenBaseFileStream(void *BaseFileStreamPtr, const char *mode); + #endif + + #if GFILE_NEED_MEMFS || defined(__DOXYGEN__) + /** + * @brief Open file from a memory pointer + * + * @param[in] memptr The pointer to the memory + * @param[in] mode The mode. + * + * @return Valid GFILE on success, 0 otherwise + * + * @note The modes are the same modes as in @p gfileOpen(). Note there is + * no concept of file-size. Be careful not to overwrite other memory or + * to read from inaccessible sections of memory. + * @note Supported operations are: read, write, getpos, setpos + * + * @api + */ + GFILE * gfileOpenMemory(void *memptr, const char *mode); + #endif + + #if GFILE_NEED_STRINGS || defined(__DOXYGEN__) + /** + * @brief Open file from a null terminated C string + * + * @param[in] str The pointer to the string or string buffer + * @param[in] mode The mode + * + * @return Valid GFILE on success, 0 otherwise + * + * @note The modes are the same modes as in @p gfileOpen(). Note there is + * no concept of file-size. Be careful not to overwrite other memory or + * to read from inaccessible sections of memory. + * @note Reading will return EOF when the NULL character is reached. + * @note Writing will always place a NULL in the next character effectively terminating the + * string at the character just written. + * @note Supported operations are: read, write, append, getpos, setpos + * @note Be careful with setpos and getpos. They do not check for the end of the string. + * @note Reading and Writing will read/write a maximum of one character at a time. + * + * @api + */ + GFILE * gfileOpenString(char *str, const char *mode); + #endif + + #if GFILE_NEED_PRINTG || defined(__DOXYGEN__) + #include <stdarg.h> + + int vfnprintg(GFILE *f, int maxlen, const char *fmt, va_list arg); + int fnprintg(GFILE *f, int maxlen, const char *fmt, ...); + #define vfprintg(f,m,a) vfnprintg(f,0,m,a) + #define fprintg(f,m,...) fnprintg(f,0,m,...) + #define vprintg(m,a) vfnprintg(gfileStdOut,0,m,a) + #define printg(m,...) fnprintg(gfileStdOut,0,m,...) + + #if GFILE_NEED_STRINGS + int vsnprintg(char *buf, int maxlen, const char *fmt, va_list arg); + int snprintg(char *buf, int maxlen, const char *fmt, ...); + #define vsprintg(s,m,a) vsnprintg(s,0,m,a) + #define sprintg(s,m,...) snprintg(s,0,m,...) + #endif + #endif + + #if GFILE_NEED_SCANG || defined(__DOXYGEN__) + #include <stdarg.h> + + int vfscang(GFILE *f, const char *fmt, va_list arg); + int fscang(GFILE *f, const char *fmt, ...); + #define vscang(f,a) vfscang(gfileStdIn,f,a) + #define scang(f,...) fscang(gfileStdIn,f,...) + + #if GFILE_NEED_STRINGS + int vsscang(const char *buf, const char *fmt, va_list arg); + int sscang(const char *buf, const char *fmt, ...); + #endif + #endif + + #if GFILE_NEED_STDIO && !defined(GFILE_IMPLEMENTATION) + #define stdin gfileStdIn + #define stdout gfileStdOut + #define stderr gfileStdErr + #define FILENAME_MAX 256 // Use a relatively small number for an embedded platform + #define L_tmpnam FILENAME_MAX + #define FOPEN_MAX GFILE_MAX_GFILES + #define TMP_MAX GFILE_MAX_GFILES + #define P_tmpdir "/tmp/" + #define FILE GFILE + #define fopen(n,m) gfileOpen(n,m) + #define fclose(f) gfileClose(f) + size_t gstdioRead(void * ptr, size_t size, size_t count, FILE *f); + size_t gstdioWrite(const void * ptr, size_t size, size_t count, FILE *f); + #define fread(p,sz,cnt,f) gstdioRead(p,sz,cnt,f) + #define fwrite(p,sz,cnt,f) gstdioWrite(p,sz,cnt,f) + int gstdioSeek(FILE *f, size_t offset, int origin); + #define fseek(f,ofs,org) gstdioSeek(f,ofs,org) + #define SEEK_SET 0 + #define SEEK_CUR 1 + #define SEEK_END 2 + #define remove(n) (!gfileDelete(n)) + #define rename(o,n) (!gfileRename(o,n)) + #define fflush(f) (0) + #define ftell(f) gfileGetPos(f) + #define fpos_t long int + int gstdioGetpos(FILE *f, long int *pos); + #define fgetpos(f,pos) gstdioGetpos(f,pos) + #define fsetpos(f, pos) (!gfileSetPos(f, *pos)) + #define rewind(f) gfileSetPos(f, 0); + #define feof(f) gfileEOF(f) + + #define vfprintf(f,m,a) vfnprintg(f,0,m,a) + #define fprintf(f,m,...) fnprintg(f,0,m,...) + #define vprintf(m,a) vfnprintg(gfileStdOut,0,m,a) + #define printf(m,...) fnprintg(gfileStdOut,0,m,...) + #define vsnprintf(s,n,m,a) vsnprintg(s,n,m,a) + #define snprintf(s,n,m,...) snprintg(s,n,m,...) + #define vsprintf(s,m,a) vsnprintg(s,0,m,a) + #define sprintf(s,m,...) snprintg(s,0,m,...) + //TODO + //void clearerr ( FILE * stream ); + //int ferror ( FILE * stream ); + //FILE * tmpfile ( void ); // Auto-deleting + //char * tmpnam ( char * str ); + //char * mktemp (char *template); + //FILE * freopen ( const char * filename, const char * mode, FILE * stream ); + //setbuf + //setvbuf + //fflush + //fgetc + //fgets + //fputc + //fputs + //getc + //getchar + //puts + //ungetc + //void perror (const char * str); + #endif + +#ifdef __cplusplus +} +#endif + +#endif /* GFX_USE_GFILE */ + +#endif /* _GFILE_H */ +/** @} */ + |