#define _PDCLIB_INT8_MAX _PDCLIB_CHAR_MAX
#define _PDCLIB_INT8_MIN _PDCLIB_CHAR_MIN
#define _PDCLIB_UINT8_MAX _PDCLIB_UCHAR_MAX
-#define _PDCLIB_INT8_LITERAL
-#define _PDCLIB_UINT8_LITERAL
#else
#error Unsupported width of char (not 8 bits).
#endif
#define _PDCLIB_INT16_MAX _PDCLIB_INT_MAX
#define _PDCLIB_INT16_MIN _PDCLIB_INT_MIN
#define _PDCLIB_UINT16_MAX _PDCLIB_UINT_MAX
-#define _PDCLIB_INT16_LITERAL
-#define _PDCLIB_UINT16_LITERAL
#elif _PDCLIB_SHRT_BYTES == 2
typedef signed short _PDCLIB_int16_t;
typedef unsigned short _PDCLIB_uint16_t;
#define _PDCLIB_INT16_MAX _PDCLIB_SHRT_MAX
#define _PDCLIB_INT16_MIN _PDCLIB_SHRT_MIN
#define _PDCLIB_UINT16_MAX _PDCLIB_USHRT_MAX
-#define _PDCLIB_INT16_LITERAL s
-#define _PDCLIB_UINT16_LITERAL us
#else
#error Neither 'short' nor 'int' are 16-bit.
#endif
/* Various <stdio.h> internals */
/* -------------------------------------------------------------------------- */
-/* Flags for representing mode (see fopen()). */
-#define _PDCLIB_FREAD 1
-#define _PDCLIB_FWRITE 2
-#define _PDCLIB_FAPPEND 4
-#define _PDCLIB_FRW 8
-#define _PDCLIB_FBIN 16
+/* Flags for representing mode (see fopen()). Note these must fit the same
+ status field as the _IO?BF flags in <stdio.h> and the internal flags below.
+*/
+#define _PDCLIB_FREAD 8u
+#define _PDCLIB_FWRITE 16u
+#define _PDCLIB_FAPPEND 32u
+#define _PDCLIB_FRW 64u
+#define _PDCLIB_FBIN 128u
+
+/* Internal flags, made to fit the same status field as the flags above. */
+#define _PDCLIB_LIBBUFFER 512u
+#define _PDCLIB_ERRORFLAG 1024u
+#define _PDCLIB_EOFFLAG 2048u
+#define _PDCLIB_WIDESTREAM 4096u
+#define _PDCLIB_BYTESTREAM 8192u
+
+/* Position / status structure for getpos() / fsetpos(). */
+struct _PDCLIB_fpos_t
+{
+ _PDCLIB_uint64_t offset; /* File position offset */
+ int status; /* Multibyte parsing state (unused, reserved) */
+};
+/* FILE structure */
struct _PDCLIB_file_t
{
- _PDCLIB_fd_t handle; /* OS-specific file descriptor */
- _PDCLIB_fpos_t position; /* file position indicator */
- void * buffer; /* file buffer */
- _PDCLIB_size_t bufsize; /* size of buffer */
- unsigned int status; /* misc. status bits */
- /*mbstate_t mbstate; multibyte parse state - TODO: Unmask. */
- struct _PDCLIB_file_t * next; /* provisions for linked list handling */
+ _PDCLIB_fd_t handle; /* OS file handle */
+ char * buffer; /* Pointer to buffer memory */
+ _PDCLIB_size_t bufsize; /* Size of buffer */
+ _PDCLIB_size_t bufidx; /* Index of current position in buffer */
+ _PDCLIB_size_t bufend; /* Index of last pre-read character in buffer */
+ struct _PDCLIB_fpos_t pos; /* Offset and multibyte parsing state */
+ _PDCLIB_size_t ungetidx; /* Number of ungetc()'ed characters */
+ unsigned char * ungetbuf; /* ungetc() buffer */
+ unsigned int status; /* Status flags; see above */
+ /* multibyte parsing status to be added later */
+ char * filename; /* Name the current stream has been opened with */
+ struct _PDCLIB_file_t * next; /* Pointer to next struct (internal) */
};
/* -------------------------------------------------------------------------- */
/* Two helper functions used by strtol(), strtoul() and long long variants. */
const char * _PDCLIB_strtox_prelim( const char * p, char * sign, int * base );
-_PDCLIB_uintmax_t _PDCLIB_strtox_main( const char ** p, unsigned int base, _PDCLIB_uintmax_t error, _PDCLIB_uintmax_t limval, _PDCLIB_uintmax_t limdigit, char * sign );
+_PDCLIB_uintmax_t _PDCLIB_strtox_main( const char ** p, unsigned int base, _PDCLIB_uintmax_t error, _PDCLIB_uintmax_t limval, int limdigit, char * sign );
/* Digits arrays used by various integer conversion functions */
extern char _PDCLIB_digits[];
Returns a pointer to the first character not parsed as conversion specifier.
*/
const char * _PDCLIB_print( const char * spec, struct _PDCLIB_status_t * status );
+
+/* Parsing any fopen() style filemode string into a number of flags. */
+unsigned int _PDCLIB_filemode( const char * mode );
+
+/* Sanity checking and preparing of read buffer, should be called first thing
+ by any stdio read-data function.
+ Returns 0 on success, EOF on error.
+ On error, EOF / error flags and errno are set appropriately.
+*/
+int _PDCLIB_prepread( struct _PDCLIB_file_t * stream );
+
+/* Sanity checking, should be called first thing by any stdio write-data
+ function.
+ Returns 0 on success, EOF on error.
+ On error, error flags and errno are set appropriately.
+*/
+int _PDCLIB_prepwrite( struct _PDCLIB_file_t * stream );
+
+/* -------------------------------------------------------------------------- */
+/* errno */
+/* -------------------------------------------------------------------------- */
+
+extern int _PDCLIB_errno;
+int * _PDCLIB_errno_func( void );
+
+/* ERANGE and EDOM are specified by the standard. */
+#define _PDCLIB_ERANGE 1
+#define _PDCLIB_EDOM 2
+/* Used in the example implementation for any kind of I/O error. */
+#define _PDCLIB_EIO 3
+/* Used in the example implementation for "unknown error". */
+#define _PDCLIB_EUNKNOWN 4
+/* Used in the example implementation for "invalid parameter value". */
+#define _PDCLIB_EINVAL 5
+/* Used in the example implementation for "I/O retries exceeded". */
+#define _PDCLIB_ERETRY 6
+
projects / pdclib / blobdiff