/* Misc */
/* -------------------------------------------------------------------------- */
-/* By default, PDCLib does some rather strict checking of function usage, */
-/* especially in <stdio.h>. Things that are undefined by the standard - for */
-/* example, mixing byte / wide operations or read / write operations without */
-/* resetting the stream beforehand - are caught and handled graciously. This */
-/* adds some complexity, and eats a couple of clock cycles. If you want to */
-/* disable these checks, define _PDCLIB_STRICT to zero. */
-#define _PDCLIB_STRICT 1
-
/* The character (sequence) your platform uses as newline. */
#define _PDCLIB_endl "\n"
/* SHRT, INT, LONG, or LLONG (telling which values to use for the *_MIN and */
/* *_MAX limits); the lowercase define either short, int, long, or long long */
/* (telling the actual type to use). */
+/* The third define is the length modifier used for the type in printf() and */
+/* scanf() functions (used in <inttypes.h>). */
/* If you require a non-standard datatype to define the "usually fastest" */
/* types, PDCLib as-is doesn't support that. Please contact the author with */
/* details on your platform in that case, so support can be added. */
#define _PDCLIB_FAST8 INT
#define _PDCLIB_fast8 int
+#define _PDCLIB_FAST8_CONV
#define _PDCLIB_FAST16 INT
#define _PDCLIB_fast16 int
+#define _PDCLIB_FAST16_CONV
#define _PDCLIB_FAST32 INT
#define _PDCLIB_fast32 int
+#define _PDCLIB_FAST32_CONV
#define _PDCLIB_FAST64 LLONG
#define _PDCLIB_fast64 long long
+#define _PDCLIB_FAST64_CONV ll
/* -------------------------------------------------------------------------- */
/* What follows are a couple of "special" typedefs and their limits. Again, */
/* The result type of substracting two pointers */
#define _PDCLIB_ptrdiff int
#define _PDCLIB_PTRDIFF INT
+#define _PDCLIB_PTR_CONV
/* An integer type that can be accessed as atomic entity (think asynchronous
interrupts). The type itself is not defined in a freestanding environment,
/* Largest supported integer type. Implementation note: see _PDCLIB_atomax(). */
#define _PDCLIB_intmax long long int
-#define _PDCLIB_INTMAX LLINT
+#define _PDCLIB_INTMAX LLONG
+#define _PDCLIB_MAX_CONV ll
/* You are also required to state the literal suffix for the intmax type */
#define _PDCLIB_INTMAX_LITERAL ll
+/* <inttypes.h> defines imaxdiv(), which is equivalent to the div() function */
+/* family (see further above) with intmax_t as basis. */
+
+struct _PDCLIB_imaxdiv_t
+{
+ _PDCLIB_intmax quot;
+ _PDCLIB_intmax rem;
+};
+
/* -------------------------------------------------------------------------- */
/* Floating Point */
/* -------------------------------------------------------------------------- */
*/
#define _PDCLIB_NOHANDLE ( (_PDCLIB_fd_t) -1 )
-/* A type in which to store file offsets. See fgetpos() / fsetpos(). */
-/* FIXME: The 'int' types here are placeholders. When changed, check out
- stdinit.c, too. */
-typedef struct
-{
- int position;
- int mbstate;
-} _PDCLIB_fpos_t;
-
/* The default size for file buffers. Must be at least 256. */
#define _PDCLIB_BUFSIZ 1024
/* The minimum number of files the implementation can open simultaneously. Must
be at least 8. Depends largely on how the bookkeeping is done by fopen() /
- freopen() / fclose().
+ freopen() / fclose(). The example implementation limits the number of open
+ files only by available memory.
*/
#define _PDCLIB_FOPEN_MAX 8
/* Length of the longest filename the implementation guarantees to support. */
#define _PDCLIB_FILENAME_MAX 128
-/* Buffer size for tmpnam(). */
-#define _PDCLIB_L_tmpnam 100
+/* Maximum length of filenames generated by tmpnam(). (See tmpfile.c.) */
+#define _PDCLIB_L_tmpnam 46
/* Number of distinct file names that can be generated by tmpnam(). */
#define _PDCLIB_TMP_MAX 50
-/* The number of times fflush() tries to write a file buffer before giving up
- if no characters can be written.
+/* The values of SEEK_SET, SEEK_CUR and SEEK_END, used by fseek().
+ Since at least one platform (POSIX) uses the same symbols for its own "seek"
+ function, we use whatever the host defines (if it does define them).
+*/
+#define _PDCLIB_SEEK_SET 0
+#define _PDCLIB_SEEK_CUR 1
+#define _PDCLIB_SEEK_END 2
+
+/* The number of characters that can be buffered with ungetc(). The standard
+ guarantees only one (1); anything larger would make applications relying on
+ this capability dependent on implementation-defined behaviour (not good).
+*/
+#define _PDCLIB_UNGETCBUFSIZE 1
+
+/* Signals ------------------------------------------------------------------ */
+
+/* A word on signals, to the people using PDCLib in their OS projects.
+
+ The way they are defined by the C standard severely limits their usefulness,
+ to the point where a library implementation need not interface with the OS'
+ signals at all (which is what the PDCLib example implementation does).
+ (Other issues include, for example, that signal handlers are not re-entrant.)
+
+ Thus, it is strongly discouraged to try bolting on a signal handling infra-
+ structure onto <signal.h>. Since C's signal handling is so limited to begin
+ with, and code using it is pretty much non-portable anyway, it would be
+ smarter to keep <signal.h> in the barely functional state it is in, and
+ instead create a better, OS-specific API.
+
+ That being said, the below signals require to be defined to a positive int
+ value. I took what my Linux box defined them to; if you have to change them,
+ and what value to change them *to*, depends heavily on your environment and
+ what you are expecting <signal.h> to accomplish (see above).
*/
-#define _PDCLIB_FLUSH_RETRIES 3
-/* This macro is executed after each try to write characters that results in
- no characters being written. You can define this to be empty, wait a short
- period of time, or whatever suits your environment.
+#define _PDCLIB_SIGABRT 6
+#define _PDCLIB_SIGFPE 8
+#define _PDCLIB_SIGILL 4
+#define _PDCLIB_SIGINT 2
+#define _PDCLIB_SIGSEGV 11
+#define _PDCLIB_SIGTERM 15
+
+/* The following should be defined to pointer values that could NEVER point to
+ a valid function. (They are used as special arguments to signal().) Again, I
+ took the values of my Linux box, which should be as good as any other value.
*/
-#define _PDCLIB_FLUSH_RETRY_PREP
+#define _PDCLIB_SIG_DFL (void (*)( int ))0
+#define _PDCLIB_SIG_ERR (void (*)( int ))-1
+#define _PDCLIB_SIG_IGN (void (*)( int ))1
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