/* compiler manuals. */
#define _PDCLIB_SHRT_BYTES 2
#define _PDCLIB_INT_BYTES 4
+#ifdef __LP64__
+#define _PDCLIB_LONG_BYTES 8
+#else
#define _PDCLIB_LONG_BYTES 4
+#endif
#define _PDCLIB_LLONG_BYTES 8
/* <stdlib.h> defines the div() function family that allows taking quotient */
#define _PDCLIB_fast32 int
#define _PDCLIB_FAST32_CONV
-#define _PDCLIB_FAST64 LLONG
-#define _PDCLIB_fast64 long long
-#define _PDCLIB_FAST64_CONV ll
+#define _PDCLIB_FAST64 LONG
+#define _PDCLIB_fast64 long
+#define _PDCLIB_FAST64_CONV l
/* -------------------------------------------------------------------------- */
/* 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
+#define _PDCLIB_ptrdiff long
+#define _PDCLIB_PTRDIFF LONG
+#define _PDCLIB_PTR_CONV l
/* An integer type that can be accessed as atomic entity (think asynchronous
interrupts). The type itself is not defined in a freestanding environment,
#define _PDCLIB_SIG_ATOMIC INT
/* Result type of the 'sizeof' operator (must be unsigned) */
-#define _PDCLIB_size unsigned int
-#define _PDCLIB_SIZE UINT
+#define _PDCLIB_size unsigned long
+#define _PDCLIB_SIZE ULONG
/* Large enough an integer to hold all character codes of the largest supported
locale.
#define _PDCLIB_wchar unsigned short
#define _PDCLIB_WCHAR USHRT
-#define _PDCLIB_intptr int
-#define _PDCLIB_INTPTR INT
+/* (Signed) integer type capable of taking the (cast) value of a void *, and
+ having the value cast back to void *, comparing equal to the original.
+*/
+#define _PDCLIB_intptr long
+#define _PDCLIB_INTPTR LONG
/* Largest supported integer type. Implementation note: see _PDCLIB_atomax(). */
#define _PDCLIB_intmax long long int
/* Variable Length Parameter List Handling (<stdarg.h>)
The macros defined by <stdarg.h> are highly dependent on the calling
conventions used, and you probably have to replace them with builtins of
- your compiler. The following generic implementation works only for pure
+ your compiler.
+*/
+
+#ifdef __i386
+
+/* The following generic implementation works only for pure
stack-based architectures, and only if arguments are aligned to pointer
type. Credits to Michael Moody, who contributed this to the Public Domain.
*/
#define _PDCLIB_va_end( ap ) ( (ap) = (void *)0, (void)0 )
#define _PDCLIB_va_start( ap, parmN ) ( (ap) = (char *) &parmN + ( _PDCLIB_va_round(parmN) ), (void)0 )
+#elif __x86_64
+
+/* No way to cover x86_64 with a generic implementation, as it uses register-
+ based parameter passing. Using the GCC builtins here.
+*/
+typedef __builtin_va_list _PDCLIB_va_list;
+#define _PDCLIB_va_arg( ap, type ) ( __builtin_va_arg( ap, type ) )
+#define _PDCLIB_va_copy( dest, src ) ( __builtin_va_copy( dest, src ) )
+#define _PDCLIB_va_end( ap ) ( __builtin_va_end( ap ) )
+#define _PDCLIB_va_start( ap, parmN ) ( __builtin_va_start( ap, parmN ) )
+
+#else
+
+#error Please create your own _PDCLIB_config.h. Using the existing one as-is will not work.
+
+#endif
+
/* -------------------------------------------------------------------------- */
/* OS "glue", part 1 */
/* These are values and data type definitions that you would have to adapt to */
+++ /dev/null
-/* Internal PDCLib configuration <_PDCLIB_config.h>
- (Generic Template)
-
- This file is part of the Public Domain C Library (PDCLib).
- Permission is granted to use, modify, and / or redistribute at will.
-*/
-
-#ifndef _PDCLIB_CONFIG_H
-#define _PDCLIB_CONFIG_H _PDCLIB_CONFIG_H
-
-/* -------------------------------------------------------------------------- */
-/* Misc */
-/* -------------------------------------------------------------------------- */
-
-/* The character (sequence) your platform uses as newline. */
-#define _PDCLIB_endl "\n"
-
-/* exit() can signal success to the host environment by the value of zero or */
-/* the constant EXIT_SUCCESS. Failure is signaled by EXIT_FAILURE. Note that */
-/* any other return value is "implementation-defined", i.e. your environment */
-/* is not required to handle it gracefully. Set your definitions here. */
-#define _PDCLIB_SUCCESS 0
-#define _PDCLIB_FAILURE -1
-
-/* qsort() in <stdlib.h> requires a function that swaps two memory areas. */
-/* Below is a naive implementation that can be improved significantly for */
-/* specific platforms, e.g. by swapping int instead of char. */
-#define _PDCLIB_memswp( i, j, size ) char tmp; do { tmp = *i; *i++ = *j; *j++ = tmp; } while ( --size );
-
-/* Define this to some compiler directive that can be written after the */
-/* parameter list of a function declaration to indicate the function does */
-/* never return. If your compiler does not support such a directive, define */
-/* to nothing. (This is to avoid warnings with the exit functions under GCC.) */
-#define _PDCLIB_NORETURN __attribute__(( noreturn ))
-
-/* -------------------------------------------------------------------------- */
-/* Integers */
-/* -------------------------------------------------------------------------- */
-/* Assuming 8-bit char, two's-complement architecture here. 'short' being */
-/* 16 bit, 'int' being either 16, 32 or 64 bit, 'long' being either 32 or 64 */
-/* bit (but 64 bit only if 'int' is 32 bit), and 'long long' being 64 bit if */
-/* 'long' is not, 64 or 128 bit otherwise. */
-/* Author is quite willing to support other systems but would like to hear of */
-/* interest in such support and details on the to-be-supported architecture */
-/* first, before going to lengths about it. */
-/* -------------------------------------------------------------------------- */
-
-/* Comment out (or delete) the line below if your 'char' type is unsigned. */
-#define _PDCLIB_CHAR_SIGNED 1
-
-/* Width of the integer types short, int, long, and long long, in bytes. */
-/* SHRT == 2, INT >= SHRT, LONG >= INT >= 4, LLONG >= LONG - check your */
-/* compiler manuals. */
-#define _PDCLIB_SHRT_BYTES 2
-#define _PDCLIB_INT_BYTES 4
-#define _PDCLIB_LONG_BYTES 8
-#define _PDCLIB_LLONG_BYTES 8
-
-/* <stdlib.h> defines the div() function family that allows taking quotient */
-/* and remainder of an integer division in one operation. Many platforms */
-/* support this in hardware / opcode, and the standard permits ordering of */
-/* the return structure in any way to fit the hardware. That is why those */
-/* structs can be configured here. */
-
-struct _PDCLIB_div_t
-{
- int quot;
- int rem;
-};
-
-struct _PDCLIB_ldiv_t
-{
- long int quot;
- long int rem;
-};
-
-struct _PDCLIB_lldiv_t
-{
- long long int quot;
- long long int rem;
-};
-
-/* -------------------------------------------------------------------------- */
-/* <stdint.h> defines a set of integer types that are of a minimum width, and */
-/* "usually fastest" on the system. (If, for example, accessing a single char */
-/* requires the CPU to access a complete int and then mask out the char, the */
-/* "usually fastest" type of at least 8 bits would be int, not char.) */
-/* If you do not have information on the relative performance of the types, */
-/* the standard allows you to define any type that meets minimum width and */
-/* signedness requirements. */
-/* The defines below are just configuration for the real typedefs and limit */
-/* definitions done in <_PDCLIB_int.h>. The uppercase define shall be either */
-/* 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 LONG
-#define _PDCLIB_fast64 long
-#define _PDCLIB_FAST64_CONV l
-
-/* -------------------------------------------------------------------------- */
-/* What follows are a couple of "special" typedefs and their limits. Again, */
-/* the actual definition of the limits is done in <_PDCLIB_int.h>, and the */
-/* defines here are merely "configuration". See above for details. */
-/* -------------------------------------------------------------------------- */
-
-/* The result type of substracting two pointers */
-#define _PDCLIB_ptrdiff long
-#define _PDCLIB_PTRDIFF LONG
-#define _PDCLIB_PTR_CONV l
-
-/* An integer type that can be accessed as atomic entity (think asynchronous
- interrupts). The type itself is not defined in a freestanding environment,
- but its limits are. (Don't ask.)
-*/
-#define _PDCLIB_sig_atomic int
-#define _PDCLIB_SIG_ATOMIC INT
-
-/* Result type of the 'sizeof' operator (must be unsigned) */
-#define _PDCLIB_size unsigned long
-#define _PDCLIB_SIZE ULONG
-
-/* Large enough an integer to hold all character codes of the largest supported
- locale.
-*/
-#define _PDCLIB_wchar unsigned short
-#define _PDCLIB_WCHAR USHRT
-
-#define _PDCLIB_intptr long
-#define _PDCLIB_INTPTR LONG
-
-/* Largest supported integer type. Implementation note: see _PDCLIB_atomax(). */
-#define _PDCLIB_intmax long long int
-#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 */
-/* -------------------------------------------------------------------------- */
-
-/* Whether the implementation rounds toward zero (0), to nearest (1), toward
- positive infinity (2), or toward negative infinity (3). (-1) signifies
- indeterminable rounding, any other value implementation-specific rounding.
-*/
-#define _PDCLIB_FLT_ROUNDS -1
-
-/* Whether the implementation uses exact-width precision (0), promotes float
- to double (1), or promotes float and double to long double (2). (-1)
- signifies indeterminable behaviour, any other value implementation-specific
- behaviour.
-*/
-#define _PDCLIB_FLT_EVAL_METHOD -1
-
-/* "Number of the decimal digits (n), such that any floating-point number in the
- widest supported floating type with p(max) radix (b) digits can be rounded to
- a floating-point number with (n) decimal digits and back again without change
- to the value p(max) log(10)b if (b) is a power of 10, [1 + p(max) log(10)b]
- otherwise."
- 64bit IEC 60559 double format (53bit mantissa) is DECIMAL_DIG 17.
- 80bit IEC 60559 double-extended format (64bit mantissa) is DECIMAL_DIG 21.
-*/
-#define _PDCLIB_DECIMAL_DIG 17
-
-/* -------------------------------------------------------------------------- */
-/* Platform-dependent macros defined by the standard headers. */
-/* -------------------------------------------------------------------------- */
-
-/* The offsetof macro
- Contract: Expand to an integer constant expression of type size_t, which
- represents the offset in bytes to the structure member from the beginning
- of the structure. If the specified member is a bitfield, behaviour is
- undefined.
- There is no standard-compliant way to do this.
- This implementation casts an integer zero to 'pointer to type', and then
- takes the address of member. This is undefined behaviour but should work on
- most compilers.
-*/
-#define _PDCLIB_offsetof( type, member ) ( (size_t) &( ( (type *) 0 )->member ) )
-
-/* Variable Length Parameter List Handling (<stdarg.h>)
- No way to cover x86_64 with a generic implementation, as it uses register-
- based parameter passing. Using the GCC builtins here.
-*/
-typedef __builtin_va_list _PDCLIB_va_list;
-#define _PDCLIB_va_arg( ap, type ) ( __builtin_va_arg( ap, type ) )
-#define _PDCLIB_va_copy( dest, src ) ( __builtin_va_copy( dest, src ) )
-#define _PDCLIB_va_end( ap ) ( __builtin_va_end( ap ) )
-#define _PDCLIB_va_start( ap, parmN ) ( __builtin_va_start( ap, parmN ) )
-
-/* -------------------------------------------------------------------------- */
-/* OS "glue", part 1 */
-/* These are values and data type definitions that you would have to adapt to */
-/* the capabilities and requirements of your OS. */
-/* The actual *functions* of the OS interface are declared in _PDCLIB_glue.h. */
-/* -------------------------------------------------------------------------- */
-
-/* Memory management -------------------------------------------------------- */
-
-/* Set this to the page size of your OS. If your OS does not support paging, set
- to an appropriate value. (Too small, and malloc() will call the kernel too
- often. Too large, and you will waste memory.)
-*/
-#define _PDCLIB_PAGESIZE 4096
-
-/* Set this to the minimum memory node size. Any malloc() for a smaller size
- will be satisfied by a malloc() of this size instead (to avoid excessive
- fragmentation).
-*/
-#define _PDCLIB_MINALLOC 8
-
-/* I/O ---------------------------------------------------------------------- */
-
-/* The type of the file descriptor returned by _PDCLIB_open(). */
-typedef int _PDCLIB_fd_t;
-
-/* The value (of type _PDCLIB_fd_t) returned by _PDCLIB_open() if the operation
- failed.
-*/
-#define _PDCLIB_NOHANDLE ( (_PDCLIB_fd_t) -1 )
-
-/* 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(). 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
-
-/* 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 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
-
-/* errno -------------------------------------------------------------------- */
-
-/* These are the values that _PDCLIB_errno can be set to by the library.
-
- By keeping PDCLib's errno in the _PDCLIB_* namespace, the library is capable
- to "translate" between errno values used by the hosting operating system and
- those used and passed out by the library.
-
- Example: In the example platform, the remove() function uses the unlink()
- system call as backend. Linux sets its errno to EISDIR if you try to unlink()
- a directory, but POSIX demands EPERM. Within the remove() function, you can
- catch the 'errno == EISDIR', and set '_PDCLIB_errno = _PDCLIB_EPERM'. Anyone
- using PDCLib's <errno.h> will "see" EPERM instead of EISDIR (the _PDCLIB_*
- prefix removed by <errno.h> mechanics).
-
- If you do not want that kind of translation, you might want to "match" the
- values used by PDCLib with those used by the host OS, as to avoid confusion.
-
- The standard only defines three distinct errno values: ERANGE, EDOM, and
- EILSEQ. The standard leaves it up to "the implementation" whether there are
- any more beyond those three. There is some controversy as to whether errno is
- such a good idea at all, so you might want to come up with a different error
- reporting facility for your platform. Since errno values beyond the three
- defined by the standard are not portable anyway (unless you look at POSIX),
- having your own error reporting facility would not hurt anybody either.
-*/
-#define _PDCLIB_ERANGE 1
-#define _PDCLIB_EDOM 2
-#define _PDCLIB_EILSEQ 3
-
-/* The following is not strictly "configuration", but there is no better place
- to explain it than here.
-
- PDCLib strives to be as generic as possible, so by default it does NOT define
- any values beyond the three standard ones above, even where it would have
- been prudent and convenient to do so. Any errno "caught" from the host OS,
- and some internal error conditions as well, are all lumped together into the
- value of '_PDCLIB_ERROR'.
-
- '_PDCLIB_ERROR' is STRICLY meant as a PLACEHOLDER only.
-
- You should NEVER ship an adaption of PDCLib still using that particular
- value. You should NEVER write code that *tests* for that value. Indeed it is
- not even conforming, since errno values should be defined as beginning with
- an uppercase 'E', and there is no mechanics in <errno.h> to unmask that
- particular value (for exactly that reason).
-
- There also is no error message available for this value through either the
- strerror() or perror() functions. It is being reported as "unknown" error.
-
- The idea is that you scan the source of PDCLib for occurrences of this macro
- and replace _PDCLIB_ERROR with whatever additional errno value you came up
- with for your platform.
-
- If you cannot find it within you to do that, tell your clients to check for
- an errno value larger than zero. That, at least, would be standard compliant
- (and fully portable).
-*/
-#define _PDCLIB_ERROR 4
-
-/* The maximum value that errno can be set to. This is used to set the size */
-/* of the array in struct lconv (<locale.h>) holding error messages for the */
-/* strerror() and perror() functions. (If you change this value because you */
-/* are using additional errno values, you *HAVE* to provide appropriate error */
-/* messages for *ALL* locales.) */
-/* Default is 4 (0, ERANGE, EDOM, EILSEQ). */
-#define _PDCLIB_ERRNO_MAX 4
-
-#endif
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