/**
* slibc — Yet another C library
* Copyright © 2015, 2016 Mattias Andrée (maandree@member.fsf.org)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _STDIO_H
#define _STDIO_H
#include <slibc/version.h>
#include <slibc/features.h>
#define __NEED_fpos_t /* TODO not implemented */
#define __NEED_off_t
#define __NEED_size_t
#define __NEED_ssize_t
#define __NEED_wchar_t
#define __NEED_va_list
#if defined(__C11__)
# define __NEED_max_align_t
#endif
#define FILE void /* TODO temporary */
#include <bits/types.h>
/* TODO implement I/O */
int fflush(FILE*);
#define stdin ((void*)1) /* TODO temporary */
#define stdout ((void*)2) /* TODO temporary */
#define stderr ((void*)3) /* TODO temporary */
/**
* This function is identical to `fprintf` with
* `stdout` as the first argument.
*
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written bytes.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` bytes are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `fwrite`.
*
* @since Always.
*/
int printf(const char* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(1), __format__(__slibc_printf__, 1, 2))));
/**
* Print a formatted string to a stream.
*
* TODO list format rules for fprintf
*
* @param stream The output stream.
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written bytes.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` bytes are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `fwrite`.
*
* @since Always.
*/
int fprintf(FILE* restrict, const char* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(1, 2), __format__(__slibc_printf__, 2, 3))));
#if defined(__SLIBC_SOURCE)
/**
* This function is identical to `fprintf`,
* except it does not lock the stream.
*
* This is a slibc extension.
*
* @param stream The output stream.
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written bytes.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` bytes are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `fwrite_unlocked`.
*
* @since Always.
*/
int fprintf_unlocked(FILE* restrict, const char* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(1, 2), __format__(__slibc_printf__, 2, 3))));
#endif
/**
* This function is identical to `fprintf`,
* except it is limited to file descriptor-backed
* streams, and uses the file descriptor as the
* first argument rather than the stream.
*
* @param fd The file descriptor.
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written bytes.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` bytes are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `write`.
*
* @since Always.
*/
int dprintf(int, const char* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(2), __format__(__slibc_printf__, 2, 3))));
#if defined(__SLIBC_SOURCE)
/**
* This function is identical to `dprintf`,
* except it uses `send` instead of `write`
* and supports transmissions flags.
*
* This is a slibc extension added for completeness.
*
* @param fd The file descriptor.
* @param flags Flags to pass to `send`, see `send`
* for more information.
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written bytes.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` bytes are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `write`.
*
* @since Always.
*/
int sockprintf(int, int, const char* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(3), __format__(__slibc_printf__, 3, 4))));
#endif
/**
* This function is identical to `fprintf`,
* it prints to a buffer rather than a stream.
*
* This is identical to `snprintf` with
* `SIZE_MAX` as the second argument.
*
* `sprintf` is(!) safe to use. As long as you allocate
* the a large enough buffer. One way to do this is
* by measuring the length of the result first.
*
* ssize_t n;
* char* buffer = NULL;
* snprintf(NULL, 0, "%zu%zn", your_value, &n);
* buffer = malloc((size_t)n * sizeof(char));
* if (buffer == NULL) goto fail;
* sprintf(buffer, "%zu", your_value);
*
* If you don't care about portability, you can use
* `asprintf`, `asprintfa` or `bprintf`. However, you
* often do not need to measure the result with `snprintf`.
* A maximum possible length can often be determined
* at compile-time or only using `strlen'.
*
* char buffer[3 * sizeof(ssize_t) + 2]; // A very poor, but still safe,
* // approximation to log₁₀.
* spritnf(buffer, "%zi", your_signed_value);
*
* These techniques guarantees that all of the string is
* written, and is therefore preferable over replacing
* `sprintf` with `snprintf`. Because of this, slibc
* does not consider `sprintf` unsafe like some of the
* more hokey C standard library implementations. This
* is C damn it!
*
* “Almost anything can be unsafe if you don't use it properly.”
*
* @param buffer The output buffer.
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written bytes, excluding
* the NUL byte. On error, a negative value
* (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* bytes are written; in slibc, `INT_MAX`
* is returned if more is written, you can
* use "%zn" to find the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
*
* @since Always.
*/
int sprintf(char* restrict, const char* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(1, 2), __format__(__slibc_printf__, 2, 3))));
/**
* This function is identical to `sprintf`,
* expect it truncates the output.
*
* @param buffer The output buffer.
* @param size The allocation size of `buffer`.
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written bytes, excluding
* the NUL byte, that would have been written
* if `size` was ignored. On error, a negative
* value (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* bytes would have been written; in slibc,
* `INT_MAX` is returned if more would have
* been written, you can use "%zn" to find the
* actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
*
* @since Always.
*/
int snprintf(char* restrict, size_t, const char* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(3), __format__(__slibc_printf__, 3, 4))));
/* TODO plan9: char* seprintf(char* start, char* end, const char* restrict format, ...)
~= start + snprintf(start, end - start, format, ...)
TODO plan9: char* smprintf(const char* restrict format, ...)
~= asprintf(&r, format, ...), r;
*/
#if defined(__GNU_SOURCE)
/**
* This function is identical to `sprintf`,
* except it allocates a sufficiently large
* buffer.
*
* This is a GNU extension.
*
* @param buffer Output parameter for the output buffer.
* On error the content of this pointer is undefined.
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written bytes, excluding
* the NUL byte. On error, a negative value
* (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* bytes are written; in slibc, `INT_MAX`
* is returned if more is written, you can
* use "%zn" to find the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws ENOMEM The process cannot allocation the
* sufficient amount of memory.
*
* @since Always.
*/
int asprintf(char** restrict, const char* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(1, 2), __format__(__slibc_printf__, 2, 3), __warn_unused_result__)));
#endif
#if defined(__SLIBC_SOURCE)
# if defined(__GNUC__)
/**
* This function is identical to `sprintf`,
* except it allocates a sufficiently large
* buffer to the stack (using `alloca`.)
*
* This is a slibc extension. It is only available
* if compiling with GCC.
*
* There is no `vasprintfa` function.
*
* @param buffer:char** Output parameter for the output buffer,
* must not be `NULL`. On error the content
* of this pointer is either `NULL` or a
* pointer to memory allocated with `alloca`.
* @param format:char* The formatting-string, must not have
* side-effects or be `NULL`.
* @param ... The formatting-arguments, must not have
* side-effects.
* @return :int The number of written bytes, excluding
* the NUL byte. On error, a negative value
* (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* bytes are written; in slibc, `INT_MAX`
* is returned if more is written, you can
* use "%zn" to find the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
*
* @since Always.
*/
#define asprintfa(buffer, format, ...) \
({ \
ssize_t __size; \
int __r; \
__r = snprintf(NULL, 0, format "%zn", ##__VA_ARGS__, &__size); \
if (*buffer = NULL, __size += 1, __r >= 0) \
*buffer = __builtin_alloca((size_t)__size * sizeof(char)), \
__r = sprintf(*buffer, format, ##__VA_ARGS__); \
__r; \
})
# endif
/**
* This function is identical to `asprintf`,
* except it can reuse allocated buffers.
*
* This is a slibc extension.
*
* @param buffer Reference parameter for the output buffer.
* It should point to the buffer than shall
* be used, or point to `NULL` if a new buffer
* shall be allocated. It will be updated with
* a new buffer if it points to `NULL`, or the
* new pointer if `buffer` needed to be reallocated.
* On error, this pointer will only have been
* updated if the buffer was reallocated during
* the call; if it pointed to `NULL`, it will
* still point to `NULL`.
* @param size Reference parameter for the buffer size.
* It shall point to a variable whose value is
* the allocation size of `*buffer`, or point to
* a variable whose value is zero if `*buffer`
* is `NULL`.
* @param offset The offset in the buffer where the function
* shall start the printing.
* @param secure Non-zero if the function must override the
* buffer with zero before freeing it if it
* creates a new allocation.
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written bytes, excluding
* the NUL byte. On error, a negative value
* (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* bytes are written; in slibc, `INT_MAX`
* is returned if more is written, you can
* use "%zn" to find the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws ENOMEM The process cannot allocation the
* sufficient amount of memory.
*
* @since Always.
*/
int bprintf(char** restrict, size_t* restrict, size_t, int, const char* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(1, 2, 5), __format__(__slibc_printf__, 5, 6), __warn_unused_result__)));
#endif
/**
* This function is identical to `printf`,
* except it uses `va_list` instead of variadic argument.
*
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written bytes.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` bytes are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `fwrite`.
*
* @since Always.
*/
int vprintf(const char* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(1))));
/**
* This function is identical to `fprintf`,
* except it uses `va_list` instead of variadic argument.
*
* @param stream The output stream.
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written bytes.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` bytes are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `fwrite`.
*
* @since Always.
*/
int vfprintf(FILE* restrict, const char* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(1, 2))));
#if defined(__SLIBC_SOURCE)
/**
* This function is identical to `fprintf_unlocked`,
* except it uses `va_list` instead of variadic argument.
*
* This is a slibc extension.
*
* @param stream The output stream.
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written bytes.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` bytes are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `fwrite_unlocked`.
*
* @since Always.
*/
int vfprintf_unlocked(FILE* restrict, const char* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(1, 2))));
#endif
/**
* This function is identical to `dprintf`,
* except it uses `va_list` instead of variadic argument.
*
* @param fd The file descriptor.
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written bytes.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` bytes are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `write`.
*
* @since Always.
*/
int vdprintf(int, const char* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(2))));
#if defined(__SLIBC_SOURCE)
/**
* This function is identical to `sockprintf`,
* except it uses `va_list` instead of variadic argument.
*
* This is a slibc extension added for completeness.
*
* @param fd The file descriptor.
* @param flags Flags to pass to `send`, see `send`
* for more information.
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written bytes.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` bytes are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `write`.
*
* @since Always.
*/
int vsockprintf(int, int, const char* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(3))));
#endif
/**
* This function is identical to `sprintf`,
* except it uses `va_list` instead of variadic argument.
*
* @param buffer The output buffer.
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written bytes, excluding
* the NUL byte. On error, a negative value
* (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* bytes are written; in slibc, `INT_MAX`
* is returned if more is written, you can
* use "%zn" to find the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
*
* @since Always.
*/
int vsprintf(char* restrict, const char* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(1, 2))));
/**
* This function is identical to `snprintf`,
* except it uses `va_list` instead of variadic argument.
*
* @param buffer The output buffer.
* @param size The allocation size of `buffer`.
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written bytes, excluding
* the NUL byte, that would have been written
* if `size` was ignored. On error, a negative
* value (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* bytes would have been written; in slibc,
* `INT_MAX` is returned if more would have
* been written, you can use "%zn" to find the
* actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
*
* @since Always.
*/
int vsnprintf(char* restrict, size_t, const char* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(3))));
/* TODO plan9: char* vseprintf(char* start, char* end, const char* restrict format, va_list args)
~= start + vsnprintf(start, end - start, format, args)
TODO plan9: char* vsmprintf(const char* restrict format, va_list args)
~= vasprintf(&r, format, args), r;
*/
#if defined(__GNU_SOURCE)
/**
* This function is identical to `asprintf`,
* except it uses `va_list` instead of variadic argument.
*
* This is a GNU extension.
*
* @param buffer Output parameter for the output buffer.
* On error the content of this pointer is undefined.
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written bytes, excluding
* the NUL byte. On error, a negative value
* (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* bytes are written; in slibc, `INT_MAX`
* is returned if more is written, you can
* use "%zn" to find the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws ENOMEM The process cannot allocation the
* sufficient amount of memory.
*
* @since Always.
*/
int vasprintf(char** restrict, const char* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(1, 2), __warn_unused_result__)));
#endif
#if defined(__SLIBC_SOURCE)
/**
* This function is identical to `bprintf`,
* except it uses `va_list` instead of variadic argument.
*
* This is a slibc extension.
*
* @param buffer Reference parameter for the output buffer.
* It should point to the buffer than shall
* be used, or point to `NULL` if a new buffer
* shall be allocated. It will be updated with
* a new buffer if it points to `NULL`, or the
* new pointer if `buffer` needed to be reallocated.
* On error, this pointer will only have been
* updated if the buffer was reallocated during
* the call; if it pointed to `NULL`, it will
* still point to `NULL`.
* @param size Reference parameter for the buffer size.
* It shall point to a variable whose value is
* the allocation size of `*buffer`, or point to
* a variable whose value is zero if `*buffer`
* is `NULL`.
* @param offset The offset in the buffer where the function
* shall start the printing.
* @param secure Non-zero if the function must override the
* buffer with zero before freeing it if it
* creates a new allocation.
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written bytes, excluding
* the NUL byte. On error, a negative value
* (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* bytes are written; in slibc, `INT_MAX`
* is returned if more is written, you can
* use "%zn" to find the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws ENOMEM The process cannot allocation the
* sufficient amount of memory.
*
* @since Always.
*/
int vbprintf(char** restrict, size_t* restrict, size_t, int, const char* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(1, 2, 5), __warn_unused_result__)));
#endif
#if !defined(__PORTABLE) /* wchar_t is not portable. */
/**
* This function is identical to `printf` except
* it uses wide characters.
*
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written characters.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` characters are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `fwrite`.
*
* @since Always.
*/
int wprintf(const wchar_t* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(1))));
/**
* This function is identical to `fprintf` except
* it uses wide characters.
*
* @param stream The output stream.
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written characters.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` characters are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `fwrite`.
*
* @since Always.
*/
int fwprintf(FILE* restrict, const wchar_t* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(1, 2))));
# if defined(__SLIBC_SOURCE)
/**
* This function is identical to `fprintf_unlocked` except
* it uses wide characters.
*
* This is a slibc extension added for completeness.
*
* @param stream The output stream.
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written characters.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` characters are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `fwrite_unlocked`.
*
* @since Always.
*/
int fwprintf_unlocked(FILE* restrict, const wchar_t* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(1, 2))));
/**
* This function is identical to `dprintf` except
* it uses wide characters.
*
* This is a slibc extension added for completeness.
*
* @param fd The file descriptor.
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written characters.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` characters are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `write`.
*
* @since Always.
*/
int dwprintf(int, const wchar_t* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(2))));
/**
* This function is identical to `sockprintf`
* except it uses wide characters.
*
* This is a slibc extension added for completeness.
*
* @param fd The file descriptor.
* @param flags Flags to pass to `send`, see `send`
* for more information.
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written bytes.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` bytes are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `write`.
*
* @since Always.
*/
int sockwprintf(int, int, const wchar_t* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(3))));
# endif
/**
* This function is identical to `snprintf`
* (not `sprintf`) except it uses wide characters.
*
* @param buffer The output buffer.
* @param size The allocation size of `buffer`.
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written characters, excluding
* the NUL character, that would have been written
* if `size` was ignored. On error, a negative
* value (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* characters would have been written; in slibc,
* `INT_MAX` is returned if more would have
* been written, you can use "%zn" to find the
* actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
*
* @since Always.
*/
int swprintf(wchar_t* restrict, size_t, const wchar_t* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(3))));
/* TODO plan9 derived: char* sewprintf(wchar_t* start, wchar_t* end, const wchar_t* restrict format, ...)
~= start + swprintf(start, end - start, format, ...)
TODO plan9 derived: char* smwprintf(const wchar_t* restrict format, ...)
~= aswprintf(&r, format, ...), r;
*/
# if defined(__GNU_SOURCE) && defined(__SLIBC_SOURCE)
/**
* This function is identical to `aswprintf` except
* it uses wide characters.
*
* This is a slibc extension added for completeness.
* This is only available if GNU extensions are enabled.
*
* @param buffer Output parameter for the output buffer.
* On error the content of this pointer is undefined.
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written characters, excluding
* the NUL character. On error, a negative value
* (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* characters are written; in slibc, `INT_MAX`
* is returned if more is written, you can
* use "%zn" to find the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws ENOMEM The process cannot allocation the
* sufficient amount of memory.
*
* @since Always.
*/
int aswprintf(wchar_t** restrict, const wchar_t* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(1, 2), __warn_unused_result__)));
# endif
# if defined(__SLIBC_SOURCE)
# if defined(__GNUC__)
/**
* This function is identical to `swprintf`,
* except it allocates a sufficiently large
* buffer to the stack (using `alloca`.)
*
* This is a slibc extension. It is only available
* if compiling with GCC.
*
* There is no `vaswprintfa` function.
*
* @param buffer:char** Output parameter for the output buffer,
* must not be `NULL`. On error the content
* of this pointer is either `NULL` or a
* pointer to memory allocated with `alloca`.
* @param format:char* The formatting-string, must not have
* side-effects or be `NULL`.
* @param ... The formatting-arguments, must not have
* side-effects.
* @return :int The number of written bytes, excluding
* the NUL byte. On error, a negative value
* (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* bytes are written; in slibc, `INT_MAX`
* is returned if more is written, you can
* use "%zn" to find the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
*
* @since Always.
*/
#define aswprintfa(buffer, format, ...) \
({ \
ssize_t __size; \
int __r; \
__r = swprintf(NULL, 0, format "%zn", ##__VA_ARGS__, &__size); \
if (*buffer = NULL, __size += 1, __r >= 0) \
*buffer = __builtin_alloca((size_t)__size * sizeof(wchar_t)), \
__r = swprintf(*buffer, (size_t)__size, format, ##__VA_ARGS__); \
__r; \
})
# endif
/**
* This function is identical to `bprintf` except
* it uses wide characters.
*
* This is a slibc extension added for completeness.
*
* @param buffer Reference parameter for the output buffer.
* It should point to the buffer than shall
* be used, or point to `NULL` if a new buffer
* shall be allocated. It will be updated with
* a new buffer if it points to `NULL`, or the
* new pointer if `buffer` needed to be reallocated.
* On error, this pointer will only have been
* updated if the buffer was reallocated during
* the call; if it pointed to `NULL`, it will
* still point to `NULL`.
* @param size Reference parameter for the buffer size,
* in `wchar_t`.
* It shall point to a variable whose value is
* the allocation size of `*buffer`, or point to
* a variable whose value is zero if `*buffer`
* is `NULL`.
* @param offset The offset in the buffer where the function
* shall start the printing.
* @param secure Non-zero if the function must override the
* buffer with zero before freeing it if it
* creates a new allocation.
* @param format The formatting-string.
* @param ... The formatting-arguments.
* @return The number of written characters, excluding
* the NUL character. On error, a negative value
* (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* characters are written; in slibc, `INT_MAX`
* is returned if more is written, you can
* use "%zn" to find the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws ENOMEM The process cannot allocation the
* sufficient amount of memory.
*
* @since Always.
*/
int bwprintf(wchar_t** restrict, size_t* restrict, size_t, int, const wchar_t* restrict, ...)
__GCC_ONLY(__attribute__((__nonnull__(1, 2, 5), __warn_unused_result__)));
# endif
/**
* This function is identical to `wprintf`,
* except it uses `va_list` instead of variadic argument.
*
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written characters.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` characters are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `fwrite`.
*
* @since Always.
*/
int vwprintf(const wchar_t* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(1))));
/**
* This function is identical to `fwprintf`,
* except it uses `va_list` instead of variadic argument.
*
* @param stream The output stream.
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written characters.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` characters are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `fwrite`.
*
* @since Always.
*/
int vfwprintf(FILE* restrict, const wchar_t* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(1, 2))));
# if defined(__SLIBC_SOURCE)
/**
* This function is identical to `fwprintf_unlocked`,
* except it uses `va_list` instead of variadic argument.
*
* This is a slibc extension added for completeness.
*
* @param stream The output stream.
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written characters.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` characters are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `fwrite_unlocked`.
*
* @since Always.
*/
int vfwprintf_unlocked(FILE* restrict, const wchar_t* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(1, 2))));
/**
* This function is identical to `dwprintf`,
* except it uses `va_list` instead of variadic argument.
*
* This is a slibc extension added for completeness.
*
* @param fd The file descriptor.
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written characters.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` characters are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `write`.
*
* @since Always.
*/
int vdwprintf(int, const wchar_t* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(2))));
/**
* This function is identical to `sockwprintf`
* except it uses `va_list` instead of variadic argument.
*
* This is a slibc extension added for completeness.
*
* @param fd The file descriptor.
* @param flags Flags to pass to `send`, see `send`
* for more information.
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written bytes.
* On error, a negative value (namely -1
* in this implementation) is returned.
* It is unspecified what shall happen if
* more than `INT_MAX` bytes are written;
* in slibc, `INT_MAX` is returned if more
* is written, you can use "%zn" to find
* the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws Any error specified for `write`.
*
* @since Always.
*/
int vsockwprintf(int, int, const wchar_t* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(3))));
# endif
/**
* This function is identical to `swprintf`,
* except it uses `va_list` instead of variadic argument.
*
* @param buffer The output buffer.
* @param size The allocation size of `buffer`.
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written characters, excluding
* the NUL character, that would have been written
* if `size` was ignored. On error, a negative
* value (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* characters would have been written; in slibc,
* `INT_MAX` is returned if more would have
* been written, you can use "%zn" to find the
* actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
*
* @since Always.
*/
int vswprintf(wchar_t* restrict, size_t, const wchar_t* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(3))));
/* TODO plan9 derived: char* vsewprintf(wchar_t* start, wchar_t* end, const wchar_t* restrict format, va_list args)
~= start + vswprintf(start, end - start, format, args)
TODO plan9 derived: char* vsmwprintf(const wchar_t* restrict format, va_list args)
~= vaswprintf(&r, format, args), r;
*/
# if defined(__GNU_SOURCE) && defined(__SLIBC_SOURCE)
/**
* This function is identical to `aswprintf`,
* except it uses `va_list` instead of variadic argument.
*
* This is a slibc extension added for completeness.
* This is only available if GNU extensions are enabled.
*
* @param buffer Output parameter for the output buffer.
* On error the content of this pointer is undefined.
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written characters, excluding
* the NUL character. On error, a negative value
* (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* characters are written; in slibc, `INT_MAX`
* is returned if more is written, you can
* use "%zn" to find the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws ENOMEM The process cannot allocation the
* sufficient amount of memory.
*
* @since Always.
*/
int vaswprintf(wchar_t** restrict, const wchar_t* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(1, 2), __warn_unused_result__)));
# endif
# if defined(__SLIBC_SOURCE)
/**
* This function is identical to `bwprintf`,
* except it uses `va_list` instead of variadic argument.
*
* This is a slibc extension added for completeness.
*
* @param buffer Reference parameter for the output buffer.
* It should point to the buffer than shall
* be used, or point to `NULL` if a new buffer
* shall be allocated. It will be updated with
* a new buffer if it points to `NULL`, or the
* new pointer if `buffer` needed to be reallocated.
* On error, this pointer will only have been
* updated if the buffer was reallocated during
* the call; if it pointed to `NULL`, it will
* still point to `NULL`.
* @param size Reference parameter for the buffer size,
* in `wchar_t`.
* It shall point to a variable whose value is
* the allocation size of `*buffer`, or point to
* a variable whose value is zero if `*buffer`
* is `NULL`.
* @param offset The offset in the buffer where the function
* shall start the printing.
* @param secure Non-zero if the function must override the
* buffer with zero before freeing it if it
* creates a new allocation.
* @param format The formatting-string.
* @param args The formatting-arguments.
* @return The number of written characters, excluding
* the NUL character. On error, a negative value
* (namely -1 in this implementation) is
* returned. It is unspecified what shall
* happen if more than `INT_MAX` non-NUL
* characters are written; in slibc, `INT_MAX`
* is returned if more is written, you can
* use "%zn" to find the actual length.
*
* @throws EINVAL `format` contained unsupported formatting codes.
* @throws ENOMEM The process cannot allocation the
* sufficient amount of memory.
*
* @since Always.
*/
int vbwprintf(wchar_t** restrict, size_t* restrict, size_t, int, const wchar_t* restrict, va_list)
__GCC_ONLY(__attribute__((__nonnull__(1, 2, 5), __warn_unused_result__)));
# endif
#endif
/**
* This function is identical to `fscanf` with
* `stdout` as the first argument.
*
* @param format The format of the string.
* @param ... The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int scanf(const char* restrict, ...)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1), __format__(__slibc_scanf__, 1, 2))));
/**
* Parse data from from a text stream.
*
* TODO list format rules for fscanf
*
* @param stream The input stream.
* @param format The format of the string.
* @param ... The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int fscanf(FILE* restrict, const char* restrict, ...)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2), __format__(__slibc_scanf__, 2, 3))));
/**
* This function is identical to `fscanf`,
* except it reads from a string rather than
* a file.
*
* @param input The formatted string.
* @param format The format of the string.
* @param ... The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int sscanf(const char* restrict, const char* restrict, ...)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2), __format__(__slibc_scanf__, 2, 3))));
#if defined(__SLIBC_SOURCE)
/**
* This function is identical to `fscanf`,
* except it does not lock the stream.
*
* This is a slibc extension.
*
* @param stream The input stream.
* @param format The format of the string.
* @param ... The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int fscanf_unlocked(FILE* restrict, const char* restrict, ...)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2), __format__(__slibc_scanf__, 2, 3))));
/**
* This function is identical to `scanf`,
* except it will stop parsing the string
* after a selected number of bytes, or
* at the end of the string.
*
* This is a slibc extension.
*
* @param input The formatted string.
* @param length The maximum number of bytes to read.
* @param format The format of the string.
* @param ... The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int snscanf(const char* restrict, size_t, const char* restrict, ...)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(3), __format__(__slibc_scanf__, 3, 4))));
/**
* This function is identical to `fscanf`,
* except it is limited to file descriptor-backed
* streams, and uses the file descriptor as the
* first argument rather than the stream.
*
* This is a slibc extension.
*
* @param fd The file descriptor.
* @param format The format of the string.
* @param ... The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int dscanf(int, const char* restrict, ...)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(2), __format__(__slibc_scanf__, 2, 3))));
#endif
/**
* This function is identical to `scanf`,
* except it uses `va_list` instead of variadic arguments.
*
* @param format The format of the string.
* @param args The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int vscanf(const char* restrict, va_list)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1))));
/**
* This function is identical to `fscanf`,
* except it uses `va_list` instead of variadic arguments.
*
* @param stream The input stream.
* @param format The format of the string.
* @param args The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int vfscanf(FILE* restrict, const char* restrict, va_list)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2))));
/**
* This function is identical to `sscanf`,
* except it uses `va_list` instead of variadic arguments.
*
* @param input The formatted string.
* @param format The format of the string.
* @param args The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int vsscanf(const char* restrict, const char* restrict, va_list)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2))));
#if defined(__SLIBC_SOURCE)
/**
* This function is identical to `fscanf_unlocked`,
* except it uses `va_list` instead of variadic arguments.
*
* This is a slibc extension.
*
* @param stream The input stream.
* @param format The format of the string.
* @param args The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int vfscanf_unlocked(FILE* restrict, const char* restrict, va_list)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2))));
/**
* This function is identical to `snscanf`,
* except it uses `va_list` instead of variadic arguments.
*
* This is a slibc extension.
*
* @param input The formatted string.
* @param length The maximum number of bytes to read.
* @param format The format of the string.
* @param args The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int vsnscanf(const char* restrict, size_t, const char* restrict, va_list)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(3))));
/**
* This function is identical to `sscanf`,
* except it uses `va_list` instead of variadic arguments.
*
* This is a slibc extension.
*
* @param fd The file descriptor.
* @param format The format of the string.
* @param args The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int vdscanf(int, const char* restrict, va_list)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(2))));
#endif
/**
* This function is identical to `scanf`,
* except it uses `wchar_t` instead of `char`.
*
* @param format The format of the string.
* @param ... The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int wscanf(const wchar_t* restrict, ...)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1))));
/**
* This function is identical to `fscanf`,
* except it uses `wchar_t` instead of `char`.
*
* @param stream The input stream.
* @param format The format of the string.
* @param ... The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int fwscanf(FILE* restrict, const wchar_t* restrict, ...)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2))));
/**
* This function is identical to `sscanf`,
* except it uses `wchar_t` instead of `char`.
*
* @param input The formatted string.
* @param format The format of the string.
* @param ... The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int swscanf(const wchar_t* restrict, const wchar_t* restrict, ...)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2))));
#if defined(__SLIBC_SOURCE)
/**
* This function is identical to `fscanf_unlocked`,
* except it uses `wchar_t` instead of `char`.
*
* This is a slibc extension added for completeness.
*
* @param stream The input stream.
* @param format The format of the string.
* @param ... The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int fwscanf_unlocked(FILE* restrict, const wchar_t* restrict, ...)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2))));
/**
* This function is identical to `snscanf`,
* except it uses `wchar_t` instead of `char`.
*
* This is a slibc extension added for completeness.
*
* @param input The formatted string.
* @param length The maximum number of characters to read.
* @param format The format of the string.
* @param ... The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int snwscanf(const wchar_t* restrict, size_t, const wchar_t* restrict, ...)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(3))));
/**
* This function is identical to `dscanf`,
* except it uses `wchar_t` instead of `char`.
*
* This is a slibc extension added for completeness.
*
* @param fd The file descriptor.
* @param format The format of the string.
* @param ... The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int dwscanf(int, const wchar_t* restrict, ...)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(2))));
#endif
/**
* This function is identical to `wscanf`,
* except it uses `va_list` instead of variadic arguments.
*
* @param format The format of the string.
* @param args The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int vwscanf(const wchar_t* restrict, va_list)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1))));
/**
* This function is identical to `fwscanf`,
* except it uses `va_list` instead of variadic arguments.
*
* @param stream The input stream.
* @param format The format of the string.
* @param args The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int vfwscanf(FILE* restrict, const wchar_t* restrict, va_list)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2))));
/**
* This function is identical to `swscanf`,
* except it uses `va_list` instead of variadic arguments.
*
* @param input The formatted string.
* @param format The format of the string.
* @param args The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int vswscanf(const wchar_t* restrict, const wchar_t* restrict, va_list)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2))));
#if defined(__SLIBC_SOURCE)
/**
* This function is identical to `fwscanf_unlocked`,
* except it uses `va_list` instead of variadic arguments.
*
* This is a slibc extension added for completeness.
*
* @param stream The input stream.
* @param format The format of the string.
* @param args The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int vfwscanf_unlocked(FILE* restrict, const wchar_t* restrict, va_list)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2))));
/**
* This function is identical to `snwscanf`,
* except it uses `va_list` instead of variadic arguments.
*
* This is a slibc extension added for completeness.
*
* @param input The formatted string.
* @param length The maximum number of characters to read.
* @param format The format of the string.
* @param args The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int vsnwscanf(const wchar_t* restrict, size_t, const wchar_t* restrict, va_list)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(3))));
/**
* This function is identical to `swscanf`,
* except it uses `va_list` instead of variadic arguments.
*
* This is a slibc extension added for completeness.
*
* @param fd The file descriptor.
* @param format The format of the string.
* @param args The output parameter for the encoded values.
* @return The number successfully converted argument
* (may be less than specified.) `EOF` is returned
* if the end of the input is reached before the
* first argument is successfully converted, or
* on error.
*
* @since Always.
*/
int vdwscanf(int, const wchar_t* restrict, va_list)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(2))));
#endif
#if !defined(__PORTABLE)
/**
* This function is identical to `scanf`.
*
* @since Always.
*/
int __isoc99_scanf(const char* restrict, ...)
__deprecated("Use 'scanf' instead.")
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1), __format__(__slibc_scanf__, 1, 2))));
/**
* This function is identical to `fscanf`.
*
* @since Always.
*/
int __isoc99_fscanf(FILE* restrict, const char* restrict, ...)
__deprecated("Use 'fscanf' instead.")
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2), __format__(__slibc_scanf__, 2, 3))));
/**
* This function is identical to `sscanf`.
*
* @since Always.
*/
int __isoc99_sscanf(const char* restrict, const char* restrict, ...)
__deprecated("Use 'sscanf' instead.")
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2), __format__(__slibc_scanf__, 2, 3))));
/**
* This function is identical to `vscanf`.
*
* @since Always.
*/
int __isoc99_vscanf(const char* restrict, va_list)
__deprecated("Use 'vscanf' instead.")
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1))));
/**
* This function is identical to `vfscanf`.
*
* @since Always.
*/
int __isoc99_vfscanf(FILE* restrict, const char* restrict, va_list)
__deprecated("Use 'vfscanf' instead.")
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2))));
/**
* This function is identical to `vsscanf`.
*
* @since Always.
*/
int __isoc99_vsscanf(const char* restrict, const char* restrict, va_list)
__deprecated("Use 'vsscanf' instead.")
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2))));
/**
* This function is identical to `wscanf`.
*
* @since Always.
*/
int __isoc99_wscanf(const wchar_t* restrict, ...)
__deprecated("Use 'wscanf' instead.")
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1))));
/**
* This function is identical to `fwscanf`.
*
* @since Always.
*/
int __isoc99_fwscanf(FILE* restrict, const wchar_t* restrict, ...)
__deprecated("Use 'fwscanf' instead.")
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2))));
/**
* This function is identical to `swscanf`.
*
* @since Always.
*/
int __isoc99_swscanf(const wchar_t* restrict, const wchar_t* restrict, ...)
__deprecated("Use 'swscanf' instead.")
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2))));
/**
* This function is identical to `vwscanf`.
*
* @since Always.
*/
int __isoc99_vwscanf(const wchar_t* restrict, va_list)
__deprecated("Use 'vwscanf' instead.")
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1))));
/**
* This function is identical to `vfwscanf`.
*
* @since Always.
*/
int __isoc99_vfwscanf(FILE* restrict, const wchar_t* restrict, va_list)
__deprecated("Use 'vfwscanf' instead.")
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2))));
/**
* This function is identical to `vswscanf`.
*
* @since Always.
*/
int __isoc99_vswscanf(const wchar_t* restrict, const wchar_t* restrict, va_list)
__deprecated("Use 'vswscanf' instead.")
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__(1, 2))));
#endif
#endif
/* TODO wprintf and wscanf belongs in <wchar.h> */
