File: unistdio.in.h

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/* Elementary Unicode string functions.
   Copyright (C) 2002, 2005-2007, 2009-2018 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or
   modify it under the terms of either:

     * the GNU Lesser General Public License as published by the Free
       Software Foundation; either version 3 of the License, or (at your
       option) any later version.

   or

     * the GNU General Public License as published by the Free
       Software Foundation; either version 2 of the License, or (at your
       option) any later version.

   or both in parallel, as here.
   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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

#ifndef _UNISTDIO_H
#define _UNISTDIO_H

#include "unitypes.h"

/* Get size_t.  */
#include <stddef.h>

/* Get FILE.  */
#include <stdio.h>

/* Get va_list.  */
#include <stdarg.h>

#ifdef __cplusplus
extern "C" {
#endif

/* These work like the printf function family.
   In the format string:
   The format directive 'U' takes an UTF-8 string (const uint8_t *).
   The format directive 'lU' takes an UTF-16 string (const uint16_t *).
   The format directive 'llU' takes an UTF-32 string (const uint32_t *).

   The prefix (ulc_, u8_, u16_, u16_) indicates the type of the resulting
   string.  The prefix 'ulc' stands for "locale encoded".

   An infix 'v' indicates that a va_list is passed instead of multiple
   arguments.

   The functions *sprintf have a 'buf' argument that is assumed to be large
   enough.  (DANGEROUS!  Overflowing the buffer will crash the program.)
   The functions *snprintf have a 'buf' argument that is assumed to be 'size'
   units large.  (DANGEROUS!  The resulting string might be truncated in the
   middle of a multibyte character.)
   The functions *asprintf have a 'resultp' argument.  The result will be
   freshly allocated and stored in *resultp.
   The functions *asnprintf have a (resultbuf, lengthp) argument pair.  If
   resultbuf is not NULL and the result fits into *lengthp units, it is put
   in resultbuf, and resultbuf is returned.  Otherwise, a freshly allocated
   string is returned.  In both cases, *lengthp is set to the length (number
   of units) of the returned string.  In case of error, NULL is returned and
   errno is set.
 */

/* ASCII format string, result in locale dependent encoded 'char *'.  */
extern int
       ulc_sprintf (char *buf,
                    const char *format, ...);
extern int
       ulc_snprintf (char *buf, size_t size,
                     const char *format, ...);
extern int
       ulc_asprintf (char **resultp,
                     const char *format, ...);
extern char *
       ulc_asnprintf (char *resultbuf, size_t *lengthp,
                      const char *format, ...);
extern int
       ulc_vsprintf (char *buf,
                     const char *format, va_list ap);
extern int
       ulc_vsnprintf (char *buf, size_t size,
                      const char *format, va_list ap);
extern int
       ulc_vasprintf (char **resultp,
                      const char *format, va_list ap);
extern char *
       ulc_vasnprintf (char *resultbuf, size_t *lengthp,
                       const char *format, va_list ap);

/* ASCII format string, result in UTF-8 format.  */
extern int
       u8_sprintf (uint8_t *buf,
                   const char *format, ...);
extern int
       u8_snprintf (uint8_t *buf, size_t size,
                    const char *format, ...);
extern int
       u8_asprintf (uint8_t **resultp,
                    const char *format, ...);
extern uint8_t *
       u8_asnprintf (uint8_t *resultbuf, size_t *lengthp,
                     const char *format, ...);
extern int
       u8_vsprintf (uint8_t *buf,
                    const char *format, va_list ap);
extern int
       u8_vsnprintf (uint8_t *buf, size_t size,
                     const char *format, va_list ap);
extern int
       u8_vasprintf (uint8_t **resultp,
                     const char *format, va_list ap);
extern uint8_t *
       u8_vasnprintf (uint8_t *resultbuf, size_t *lengthp,
                      const char *format, va_list ap);

/* UTF-8 format string, result in UTF-8 format.  */
extern int
       u8_u8_sprintf (uint8_t *buf,
                      const uint8_t *format, ...);
extern int
       u8_u8_snprintf (uint8_t *buf, size_t size,
                       const uint8_t *format, ...);
extern int
       u8_u8_asprintf (uint8_t **resultp,
                       const uint8_t *format, ...);
extern uint8_t *
       u8_u8_asnprintf (uint8_t *resultbuf, size_t *lengthp,
                        const uint8_t *format, ...);
extern int
       u8_u8_vsprintf (uint8_t *buf,
                       const uint8_t *format, va_list ap);
extern int
       u8_u8_vsnprintf (uint8_t *buf, size_t size,
                        const uint8_t *format, va_list ap);
extern int
       u8_u8_vasprintf (uint8_t **resultp,
                        const uint8_t *format, va_list ap);
extern uint8_t *
       u8_u8_vasnprintf (uint8_t *resultbuf, size_t *lengthp,
                         const uint8_t *format, va_list ap);

/* ASCII format string, result in UTF-16 format.  */
extern int
       u16_sprintf (uint16_t *buf,
                    const char *format, ...);
extern int
       u16_snprintf (uint16_t *buf, size_t size,
                     const char *format, ...);
extern int
       u16_asprintf (uint16_t **resultp,
                     const char *format, ...);
extern uint16_t *
       u16_asnprintf (uint16_t *resultbuf, size_t *lengthp,
                      const char *format, ...);
extern int
       u16_vsprintf (uint16_t *buf,
                     const char *format, va_list ap);
extern int
       u16_vsnprintf (uint16_t *buf, size_t size,
                      const char *format, va_list ap);
extern int
       u16_vasprintf (uint16_t **resultp,
                      const char *format, va_list ap);
extern uint16_t *
       u16_vasnprintf (uint16_t *resultbuf, size_t *lengthp,
                       const char *format, va_list ap);

/* UTF-16 format string, result in UTF-16 format.  */
extern int
       u16_u16_sprintf (uint16_t *buf,
                        const uint16_t *format, ...);
extern int
       u16_u16_snprintf (uint16_t *buf, size_t size,
                         const uint16_t *format, ...);
extern int
       u16_u16_asprintf (uint16_t **resultp,
                         const uint16_t *format, ...);
extern uint16_t *
       u16_u16_asnprintf (uint16_t *resultbuf, size_t *lengthp,
                          const uint16_t *format, ...);
extern int
       u16_u16_vsprintf (uint16_t *buf,
                         const uint16_t *format, va_list ap);
extern int
       u16_u16_vsnprintf (uint16_t *buf, size_t size,
                          const uint16_t *format, va_list ap);
extern int
       u16_u16_vasprintf (uint16_t **resultp,
                          const uint16_t *format, va_list ap);
extern uint16_t *
       u16_u16_vasnprintf (uint16_t *resultbuf, size_t *lengthp,
                           const uint16_t *format, va_list ap);

/* ASCII format string, result in UTF-32 format.  */
extern int
       u32_sprintf (uint32_t *buf,
                    const char *format, ...);
extern int
       u32_snprintf (uint32_t *buf, size_t size,
                     const char *format, ...);
extern int
       u32_asprintf (uint32_t **resultp,
                     const char *format, ...);
extern uint32_t *
       u32_asnprintf (uint32_t *resultbuf, size_t *lengthp,
                      const char *format, ...);
extern int
       u32_vsprintf (uint32_t *buf,
                     const char *format, va_list ap);
extern int
       u32_vsnprintf (uint32_t *buf, size_t size,
                      const char *format, va_list ap);
extern int
       u32_vasprintf (uint32_t **resultp,
                      const char *format, va_list ap);
extern uint32_t *
       u32_vasnprintf (uint32_t *resultbuf, size_t *lengthp,
                       const char *format, va_list ap);

/* UTF-32 format string, result in UTF-32 format.  */
extern int
       u32_u32_sprintf (uint32_t *buf,
                        const uint32_t *format, ...);
extern int
       u32_u32_snprintf (uint32_t *buf, size_t size,
                         const uint32_t *format, ...);
extern int
       u32_u32_asprintf (uint32_t **resultp,
                         const uint32_t *format, ...);
extern uint32_t *
       u32_u32_asnprintf (uint32_t *resultbuf, size_t *lengthp,
                          const uint32_t *format, ...);
extern int
       u32_u32_vsprintf (uint32_t *buf,
                         const uint32_t *format, va_list ap);
extern int
       u32_u32_vsnprintf (uint32_t *buf, size_t size,
                          const uint32_t *format, va_list ap);
extern int
       u32_u32_vasprintf (uint32_t **resultp,
                          const uint32_t *format, va_list ap);
extern uint32_t *
       u32_u32_vasnprintf (uint32_t *resultbuf, size_t *lengthp,
                           const uint32_t *format, va_list ap);

/* ASCII format string, output to FILE in locale dependent encoding.  */
extern int
       ulc_fprintf (FILE *stream,
                    const char *format, ...);
extern int
       ulc_vfprintf (FILE *stream,
                     const char *format, va_list ap);

#ifdef __cplusplus
}
#endif

#endif /* _UNISTDIO_H */