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- #pragma force_top_level
- #pragma include_only_once
-
- /* stdio.h: ANSI 'C' (X3J11 Oct 88) library header, section 4.9 */
- /* Copyright (C) Codemist Ltd. */
- /* Copyright (C) Acorn Computers Ltd., 1990, 1992 */
- /* version 2.00 */
-
- /* AM July-88 changes to all prototypes so that */
- /* #define mode 3; #include <stdio.h> can work as ANSI require. */
-
- /*
- * stdio.h declares two types, several macros, and many functions for
- * performing input and output. For a discussion on Streams and Files
- * refer to sections 4.9.2 and 4.9.3 in the above ANSI draft, or to a
- * modern textbook on C.
- */
-
- #ifndef __stdio_h
- #define __stdio_h
-
- #define __LIB_VERSION 310 /* 3.10, but int for PP inequality test */
-
- #ifndef __size_t
- #define __size_t 1
- typedef unsigned int size_t; /* from <stddef.h> */
- #endif
-
- /* ANSI forbids va_list to be defined here */
- typedef char *__va_list[1]; /* keep in step with <stdarg.h> */
-
- #ifndef NULL
- # define NULL 0 /* see <stddef.h> */
- #endif
-
- typedef struct __fpos_t_struct
- { unsigned long __lo; /* add hi one day */
- } fpos_t;
- /*
- * fpos_t is an object capable of recording all information needed to
- * specify uniquely every position within a file.
- */
-
- typedef struct __FILE_struct
- { unsigned char *__ptr;
- int __icnt; /* two separate _cnt fields so we can police ... */
- int __ocnt; /* ... restrictions that read/write are fseek separated */
- int __flag;
- /* AM: the following things do NOT need __ prefixes as they are */
- /* are invisible in an ANSI-conforming program. */
- unsigned char *__base; /* buffer base */
- int __file; /* RISCOS/Arthur/Brazil file handle */
- long __pos; /* position in file */
- int __bufsiz; /* maximum buffer size */
- int __signature; /* used with temporary files */
- struct __extradata *__extrap; /* pointer to information about stream */
- } FILE;
- /*
- * FILE is an object capable of recording all information needed to control
- * a stream, such as its file position indicator, a pointer to its
- * associated buffer, an error indicator that records whether a read/write
- * error has occurred and an end-of-file indicator that records whether the
- * end-of-file has been reached.
- * N.B. the objects contained in the #ifdef __system_io clause are for
- * system use only.
- */
-
- # define _IOREAD 0x01 /* system use - open for input */
- # define _IOWRITE 0x02 /* system use - open for output */
- # define _IOBIN 0x04 /* system use - binary stream */
- # define _IOSTRG 0x08 /* system use - string stream */
- # define _IOSEEK 0x10 /* system use - physical seek required before IO */
- # define _IOLAZY 0x20 /* system use - possible seek pending */
- # define _IOSBF 0x800 /* system use - system allocated buffer */
- # define _IOAPPEND 0x08000 /* system use - must seek to eof before write */
- #define _IOEOF 0x40 /* end-of-file reached */
- #define _IOERR 0x80 /* error occurred on stream */
- #define _IOFBF 0x100 /* fully buffered IO */
- #define _IOLBF 0x200 /* line buffered IO */
- #define _IONBF 0x400 /* unbuffered IO */
-
- #define BUFSIZ (4096) /* system buffer size (as used by setbuf) */
- #define EOF (-1)
- /*
- * negative integral constant, indicates end-of-file, that is, no more input
- * from a stream.
- */
- /* It is not clear to me what value FOPEN_MAX should have, so I will
- err in the cautious direction - ANSI requires it to be at least 8 */
- #define FOPEN_MAX 8 /* check re arthur/unix/mvs */
- /*
- * an integral constant expression that is the minimum number of files that
- * this implementation guarantees can be open simultaneously.
- */
- /* _SYS_OPEN defines a limit on the number of open files that is imposed
- by this C library */
- #define _SYS_OPEN 16
- #define FILENAME_MAX 80
- /*
- * an integral constant expression that is the size of an array of char
- * large enough to hold the longest filename string
- */
- #define L_tmpnam FILENAME_MAX
- /*
- * an integral constant expression that is the size of an array of char
- * large enough to hold a temporary file name string generated by the
- * tmpnam function.
- */
-
- #ifndef SEEK_SET
- #define SEEK_SET 0 /* start of stream (see fseek) */
- #define SEEK_CUR 1 /* current position in stream (see fseek) */
- #define SEEK_END 2 /* end of stream (see fseek) */
- #endif
-
- #define TMP_MAX 1000000000
- /*
- * an integral constant expression that is the minimum number of unique
- * file names that shall be generated by the tmpnam function.
- */
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- #ifdef _DLL
- extern FILE *_dll_iob(void);
- #define __iob (_dll_iob())
- #else
- extern FILE __iob[];
- /* an array of file objects for use by the system. */
- #endif
-
- #ifdef SYSTEM_STATICS
- extern FILE *stdin;
- extern FILE *stdout;
- extern FILE *stderr;
- #else
- #define stdin (&__iob[0])
- /* pointer to a FILE object associated with standard input stream */
- #define stdout (&__iob[1])
- /* pointer to a FILE object associated with standard output stream */
- #define stderr (&__iob[2])
- /* pointer to a FILE object associated with standard error stream */
- #endif
-
- extern int remove(const char * /*filename*/);
- /*
- * causes the file whose name is the string pointed to by filename to be
- * removed. Subsequent attempts to open the file will fail, unless it is
- * created anew. If the file is open, the behaviour of the remove function
- * is implementation-defined (under RISCOS/Arthur/Brazil the operation
- * fails).
- * Returns: zero if the operation succeeds, nonzero if it fails.
- */
- extern int rename(const char * /*old*/, const char * /*new*/);
- /*
- * causes the file whose name is the string pointed to by old to be
- * henceforth known by the name given by the string pointed to by new. The
- * file named old is effectively removed. If a file named by the string
- * pointed to by new exists prior to the call of the rename function, the
- * behaviour is implementation-defined (under RISCOS/Arthur/Brazil, the
- * operation fails).
- * Returns: zero if the operation succeeds, nonzero if it fails, in which
- * case if the file existed previously it is still known by its
- * original name.
- */
- extern FILE *tmpfile(void);
- /*
- * creates a temporary binary file that will be automatically removed when
- * it is closed or at program termination. The file is opened for update.
- * Returns: a pointer to the stream of the file that it created. If the file
- * cannot be created, a null pointer is returned.
- */
- extern char *tmpnam(char * /*s*/);
- /*
- * generates a string that is not the same as the name of an existing file.
- * The tmpnam function generates a different string each time it is called,
- * up to TMP_MAX times. If it is called more than TMP_MAX times, the
- * behaviour is implementation-defined (under RISCOS/Arthur/Brazil the
- * algorithm for the name generation works just as well after tmpnam has
- * been called more than TMP_MAX times as before; a name clash is impossible
- * in any single half year period).
- * Returns: If the argument is a null pointer, the tmpnam function leaves
- * its result in an internal static object and returns a pointer to
- * that object. Subsequent calls to the tmpnam function may modify
- * the same object. if the argument is not a null pointer, it is
- * assumed to point to an array of at least L_tmpnam characters;
- * the tmpnam function writes its result in that array and returns
- * the argument as its value.
- */
-
- extern int fclose(FILE * /*stream*/);
- /*
- * causes the stream pointed to by stream to be flushed and the associated
- * file to be closed. Any unwritten buffered data for the stream are
- * delivered to the host environment to be written to the file; any unread
- * buffered data are discarded. The stream is disassociated from the file.
- * If the associated buffer was automatically allocated, it is deallocated.
- * Returns: zero if the stream was succesfully closed, or nonzero if any
- * errors were detected or if the stream was already closed.
- */
- extern int fflush(FILE * /*stream*/);
- /*
- * If the stream points to an output or update stream in which the most
- * recent operation was output, the fflush function causes any unwritten
- * data for that stream to be delivered to the host environment to be
- * written to the file. If the stream points to an input or update stream,
- * the fflush function undoes the effect of any preceding ungetc operation
- * on the stream.
- * Returns: nonzero if a write error occurs.
- */
- extern FILE *fopen(const char * /*filename*/, const char * /*mode*/);
- /*
- * opens the file whose name is the string pointed to by filename, and
- * associates a stream with it.
- * The argument mode points to a string beginning with one of the following
- * sequences:
- * "r" open text file for reading
- * "w" create text file for writing, or truncate to zero length
- * "a" append; open text file or create for writing at eof
- * "rb" open binary file for reading
- * "wb" create binary file for writing, or truncate to zero length
- * "ab" append; open binary file or create for writing at eof
- * "r+" open text file for update (reading and writing)
- * "w+" create text file for update, or truncate to zero length
- * "a+" append; open text file or create for update, writing at eof
- * "r+b"/"rb+" open binary file for update (reading and writing)
- * "w+b"/"wb+" create binary file for update, or truncate to zero length
- * "a+b"/"ab+" append; open binary file or create for update, writing at eof
- *
- * Opening a file with read mode ('r' as the first character in the mode
- * argument) fails if the file does not exist or cannot be read.
- * Opening a file with append mode ('a' as the first character in the mode
- * argument) causes all subsequent writes to be forced to the current end of
- * file, regardless of intervening calls to the fseek function. In some
- * implementations, opening a binary file with append mode ('b' as the
- * second or third character in the mode argument) may initially position
- * the file position indicator beyond the last data written, because of the
- * NUL padding (but not under RISCOS/Arthur/Brazil).
- * When a file is opened with update mode ('+' as the second or third
- * character in the mode argument), both input and output may be performed
- * on the associated stream. However, output may not be directly followed by
- * input without an intervening call to the fflush fuction or to a file
- * positioning function (fseek, fsetpos, or rewind), and input be not be
- * directly followed by output without an intervening call to the fflush
- * fuction or to a file positioning function, unless the input operation
- * encounters end-of-file. Opening a file with update mode may open or
- * create a binary stream in some implementations (but not under RISCOS/
- * Arthur/Brazil). When opened, a stream is fully buffered if and only if
- * it does not refer to an interactive device. The error and end-of-file
- * indicators for the stream are cleared.
- * Returns: a pointer to the object controlling the stream. If the open
- * operation fails, fopen returns a null pointer.
- */
- extern FILE *freopen(const char * /*filename*/, const char * /*mode*/,
- FILE * /*stream*/);
- /*
- * opens the file whose name is the string pointed to by filename and
- * associates the stream pointed to by stream with it. The mode argument is
- * used just as in the fopen function.
- * The freopen function first attempts to close any file that is associated
- * with the specified stream. Failure to close the file successfully is
- * ignored. The error and end-of-file indicators for the stream are cleared.
- * Returns: a null pointer if the operation fails. Otherwise, freopen
- * returns the value of the stream.
- */
- extern void setbuf(FILE * /*stream*/, char * /*buf*/);
- /*
- * Except that it returns no value, the setbuf function is equivalent to the
- * setvbuf function invoked with the values _IOFBF for mode and BUFSIZ for
- * size, or (if buf is a null pointer), with the value _IONBF for mode.
- * Returns: no value.
- */
- extern int setvbuf(FILE * /*stream*/, char * /*buf*/,
- int /*mode*/, size_t /*size*/);
- /*
- * may be used after the stream pointed to by stream has been associated
- * with an open file but before it is read or written. The argument mode
- * determines how stream will be buffered, as follows: _IOFBF causes
- * input/output to be fully buffered; _IOLBF causes output to be line
- * buffered (the buffer will be flushed when a new-line character is
- * written, when the buffer is full, or when input is requested); _IONBF
- * causes input/output to be completely unbuffered. If buf is not the null
- * pointer, the array it points to may be used instead of an automatically
- * allocated buffer (the buffer must have a lifetime at least as great as
- * the open stream, so the stream should be closed before a buffer that has
- * automatic storage duration is deallocated upon block exit). The argument
- * size specifies the size of the array. The contents of the array at any
- * time are indeterminate.
- * Returns: zero on success, or nonzero if an invalid value is given for
- * mode or size, or if the request cannot be honoured.
- */
-
- #pragma -v1 /* hint to the compiler to check f/s/printf format */
- extern int fprintf(FILE * /*stream*/, const char * /*format*/, ...);
- /*
- * writes output to the stream pointed to by stream, under control of the
- * string pointed to by format that specifies how subsequent arguments are
- * converted for output. If there are insufficient arguments for the format,
- * the behaviour is undefined. If the format is exhausted while arguments
- * remain, the excess arguments are evaluated but otherwise ignored. The
- * fprintf function returns when the end of the format string is reached.
- * The format shall be a multibyte character sequence, beginning and ending
- * in its initial shift state. The format is composed of zero or more
- * directives: ordinary multibyte characters (not %), which are copied
- * unchanged to the output stream; and conversion specifiers, each of which
- * results in fetching zero or more subsequent arguments. Each conversion
- * specification is introduced by the character %. For a description of the
- * available conversion specifiers refer to section 4.9.6.1 in the ANSI
- * draft mentioned at the start of this file or to any modern textbook on C.
- * The minimum value for the maximum number of characters producable by any
- * single conversion is at least 509.
- * Returns: the number of characters transmitted, or a negative value if an
- * output error occurred.
- */
- extern int printf(const char * /*format*/, ...);
- /*
- * is equivalent to fprintf with the argument stdout interposed before the
- * arguments to printf.
- * Returns: the number of characters transmitted, or a negative value if an
- * output error occurred.
- */
- extern int sprintf(char * /*s*/, const char * /*format*/, ...);
- /*
- * is equivalent to fprintf, except that the argument s specifies an array
- * into which the generated output is to be written, rather than to a
- * stream. A null character is written at the end of the characters written;
- * it is not counted as part of the returned sum.
- * Returns: the number of characters written to the array, not counting the
- * terminating null character.
- */
- #pragma -v2 /* hint to the compiler to check f/s/scanf format */
- extern int fscanf(FILE * /*stream*/, const char * /*format*/, ...);
- /*
- * reads input from the stream pointed to by stream, under control of the
- * string pointed to by format that specifies the admissible input sequences
- * and how thay are to be converted for assignment, using subsequent
- * arguments as pointers to the objects to receive the converted input. If
- * there are insufficient arguments for the format, the behaviour is
- * undefined. If the format is exhausted while arguments remain, the excess
- * arguments are evaluated but otherwise ignored.
- * The format is composed of zero or more directives: one or more
- * white-space characters; an ordinary character (not %); or a conversion
- * specification. Each conversion specification is introduced by the
- * character %. For a description of the available conversion specifiers
- * refer to section 4.9.6.2 in the ANSI draft mentioned at the start of this
- * file, or to any modern textbook on C.
- * If end-of-file is encountered during input, conversion is terminated. If
- * end-of-file occurs before any characters matching the current directive
- * have been read (other than leading white space, where permitted),
- * execution of the current directive terminates with an input failure;
- * otherwise, unless execution of the current directive is terminated with a
- * matching failure, execution of the following directive (if any) is
- * terminated with an input failure.
- * If conversions terminates on a conflicting input character, the offending
- * input character is left unread in the input strem. Trailing white space
- * (including new-line characters) is left unread unless matched by a
- * directive. The success of literal matches and suppressed asignments is
- * not directly determinable other than via the %n directive.
- * Returns: the value of the macro EOF if an input failure occurs before any
- * conversion. Otherwise, the fscanf function returns the number of
- * input items assigned, which can be fewer than provided for, or
- * even zero, in the event of an early conflict between an input
- * character and the format.
- */
- extern int scanf(const char * /*format*/, ...);
- /*
- * is equivalent to fscanf with the argument stdin interposed before the
- * arguments to scanf.
- * Returns: the value of the macro EOF if an input failure occurs before any
- * conversion. Otherwise, the scanf function returns the number of
- * input items assigned, which can be fewer than provided for, or
- * even zero, in the event of an early matching failure.
- */
- extern int sscanf(const char * /*s*/, const char * /*format*/, ...);
- /*
- * is equivalent to fscanf except that the argument s specifies a string
- * from which the input is to be obtained, rather than from a stream.
- * Reaching the end of the string is equivalent to encountering end-of-file
- * for the fscanf function.
- * Returns: the value of the macro EOF if an input failure occurs before any
- * conversion. Otherwise, the scanf function returns the number of
- * input items assigned, which can be fewer than provided for, or
- * even zero, in the event of an early matching failure.
- */
- #pragma -v0 /* back to default */
- extern int vprintf(const char * /*format*/, __va_list /*arg*/);
- /*
- * is equivalent to printf, with the variable argument list replaced by arg,
- * which has been initialised by the va_start macro (and possibly subsequent
- * va_arg calls). The vprintf function does not invoke the va_end function.
- * Returns: the number of characters transmitted, or a negative value if an
- * output error occurred.
- */
- extern int vfprintf(FILE * /*stream*/,
- const char * /*format*/, __va_list /*arg*/);
- /*
- * is equivalent to fprintf, with the variable argument list replaced by
- * arg, which has been initialised by the va_start macro (and possibly
- * subsequent va_arg calls). The vfprintf function does not invoke the
- * va_end function.
- * Returns: the number of characters transmitted, or a negative value if an
- * output error occurred.
- */
- extern int vsprintf(char * /*s*/, const char * /*format*/, __va_list /*arg*/);
- /*
- * is equivalent to sprintf, with the variable argument list replaced by
- * arg, which has been initialised by the va_start macro (and possibly
- * subsequent va_arg calls). The vsprintf function does not invoke the
- * va_end function.
- * Returns: the number of characters written in the array, not counting the
- * terminating null character.
- */
-
- extern int fgetc(FILE * /*stream*/);
- /*
- * obtains the next character (if present) as an unsigned char converted to
- * an int, from the input stream pointed to by stream, and advances the
- * associated file position indicator (if defined).
- * Returns: the next character from the input stream pointed to by stream.
- * If the stream is at end-of-file, the end-of-file indicator is
- * set and fgetc returns EOF. If a read error occurs, the error
- * indicator is set and fgetc returns EOF.
- */
- extern char *fgets(char * /*s*/, int /*n*/, FILE * /*stream*/);
- /*
- * reads at most one less than the number of characters specified by n from
- * the stream pointed to by stream into the array pointed to by s. No
- * additional characters are read after a new-line character (which is
- * retained) or after end-of-file. A null character is written immediately
- * after the last character read into the array.
- * Returns: s if successful. If end-of-file is encountered and no characters
- * have been read into the array, the contents of the array remain
- * unchanged and a null pointer is returned. If a read error occurs
- * during the operation, the array contents are indeterminate and a
- * null pointer is returned.
- */
- extern int fputc(int /*c*/, FILE * /*stream*/);
- /*
- * writes the character specified by c (converted to an unsigned char) to
- * the output stream pointed to by stream, at the position indicated by the
- * asociated file position indicator (if defined), and advances the
- * indicator appropriately. If the file position indicator is not defined,
- * the character is appended to the output stream.
- * Returns: the character written. If a write error occurs, the error
- * indicator is set and fputc returns EOF.
- */
- extern int fputs(const char * /*s*/, FILE * /*stream*/);
- /*
- * writes the string pointed to by s to the stream pointed to by stream.
- * The terminating null character is not written.
- * Returns: EOF if a write error occurs; otherwise it returns a nonnegative
- * value.
- */
- extern int __filbuf(FILE * /*stream*/);
- /*
- * SYSTEM USE ONLY, called by getc to refill buffer and or sort out flags.
- * Returns: first character put into buffer or EOF on error.
- */
- #define getc(p) \
- (--((p)->__icnt) >= 0 ? *((p)->__ptr)++ : __filbuf(p))
- #ifndef __cplusplus
- extern int (getc)(FILE * /*stream*/);
- #endif
- /*
- * is equivalent to fgetc except that it may be (and is under
- * RISCOS/Arthur/Brazil) implemented as a macro. stream may be evaluated
- * more than once, so the argument should never be an expression with side
- * effects.
- * Returns: the next character from the input stream pointed to by stream.
- * If the stream is at end-of-file, the end-of-file indicator is
- * set and getc returns EOF. If a read error occurs, the error
- * indicator is set and getc returns EOF.
- */
- #define getchar() getc(stdin)
- #ifndef __cplusplus
- extern int (getchar)(void);
- #endif
- /*
- * is equivalent to getc with the argument stdin.
- * Returns: the next character from the input stream pointed to by stdin.
- * If the stream is at end-of-file, the end-of-file indicator is
- * set and getchar returns EOF. If a read error occurs, the error
- * indicator is set and getchar returns EOF.
- */
- extern char *gets(char * /*s*/);
- /*
- * reads characters from the input stream pointed to by stdin into the array
- * pointed to by s, until end-of-file is encountered or a new-line character
- * is read. Any new-line character is discarded, and a null character is
- * written immediately after the last character read into the array.
- * Returns: s if successful. If end-of-file is encountered and no characters
- * have been read into the array, the contents of the array remain
- * unchanged and a null pointer is returned. If a read error occurs
- * during the operation, the array contents are indeterminate and a
- * null pointer is returned.
- */
- extern int __flsbuf(int /*c*/, FILE * /*stream*/);
- /*
- * SYSTEM USE ONLY, called by putc to flush buffer and or sort out flags.
- * Returns: character put into buffer or EOF on error.
- */
- #define putc(ch, p) \
- (--((p)->__ocnt) >= 0 ? (*((p)->__ptr)++ = (ch)) : __flsbuf(ch,p))
- #ifndef __cplusplus
- extern int (putc)(int /*c*/, FILE * /*stream*/);
- #endif
- /*
- * is equivalent to fputc except that it may be (and is under
- * RISCOS/Arthur/Brazil) implemented as a macro. stream may be evaluated
- * more than once, so the argument should never be an expression with side
- * effects.
- * Returns: the character written. If a write error occurs, the error
- * indicator is set and putc returns EOF.
- */
- #define putchar(ch) putc(ch, stdout)
- #ifndef __cplusplus
- extern int (putchar)(int /*c*/);
- #endif
- /*
- * is equivalent to putc with the second argument stdout.
- * Returns: the character written. If a write error occurs, the error
- * indicator is set and putc returns EOF.
- */
- extern int puts(const char * /*s*/);
- /*
- * writes the string pointed to by s to the stream pointed to by stdout, and
- * appends a new-line character to the output. The terminating null
- * character is not written.
- * Returns: EOF if a write error occurs; otherwise it returns a nonnegative
- * value.
- */
- extern int ungetc(int /*c*/, FILE * /*stream*/);
- /*
- * pushes the character specified by c (converted to an unsigned char) back
- * onto the input stream pointed to by stream. The character will be
- * returned by the next read on that stream. An intervening call to the
- * fflush function or to a file positioning function (fseek, fsetpos,
- * rewind) discards any pushed-back characters. The external storage
- * corresponding to the stream is unchanged.
- * One character pushback is guaranteed. If the unget function is called too
- * many times on the same stream without an intervening read or file
- * positioning operation on that stream, the operation may fail.
- * If the value of c equals that of the macro EOF, the operation fails and
- * the input stream is unchanged.
- * A successful call to the ungetc function clears the end-of-file
- * indicator. The value of the file position indicator after reading or
- * discarding all pushed-back characters shall be the same as it was before
- * the characters were pushed back. For a text stream, the value of the file
- * position indicator after a successful call to the ungetc function is
- * unspecified until all pushed-back characters are read or discarded. For a
- * binary stream, the file position indicator is decremented by each
- * successful call to the ungetc function; if its value was zero before a
- * call, it is indeterminate after the call.
- * Returns: the character pushed back after conversion, or EOF if the
- * operation fails.
- */
-
- extern size_t fread(void * /*ptr*/,
- size_t /*size*/, size_t /*nmemb*/, FILE * /*stream*/);
- /*
- * reads into the array pointed to by ptr, up to nmemb members whose size is
- * specified by size, from the stream pointed to by stream. The file
- * position indicator (if defined) is advanced by the number of characters
- * successfully read. If an error occurs, the resulting value of the file
- * position indicator is indeterminate. If a partial member is read, its
- * value is indeterminate. The ferror or feof function shall be used to
- * distinguish between a read error and end-of-file.
- * Returns: the number of members successfully read, which may be less than
- * nmemb if a read error or end-of-file is encountered. If size or
- * nmemb is zero, fread returns zero and the contents of the array
- * and the state of the stream remain unchanged.
- */
- extern size_t fwrite(const void * /*ptr*/,
- size_t /*size*/, size_t /*nmemb*/, FILE * /*stream*/);
- /*
- * writes, from the array pointed to by ptr up to nmemb members whose size
- * is specified by size, to the stream pointed to by stream. The file
- * position indicator (if defined) is advanced by the number of characters
- * successfully written. If an error occurs, the resulting value of the file
- * position indicator is indeterminate.
- * Returns: the number of members successfully written, which will be less
- * than nmemb only if a write error is encountered.
- */
-
- extern int fgetpos(FILE * /*stream*/, fpos_t * /*pos*/);
- /*
- * stores the current value of the file position indicator for the stream
- * pointed to by stream in the object pointed to by pos. The value stored
- * contains unspecified information usable by the fsetpos function for
- * repositioning the stream to its position at the time of the call to the
- * fgetpos function.
- * Returns: zero, if successful. Otherwise nonzero is returned and the
- * integer expression errno is set to an implementation-defined
- * nonzero value (under RISCOS/Arthur/Brazil fgetpos cannot fail).
- */
- extern int fseek(FILE * /*stream*/, long int /*offset*/, int /*whence*/);
- /*
- * sets the file position indicator for the stream pointed to by stream.
- * For a binary stream, the new position is at the signed number of
- * characters specified by offset away from the point specified by whence.
- * The specified point is the beginning of the file for SEEK_SET, the
- * current position in the file for SEEK_CUR, or end-of-file for SEEK_END.
- * A binary stream need not meaningfully support fseek calls with a whence
- * value of SEEK_END.
- * For a text stream, either offset shall be zero, or offset shall be a
- * value returned by an earlier call to the ftell function on the same
- * stream and whence shall be SEEK_SET.
- * The fseek function clears the end-of-file indicator and undoes any
- * effects of the ungetc function on the same stream. After an fseek call,
- * the next operation on an update stream may be either input or output.
- * Returns: nonzero only for a request that cannot be satisfied.
- */
- extern int fsetpos(FILE * /*stream*/, const fpos_t * /*pos*/);
- /*
- * sets the file position indicator for the stream pointed to by stream
- * according to the value of the object pointed to by pos, which shall be a
- * value returned by an earlier call to the fgetpos function on the same
- * stream.
- * The fsetpos function clears the end-of-file indicator and undoes any
- * effects of the ungetc function on the same stream. After an fsetpos call,
- * the next operation on an update stream may be either input or output.
- * Returns: zero, if successful. Otherwise nonzero is returned and the
- * integer expression errno is set to an implementation-defined
- * nonzero value (under RISCOS/Arthur/Brazil the value that of EDOM
- * in math.h).
- */
- extern long int ftell(FILE * /*stream*/);
- /*
- * obtains the current value of the file position indicator for the stream
- * pointed to by stream. For a binary stream, the value is the number of
- * characters from the beginning of the file. For a text stream, the file
- * position indicator contains unspecified information, usable by the fseek
- * function for returning the file position indicator to its position at the
- * time of the ftell call; the difference between two such return values is
- * not necessarily a meaningful measure of the number of characters written
- * or read.
- * Returns: if successful, the current value of the file position indicator.
- * On failure, the ftell function returns -1L and sets the integer
- * expression errno to an implementation-defined nonzero value
- * (under RISCOS/Arthur/Brazil ftell cannot fail).
- */
- extern void rewind(FILE * /*stream*/);
- /*
- * sets the file position indicator for the stream pointed to by stream to
- * the beginning of the file. It is equivalent to
- * (void)fseek(stream, 0L, SEEK_SET)
- * except that the error indicator for the stream is also cleared.
- * Returns: no value.
- */
-
- extern void clearerr(FILE * /*stream*/);
- /*
- * clears the end-of-file and error indicators for the stream pointed to by
- * stream. These indicators are cleared only when the file is opened or by
- * an explicit call to the clearerr function or to the rewind function.
- * Returns: no value.
- */
-
- #define feof(stream) ((stream)->__flag & _IOEOF)
- #ifndef __cplusplus
- extern int (feof)(FILE * /*stream*/);
- #endif
- /*
- * tests the end-of-file indicator for the stream pointed to by stream.
- * Returns: nonzero iff the end-of-file indicator is set for stream.
- */
- #define ferror(stream) ((stream)->__flag & _IOERR)
- #ifndef __cplusplus
- extern int (ferror)(FILE * /*stream*/);
- #endif
- /*
- * tests the error indicator for the stream pointed to by stream.
- * Returns: nonzero iff the error indicator is set for stream.
- */
- extern void perror(const char * /*s*/);
- /*
- * maps the error number in the integer expression errno to an error
- * message. It writes a sequence of characters to the standard error stream
- * thus: first (if s is not a null pointer and the character pointed to by
- * s is not the null character), the string pointed to by s followed by a
- * colon and a space; then an appropriate error message string followed by
- * a new-line character. The contents of the error message strings are the
- * same as those returned by the strerror function with argument errno,
- * which are implementation-defined.
- * Returns: no value.
- */
- #ifdef __cplusplus
- }
- #endif
-
- #endif
-
- /* end of stdio.h */
-