X-Git-Url: https://pd.if.org/git/?p=pdclib;a=blobdiff_plain;f=includes%2Fstdio.h;h=ddf7d981ca183b58b99572a079381659fc9ddd5c;hp=62b5af18dd6a5deae86bfc2280ee482e23ff7038;hb=refs%2Ftags%2FOLD;hpb=1e221deb9ee725a14b3656f94e2763f8faeb18dc diff --git a/includes/stdio.h b/includes/stdio.h index 62b5af1..ddf7d98 100644 --- a/includes/stdio.h +++ b/includes/stdio.h @@ -1,15 +1,585 @@ -// ---------------------------------------------------------------------------- -// $Id$ -// ---------------------------------------------------------------------------- -// Public Domain C Library - http://pdclib.sourceforge.net -// This code is Public Domain. Use, modify, and redistribute at will. -// ---------------------------------------------------------------------------- -// TODO -// ---------------------------------------------------------------------------- +/* ---------------------------------------------------------------------------- + * $Id$ + * ---------------------------------------------------------------------------- + * Public Domain C Library - http://pdclib.sourceforge.net + * This code is Public Domain. Use, modify, and redistribute at will. + * ---------------------------------------------------------------------------- + * Input/output + * --------------------------------------------------------------------------*/ -#ifndef __STDIO_H -#define __STDIO_H __STDIO_H +#ifndef _STDIO_H +#define _STDIO_H _STDIO_H -// TODO +#ifndef _NULL +#include "__intern.h" +#endif /* _NULL */ -#endif // __STDIO_H +/* ---------------------------------------------------------------------------- + * MACROS + * --------------------------------------------------------------------------*/ + +#define NULL _NULL + +#define _IOFBF 0 // @see setvbuf() +#define _IOLBF 1 // @see setvbuf() +#define _IONBF 2 // @see setvbuf() + +#define SEEK_SET 0 // @see fseek() +#define SEEK_CUR 1 // @see fseek() +#define SEEK_END 2 // @see fseek() + +#define EOF -1 + +/* ---------------------------------------------------------------------------- + * TYPEDEFS + * --------------------------------------------------------------------------*/ + +#ifndef _SIZE_T +#define _SIZE_T _SIZE_T +typedef __size_t size_t +#endif /* _SIZE_T */ + +/* file position, buffer pointer, ErrorIndicator, EOFIndicator, HostRC */ +typedef FILE; /* TODO */ + +/* file position */ +typedef fpos_t; /* TODO */ + +extern FILE * stdin; +extern FILE * stdout; +extern FILE * stderr; + +/* ---------------------------------------------------------------------------- + * FUNCTIONS + * --------------------------------------------------------------------------*/ + +/* TABLE OF CONTENTS (in order of appearance) + * + * General File Handling + * * fopen() + * * freopen() + * * fflush() + * * feof() + * * ferror() + * * clearerr() + * * fclose() + * + * Rename / Remove + * * rename() + * * remove() + * + * Temporary Files + * * tmpfile() + * * tmpnam() + * + * File Positioning + * * fseek() + * * rewind() + * * ftell() + * * fgetpos() + * * fsetpos() + * + * Reading + * * fgetc() + * * getc() + * * getchar() + * * ungetc() + * * fgets() + * * gets() + * + * Writing + * * fputc() + * * putc() + * * putchar() + * * fputs() + * * puts() + * + * Formatted Reading + * * fscanf() + * * scanf() + * * sscanf() + * * vfscanf() + * * vscanf() + * * vsscanf() + * + * Formatted Writing + * * fprintf() + * * printf() + * * sprintf() + * * snprintf() + * * vfprintf() + * * vprintf() + * * vsprintf() + * * vsnprintf() + * + * Special + * * perror() + * + * Binary Read / Write + * * fread() + * * fwrite() + * + * Buffer Handling + * * setvbuf() + * * setbuf() + * + */ + +/** File OPEN. Opens a file. + * @param filename Name of the file. + * @param mode One of r, w, a, rb, wb, ab, r+, w+, a+, rb+, wb+, ab+, + * specifying which mode to open the file in. + * @return A file handle associated with the opened file, NULL if failed. + */ +FILE * fopen( const char * restrict filename, const char * restrict mode ); + +/** File REOPEN. Opens the file specified by the given name, associating it + * with the given file handle. If filename is NULL, it is attempted to change + * the mode of the already opened file associated with the given file handle. + * (This function can e.g. be used to reassociate stdin / stdout / stderr with + * a filename.) + * @param filename Name of the file to be opened. + * @param mode One of r, w, a, rb, wb, ab, r+, w+, a+, rb+, wb+, ab+, + * specifying which mode to open the file in. + * @param fh The file handle to associate with the opened file. + * @return fh if successful, NULL if failed. + */ +FILE * freopen( const char * restrict filename, const char * restrict mode, FILE * fh ); + +/** File FLUSH. Flushes any output buffers of a file. If parameter is NULL, + * flushes output buffers for all file handles. The function is undefined for + * input streams or update streams when the last operation was input. + * @param fh The file handle. + * @return 0 if successful, EOF on write error (setting error indicator). + */ +int fflush( FILE * fh ); + +/** File EOF. Tests whether EOF is set for a given file. + * @param fh The file handle. + * @return 0 if EOF is not set, non-zero if EOF is set. + */ +int feof( FILE * fh ); + +/** File ERROR. Tests whether error indicator is set for a given file. + * @param fh The file handle. + * @return 0 if error indicator is not set, non-zero if set. + */ +int ferror( FILE * fh ); + +/** CLEAR ERRor. Clears EOF and error indicator of a FILE handle. + * @param fh The file handle. + */ +void clearerr( FILE * fh ); + +/** File CLOSE. Flushes any output buffers, closes the file, frees internal + * buffers, and discards the file handle. + * @param fh The file handle. + * @return 0 if successful, non-zero if failed. (In any case, the file handle + * is invalid afterwards.) + */ +int fclose( FILE * fh ); + +/* ------------------------------------------------------------------------- */ + +/** RENAME file. Causes a file to be no longer accessible under a given name, + * but a new name instead. + * @param filename Name of the file. + * @param newname New file name. + * @return 0 if successful, non-zero if failed. (This implementation: INT_MAX + * if newname already exists; INT_MIN if filename could not be found; + * EOF if filename is a currently open file.) + */ +int rename( const char * filename, const char * newname ); + +/** REMOVE file. Causes a file to be no longer accessible under a given name. + * @param filename Name of the file. + * @return 0 if successful, non-zero if failed. (This implementation: INT_MAX + * if the file is currently open.) + */ +int remove( const char * filename ); + +/* ------------------------------------------------------------------------- */ + +/** TeMPorary FILE. Opens a previously non-existend file in "wb+" mode that + * will be automatically deleted when closed, or when the program terminates. + * (This implementation: If program terminates abnormally, file is not + * deleted.) + * @return A file handle for the temporary file. (NULL if opening failed.) + */ +FILE * tmpfile( void ) + +/** TeMPorary NAMe. Generates a file name that does not yet exist in the file + * system, and is different from the last call to the function. Note that a + * file generated with this name is not "temporary", and must be remove()d + * normally. + * @param filename NULL, or a char[ L_tmpnam ] array. (Beware, calling this + * function with a NULL parameter is not thread-safe.) + * @return If 'filename' is NULL, a pointer to an internal static buffer + * holding the generated name. If 'filename' is not null, the + * generated name is stored in 'filename', and 'filename' is returned. + * If the filename generation fails, function returns NULL. + */ +char * tmpnam( char * filename ); + +/* ------------------------------------------------------------------------- */ + +/** File SEEK. Sets the current position in a file to the values specified by + * start and offset. + * @param fh The file handle. + * @param offset The offset from 'start' to position to. + * @param start The starting point from which to calculate the offset. May be + * one of SEEK_SET, SEEK_CUR, SEEK_END. + * @return 0 if successful, non-zero if error encountered. + */ +int fseek( FILE * fh, long offset, int start ); + +/** REWIND file. Equivalent to (void) fseek( fh, 0, SEEK_SET ). + * @param fh The file handle. + */ +void rewind( FILE * fh ); + +/** File TELL position. Tells the current offset into a given file. + * @param fh The file handle. + * @return The offset into the file. + */ +long ftell( FILE * fh ); + +/** File GET POSition. Stores the current state and position in a file. + * @param fh The file handle. + * @param pos The object to store the current state in. + * @return 0 if successful, non-zero if error encountered. + */ +int fgetpos( FILE * restrict fh, fpos_t * restrict pos ); + +/** File SET POSition. Sets the current file position to the value stored in a + * given fpos_t object. + * @param fh The file handle. + * @param pos The fpos_t object. + * @return 0 if successful, non-zero if error encountered. + */ +int fsetpos( FILE * fh, const fpos_t * pos ); + +/* ------------------------------------------------------------------------- */ + +/** File GET Character. Reads a character from file. + * @param fh The file handle. + * @return The next character in the file, as unsigned char converted to int, + * or EOF if end of file is reached. + */ +int fgetc( FILE * fh ); + +/** GET Character. Equivalent to fgetc(), but may be implemented as macro, and + * is allowed to evaluate its parameter more than once. + * @param fh The file handle. + * @return The character read, or EOF if end of file / error encountered. + */ +int getc( FILE * fh ); + +/** GET CHARacter. Equivalent to getc( stdin ). + * @return The character read, or EOF if end of file / error encountered. + */ +int getchar( void ); + +/** UN-GET Character. Puts a character back into an input stream. + * @param c The character to put back. + * @param fh The file handle. + * @return The character put back, EOF if error encountered. + */ +int ungetc( int c, FILE * fh ); + +/** File GET String. Reads a line (terminated by newline character) from file, + * but reading no more than n characters. + * @param dest The char array to write into. + * @param n The maximum number of characters to read. + * @param fh The file handle. + * @return 'dest', or NULL if an error occurred. + */ +char * fgets( char * restrict dest, int n, FILE * restrict fh ); + +/** GET String. Equivalent to fgets( dest, stdin ). + * @param dest The character array to write to. + * @return 'dest', or NULL if an error occurred. + */ +char * gets( char * dest ); + +/* ------------------------------------------------------------------------- */ + +/** File PUT Character. Writes a character to file. + * @param c The character (when converted to unsigned char) to write. + * @param fh The file handle. + * @return 'c', or EOF if an error occurred. + */ +int fputc( int c, FILE * fh ); + +/** PUT Character. Equivalent to fputc( c, stdout ), but may be implemented as + * a macro, and may evaluate the file handle more than once. + * @param c The character to write. + * @param fh The file handle. + * @return The character written, or EOF if error encountered. + */ +int putc( int c, FILE * fh ); + +/** PUT CHARacter. Equivalent to putc( c, stdout ). + * @param c The character to write. + * @return The character written, or EOF if error encountered. + */ +int putchar( int c ); + +/** File PUT String. Writes a C string to file. + * @param src The string to write. + * @param fh The file handle. + * @return >= 0 if successful, or EOF if an error occurred. + */ +int fputs( const char * restrict src, FILE * restrict fh ); + +/** PUT String. Write a C string to stdout. + * @param src The C string to write. + * @return >= 0 if successful, EOF if error encountered. + */ +int puts( const char * src ); + +/* ------------------------------------------------------------------------- */ + +/** File SCAN Formatted. Reads from given file handle, under control of a + * formatting string, the values of variables pointed to by 0..n pointers. + * @param fh The file handle. + * @param format The formatting string. + * @param ... A list of 0..n pointers corresponding to placeholders in + * 'format'. + * @return EOF if failed, number of values successfully assigned otherwise. + */ +int fscanf( FILE * restrict fh, const char * restrict format, ... ); + +/** SCAN Formatted. Equivalent to fscanf( stdin, format, ... ) + * @param format The formatting string. + * @param ... A list of 0..n pointers corresponding to placeholders in + * 'format'. + * @return EOF if failed, number of values successfully assigned otherwise. + */ +int scanf( const char * restrict format, ... ); + +/** String SCAN Formatted. Equivalent to scanf( format, ... ), but using a C + * string instead of a file handle for input. + * @param src The input string. + * @param format The formatting string. + * @param ... A list of 0..n pointers corresponding to placeholders in + * 'format'. + * @return EOF if failed, number of values successfully assigned otherwise. + */ +int sscanf( const char * restrict src, const char * restrict format, ... ); + +/** Variable File SCAN Formatted. Equivalent to fscanf( fh, format, ... ), + * with the variable-length parameter list replaced by a va_list, created by + * the va_start macro. + * @param fh The file handle. + * @param format The formatting string. + * @param args The argument list created by the va_start macro. + * @return Number of characters printed. + */ +int vfscanf( FILE * restrict fh, const char * restrict format, va_list args ); + +/** Variable SCAN Formatted. Equivalent to vfscanf( stdin, format, args ). + * @param format The formatting string. + * @param args The argument list created by the va_start macro. + * @return Number of characters printed. + */ +int vscanf( const char * restrict format, va_list args ); + +/** Variable String SCAN Formatted. Equivalent to vscanf( format, args ), but + * reading from a C string instead of stdin. + * @param src The C string to read from. + * @param format The formatting string. + * @param args The argument list created by the va_start macro. + * @return Number of characters printed. + */ +int vsscanf( const char * restrict src, const char * restrict format, va_list ap ); + +/* ------------------------------------------------------------------------- */ + +/** File PRINT Formatted. Prints to given file handle, under control of a + * formatting string, the values of 0..n variables. + * @param fh The file handle. + * @param format The formatting string. + * @param ... A list of 0..n variables corresponding to placeholders in + * 'format'. + * @return Number of characters printed, negative value if error occurred. + */ +int fprintf( FILE * restrict fh, const char * restrict format, ... ); + +/** PRINT Formatted. Equivalent to fprintf( stdout, format, ... ). + * @param format The formatting string. + * @param ... A list of 0..n variables corresponding to placeholders in + * 'format'. + * @return Number of characters printed. + */ +int printf( const char * restrict format, ... ); + +/** String PRINT Formatted. Equivalent to printf( format, ... ), but writing + * to a char array instead of stdout. + * @param dest The char array to write to. + * @param format The formatting string. + * @param ... A list of 0..n variables corresponding to placeholders in + * 'format'. + * @return Number of characters printed. + */ +int sprintf( char * restrict dest, const char * restrict format, ... ); + +/** String N PRINT Formatted. Equivalent to sprintf( dest, format, ... ), but + * will not write more than n characters. + * @param dest The char array to write to. + * @param n The maximum number of characters to write. + * @param format The formatting string. + * @param ... A list of 0..n variables corresponding to placeholders in + * 'format'. + * @return Number of characters printed. + */ +int snprintf( char * restrict s, size_t n, const char * restrict format, ... ); + +/** Variable File PRINT Formatted. Equivalent to fprintf( fh, format, ... ), + * with the variable-length parameter list replaced by a va_list, created by + * the va_start macro. + * @param fh The file handle. + * @param format The formatting string. + * @param args The argument list created by the va_start macro. + * @return Number of characters printed. + */ +int vfprintf( FILE * restrict fh, const char * restrict format, va_list args ); + +/** Variable PRINT Formatted. Equivalent to vfprintf( stdout, format, args ). + * @param format The formatting string. + * @param args The argument list created by the va_start macro. + * @return Number of characters printed. + */ +int vprintf( const char * restrict format, va_list args ); + +/** Variable String PRINT Formatted. Equivalent to vprintf( format, args ), but + * writing to a char array instead to stdout. + * @param dest The char array to write to. + * @param format The formatting string. + * @param args The argument list created by the va_start macro. + * @return Number of characters printed. + */ +int vsprintf( char * restrict s, const char * restrict format, va_list ap); + +/** Variable String N PRINT Formatted. Equivalent to vsprintf( dest, format, + * args ), but will not write more than n characters. + * @param dest The char array to write to. + * @param n Maximum number of characters to write. + * @param format The formatting string. + * @param args The argument list created by the va_start macro. + * @return Number of characters printed. + */ +int vsnprintf( char * restrict dest, size_t n, const char * restrict format, va_list ap ); + +/* ------------------------------------------------------------------------- */ + +/** Print ERROR. + * Equivalent to fprintf( stderr, "%s: %s\n", text, strerror( errno ) ). + * @param test Text to prepend the error message with. + */ +void perror( const char * text ); + +/* ------------------------------------------------------------------------- */ + +/** File READ. Reads a number of objects of a given size from file, and into + * a memory area. + * @param dest The memory area to write into. + * @param size The size of one object. + * @param n The number of objects to read. + * @param fh The file handle. + * @return The number of objects successfully read. + */ +size_t fread( void * restrict dest, size_t size, size_t n, FILE * restrict fh ); + +/** File WRITE. Writes a number of objects from a memory area to file. + * @param src The memory area to write from. + * @param size The size of a single object. + * @param n The number of objects to write. + * @param fh The file handle. + * @return The number of objects successfully written. + */ +size_t fwrite( const void * restrict src, size_t size, size_t n, FILE * restrict fh ); + +/* ------------------------------------------------------------------------- */ + +/** SET Virtual BUFfer. Sets buffering mode and (optionally) the memory used + * for buffering, for a given file handle. + * This function must only be called immediately after associating the file + * handle with a file, before any operations are called on the file handle. + * @param fh The file handle. + * @param buf A pointer to the memory area to use for buffering, or NULL to + * use internally assigned buffer memory. + * @param mode One of _IOFBF, _IOLBF, _IONBF. + * @param size Size of the memory area to be used for buffering. + */ +int setvbuf( FILE * restrict fh, char * restrict buf, int mode, size_t size ); + +/** SET BUFfer. Equivalent to (void) setvbuf( fh, buf, _IOFBF, BUFSIZ ), or + * (void) setvbuf( fh, NULL, _IONBF, BUFSIZ ) if buf == NULL. + * @param fh The file handle to be passed to setvbuf(). + * @param buf The buffer pointer to be passed to setvbuf(). + */ +void setbuf( FILE * restrict fh, char * restrict buf ); + +/* ------------------------------------------------------------------------- */ + +/* PDPC code - unreviewed +/* + What we have is an internal buffer, which is 8 characters + longer than the actually used buffer. E.g. say BUFSIZ is + 512 bytes, then we actually allocate 520 bytes. The first + 2 characters will be junk, the next 2 characters set to NUL, + for protection against some backward-compares. The fourth-last + character is set to '\n', to protect against overscan. The + last 3 characters will be junk, to protect against memory + violation. intBuffer is the internal buffer, but everyone refers + to fbuf, which is actually set to the &intBuffer[4]. Also, + szfbuf is the size of the "visible" buffer, not the internal + buffer. The reason for the 2 junk characters at the beginning + is to align the buffer on a 4-byte boundary. +*/ + +typedef struct +{ +#if (defined(__OS2__) || defined(__32BIT__)) + unsigned long hfile; /* OS/2 file handle */ +#endif +#if (defined(__MSDOS__) || defined(__DOS__) || defined(__POWERC)) + int hfile; /* dos file handle */ +#endif +#if (defined(__MVS__)) + void *hfile; + int recfm; + int style; + int lrecl; + char ddname[9]; +#endif + int quickBin; /* 1 = do DosRead NOW!!!! */ + int quickText; /* 1 = quick text mode */ + int textMode; /* 1 = text mode, 0 = binary mode */ + int intFno; /* internal file number */ + unsigned long bufStartR; /* buffer start represents, e.g. if we + have read in 3 buffers, each of 512 bytes, and we are + currently reading from the 3rd buffer, then the first + character in the buffer would be 1024, so that is what is + put in bufStartR. */ + char *fbuf; /* file buffer - this is what all the routines + look at. */ + size_t szfbuf; /* size of file buffer (the one that the routines + see, and the user allocates, and what is actually + read in from disk) */ + char *upto; /* what character is next to read from buffer */ + char *endbuf; /* pointer PAST last character in buffer, ie it + points to the '\n' in the internal buffer */ + int errorInd; /* whether an error has occurred on this file */ + int eofInd; /* whether EOF has been reached on this file */ + int ungetCh; /* character pushed back, -1 if none */ + int bufTech; /* buffering technique, _IOFBF etc */ + char *intBuffer; /* internal buffer */ + int noNl; /* When doing gets, we don't copy NL */ + int mode; /* __WRITE_MODE or __READ_MODE */ + int update; /* Is file update (read + write)? */ + int theirBuffer; /* Is the buffer supplied by them? */ +} FILE; + +#endif /* _STDIO_H */