1987cc69c8
When calling putc, we need to return either EOF or the character returned. To distinguish the two, we need to avoid sign extending 0xff. The code attempted to do this, but the order of operations was wrong, so we ended up masking, setting a character, and then sign extending the character. This fixes things so we mask after assignment.
152 lines
5 KiB
C
152 lines
5 KiB
C
#ifndef _STDIO_H_
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#define _STDIO_H_
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#pragma lib "/$M/lib/ape/libap.a"
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/*
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* pANS stdio.h
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*/
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#include <stdarg.h>
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#include <stddef.h>
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#include <sys/types.h>
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/*
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* According to X3J11, there is only one i/o buffer
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* and it must not be occupied by both input and output data.
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* If rp<wp, we must have state==RD and
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* if wp<rp, we must have state==WR, so that getc and putc work correctly.
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* On open, rp, wp and buf are set to 0, so first getc or putc will call _IO_getc
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* or _IO_putc, which will allocate the buffer.
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* If setvbuf(., ., _IONBF, .) is called, bufl is set to 0 and
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* buf, rp and wp are pointed at unbuf.
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* If setvbuf(., ., _IOLBF, .) is called, _IO_putc leaves wp and rp pointed at the
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* end of the buffer so that it can be called on each putc to check whether it's got
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* a newline. This nonsense is in order to avoid impacting performance of the other
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* buffering modes more than necessary -- putting the test in putc adds many
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* instructions that are wasted in non-_IOLBF mode:
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* #define putc(c, f) (_IO_ctmp=(c),\
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* (f)->wp>=(f)->rp || (f)->flags&LINEBUF && _IO_ctmp=='\n'\
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* ?_IO_putc(_IO_ctmp, f)\
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* :*(f)->wp++=_IO_ctmp)
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*
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*/
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typedef struct{
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int fd; /* UNIX file pointer */
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char flags; /* bits for must free buffer on close, line-buffered */
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char state; /* last operation was read, write, position, error, eof */
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char *buf; /* pointer to i/o buffer */
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char *rp; /* read pointer (or write end-of-buffer) */
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char *wp; /* write pointer (or read end-of-buffer) */
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char *lp; /* actual write pointer used when line-buffering */
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size_t bufl; /* actual length of buffer */
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char unbuf[1]; /* tiny buffer for unbuffered io (used for ungetc?) */
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}FILE;
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typedef long long fpos_t;
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#ifndef NULL
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#ifdef __cplusplus
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#define NULL 0
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#else
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#define NULL ((void*)0)
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#endif
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#endif
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/*
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* Third arg of setvbuf
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*/
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#define _IOFBF 1 /* block-buffered */
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#define _IOLBF 2 /* line-buffered */
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#define _IONBF 3 /* unbuffered */
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#define BUFSIZ 4096 /* size of setbuf buffer */
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#define EOF (-1) /* returned on end of file */
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#define FOPEN_MAX 90 /* max files open */
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#define FILENAME_MAX BUFSIZ /* silly filename length */
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#define L_tmpnam 20 /* sizeof "/tmp/abcdefghij9999 */
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#define L_cuserid 32 /* maximum size user name */
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#define L_ctermid 32 /* size of name of controlling tty */
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#define SEEK_CUR 1
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#define SEEK_END 2
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#define SEEK_SET 0
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#define TMP_MAX 64 /* very hard to set correctly */
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#define stderr (&_IO_stream[2])
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#define stdin (&_IO_stream[0])
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#define stdout (&_IO_stream[1])
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#define _IO_CHMASK 0377 /* mask for 8 bit characters */
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern int remove(const char *);
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extern int rename(const char *, const char *);
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extern FILE *tmpfile(void);
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extern char *tmpnam(char *);
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extern int fclose(FILE *);
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extern int fflush(FILE *);
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extern FILE *fopen(const char *, const char *);
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extern FILE *freopen(const char *, const char *, FILE *);
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extern void setbuf(FILE *, char *);
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extern int setvbuf(FILE *, char *, int, size_t);
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extern int fprintf(FILE *, const char *, ...);
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extern int fscanf(FILE *, const char *, ...);
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extern int printf(const char *, ...);
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extern int scanf(const char *, ...);
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extern int sprintf(char *, const char *, ...);
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extern int snprintf(char *, size_t, const char *, ...);
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extern int vsnprintf(char *, size_t, const char *, va_list);
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extern int sscanf(const char *, const char *, ...);
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extern int vfprintf(FILE *, const char *, va_list);
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extern int vprintf(const char *, va_list);
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extern int vsprintf(char *, const char *, va_list);
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extern int vfscanf(FILE *, const char *, va_list);
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extern int fgetc(FILE *);
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extern char *fgets(char *, int, FILE *);
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extern int fputc(int, FILE *);
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extern int fputs(const char *, FILE *);
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extern int getc(FILE *);
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#define getc(f) ((f)->rp>=(f)->wp?_IO_getc(f):*(f)->rp++&_IO_CHMASK)
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extern int _IO_getc(FILE *f);
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extern int getchar(void);
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#define getchar() getc(stdin)
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extern char *gets(char *);
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extern int putc(int, FILE *);
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#define putc(c, f) ((f)->wp>=(f)->rp?_IO_putc(c, f):((*(f)->wp++=(c))&_IO_CHMASK))
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extern int _IO_putc(int, FILE *);
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extern int putchar(int);
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#define putchar(c) putc(c, stdout)
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extern int puts(const char *);
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extern int ungetc(int, FILE *);
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extern size_t fread(void *, size_t, size_t, FILE *);
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extern size_t fwrite(const void *, size_t, size_t, FILE *);
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extern int fgetpos(FILE *, fpos_t *);
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extern int fseek(FILE *, long, int);
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extern int fseeko(FILE *, off_t, int);
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extern int fsetpos(FILE *, const fpos_t *);
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extern long ftell(FILE *);
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extern off_t ftello(FILE *);
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extern void rewind(FILE *);
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extern void clearerr(FILE *);
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extern int feof(FILE *);
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extern int ferror(FILE *);
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extern void perror(const char *);
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extern FILE _IO_stream[FOPEN_MAX];
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#ifdef _POSIX_SOURCE
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extern int fileno(FILE *);
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extern FILE* fdopen(int, const char*);
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extern char *ctermid(char *);
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#endif
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#ifdef _REENTRANT_SOURCE
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extern char *tmpnam_r(char *);
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extern char *ctermid_r(char *);
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#endif
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#ifdef _BSD_EXTENSION
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#pragma lib "/$M/lib/ape/libbsd.a"
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extern FILE *popen(char *, char *);
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extern int pclose(FILE *);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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