1 /* 2 * pANS stdio.h 3 */ 4 /* 5 * According to X3J11, there is only one i/o buffer 6 * and it must not be occupied by both input and output data. 7 * If rp<wp, we must have state==RD and 8 * if wp<rp, we must have state==WR, so that getc and putc work correctly. 9 * On open, rp, wp and buf are set to 0, so first getc or putc will call _IO_getc 10 * or _IO_putc, which will allocate the buffer. 11 * If setvbuf(., ., _IONBF, .) is called, bufl is set to 0 and 12 * buf, rp and wp are pointed at unbuf. 13 * If setvbuf(., ., _IOLBF, .) is called, _IO_putc leaves wp and rp pointed at the 14 * end of the buffer so that it can be called on each putc to check whether it's got 15 * a newline. This nonsense is in order to avoid impacting performance of the other 16 * buffering modes more than necessary -- putting the test in putc adds many 17 * instructions that are wasted in non-_IOLBF mode: 18 * #define putc(c, f) (_IO_ctmp=(c),\ 19 * (f)->wp>=(f)->rp || (f)->flags&LINEBUF && _IO_ctmp=='\n'\ 20 * ?_IO_putc(_IO_ctmp, f)\ 21 * :*(f)->wp++=_IO_ctmp) 22 * 23 */ 24 typedef struct{ 25 int fd; /* UNIX file pointer */ 26 char flags; /* bits for must free buffer on close, line-buffered */ 27 char state; /* last operation was read, write, position, error, eof */ 28 char *buf; /* pointer to i/o buffer */ 29 char *rp; /* read pointer (or write end-of-buffer) */ 30 char *wp; /* write pointer (or read end-of-buffer) */ 31 char *lp; /* actual write pointer used when line-buffering */ 32 long bufl; /* actual length of buffer */ 33 char unbuf[1]; /* tiny buffer for unbuffered io (used for ungetc?) */ 34 }FILE; 35 typedef long fpos_t; 36 #ifndef NULL 37 #define NULL 0 38 #endif 39 /* 40 * Third arg of setvbuf 41 */ 42 #define _IOFBF 1 /* block-buffered */ 43 #define _IOLBF 2 /* line-buffered */ 44 #define _IONBF 3 /* unbuffered */ 45 #define BUFSIZ 4096 /* size of setbuf buffer */ 46 #define EOF (-1) /* returned on end of file */ 47 #define FOPEN_MAX 128 /* max files open */ 48 #define FILENAME_MAX BUFSIZ /* silly filename length */ 49 #define L_tmpnam 20 /* sizeof "/tmp/abcdefghij9999 */ 50 #define SEEK_CUR 1 51 #define SEEK_END 2 52 #define SEEK_SET 0 53 #define TMP_MAX 64 /* very hard to set correctly */ 54 #define stderr (&_IO_stream[2]) 55 #define stdin (&_IO_stream[0]) 56 #define stdout (&_IO_stream[1]) 57 #define _IO_CHMASK 0377 /* mask for 8 bit characters */ 58 FILE *tmpfile(void); 59 char *tmpnam(char *); 60 int fclose(FILE *); 61 int fflush(FILE *); 62 FILE *fopen(const char *, const char *); 63 FILE *freopen(const char *, const char *, FILE *); 64 void setbuf(FILE *, char *); 65 int setvbuf(FILE *, char *, int, long); 66 int fprintf(FILE *, const char *, ...); 67 int fscanf(FILE *, const char *, ...); 68 int printf(const char *, ...); 69 int scanf(const char *, ...); 70 int sprintf(char *, const char *, ...); 71 int sscanf(const char *, const char *, ...); 72 int vfprintf(FILE *, const char *, va_list); 73 int vprintf(const char *, va_list); 74 int vsprintf(char *, const char *, va_list); 75 int vfscanf(FILE *, const char *, va_list); 76 int fgetc(FILE *); 77 char *fgets(char *, int, FILE *); 78 int fputc(int, FILE *); 79 int fputs(const char *, FILE *); 80 int getc(FILE *); 81 #define getc(f) ((f)->rp>=(f)->wp?_IO_getc(f):*(f)->rp++&_IO_CHMASK) 82 int _IO_getc(FILE *f); 83 int getchar(void); 84 #define getchar() getc(stdin) 85 char *gets(char *); 86 int putc(int, FILE *); 87 #define putc(c, f) ((f)->wp>=(f)->rp?_IO_putc(c, f):(*(f)->wp++=c)&_IO_CHMASK) 88 int _IO_putc(int, FILE *); 89 int putchar(int); 90 #define putchar(c) putc(c, stdout) 91 int puts(const char *); 92 int ungetc(int, FILE *); 93 long fread(void *, long, long, FILE *); 94 long fwrite(const void *, long, long, FILE *); 95 int fgetpos(FILE *, fpos_t *); 96 int fseek(FILE *, long int, int); 97 int fsetpos(FILE *, const fpos_t *); 98 long int ftell(FILE *); 99 void rewind(FILE *); 100 void clearerr(FILE *); 101 int feof(FILE *); 102 int ferror(FILE *); 103 void perror(const char *); 104 extern FILE _IO_stream[FOPEN_MAX]; 105 FILE *sopenr(const char *); 106 FILE *sopenw(void); 107 char *sclose(FILE *); 108 char *dtoa(double, int, int, int*, int*, char**); 109 void freedtoa(char*); 110