apps/include/stdio.h

   1 /*
   2     meinOS - A unix-like x86 microkernel operating system
   3     Copyright (C) 2008  Janosch Gräf <janosch.graef@gmx.net>
   4
   5     This program is free software: you can redistribute it and/or modify
   6     it under the terms of the GNU Lesser General Public License as published by
   7     the Free Software Foundation, either version 3 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU Lesser General Public License for more details.
  14
  15     You should have received a copy of the GNU Lesser General Public License
  16     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #ifndef _STDIO_H_
  20 #define _STDIO_H_
  21
  22 #include <sys/types.h>
  23 #include <stdarg.h>
  24 #include <unistd.h>
  25 #include <string.h>
  26 #include <errno.h>
  27
  28 #define BUFSIZ 2*1024
  29
  30 #define _IOLBF
  31
  32 #define SEEK_SET 0
  33 #define SEEK_CUR 1
  34 #define SEEK_END 2
  35
  36 #define EOF -1
  37
  38 #ifndef NULL
  39   #define NULL ((void*)0)
  40 #endif
  41
  42 #define L_tmpnam PATH_MAX
  43 #define P_tmpdir "/tmp"
  44
  45 typedef struct {
  46   int fh;
  47   int error;
  48   int oflag;
  49   int eof;
  50   void *buf;
  51   void *bufcur;
  52   int dobuf;
  53 } FILE;
  54
  55 typedef off_t fpos_t;
  56
  57 FILE *stdin;
  58 FILE *stdout;
  59 FILE *stderr;
  60
  61 void clearerr(FILE *file);
  62 int feof(FILE *stream);
  63 int ferror(FILE *stream);
  64 int fclose(FILE *stream);
  65 FILE *fdopen(int fh,const char *oflag);
  66 int fileno(FILE *stream);
  67 FILE *fopen(const char *name,const char *oflag);
  68 int fflush(FILE *stream);
  69 int fgetpos(FILE *stream,fpos_t *pos);
  70 int fsetpos(FILE *stream,fpos_t *pos);
  71 FILE *freopen(const char *filename,const char *oflag,FILE *stream);
  72
  73 int rename(const char *old, const char *new);
  74
  75 int puts(const char *s);
  76 size_t _fwrite(const void *ptr,size_t size,FILE *stream);
  77
  78 char *fgets(char *s,int n,FILE *stream);
  79 size_t _fread(void *ptr,size_t size,FILE *stream);
  80 int ungetc(int c,FILE *stream);
  81
  82 int printf(const char * format, ...);
  83 int sprintf(char * buffer, const char * format, ...);
  84 int snprintf(char * buffer, size_t size, const char * format, ...);
  85 int fprintf(FILE * fp, const char * format, ...);
  86 int asprintf(char ** buffer, const char * format, ...);
  87
  88 int vprintf(const char * format, va_list);
  89 int vsprintf(char * buffer, const char * format, va_list);
  90 int vsnprintf(char * buffer, size_t size, const char * format, va_list);
  91 int vfprintf(FILE * fp, const char * format, va_list);
  92 int vasprintf(char ** buffer, const char * format, va_list);
  93
  94 int sscanf(const char *str,const char *format,...);
  95
  96 int vsscanf(const char *buffer,const char *format,va_list ap);
  97
  98
  99 static __inline__ int remove(const char *path) {
 100   return unlink(path);
 101 }
 102
 103 /**
 104  * Puts a char on stream
 105  *  @param c Character
 106  *  @param stream Stream
 107  *  @return Char written
 108  */
 109 static __inline__ int fputc(int c,FILE *stream) {
 110   char chr = c;
 111   return _fwrite(&chr,1,stream)==1?c:EOF;
 112 }
 113
 114 /**
 115  * Puts a string on a stream
 116  *  @param s String to put on stream
 117  *  @param stream Stream
 118  *  @return How many bytes written
 119  */
 120 static __inline__ int fputs(const char *s,FILE *stream) {
 121   return _fwrite(s,strlen(s),stream);
 122 }
 123
 124 /**
 125  * Writes binary
 126  *  @param ptr Buffer to get data from
 127  *  @param size Size of each element
 128  *  @param nitems How many items to write
 129  *  @param stream Stream to write to
 130  *  @return How many elements written
 131  */
 132 static __inline__ size_t fwrite(const void *ptr,size_t size,size_t nelem,FILE *stream) {
 133   return _fwrite(ptr,size*nelem,stream);
 134 }
 135
 136 /**
 137  * Seeks in stream
 138  *  @param stream Stream
 139  *  @param offset Offset
 140  *  @param whence Whence
 141  *  @return Success?
 142  */
 143 static __inline__ int fseeko(FILE *stream,off_t offset,int whence) {
 144   fflush(stream);
 145   return lseek(stream->fh,offset,whence)==offset?0:-1;
 146 }
 147
 148 /**
 149  * Seeks in stream
 150  *  @param stream Stream
 151  *  @param offset Offset
 152  *  @param whence Whence
 153  *  @return Success?
 154  */
 155 static __inline__ int fseek(FILE *stream,long offset,int whence) {
 156   return fseeko(stream,(off_t)offset,whence);
 157 }
 158
 159 /**
 160  * Returns file offset in stream
 161  *  @param stream Stream
 162  *  @return Offset
 163  */
 164 static __inline__ off_t ftello(FILE *stream) {
 165   return lseek(stream->fh,0,SEEK_CUR);
 166 }
 167
 168 /**
 169  * Returns file offset in stream
 170  *  @param stream Stream
 171  *  @return Offset
 172  */
 173 static __inline__ long ftell(FILE *stream) {
 174   fflush(stream);
 175   return (long)ftello(stream);
 176 }
 177
 178 /**
 179  * Resets the file position idicator
 180  *  @param stream Stream
 181  */
 182 static __inline__ void rewind(FILE *stream) {
 183   fseek(stream,0,SEEK_SET);
 184 }
 185
 186 /**
 187  * Puts a character on stream
 188  *  @param c Character
 189  *  @param stream Stream
 190  *  @return Character
 191  */
 192 static __inline__ int putc(int c,FILE *stream) {
 193   return fputc(c,stream);
 194 }
 195
 196 /**
 197  * Puts a character on stdout
 198  *  @param c Character
 199  *  @param stream Stream
 200  *  @return Character
 201  */
 202 static __inline__ int putchar(int c) {
 203   return fputc(c,stdout);
 204 }
 205
 206 /**
 207  * Gets char from stream
 208  *  @param stream Stream
 209  *  @return Character
 210  */
 211 static __inline__ int fgetc(FILE *stream) {
 212   char c = EOF;
 213   _fread(&c,1,stream);
 214   if (c==EOF) stream->eof = 1;
 215   return c;
 216 }
 217
 218 /**
 219  * Gets string from stdin
 220  *  @param s Buffer for string
 221  *  @return
 222  */
 223 static __inline__ char* gets(char *s) {
 224   return fgets(s,BUFSIZ,stdin);
 225 }
 226
 227 /**
 228  * Gets a character from stream
 229  *  @param stream Stream
 230  *  @return Character
 231  */
 232 static __inline__ int getc(FILE *stream) {
 233   return fgetc(stream);
 234 }
 235
 236 /**
 237  * Gets a character from stdin
 238  *  @return Character
 239  */
 240 static __inline__ int getchar(void) {
 241   return fgetc(stdin);
 242 }
 243
 244 /**
 245  * Reads binary
 246  *  @param ptr Buffer to store data
 247  *  @param size Size of each element
 248  *  @param nitems How many items to read
 249  *  @param stream Stream to read from
 250  *  @return How many elements read
 251  */
 252 static __inline__ size_t fread(void *ptr,size_t size,size_t nitems,FILE *stream) {
 253   return _fread(ptr,size*nitems,stream);
 254 }
 255
 256 /**
 257  * Writes error message to stderr
 258  *  @param str Additional error text (can be NULL)
 259  */
 260 static __inline__ void perror(const char *str) {
 261   fprintf(stderr,"%s: %s\n",str!=NULL?str:"",strerror(errno));
 262 }
 263
 264
 265 #endif