/[osn-commons]/trunk/plibc/lib/stdio.c

Diff of /trunk/plibc/lib/stdio.c

Parent Directory | Revision Log | View Patch Patch

-revision 50 by rakinar2,
Thu Aug 15 18:10:51 2024 UTC
+revision 51 by rakinar2,
Fri Aug 16 18:34:43 2024 UTC
 Line 1
  #include "stdio.h"
+ #include "malloc.h"
  #include "string.h"
- #include "syscalls.h"
+ #include "unistd.h"
  #include <stdbool.h>
- #define STDOUT_FILENO 1
- #define STDERR_FILENO 2
  enum printf_size
  {
      PS_DEFAULT,
-Line 295 
 int
+Line 293 
 int
  putchar (int c)
  {
      return write (STDOUT_FILENO, &c, 1);
+ }
+ #define FBUFSIZ 1024
+ static int
+ fmode_to_flags (const char *mode)
+ {
+     int flags = 0;
+     if (mode[0] == 'r')
+         flags = O_RDONLY;
+     else if (mode[0] == 'w')
+         flags = O_WRONLY | O_CREAT | O_TRUNC;
+     else if (mode[0] == 'a')
+         flags = O_WRONLY | O_CREAT | O_APPEND;
+     else
+         return -1;
+     if (mode[1] == '+')
+         {
+             flags &= ~(O_RDONLY | O_WRONLY);
+             flags |= O_RDWR;
+         }
+     return flags;
+ }
+ FILE *
+ fopen (const char *pathname, const char *mode)
+ {
+     int flags = fmode_to_flags (mode);
+     if (flags == -1)
+         return NULL;
+     int fd = open (pathname, flags);
+     if (fd < 0)
+         return NULL;
+     FILE *file = malloc (sizeof (FILE));
+     if (file == NULL)
+         {
+             close (fd);
+             return NULL;
+         }
+     file->fd = fd;
+     file->buf = malloc (FBUFSIZ);
+     file->buf_size = 0;
+     file->mode = flags;
+     return file;
+ }
+ int
+ fclose (FILE *file)
+ {
+     fflush (file);
+     int ret = close (file->fd);
+     if (ret < 0)
+         return ret;
+     free (file->buf);
+     free (file);
+     return 0;
+ }
+ size_t
+ fwrite (const void *ptr, size_t size, size_t nmemb, FILE *stream)
+ {
+     size_t total = size * nmemb;
+     size_t written = 0;
+     char buf[FBUFSIZ];
+     while (total)
+         {
+             size_t to_write = total;
+             if (to_write > FBUFSIZ)
+                 to_write = FBUFSIZ;
+             memcpy (buf, ptr, to_write);
+             int ret = write (stream->fd, buf, to_write);
+             if (ret < 0)
+                 return ret;
+             total -= to_write;
+             written += to_write;
+         }
+     return written;
+ }
+ int
+ fputs (const char *str, FILE *stream)
+ {
+     while (*str)
+         {
+             ((unsigned char *) stream->buf)[stream->buf_size++] = *str;
+             if (stream->buf_size >= FBUFSIZ || *str == '\n')
+                 {
+                     int ret = fwrite (stream->buf, 1, stream->buf_size, stream);
+                     if (ret < 0)
+                         return ret;
+                     stream->buf_size = 0;
+                 }
+             str++;
+         }
+     return 0;
+ }
+ int
+ fflush (FILE *stream)
+ {
+     if (stream->buf_size == 0)
+         return 0;
+     return fwrite (stream->buf, 1, stream->buf_size, stream);
+ }
+ FILE *
+ fdopen (int fd, const char *mode)
+ {
+     int flags = fmode_to_flags (mode);
+     if (flags == -1)
+         return NULL;
+     FILE *file = malloc (sizeof (FILE));
+     if (file == NULL)
+         return NULL;
+     file->fd = fd;
+     file->buf = malloc (FBUFSIZ);
+     file->buf_size = 0;
+     file->mode = flags;
+     return file;
  }

 Legend:



Removed from v.50
 


changed lines


 
Added in v.51
 Legend:



Removed from v.50
 


changed lines


 
Added in v.51
-Removed from v.50
+Added in v.51

[email protected]	ViewVC Help
Powered by ViewVC 1.1.26