GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
* @file include/gnunet_bio_lib.h
* @brief buffered IO API
* @author Christian Grothoff
+ * @defgroup bio Buffered binary disk IO (with endianess conversion)
+ * @{
*/
#ifndef GNUNET_BIO_LIB_H
#endif
/**
+ * @ingroup bio
* Handle for buffered reading.
*/
struct GNUNET_BIO_ReadHandle;
* @param fn file name to be opened
* @return IO handle on success, NULL on error
*/
-struct GNUNET_BIO_ReadHandle *GNUNET_BIO_read_open (const char *fn);
+struct GNUNET_BIO_ReadHandle *
+GNUNET_BIO_read_open (const char *fn);
/**
*
* @param h file handle
* @param emsg set to the error message
- * @return GNUNET_OK on success, GNUNET_SYSERR otherwise
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR otherwise
*/
-int GNUNET_BIO_read_close (struct GNUNET_BIO_ReadHandle *h,
- char **emsg);
+int
+GNUNET_BIO_read_close (struct GNUNET_BIO_ReadHandle *h, char **emsg);
/**
* @param what describes what is being read (for error message creation)
* @param result the buffer to write the result to
* @param len the number of bytes to read
- * @return GNUNET_OK on success, GNUNET_SYSERR on failure
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
+ */
+int
+GNUNET_BIO_read (struct GNUNET_BIO_ReadHandle *h, const char *what,
+ void *result, size_t len);
+
+
+/**
+ * Read the contents of a binary file into a buffer.
+ *
+ * @param h handle to an open file
+ * @param file name of the source file
+ * @param line line number in the source file
+ * @param result the buffer to write the result to
+ * @param len the number of bytes to read
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
*/
-int GNUNET_BIO_read (struct GNUNET_BIO_ReadHandle *h,
- const char *what,
- void *result,
- size_t len);
+int
+GNUNET_BIO_read_fn (struct GNUNET_BIO_ReadHandle *h,
+ const char *file, int line,
+ void *result, size_t len);
/**
* Read 0-terminated string from a file.
* @param what describes what is being read (for error message creation)
* @param result the buffer to store a pointer to the (allocated) string to
* (note that *result could be set to NULL as well)
- * @param maxLen maximum allowed length for the string
- * @return GNUNET_OK on success, GNUNET_SYSERR on failure
+ * @param max_length maximum allowed length for the string
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
*/
-int GNUNET_BIO_read_string (struct GNUNET_BIO_ReadHandle *h,
- const char *what,
- char **result,
- size_t maxLen);
+int
+GNUNET_BIO_read_string (struct GNUNET_BIO_ReadHandle *h, const char *what,
+ char **result, size_t max_length);
/**
* @param h handle to an open file
* @param what describes what is being read (for error message creation)
* @param result the buffer to store a pointer to the (allocated) metadata
- * @return GNUNET_OK on success, GNUNET_SYSERR on failure
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
*/
-int GNUNET_BIO_read_meta_data (struct GNUNET_BIO_ReadHandle *h,
- const char *what,
- struct GNUNET_CONTAINER_MetaData **result);
+int
+GNUNET_BIO_read_meta_data (struct GNUNET_BIO_ReadHandle *h, const char *what,
+ struct GNUNET_CONTAINER_MetaData **result);
/**
*
* @param h hande to open file
* @param f address of float to read
- */
-#define GNUNET_BIO_read_float(h, f) (sizeof(float) == GNUNET_BIO_read (h, __FILE__ "##__LINE__##", f, sizeof(float)))
+ */
+#define GNUNET_BIO_read_float(h, f) (GNUNET_BIO_read_fn (h, __FILE__, __LINE__, f, sizeof(float)))
*
* @param h hande to open file
* @param f address of double to read
- */
-#define GNUNET_BIO_read_double(h, f) (sizeof(double) == GNUNET_BIO_read (h, __FILE__ "##__LINE__##", f, sizeof(double)))
+ */
+#define GNUNET_BIO_read_double(h, f) (GNUNET_BIO_read_fn (h, __FILE__, __LINE__, f, sizeof(double)))
/**
* Read an (u)int32_t.
*
* @param h hande to open file
- * @param what describes what is being read (for error message creation)
+ * @param file name of the source file
+ * @param line line number in the code
* @param i address of 32-bit integer to read
- * @return GNUNET_OK on success, GNUNET_SYSERR on error
- */
-int GNUNET_BIO_read_int32__ (struct GNUNET_BIO_ReadHandle *h,
- const char *what,
- int32_t *i);
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ */
+int
+GNUNET_BIO_read_int32__ (struct GNUNET_BIO_ReadHandle *h, const char *file,
+ int line, int32_t * i);
/**
*
* @param h hande to open file
* @param i address of 32-bit integer to read
- */
-#define GNUNET_BIO_read_int32(h, i) GNUNET_BIO_read_int32__ (h, __FILE__ "##__LINE__##", (int32_t*) i)
+ */
+#define GNUNET_BIO_read_int32(h, i) GNUNET_BIO_read_int32__ (h, __FILE__, __LINE__, (int32_t*) i)
/**
* Read an (u)int64_t.
*
* @param h hande to open file
- * @param what describes what is being read (for error message creation)
+ * @param file name of the source file
+ * @param line line number in the code
* @param i address of 64-bit integer to read
- * @return GNUNET_OK on success, GNUNET_SYSERR on error
- */
-int GNUNET_BIO_read_int64__ (struct GNUNET_BIO_ReadHandle *h,
- const char *what,
- int64_t *i);
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ */
+int
+GNUNET_BIO_read_int64__ (struct GNUNET_BIO_ReadHandle *h, const char *file,
+ int line, int64_t * i);
/**
*
* @param h hande to open file
* @param i address of 64-bit integer to read
- */
-#define GNUNET_BIO_read_int64(h, i) (sizeof(int64_t) == GNUNET_BIO_read (h, __FILE__ "##__LINE__##", (int64_t*) i, sizeof(int64_t)))
+ */
+#define GNUNET_BIO_read_int64(h, i) GNUNET_BIO_read_int64__ (h, __FILE__, __LINE__, (int64_t*) i)
/**
* Handle for buffered writing.
*/
struct GNUNET_BIO_WriteHandle;
+
/**
* Open a file for writing.
*
* @param fn file name to be opened
* @return IO handle on success, NULL on error
*/
-struct GNUNET_BIO_WriteHandle *GNUNET_BIO_write_open (const char *fn);
+struct GNUNET_BIO_WriteHandle *
+GNUNET_BIO_write_open (const char *fn);
/**
* @param h file handle
* @return GNUNET_OK on success, GNUNET_SYSERR otherwise
*/
-int GNUNET_BIO_write_close (struct GNUNET_BIO_WriteHandle *h);
+int
+GNUNET_BIO_write_close (struct GNUNET_BIO_WriteHandle *h);
/**
* @param h handle to open file
* @param buffer the data to write
* @param n number of bytes to write
- * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ */
+int
+GNUNET_BIO_write (struct GNUNET_BIO_WriteHandle *h, const void *buffer,
+ size_t n);
+
+
+/**
+ * Force a buffered writer to flush its buffer
+ *
+ * @param h the writer handle
+ * @return #GNUNET_OK upon success. Upon failure #GNUNET_SYSERR is returned and
+ * the file is closed
*/
-int GNUNET_BIO_write (struct GNUNET_BIO_WriteHandle *h,
- const void *buffer,
- size_t n);
+int
+GNUNET_BIO_flush (struct GNUNET_BIO_WriteHandle *h);
/**
*
* @param h handle to open file
* @param s string to write (can be NULL)
- * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
*/
-int GNUNET_BIO_write_string (struct GNUNET_BIO_WriteHandle *h,
- const char *s);
-
-
+int
+GNUNET_BIO_write_string (struct GNUNET_BIO_WriteHandle *h, const char *s);
/**
*
* @param h handle to open file
* @param m metadata to write
- * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
*/
-int GNUNET_BIO_write_meta_data (struct GNUNET_BIO_WriteHandle *h,
- const struct GNUNET_CONTAINER_MetaData *m);
+int
+GNUNET_BIO_write_meta_data (struct GNUNET_BIO_WriteHandle *h,
+ const struct GNUNET_CONTAINER_MetaData *m);
*
* @param h hande to open file
* @param f float to write (must be a variable)
- */
-#define GNUNET_BIO_write_float(h, f) (sizeof(float) == GNUNET_BIO_write (h, &f, sizeof(float)))
+ */
+#define GNUNET_BIO_write_float(h, f) GNUNET_BIO_write (h, &f, sizeof(float))
*
* @param h hande to open file
* @param f double to write (must be a variable)
- */
-#define GNUNET_BIO_write_double(h, f) (sizeof(double) == GNUNET_BIO_write (h, &f, sizeof(double)))
+ */
+#define GNUNET_BIO_write_double(h, f) GNUNET_BIO_write (h, &f, sizeof(double))
/**
* Write an (u)int32_t.
*
* @param h hande to open file
- * @param i address of 32-bit integer to write
- * @return GNUNET_OK on success, GNUNET_SYSERR on error
- */
-int GNUNET_BIO_write_int32 (struct GNUNET_BIO_WriteHandle *h,
- int32_t i);
+ * @param i 32-bit integer to write
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ */
+int
+GNUNET_BIO_write_int32 (struct GNUNET_BIO_WriteHandle *h, int32_t i);
/**
* Write an (u)int64_t.
*
* @param h hande to open file
- * @param i address of 64-bit integer to write
- * @return GNUNET_OK on success, GNUNET_SYSERR on error
- */
-int GNUNET_BIO_write_int64 (struct GNUNET_BIO_WriteHandle *h,
- int64_t i);
+ * @param i 64-bit integer to write
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ */
+int
+GNUNET_BIO_write_int64 (struct GNUNET_BIO_WriteHandle *h, int64_t i);
#if 0 /* keep Emacsens' auto-indent happy */
}
#endif
+/** @} */ /* end of group bio */
+
/* ifndef GNUNET_BIO_LIB_H */
#endif
/* end of gnunet_bio_lib.h */
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