/*
- silcbuffmt.h
+ silcbuffmt.h
- Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
+ Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 1997 - 2000 Pekka Riikonen
+ Copyright (C) 1997 - 2003 Pekka Riikonen
This program 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 of the License, or
- (at your option) any later version.
+ the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
*
* DESCRIPTION
*
- * SILC Buffer Format API provides a few functions for formatting
- * various different data types into a buffer, and retrieving
- * various data from buffer into specific data types. It is usefull
- * to format for example packets and later unformat them.
+ * SILC Buffer Format API provides a few functions for formatting
+ * various different data types into a buffer, and retrieving
+ * various data from buffer into specific data types. It is usefull
+ * to format for example packets and later unformat them.
*
***/
#ifndef SILCBUFFMT_H
#define SILCBUFFMT_H
+/* Prototypes */
+
+/****f* silcutil/SilcBufferFormatAPI/silc_buffer_format
+ *
+ * SYNOPSIS
+ *
+ * int silc_buffer_format(SilcBuffer dst, ...);
+ *
+ * DESCRIPTION
+ *
+ * Formats a buffer from a variable argument list. Returns -1 on error
+ * and the length of the formatted buffer otherwise.
+ *
+ * EXAMPLE
+ *
+ * ret = silc_buffer_format(buffer,
+ * SILC_STR_INT(intval),
+ * SILC_STR_CHAR(charval),
+ * SILC_STR_INT(intval),
+ * SILC_STR_SHORT(str_len),
+ * SILC_STR_UI_XNSTRING(str, str_len),
+ * SILC_STR_END);
+ * if (ret < 0)
+ * error;
+ *
+ ***/
+int silc_buffer_format(SilcBuffer dst, ...);
+
+/****f* silcutil/SilcBufferFormatAPI/silc_buffer_unformat
+ *
+ * SYNOPSIS
+ *
+ * int silc_buffer_unformat(SilcBuffer src, ...);
+ *
+ * DESCRIPTION
+ *
+ * Unformats a buffer from a variable argument list. Returns -1 on error
+ * and the length of the unformatted buffer otherwise.
+ *
+ * EXAMPLE
+ *
+ * ret = silc_buffer_unformat(buffer,
+ * SILC_STR_INT(&intval),
+ * SILC_STR_CHAR(&charval),
+ * SILC_STR_INT(&intval2),
+ * SILC_STR_SHORT(&str_len),
+ * SILC_STR_UI16_NSTRING_ALLOC(&str, &str_len),
+ * SILC_STR_END);
+ * if (ret < 0)
+ * error;
+ *
+ ***/
+int silc_buffer_unformat(SilcBuffer src, ...);
+
+/****f* silcutil/SilcBufferFormatAPI/silc_buffer_format_vp
+ *
+ * SYNOPSIS
+ *
+ * int silc_buffer_format_vp(SilcBuffer dst, va_list vp);
+ *
+ * DESCRIPTION
+ *
+ * Formats a buffer from a variable argument list indicated by the `ap'.
+ * Returns -1 on error and the length of the formatted buffer otherwise.
+ *
+ ***/
+int silc_buffer_format_vp(SilcBuffer dst, va_list ap);
+
+/****f* silcutil/SilcBufferFormatAPI/silc_buffer_unformat_vp
+ *
+ * SYNOPSIS
+ *
+ * int silc_buffer_unformat_vp(SilcBuffer src, va_list vp);
+ *
+ * DESCRIPTION
+ *
+ * Unformats a buffer from a variable argument list indicated by the `ap'.
+ * Returns -1 on error and the length of the unformatted buffer otherwise.
+ *
+ ***/
+int silc_buffer_unformat_vp(SilcBuffer src, va_list ap);
+
+/****f* silcutil/SilcBufferFormatAPI/silc_buffer_strformat
+ *
+ * SYNOPSIS
+ *
+ * int silc_buffer_strformat(SilcBuffer dst, ...);
+ *
+ * DESCRIPTION
+ *
+ * Formats a buffer from variable argument list of strings. Each
+ * string must be NULL-terminated and the variable argument list must
+ * be end with SILC_STR_END argument. This allows that a string in
+ * the list can be NULL, in which case it is skipped. This automatically
+ * allocates the space for the buffer data but `dst' must be already
+ * allocated by the caller.
+ *
+ * EXAMPLE
+ *
+ * ret = silc_buffer_strformat(buffer, "foo", "bar", SILC_STR_END);
+ * if (ret < 0)
+ * error;
+ *
+ ***/
+int silc_buffer_strformat(SilcBuffer dst, ...);
+
+/* Macros for expanding parameters into variable function argument list.
+ These are passed to silc_buffer_format and silc_buffer_unformat
+ functions. */
+
/* Buffer parameter types.
_SI_ = signed
SILC_BUFFER_PARAM_END
} SilcBufferParamType;
-/* Macros for expanding parameters into variable function argument list.
- These are passed to silc_buffer_format and silc_buffer_unformat
- functions. */
-
-/* One signed/unsigned character.
-
- Formatting: SILC_STR_SI_CHAR(char)
- SILC_STR_UI_CHAR(unsigned char)
- Unformatting: SILC_STR_SI_CHAR(char *)
- SILC_STR_UI_CHAR(unsigned char *)
-
-*/
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_*_CHAR
+ *
+ * NAME
+ *
+ * #define SILC_STR_UI_CHAR() ...
+ * #define SILC_STR_SI_CHAR() ...
+ *
+ * DESCRIPTION
+ *
+ * One signed/unsigned character.
+ *
+ * Formatting: SILC_STR_SI_CHAR(char)
+ * SILC_STR_UI_CHAR(unsigned char)
+ * Unformatting: SILC_STR_SI_CHAR(char *)
+ * SILC_STR_UI_CHAR(unsigned char *)
+ *
+ ***/
#define SILC_STR_SI_CHAR(x) SILC_BUFFER_PARAM_SI8_CHAR, (x)
#define SILC_STR_UI_CHAR(x) SILC_BUFFER_PARAM_UI8_CHAR, (x)
-/* Signed/SilcUInt16.
-
- Formatting: SILC_STR_SI_SHORT(short)
- SILC_STR_UI_SHORT(SilcUInt16)
- Unformatting: SILC_STR_SI_SHORT(short *)
- SILC_STR_UI_SHORT(SilcUInt16 *)
-
-*/
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_*_SHORT
+ *
+ * NAME
+ *
+ * #define SILC_STR_UI_SHORT() ...
+ * #define SILC_STR_SI_SHORT() ...
+ *
+ * DESCRIPTION
+ *
+ * Signed/SilcUInt16.
+ *
+ * Formatting: SILC_STR_SI_SHORT(short)
+ * SILC_STR_UI_SHORT(SilcUInt16)
+ * Unformatting: SILC_STR_SI_SHORT(short *)
+ * SILC_STR_UI_SHORT(SilcUInt16 *)
+ *
+ ***/
#define SILC_STR_SI_SHORT(x) SILC_BUFFER_PARAM_SI16_SHORT, (x)
#define SILC_STR_UI_SHORT(x) SILC_BUFFER_PARAM_UI16_SHORT, (x)
-/* Signed/SilcUInt32.
-
- Formatting: SILC_STR_SI_INT(int)
- SILC_STR_UI_INT(SilcUInt32)
- Unformatting: SILC_STR_SI_INT(int *)
- SILC_STR_UI_INT(SilcUInt32 *)
-
-*/
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_*_INT
+ *
+ * NAME
+ *
+ * #define SILC_STR_UI_INT() ...
+ * #define SILC_STR_SI_INT() ...
+ *
+ * DESCRIPTION
+ *
+ * Signed/SilcUInt32.
+ *
+ * Formatting: SILC_STR_SI_INT(int)
+ * SILC_STR_UI_INT(SilcUInt32)
+ * Unformatting: SILC_STR_SI_INT(int *)
+ * SILC_STR_UI_INT(SilcUInt32 *)
+ *
+ ***/
#define SILC_STR_SI_INT(x) SILC_BUFFER_PARAM_SI32_INT, (x)
#define SILC_STR_UI_INT(x) SILC_BUFFER_PARAM_UI32_INT, (x)
-/* Signed/SilcUInt64.
-
- Formatting: SILC_STR_SI_INT64(int)
- SILC_STR_UI_INT64(SilcUInt32)
- Unformatting: SILC_STR_SI_INT64(int *)
- SILC_STR_UI_INT64(SilcUInt32 *)
-
-*/
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_*_INT64
+ *
+ * NAME
+ *
+ * #define SILC_STR_UI_INT64() ...
+ * #define SILC_STR_SI_INT64() ...
+ *
+ * DESCRIPTION
+ *
+ * Signed/SilcUInt64.
+ *
+ * Formatting: SILC_STR_SI_INT64(int)
+ * SILC_STR_UI_INT64(SilcUInt32)
+ * Unformatting: SILC_STR_SI_INT64(int *)
+ * SILC_STR_UI_INT64(SilcUInt32 *)
+ *
+ ***/
#define SILC_STR_SI_INT64(x) SILC_BUFFER_PARAM_SI64_INT, (x)
#define SILC_STR_UI_INT64(x) SILC_BUFFER_PARAM_UI64_INT, (x)
-/* Unsigned NULL terminated string. Note that the string must be
- NULL terminated because strlen() will be used to get the length of
- the string.
-
- Formatting: SILC_STR_UI32_STRING(unsigned char *)
- Unformatting: SILC_STR_UI32_STRING(unsigned char **)
-
- Unformatting procedure will check for length of the string from the
- buffer before trying to get the string out. Thus, one *must* format the
- length as UI_INT or UI_SHORT into the buffer *before* formatting the
- actual string to the buffer, and, in unformatting one must ignore the
- length of the string because unformatting procedure will take it
- automatically.
-
- Example:
-
- Formatting: ..., SILC_STR_UI_INT(strlen(string)),
- SILC_STR_UI32_STRING(string), ...
- Unformatting: ..., SILC_STR_UI32_STRING(&string), ...
-
- I.e., you ignore the formatted length field in unformatting. If you don't
- the unformatting procedure might fail and it definitely does not unformat
- the data reliably.
-
- _ALLOC routines automatically allocates memory for the variable sent
- as argument in unformatting.
-
-*/
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_*_STRING
+ *
+ * NAME
+ *
+ * #define SILC_STR_UI8_STRING() ...
+ * #define SILC_STR_UI8_STRING_ALLOC() ...
+ * #define SILC_STR_UI16_STRING() ...
+ * #define SILC_STR_UI16_STRING_ALLOC() ...
+ * #define SILC_STR_UI32_STRING() ...
+ * #define SILC_STR_UI32_STRING_ALLOC() ...
+ *
+ * DESCRIPTION
+ *
+ * Unsigned NULL terminated string. Note that the string must be
+ * NULL terminated because strlen() will be used to get the length of
+ * the string.
+ *
+ * Formatting: SILC_STR_UI32_STRING(unsigned char *)
+ * Unformatting: SILC_STR_UI32_STRING(unsigned char **)
+ *
+ * Unformatting procedure will check for length of the string from the
+ * buffer before trying to get the string out. Thus, one *must* format the
+ * length as UI_INT or UI_SHORT into the buffer *before* formatting the
+ * actual string to the buffer, and, in unformatting one must ignore the
+ * length of the string because unformatting procedure will take it
+ * automatically.
+ *
+ * Example:
+ *
+ * Formatting: ..., SILC_STR_UI_INT(strlen(string)),
+ * SILC_STR_UI32_STRING(string), ...
+ * Unformatting: ..., SILC_STR_UI32_STRING(&string), ...
+ *
+ * I.e., you can ignore the formatted length field in unformatting.
+ *
+ * UI8, UI16 and UI32 means that the length is considered to be
+ * either char (8 bits), short (16 bits) or int (32 bits) in
+ * unformatting.
+ *
+ * _ALLOC routines automatically allocates memory for the variable sent
+ * as argument in unformatting.
+ *
+ ***/
#define SILC_STR_UI8_STRING(x) SILC_BUFFER_PARAM_UI8_STRING, (x)
#define SILC_STR_UI8_STRING_ALLOC(x) SILC_BUFFER_PARAM_UI8_STRING_ALLOC, (x)
#define SILC_STR_UI16_STRING(x) SILC_BUFFER_PARAM_UI16_STRING, (x)
#define SILC_STR_UI32_STRING(x) SILC_BUFFER_PARAM_UI32_STRING, (x)
#define SILC_STR_UI32_STRING_ALLOC(x) SILC_BUFFER_PARAM_UI32_STRING_ALLOC, (x)
-/* Unsigned string. Second argument is the length of the string.
-
- Formatting: SILC_STR_UI32_NSTRING(unsigned char *, SilcUInt32)
- Unformatting: SILC_STR_UI32_NSTRING(unsigned char **, SilcUInt32 *)
-
- Unformatting procedure will check for length of the string from the
- buffer before trying to get the string out. Thus, one *must* format the
- length as UI_INT or UI_SHORT into the buffer *before* formatting the
- actual string to the buffer, and, in unformatting one must ignore the
- length of the string because unformatting procedure will take it
- automatically.
-
- Example:
-
- Formatting: ..., SILC_STR_UI_INT(strlen(string)),
- SILC_STR_UI32_NSTRING(string, strlen(string)), ...
- Unformatting: ..., SILC_STR_UI32_NSTRING(&string, &len), ...
-
- I.e., you ignore the formatted length field in unformatting. If you don't
- the unformatting procedure might fail and it definitely does not unformat
- the data reliably. The length taken from the buffer is returned to the
- pointer sent as argument (&len in above example).
-
- UI/SI16 and UI/SI32 means that the length is considered to be either
- short (16 bits) or int (32 bits) in unformatting.
-
- _ALLOC routines automatically allocates memory for the variable sent
- as argument in unformatting.
-
-*/
-#define SILC_STR_UI8_NSTRING(x, l) SILC_BUFFER_PARAM_UI8_NSTRING, (x), (l)
-#define SILC_STR_UI8_NSTRING_ALLOC(x, l) \
- SILC_BUFFER_PARAM_UI8_NSTRING_ALLOC, (x), (l)
-#define SILC_STR_UI16_NSTRING(x, l) SILC_BUFFER_PARAM_UI16_NSTRING, (x), (l)
-#define SILC_STR_UI16_NSTRING_ALLOC(x, l) \
- SILC_BUFFER_PARAM_UI16_NSTRING_ALLOC, (x), (l)
-#define SILC_STR_UI32_NSTRING(x, l) SILC_BUFFER_PARAM_UI32_NSTRING, (x), (l)
-#define SILC_STR_UI32_NSTRING_ALLOC(x, l) \
- SILC_BUFFER_PARAM_UI32_NSTRING_ALLOC, (x), (l)
-
-/* Extended Unsigned string formatting. Second argument is the length of
- the string.
-
- Formatting: This is equal to using *_NSTRING
- Unformatting: SILC_STR_UI_XNSTRING(unsigned char **, SilcUInt32)
-
- This type can be used to take arbitrary length string from the buffer
- by sending the requested amount of bytes as argument. This differs
- from *_STRING and *_NSTRING so that this doesn't try to find the
- length of the data from the buffer but the length of the data is
- sent as argument. This a handy way to unformat fixed length strings
- from the buffer without having the length of the string formatted
- in the buffer.
-
- _ALLOC routines automatically allocates memory for the variable sent
- as argument in unformatting.
-
-*/
-#define SILC_STR_UI_XNSTRING(x, l) SILC_BUFFER_PARAM_UI_XNSTRING, (x), (l)
-#define SILC_STR_UI_XNSTRING_ALLOC(x, l) \
- SILC_BUFFER_PARAM_UI_XNSTRING_ALLOC, (x), (l)
-
-/* Marks end of the argument list. This must be at the end of the
- argument list or error will occur. */
-#define SILC_STR_END SILC_BUFFER_PARAM_END
-
-/* Prototypes */
-
-/****f* silcutil/SilcBufferFormatAPI/silc_buffer_format
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_*_NSTRING
*
- * SYNOPSIS
+ * NAME
*
- * int silc_buffer_format(SilcBuffer dst, ...);
+ * #define SILC_STR_UI8_NSTRING() ...
+ * #define SILC_STR_UI8_NSTRING_ALLOC() ...
+ * #define SILC_STR_UI16_NSTRING() ...
+ * #define SILC_STR_UI16_NSTRING_ALLOC() ...
+ * #define SILC_STR_UI32_NSTRING() ...
+ * #define SILC_STR_UI32_NSTRING_ALLOC() ...
*
* DESCRIPTION
*
- * Formats a buffer from a variable argument list. Returns -1 on error
- * and the length of the formatted buffer otherwise.
+ * Unsigned string. Second argument is the length of the string.
*
- ***/
-int silc_buffer_format(SilcBuffer dst, ...);
-
-/****f* silcutil/SilcBufferFormatAPI/silc_buffer_unformat
+ * Formatting: SILC_STR_UI32_NSTRING(unsigned char *, SilcUInt32)
+ * Unformatting: SILC_STR_UI32_NSTRING(unsigned char **, SilcUInt32 *)
*
- * SYNOPSIS
+ * Unformatting procedure will check for length of the string from the
+ * buffer before trying to get the string out. Thus, one *must* format the
+ * length as UI_INT or UI_SHORT into the buffer *before* formatting the
+ * actual string to the buffer, and, in unformatting one must ignore the
+ * length of the string because unformatting procedure will take it
+ * automatically.
*
- * int silc_buffer_unformat(SilcBuffer src, ...);
+ * Example:
*
- * DESCRIPTION
+ * Formatting: ..., SILC_STR_UI_INT(strlen(string)),
+ * SILC_STR_UI32_NSTRING(string, strlen(string)), ...
+ * Unformatting: ..., SILC_STR_UI32_NSTRING(&string, &len), ...
*
- * Unformats a buffer from a variable argument list. Returns -1 on error
- * and the length of the unformatted buffer otherwise.
+ * I.e., you can ignore the formatted length field in unformatting. The
+ * length taken from the buffer is returned to the pointer sent as
+ * argument (&len in above example).
+ *
+ * UI8, UI16 and UI32 means that the length is considered to be
+ * either char (8 bits), short (16 bits) or int (32 bits) in
+ * unformatting.
+ *
+ * _ALLOC routines automatically allocates memory for the variable sent
+ * as argument in unformatting.
*
***/
-int silc_buffer_unformat(SilcBuffer src, ...);
+#define SILC_STR_UI8_NSTRING(x, l) SILC_BUFFER_PARAM_UI8_NSTRING, (x), (l)
+#define SILC_STR_UI8_NSTRING_ALLOC(x, l) \
+ SILC_BUFFER_PARAM_UI8_NSTRING_ALLOC, (x), (l)
+#define SILC_STR_UI16_NSTRING(x, l) SILC_BUFFER_PARAM_UI16_NSTRING, (x), (l)
+#define SILC_STR_UI16_NSTRING_ALLOC(x, l) \
+ SILC_BUFFER_PARAM_UI16_NSTRING_ALLOC, (x), (l)
+#define SILC_STR_UI32_NSTRING(x, l) SILC_BUFFER_PARAM_UI32_NSTRING, (x), (l)
+#define SILC_STR_UI32_NSTRING_ALLOC(x, l) \
+ SILC_BUFFER_PARAM_UI32_NSTRING_ALLOC, (x), (l)
-/****f* silcutil/SilcBufferFormatAPI/silc_buffer_format_vp
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_UI_XNSTRING
*
- * SYNOPSIS
+ * NAME
*
- * int silc_buffer_format_vp(SilcBuffer dst, va_list vp);
+ * #define SILC_STR_UI_XNSTRING() ...
+ * #define SILC_STR_UI_XNSTRING_ALLOC() ...
*
* DESCRIPTION
*
- * Formats a buffer from a variable argument list indicated by the `ap'.
- * Returns -1 on error and the length of the formatted buffer otherwise.
+ * Extended Unsigned string formatting. Second argument is the length of
+ * the string.
*
- ***/
-int silc_buffer_format_vp(SilcBuffer dst, va_list ap);
-
-/****f* silcutil/SilcBufferFormatAPI/silc_buffer_unformat_vp
+ * Formatting: SILC_STR_UI_XNSTRING(unsigned char *, SilcUInt32)
+ * Unformatting: SILC_STR_UI_XNSTRING(unsigned char **, SilcUInt32)
*
- * SYNOPSIS
- *
- * int silc_buffer_unformat_vp(SilcBuffer src, va_list vp);
+ * This type can be used to take arbitrary length string from the buffer
+ * by sending the requested amount of bytes as argument. This differs
+ * from *_STRING and *_NSTRING so that this doesn't try to find the
+ * length of the data from the buffer but the length of the data is
+ * sent as argument. This a handy way to unformat fixed length strings
+ * from the buffer without having the length of the string formatted
+ * in the buffer.
*
- * DESCRIPTION
- *
- * Unformats a buffer from a variable argument list indicated by the `ap'.
- * Returns -1 on error and the length of the unformatted buffer otherwise.
+ * _ALLOC routines automatically allocates memory for the variable sent
+ * as argument in unformatting.
*
***/
-int silc_buffer_unformat_vp(SilcBuffer src, va_list ap);
+#define SILC_STR_UI_XNSTRING(x, l) SILC_BUFFER_PARAM_UI_XNSTRING, (x), (l)
+#define SILC_STR_UI_XNSTRING_ALLOC(x, l) \
+ SILC_BUFFER_PARAM_UI_XNSTRING_ALLOC, (x), (l)
-/****f* silcutil/SilcBufferFormatAPI/silc_buffer_strformat
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_END
*
- * SYNOPSIS
+ * NAME
*
- * int silc_buffer_strformat(SilcBuffer dst, ...);
+ * #define SILC_STR_END ...
*
* DESCRIPTION
*
- * Formats a buffer from variable argument list of strings. Each
- * string must be NULL-terminated and the variable argument list must
- * be end with SILC_STR_END argument. This allows that a string in
- * the list can be NULL, in which case it is skipped. This automatically
- * allocates the space for the buffer data but `dst' must be already
- * allocated by the caller.
+ * Marks end of the argument list. This must be at the end of the
+ * argument list or error will occur.
*
***/
-int silc_buffer_strformat(SilcBuffer dst, ...);
+#define SILC_STR_END SILC_BUFFER_PARAM_END
#endif /* !SILCBUFFMT_H */
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