Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 1997 - 2006 Pekka Riikonen
+ Copyright (C) 1997 - 2007 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
*
* 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 functions for formatting different data
+ * types into a buffer and retrieving different data types from a buffer
+ * into specified data types. It is especially useful to encode packets,
+ * protocol payloads and such.
+ *
+ * As the SilcBuffer API is not thread-safe these routines may not be used
+ * in multithreaded environment with a same SilcBuffer context without
+ * concurrency control.
+ *
+ * EXAMPLE
+ *
+ * SilcBufferStruct buffer;
+ *
+ * memset(&buffer, 0, sizeof(buffer));
+ * ret = silc_buffer_format(&buffer,
+ * SILC_STR_UINT32(intval),
+ * SILC_STR_UINT8(charval),
+ * SILC_STR_UINT64(longintval),
+ * SILC_STR_UINT16(str_len),
+ * SILC_STR_DATA(str, str_len),
+ * SILC_STR_END);
+ * if (ret < 0)
+ * error;
*
***/
#ifndef SILCBUFFMT_H
#define SILCBUFFMT_H
+/****f* silcutil/SilcBufferFormatAPI/SilcBufferFormatFunc
+ *
+ * SYNOPSIS
+ *
+ * typedef int (*SilcBuffeSFormatFunc)(SilcStack stack,
+ * SilcBuffer buffer,
+ * void *value,
+ * void *context);
+ *
+ * DESCRIPTION
+ *
+ * Formatting function callback given with SILC_STR_FUNC type. The
+ * `buffer' is the buffer being formatted at the location where the
+ * SILC_STR_FUNC was placed in formatting. The function should call
+ * silc_buffer_senlarge before it adds the data to the buffer to make
+ * sure that it has enough space. The buffer->head points to the
+ * start of the buffer and silc_buffer_headlen() gives the length
+ * of the currently formatted data area. It is also possible to use
+ * silc_buffer_sformat with `buffer' which will enlarge the buffer if
+ * needed.
+ *
+ * The `value' is the value given to SILC_STR_FUNC that is to be formatted
+ * into the buffer. It may be NULL if the function is not formatting
+ * new data into the buffer. The `context' is caller specific context.
+ * Returns -1 on error and length of the formatted value otherwise, and
+ * 0 if nothing was formatted.
+ *
+ ***/
+typedef int (*SilcBufferFormatFunc)(SilcStack stack, SilcBuffer buffer,
+ void *value, void *context);
+
+/****f* silcutil/SilcBufferFormatAPI/SilcBufferUnformatFunc
+ *
+ * SYNOPSIS
+ *
+ * typedef int (*SilcBufferUnformatFunc)(SilcBuffer buffer,
+ * void **value,
+ * void *context);
+ *
+ * DESCRIPTION
+ *
+ * Unformatting function callback given with SILC_STR_FUNC type. The
+ * `buffer' is the buffer being unformatted and is at the location where
+ * the SILC_STR_FUNC was placed in unformatting. The function should
+ * check there is enough data in the `buffer' before trying to decode
+ * from it.
+ *
+ * If this function unformats anything from the buffer its value is to
+ * be returned to the `value' pointer. The implementation should itself
+ * decide whether the unformatted value is allocated or not. If this
+ * function does not unformat anything, nothing is returned to `value'
+ *
+ * The `context' is caller specific context. Returns -1 on error, and
+ * length of the unformatted value otherwise, and 0 if nothing was
+ * unformatted.
+ *
+ ***/
+typedef int (*SilcBufferUnformatFunc)(SilcStack stack, SilcBuffer buffer,
+ void **value, void *context);
+
/* Prototypes */
/****f* silcutil/SilcBufferFormatAPI/silc_buffer_format
*
* DESCRIPTION
*
- * Formats a buffer from a variable argument list. Returns -1 on error
- * and the length of the formatted buffer otherwise. The buffer is
- * enlarged automatically during formatting, if it doesn't already have
- * enough space.
+ * Formats a buffer from a variable argument list. Returns -1 if the
+ * system is out of memory and the length of the formatted buffer otherwise.
+ * The buffer is enlarged automatically during formatting, if it doesn't
+ * already have enough space.
*
* EXAMPLE
*
+ * Three basic ways of using silc_buffer_format:
+ *
+ * // Statically allocated zero size buffer
* SilcBufferStruct buffer;
- * SilcBuffer buf;
*
* memset(&buffer, 0, sizeof(buffer));
* 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_UINT32(intval),
+ * SILC_STR_UINT8(charval),
+ * SILC_STR_UINT32(intval),
+ * SILC_STR_UINT16(str_len),
+ * SILC_STR_DATA(str, str_len),
* SILC_STR_END);
* if (ret < 0)
* error;
* // Free the allocated data
* silc_buffer_purge(&buffer);
*
- * // Allocate zero size buffer
+ * // Dynamically allocated zero size buffer
+ * SilcBuffer buf;
* buf = silc_buffer_alloc(0);
* ret = silc_buffer_format(buf,
- * SILC_STR_INT(intval),
- * SILC_STR_CHAR(charval),
+ * SILC_STR_UINT32(intval),
+ * SILC_STR_UINT8(charval),
* SILC_STR_END);
+ * if (ret < 0)
+ * error;
*
* // Free the allocated buffer
* silc_buffer_free(buf);
*
+ * // Dynamically allocated buffer with enough space
+ * SilcBuffer buf;
+ * buf = silc_buffer_alloc(2 + str_len);
+ * ret = silc_buffer_format(buf,
+ * SILC_STR_UINT16(str_len),
+ * SILC_STR_DATA(str, str_len),
+ * SILC_STR_END);
+ * if (ret < 0)
+ * error;
+ *
***/
int silc_buffer_format(SilcBuffer dst, ...);
* DESCRIPTION
*
* Same as silc_buffer_format but uses `stack' to allocate the memory.
- * if `stack' is NULL reverts back to silc_buffer_format call.
+ * if `stack' is NULL reverts back to silc_buffer_format call. Returns
+ * -1 if system is out of memory.
+ *
+ * Note that this call consumes the `stack'. The caller should push the
+ * stack before calling the function and pop it later.
*
***/
int silc_buffer_sformat(SilcStack stack, SilcBuffer dst, ...);
* 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.
+ * Returns -1 if system is out of memory and the length of the formatted
+ * buffer otherwise.
*
***/
int silc_buffer_format_vp(SilcBuffer dst, va_list ap);
-/****f* silcutil/SilcBufferFormatAPI/silc_buffer_format_vp
+/****f* silcutil/SilcBufferFormatAPI/silc_buffer_sformat_vp
*
* SYNOPSIS
*
- * int silc_buffer_format_vp(SilcBuffer dst, va_list vp);
+ * int silc_buffer_sformat_vp(SilcStack stack, SilcBuffer dst, va_list vp);
*
* DESCRIPTION
*
* Same as silc_buffer_format_vp but uses `stack' to allocate the memory.
- * if `stack' is NULL reverts back to silc_buffer_format_vp call.
+ * if `stack' is NULL reverts back to silc_buffer_format_vp call. Returns
+ * -1 if system is out of memory.
+ *
+ * Note that this call consumes the `stack'. The caller should push the
+ * stack before calling the function and pop it later.
*
***/
int silc_buffer_sformat_vp(SilcStack stack, SilcBuffer dst, va_list ap);
* EXAMPLE
*
* ret = silc_buffer_unformat(buffer,
- * SILC_STR_INT(&intval),
- * SILC_STR_CHAR(&charval),
+ * SILC_STR_UINT32(&intval),
+ * SILC_STR_UINT8(&charval),
* SILC_STR_OFFSET(4),
* SILC_STR_UI16_NSTRING_ALLOC(&str, &str_len),
* SILC_STR_END);
***/
int silc_buffer_unformat(SilcBuffer src, ...);
+/****f* silcutil/SilcBufferFormatAPI/silc_buffer_sunformat
+ *
+ * SYNOPSIS
+ *
+ * int silc_buffer_sunformat(SilcStack stack, SilcBuffer src, ...);
+ *
+ * DESCRIPTION
+ *
+ * Same as silc_buffer_unformat but uses `stack' to allocate the memory.
+ * if `stack' is NULL reverts back to silc_buffer_format call.
+ *
+ * Note that this call consumes the `stack'. The caller should push the
+ * stack before calling the function and pop it later.
+ *
+ ***/
+int silc_buffer_sunformat(SilcStack stack, SilcBuffer src, ...);
+
/****f* silcutil/SilcBufferFormatAPI/silc_buffer_unformat_vp
*
* SYNOPSIS
***/
int silc_buffer_unformat_vp(SilcBuffer src, va_list ap);
+/****f* silcutil/SilcBufferFormatAPI/silc_buffer_sunformat_vp
+ *
+ * SYNOPSIS
+ *
+ * int silc_buffer_sunformat_vp(SilcBuffer src, va_list vp);
+ *
+ * DESCRIPTION
+ *
+ * Same as silc_buffer_unformat_vp but uses `stack' to allocate the
+ * memory. if `stack' is NULL reverts back to silc_buffer_format_vp call.
+ *
+ * Note that this call consumes the `stack'. The caller should push the
+ * stack before calling the function and pop it later.
+ *
+ ***/
+int silc_buffer_sunformat_vp(SilcStack stack, SilcBuffer src, va_list ap);
+
/****f* silcutil/SilcBufferFormatAPI/silc_buffer_strformat
*
* SYNOPSIS
*
- * int silc_buffer_strformat(SilcBuffer dst, ...);
+ * 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.
+ * 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_STRFMT_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. Returns -1 if system is out of memory.
*
* EXAMPLE
*
*
* SYNOPSIS
*
- * int silc_buffer_strformat(SilcStack stack, SilcBuffer dst, ...);
+ * int silc_buffer_strformat(SilcStack stack, 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. This function is equivalent to
- * silc_buffer_strformat but allocates memory from `stack'.
+ * 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_STRFMT_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. This function is equivalent to
+ * silc_buffer_strformat but allocates memory from `stack'. Returns -1
+ * if system is out of memory.
+ *
+ * Note that this call consumes the `stack'. The caller should push the
+ * stack before calling the function and pop it later.
*
***/
int silc_buffer_sstrformat(SilcStack stack, SilcBuffer dst, ...);
-/* Macros for expanding parameters into variable function argument list.
- These are passed to silc_buffer_format and silc_buffer_unformat
- functions. */
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_SINT8
+ *
+ * NAME
+ *
+ * #define SILC_STR_SINT8() ...
+ *
+ * DESCRIPTION
+ *
+ * One 8-bit signed integer.
+ *
+ * Formatting: SILC_STR_SINT8(SilcInt8)
+ * Unformatting: SILC_STR_SINT8(SilcInt8 *)
+ *
+ ***/
+#define SILC_STR_SINT8(x) SILC_PARAM_SINT8, (x)
+
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_UINT8
+ *
+ * NAME
+ *
+ * #define SILC_STR_UINT8() ...
+ *
+ * DESCRIPTION
+ *
+ * One 8-bit unsigned integer.
+ *
+ * Formatting: SILC_STR_UINT8(SilcUInt8)
+ * Unformatting: SILC_STR_UINT8(SilcUInt8 *)
+ *
+ ***/
+#define SILC_STR_UINT8(x) SILC_PARAM_UINT8, (x)
-/* Buffer parameter types.
+/* Deprecated */
+#define SILC_STR_SI_CHAR(x) SILC_PARAM_SINT8, (x)
+#define SILC_STR_UI_CHAR(x) SILC_PARAM_UINT8, (x)
- _SI_ = signed
- _UI_ = unsigned
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_SINT16
+ *
+ * NAME
+ *
+ * #define SILC_STR_SINT16() ...
+ *
+ * DESCRIPTION
+ *
+ * SilcInt16.
+ *
+ * Formatting: SILC_STR_SINT16(SilcInt16)
+ * Unformatting: SILC_STR_SINT16(SilcInt16 *)
+ *
+ ***/
+#define SILC_STR_SINT16(x) SILC_PARAM_SINT16, (x)
- Any XXX_STRING_ALLOC types will allocate space for the data and
- memcpy the data to the pointer sent as argument (in unformatting).
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_UINT16
+ *
+ * NAME
+ *
+ * #define SILC_STR_UINT16() ...
+ *
+ * DESCRIPTION
+ *
+ * SilcUInt16.
+ *
+ * Formatting: SILC_STR_UINT16(SilcUInt16)
+ * Unformatting: SILC_STR_UINT16(SilcUInt16 *)
+ *
+ ***/
+#define SILC_STR_UINT16(x) SILC_PARAM_UINT16, (x)
- Any XXX_STRING will not allocate or copy any data. Instead it
- will set the pointer to the data. Note that the data pointer
- returned (in unformatting) must not be freed.
+/* Deprecated */
+#define SILC_STR_SI_SHORT(x) SILC_PARAM_SINT16, (x)
+#define SILC_STR_UI_SHORT(x) SILC_PARAM_UINT16, (x)
-*/
-typedef enum {
- SILC_BUFFER_PARAM_SI8_CHAR,
- SILC_BUFFER_PARAM_UI8_CHAR,
-
- SILC_BUFFER_PARAM_SI16_SHORT,
- SILC_BUFFER_PARAM_UI16_SHORT,
-
- SILC_BUFFER_PARAM_SI32_INT,
- SILC_BUFFER_PARAM_UI32_INT,
-
- SILC_BUFFER_PARAM_SI64_INT,
- SILC_BUFFER_PARAM_UI64_INT,
-
- SILC_BUFFER_PARAM_UI8_STRING, /* No copy */
- SILC_BUFFER_PARAM_UI8_STRING_ALLOC, /* Alloc + memcpy */
- SILC_BUFFER_PARAM_UI16_STRING, /* No copy */
- SILC_BUFFER_PARAM_UI16_STRING_ALLOC, /* Alloc + memcpy */
- SILC_BUFFER_PARAM_UI32_STRING, /* No copy */
- SILC_BUFFER_PARAM_UI32_STRING_ALLOC, /* Alloc + memcpy */
- SILC_BUFFER_PARAM_UI8_NSTRING, /* No copy */
- SILC_BUFFER_PARAM_UI8_NSTRING_ALLOC, /* Alloc + memcpy */
- SILC_BUFFER_PARAM_UI16_NSTRING, /* No copy */
- SILC_BUFFER_PARAM_UI16_NSTRING_ALLOC, /* Alloc + memcpy */
- SILC_BUFFER_PARAM_UI32_NSTRING, /* No copy */
- SILC_BUFFER_PARAM_UI32_NSTRING_ALLOC, /* Alloc + memcpy */
- SILC_BUFFER_PARAM_UI_XNSTRING, /* No copy */
- SILC_BUFFER_PARAM_UI_XNSTRING_ALLOC, /* Alloc + memcpy */
- SILC_BUFFER_PARAM_DATA, /* No copy */
- SILC_BUFFER_PARAM_DATA_ALLOC, /* Alloc + memcpy */
-
- SILC_BUFFER_PARAM_OFFSET,
- SILC_BUFFER_PARAM_ADVANCE,
-
- SILC_BUFFER_PARAM_END
-} SilcBufferParamType;
-
-/****d* silcutil/SilcBufferFormatAPI/SILC_STR_*_CHAR
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_SINT32
*
* NAME
*
- * #define SILC_STR_UI_CHAR() ...
- * #define SILC_STR_SI_CHAR() ...
+ * #define SILC_STR_SINT32() ...
*
* DESCRIPTION
*
- * One signed/unsigned character.
+ * SilcInt32.
*
- * Formatting: SILC_STR_SI_CHAR(char)
- * SILC_STR_UI_CHAR(unsigned char)
- * Unformatting: SILC_STR_SI_CHAR(char *)
- * SILC_STR_UI_CHAR(unsigned char *)
+ * Formatting: SILC_STR_SINT32(SilcInt32)
+ * Unformatting: SILC_STR_SINT32(SilcInt32 *)
*
***/
-#define SILC_STR_SI_CHAR(x) SILC_BUFFER_PARAM_SI8_CHAR, (x)
-#define SILC_STR_UI_CHAR(x) SILC_BUFFER_PARAM_UI8_CHAR, (x)
+#define SILC_STR_SINT32(x) SILC_PARAM_SINT32, (x)
-/****d* silcutil/SilcBufferFormatAPI/SILC_STR_*_SHORT
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_UINT32
*
* NAME
*
- * #define SILC_STR_UI_SHORT() ...
- * #define SILC_STR_SI_SHORT() ...
+ * #define SILC_STR_UINT32() ...
*
* DESCRIPTION
*
- * Signed/SilcUInt16.
+ * SilcUInt32.
*
- * Formatting: SILC_STR_SI_SHORT(short)
- * SILC_STR_UI_SHORT(SilcUInt16)
- * Unformatting: SILC_STR_SI_SHORT(short *)
- * SILC_STR_UI_SHORT(SilcUInt16 *)
+ * Formatting: SILC_STR_UINT32(SilcUInt32)
+ * Unformatting: SILC_STR_UINT32(SilcUInt32 *)
*
***/
-#define SILC_STR_SI_SHORT(x) SILC_BUFFER_PARAM_SI16_SHORT, (x)
-#define SILC_STR_UI_SHORT(x) SILC_BUFFER_PARAM_UI16_SHORT, (x)
+#define SILC_STR_UINT32(x) SILC_PARAM_UINT32, (x)
+
+/* Deprecated */
+#define SILC_STR_SI_INT(x) SILC_PARAM_SINT32, (x)
+#define SILC_STR_UI_INT(x) SILC_PARAM_UINT32, (x)
-/****d* silcutil/SilcBufferFormatAPI/SILC_STR_*_INT
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_SINT64
*
* NAME
*
- * #define SILC_STR_UI_INT() ...
- * #define SILC_STR_SI_INT() ...
+ * #define SILC_STR_SINT64() ...
*
* DESCRIPTION
*
- * Signed/SilcUInt32.
+ * SilcInt64.
*
- * Formatting: SILC_STR_SI_INT(int)
- * SILC_STR_UI_INT(SilcUInt32)
- * Unformatting: SILC_STR_SI_INT(int *)
- * SILC_STR_UI_INT(SilcUInt32 *)
+ * Formatting: SILC_STR_SINT64(SilcInt64)
+ * Unformatting: SILC_STR_SINT64(SilcInt64 *)
*
***/
-#define SILC_STR_SI_INT(x) SILC_BUFFER_PARAM_SI32_INT, (x)
-#define SILC_STR_UI_INT(x) SILC_BUFFER_PARAM_UI32_INT, (x)
+#define SILC_STR_SI_INT64(x) SILC_PARAM_SINT64, (x)
-/****d* silcutil/SilcBufferFormatAPI/SILC_STR_*_INT64
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_UINT64
*
* NAME
*
- * #define SILC_STR_UI_INT64() ...
- * #define SILC_STR_SI_INT64() ...
+ * #define SILC_STR_UINT64() ...
*
* DESCRIPTION
*
- * Signed/SilcUInt64.
+ * SilcUInt64.
*
- * Formatting: SILC_STR_SI_INT64(int)
- * SILC_STR_UI_INT64(SilcUInt32)
- * Unformatting: SILC_STR_SI_INT64(int *)
- * SILC_STR_UI_INT64(SilcUInt32 *)
+ * Formatting: SILC_STR_UINT64(SilcUInt64)
+ * Unformatting: SILC_STR_UINT64(SilcUInt64 *)
*
***/
-#define SILC_STR_SI_INT64(x) SILC_BUFFER_PARAM_SI64_INT, (x)
-#define SILC_STR_UI_INT64(x) SILC_BUFFER_PARAM_UI64_INT, (x)
+#define SILC_STR_UI_INT64(x) SILC_PARAM_UINT64, (x)
+
+/* Deprecated */
+#define SILC_STR_SI_INT64(x) SILC_PARAM_SINT64, (x)
+#define SILC_STR_UI_INT64(x) SILC_PARAM_UINT64, (x)
/****d* silcutil/SilcBufferFormatAPI/SILC_STR_*_STRING
*
* 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_UI16_STRING_ALLOC(x) SILC_BUFFER_PARAM_UI16_STRING_ALLOC, (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)
+#define SILC_STR_UI8_STRING(x) SILC_PARAM_UI8_STRING, (x)
+#define SILC_STR_UI8_STRING_ALLOC(x) SILC_PARAM_UI8_STRING | SILC_PARAM_ALLOC, (x)
+#define SILC_STR_UI16_STRING(x) SILC_PARAM_UI16_STRING, (x)
+#define SILC_STR_UI16_STRING_ALLOC(x) SILC_PARAM_UI16_STRING | SILC_PARAM_ALLOC, (x)
+#define SILC_STR_UI32_STRING(x) SILC_PARAM_UI32_STRING, (x)
+#define SILC_STR_UI32_STRING_ALLOC(x) SILC_PARAM_UI32_STRING | SILC_PARAM_ALLOC, (x)
/****d* silcutil/SilcBufferFormatAPI/SILC_STR_*_NSTRING
*
* as argument in unformatting.
*
***/
-#define SILC_STR_UI8_NSTRING(x, l) SILC_BUFFER_PARAM_UI8_NSTRING, (x), (l)
+#define SILC_STR_UI8_NSTRING(x, l) SILC_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)
+ SILC_PARAM_UI8_NSTRING | SILC_PARAM_ALLOC, (x), (l)
+#define SILC_STR_UI16_NSTRING(x, l) SILC_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)
+ SILC_PARAM_UI16_NSTRING | SILC_PARAM_ALLOC, (x), (l)
+#define SILC_STR_UI32_NSTRING(x, l) SILC_PARAM_UI32_NSTRING, (x), (l)
#define SILC_STR_UI32_NSTRING_ALLOC(x, l) \
- SILC_BUFFER_PARAM_UI32_NSTRING_ALLOC, (x), (l)
+ SILC_PARAM_UI32_NSTRING | SILC_PARAM_ALLOC, (x), (l)
/****d* silcutil/SilcBufferFormatAPI/SILC_STR_DATA
*
*
* DESCRIPTION
*
- * Binary data formatting. Second argument is the lenght of the data.
+ * Binary data formatting. Second argument is the length of the data.
*
* Formatting: SILC_STR_DATA(unsigned char *, SilcUInt32)
* Unformatting: SILC_STR_DATA(unsigned char **, SilcUInt32)
* as argument in unformatting.
*
***/
-#define SILC_STR_DATA(x, l) SILC_BUFFER_PARAM_DATA, (x), (l)
-#define SILC_STR_DATA_ALLOC(x, l) \
- SILC_BUFFER_PARAM_DATA_ALLOC, (x), (l)
+#define SILC_STR_DATA(x, l) SILC_PARAM_UICHAR, (x), (l)
+#define SILC_STR_DATA_ALLOC(x, l) SILC_PARAM_UICHAR | SILC_PARAM_ALLOC, (x), (l)
/* Deprecated */
-#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)
+#define SILC_STR_UI_XNSTRING(x, l) SILC_PARAM_UICHAR, (x), (l)
+#define SILC_STR_UI_XNSTRING_ALLOC(x, l) SILC_PARAM_UICHAR | SILC_PARAM_ALLOC, (x), (l)
+
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_BUFFER
+ *
+ * NAME
+ *
+ * #define SILC_STR_BUFFER() ...
+ * #define SILC_STR_BUFFER_ALLOC() ...
+ *
+ * DESCRIPTION
+ *
+ * SilcBuffer formatting.
+ *
+ * Formatting: SILC_STR_BUFFER(SilcBuffer)
+ * Unformatting: SILC_STR_BUFFER(SilcBuffer)
+ *
+ * This type can be used to format and unformat SilcBuffer. Note that, the
+ * length of the buffer will be automatically encoded into the buffer as
+ * a 32-bit integer. In unformatting the SilcBuffer context must be
+ * pre-allocated.
+ *
+ * _ALLOC routines automatically allocates memory inside SilcBuffer in
+ * unformatting.
+ *
+ ***/
+#define SILC_STR_BUFFER(x) SILC_PARAM_BUFFER, (x)
+#define SILC_STR_BUFFER_ALLOC(x) SILC_PARAM_BUFFER | SILC_PARAM_ALLOC, (x)
+
+/****d* silcutil/SilcBufferFormatAPI/SILC_STR_FUNC
+ *
+ * NAME
+ *
+ * #define SILC_STR_FUNC() ...
+ *
+ * DESCRIPTION
+ *
+ * SilcBuffer formatting.
+ *
+ * Formatting: SILC_STR_FUNC(function, void *value, void *context)
+ * Unformatting: SILC_STR_FUNC(function, void **value, void *context)
+ *
+ * This type can be used to call the `function' of the type
+ * SilcBufferFormatFunc or SilcBufferUnformatFunc to encode or decode
+ * the `value'. In encoding the `value' will be passed to the `function'
+ * and can be encoded into the buffer. The buffer will be passed as
+ * well to the `function' at the location where SILC_STR_FUNC is placed
+ * in formatting. The `context' delivers caller specific context to
+ * the `function'
+ *
+ * In unformatting the `function' will decode the encoded type and
+ * return it to `value' pointer. The decoding function should decide
+ * itself whether to allocate or not the decoded value.
+ *
+ * The `function' does not have to encode anything and passing `value'
+ * as NULL is allowed. The `function' could for example modify the
+ * existing buffer.
+ *
+ * EXAMPLE
+ *
+ * // Encode payload, encrypt and compute MAC.
+ * silc_buffer_format(buf,
+ * SILC_STR_FUNC(foo_encode_id, id, ctx),
+ * SILC_STR_UINT16(len),
+ * SILC_STR_DATA(data, len),
+ * SILC_STR_FUNC(foo_buf_encrypt, NULL, key),
+ * SILC_STR_FUNC(foo_buf_hmac, NULL, hmac),
+ * SILC_STR_DATA(iv, iv_len);
+ * SILC_STR_END);
+ *
+ * // Check MAC, decrypt and decode payload
+ * silc_buffer_unformat(buf,
+ * SILC_STR_FUNC(foo_buf_hmac, NULL, hmac),
+ * SILC_STR_FUNC(foo_buf_decrypt, NULL, key),
+ * SILC_STR_FUNC(foo_decode_id, &id, ctx),
+ * SILC_STR_UINT16(&len),
+ * SILC_STR_END);
+ *
+ ***/
+#define SILC_STR_FUNC(func, val, context) SILC_PARAM_FUNC, \
+ func, (val), (context)
/****d* silcutil/SilcBufferFormatAPI/SILC_STR_OFFSET
*
* can be used in formatting and unformatting at the same time.
*
***/
-#define SILC_STR_OFFSET(x) SILC_BUFFER_PARAM_OFFSET, (x)
+#define SILC_STR_OFFSET(x) SILC_PARAM_OFFSET, (x)
/****d* silcutil/SilcBufferFormatAPI/SILC_STR_ADVANCE
*
*
* Advance the buffer to the end of the data after the formatting is
* done. In normal operation when the formatted data is written the
- * buffer is located at the start of the data. With SILC_STR_ADVANCE
- * the buffer will be located at the end of the data. This makes it
+ * buffer is positioned at the start of the data. With SILC_STR_ADVANCE
+ * the buffer will be positioned at the end of the data. This makes it
* easy to add new data immediately after the previously added data.
+ * The SILC_STR_ADVANCE may also be used in unformatting.
*
* EXAMPLE
*
* // Add read data to the buffer
* silc_buffer_format(buffer,
* SILC_STR_ADVANCE,
- * SILC_STR_UI_XNSTRING(buf, len),
+ * SILC_STR_DATA(buf, len),
* SILC_STR_END);
* } while (len > 0);
*
* // Move to beginning of buffer
- * silc_buffer_push(buffer, silc_buffer_truelen(buffer));
+ * silc_buffer_start(buffer);
*
***/
-#define SILC_STR_ADVANCE SILC_BUFFER_PARAM_ADVANCE
+#define SILC_STR_ADVANCE SILC_PARAM_ADVANCE
/****d* silcutil/SilcBufferFormatAPI/SILC_STR_END
*
* argument list or error will occur.
*
***/
-#define SILC_STR_END SILC_BUFFER_PARAM_END
+#define SILC_STR_END SILC_PARAM_END
/****d* silcutil/SilcBufferFormatAPI/SILC_STRFMT_END
*
projects / silc.git / blobdiff