114 lines
3.4 KiB
C
114 lines
3.4 KiB
C
// Copyright 2011 Juri Glass, Mathias Runge, Nadim El Sayed
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// DAI-Labor, TU-Berlin
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//
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// This file is part of libSML.
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//
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// libSML is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// libSML is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with libSML. If not, see <http://www.gnu.org/licenses/>.
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#ifndef _SML_SHARED_H
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#define _SML_SHARED_H
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#include <stdlib.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef uint8_t u8;
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typedef uint16_t u16;
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typedef uint32_t u32;
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typedef uint64_t u64;
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typedef int8_t i8;
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typedef int16_t i16;
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typedef int32_t i32;
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typedef int64_t i64;
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#define SML_ANOTHER_TL 0x80
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#define SML_TYPE_FIELD 0x70
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#define SML_LENGTH_FIELD 0xF
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#define SML_OPTIONAL_SKIPPED 0x1
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#define SML_MESSAGE_END 0x0
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#define SML_TYPE_OCTET_STRING 0
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#define SML_TYPE_LIST 112
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#define SML_TYPE_BOOLEAN 64
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#define SML_TYPE_INTEGER 80
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#define SML_TYPE_UNSIGNED 96
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#define SML_TYPE_NUMBER_8 sizeof(u8)
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#define SML_TYPE_NUMBER_16 sizeof(u16)
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#define SML_TYPE_NUMBER_32 sizeof(u32)
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#define SML_TYPE_NUMBER_64 sizeof(u64)
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// This sml_buffer is used in two different use-cases.
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//
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// Parsing: the raw data is in the buffer field,
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// the buffer_len is the number of raw bytes received,
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// the cursor points to the current position during parsing
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//
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// Writing: At the beginning the buffer field is malloced and zeroed with
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// a default length, this default length is stored in buffer_len
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// (i.e. the maximum bytes one can write to this buffer)
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// cursor points to the position, where on can write during the
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// writing process. If a file is completely written to the buffer,
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// cursor is the number of bytes written to the buffer.
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typedef struct {
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unsigned char *buffer;
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size_t buffer_len;
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int cursor;
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int error;
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char *error_msg;
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} sml_buffer;
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sml_buffer *sml_buffer_init(size_t length);
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void sml_buffer_free(sml_buffer *buf);
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// Returns the length of the following data structure. Sets the cursor position to
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// the value field.
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int sml_buf_get_next_length(sml_buffer *buf);
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void sml_buf_set_type_and_length(sml_buffer *buf, unsigned int type, unsigned int l);
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// Checks if a error is occured.
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int sml_buf_has_errors(sml_buffer *buf);
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// Returns the type field of the current byte.
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int sml_buf_get_next_type(sml_buffer *buf);
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// Returns the current byte.
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unsigned char sml_buf_get_current_byte(sml_buffer *buf);
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// Returns a pointer to the current buffer position.
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unsigned char *sml_buf_get_current_buf(sml_buffer *buf);
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void sml_buf_optional_write(sml_buffer *buf);
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// Sets the number of bytes read (moves the cursor forward)
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void mc_sml_buf_update_read_bytes(sml_buffer *buf, int bytes);
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// Checks if the next field is a skipped optional field, updates the buffer accordingly
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int mc_sml_is_optional_skipped(sml_buffer *buf);
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#define SML_SKIP_OPTIONAL (mc_sml_is_optional_skipped(buf)) ? 0 :
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void hexdump(unsigned char *buffer, size_t buffer_len);
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#ifdef __cplusplus
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}
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#endif
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#endif
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