| /* |
| * Copyright (c) 2005 Lev Walkin <vlm@lionet.info>. All rights reserved. |
| * Redistribution and modifications are permitted subject to BSD license. |
| */ |
| #ifndef _PER_SUPPORT_H_ |
| #define _PER_SUPPORT_H_ |
| |
| #include <asn_system.h> /* Platform-specific types */ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* |
| * This structure describes a position inside a PER bit stream. |
| */ |
| typedef struct asn_per_data_s { |
| uint8_t *buffer; /* Pointer to the octet stream */ |
| size_t nboff; /* Bit offset to the meaningful bit */ |
| size_t nbits; /* Number of bits in the stream */ |
| } asn_per_data_t; |
| |
| /* |
| * Extract a small number of bits (<= 24) from the specified PER data pointer. |
| * This function returns -1 if the specified number of bits could not be |
| * extracted due to EOD or other conditions. |
| */ |
| int32_t per_get_few_bits(asn_per_data_t *per_data, int get_nbits); |
| |
| /* |
| * Extract a large number of bits from the specified PER data pointer. |
| * This function returns -1 if the specified number of bits could not be |
| * extracted due to EOD or other conditions. |
| */ |
| int per_get_many_bits(asn_per_data_t *pd, uint8_t *dst, int right_align, |
| int get_nbits); |
| |
| /* |
| * Get the length "n" from the Unaligned PER stream. |
| */ |
| ssize_t uper_get_length(asn_per_data_t *pd, |
| int effective_bound_bits, |
| int *repeat); |
| |
| /* |
| * Get the normally small non-negative whole number. |
| */ |
| ssize_t uper_get_nsnnwn(asn_per_data_t *pd); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _PER_SUPPORT_H_ */ |