X-Git-Url: https://git.stg.codes/stg.git/blobdiff_plain/8c6fa3fbaccc22127280bf77a48fab5a3ee0716e..46b0747592074017ff0ea4b33d4a7194235886e5:/stglibs/smux.lib/per_support.c

diff --git a/stglibs/smux.lib/per_support.c b/stglibs/smux.lib/per_support.c
deleted file mode 100644
index c8344193..00000000
--- a/stglibs/smux.lib/per_support.c
+++ /dev/null
@@ -1,318 +0,0 @@
-/*
- * Copyright (c) 2005, 2006 Lev Walkin <vlm@lionet.info>. All rights reserved.
- * Redistribution and modifications are permitted subject to BSD license.
- */
-#include <asn_system.h>
-#include <asn_internal.h>
-#include <per_support.h>
-
-/*
- * Extract a small number of bits (<= 31) from the specified PER data pointer.
- */
-int32_t
-per_get_few_bits(asn_per_data_t *pd, int nbits) {
-	size_t off;	/* Next after last bit offset */
-	uint32_t accum;
-	const uint8_t *buf;
-
-	if(nbits < 0 || pd->nboff + nbits > pd->nbits)
-		return -1;
-
-	ASN_DEBUG("[PER get %d bits from %p+%d bits]",
-		nbits, pd->buffer, pd->nboff);
-
-	/*
-	 * Normalize position indicator.
-	 */
-	if(pd->nboff >= 8) {
-		pd->buffer += (pd->nboff >> 3);
-		pd->nbits  -= (pd->nboff & ~0x07);
-		pd->nboff  &= 0x07;
-	}
-	off = (pd->nboff += nbits);
-	buf = pd->buffer;
-
-	/*
-	 * Extract specified number of bits.
-	 */
-	if(off <= 8)
-		accum = nbits ? (buf[0]) >> (8 - off) : 0;
-	else if(off <= 16)
-		accum = ((buf[0] << 8) + buf[1]) >> (16 - off);
-	else if(off <= 24)
-		accum = ((buf[0] << 16) + (buf[1] << 8) + buf[2]) >> (24 - off);
-	else if(off <= 31)
-		accum = ((buf[0] << 24) + (buf[1] << 16)
-			+ (buf[2] << 8) + (buf[3])) >> (32 - off);
-	else if(nbits <= 31) {
-		asn_per_data_t tpd = *pd;
-		/* Here are we with our 31-bits limit plus 1..7 bits offset. */
-		tpd.nboff -= nbits;
-		accum  = per_get_few_bits(&tpd, nbits - 24) << 24;
-		accum |= per_get_few_bits(&tpd, 24);
-	} else {
-		pd->nboff -= nbits;	/* Oops, revert back */
-		return -1;
-	}
-
-	return (accum & (((uint32_t)1 << nbits) - 1));
-}
-
-/*
- * Extract a large number of bits from the specified PER data pointer.
- */
-int
-per_get_many_bits(asn_per_data_t *pd, uint8_t *dst, int alright, int nbits) {
-	int32_t value;
-
-	if(alright && (nbits & 7)) {
-		/* Perform right alignment of a first few bits */
-		value = per_get_few_bits(pd, nbits & 0x07);
-		if(value < 0) return -1;
-		*dst++ = value;	/* value is already right-aligned */
-		nbits &= ~7;
-	}
-
-	while(nbits) {
-		if(nbits >= 24) {
-			value = per_get_few_bits(pd, 24);
-			if(value < 0) return -1;
-			*(dst++) = value >> 16;
-			*(dst++) = value >> 8;
-			*(dst++) = value;
-			nbits -= 24;
-		} else {
-			value = per_get_few_bits(pd, nbits);
-			if(value < 0) return -1;
-			if(nbits & 7) {	/* implies left alignment */
-				value <<= 8 - (nbits & 7),
-				nbits += 8 - (nbits & 7);
-				if(nbits > 24)
-					*dst++ = value >> 24;
-			}
-			if(nbits > 16)
-				*dst++ = value >> 16;
-			if(nbits > 8)
-				*dst++ = value >> 8;
-			*dst++ = value;
-			break;
-		}
-	}
-
-	return 0;
-}
-
-/*
- * Get the length "n" from the stream.
- */
-ssize_t
-uper_get_length(asn_per_data_t *pd, int ebits, int *repeat) {
-	ssize_t value;
-
-	*repeat = 0;
-
-	if(ebits >= 0) return per_get_few_bits(pd, ebits);
-
-	value = per_get_few_bits(pd, 8);
-	if(value < 0) return -1;
-	if((value & 128) == 0)	/* #10.9.3.6 */
-		return (value & 0x7F);
-	if((value & 64) == 0) {	/* #10.9.3.7 */
-		value = ((value & 63) << 8) | per_get_few_bits(pd, 8);
-		if(value < 0) return -1;
-		return value;
-	}
-	value &= 63;	/* this is "m" from X.691, #10.9.3.8 */
-	if(value < 1 || value > 4)
-		return -1;
-	*repeat = 1;
-	return (16384 * value);
-}
-
-/*
- * Get the normally small non-negative whole number.
- * X.691, #10.6
- */
-ssize_t
-uper_get_nsnnwn(asn_per_data_t *pd) {
-	ssize_t value;
-
-	value = per_get_few_bits(pd, 7);
-	if(value & 64) {	/* implicit (value < 0) */
-		value &= 63;
-		value <<= 2;
-		value |= per_get_few_bits(pd, 2);
-		if(value & 128)	/* implicit (value < 0) */
-			return -1;
-		if(value == 0)
-			return 0;
-		if(value >= 3)
-			return -1;
-		value = per_get_few_bits(pd, 8 * value);
-		return value;
-	}
-
-	return value;
-}
-
-/*
- * Put the normally small non-negative whole number.
- * X.691, #10.6
- */
-int
-uper_put_nsnnwn(asn_per_outp_t *po, int n) {
-	int bytes;
-
-	if(n <= 63) {
-		if(n < 0) return -1;
-		return per_put_few_bits(po, n, 7);
-	}
-	if(n < 256)
-		bytes = 1;
-	else if(n < 65536)
-		bytes = 2;
-	else if(n < 256 * 65536)
-		bytes = 3;
-	else
-		return -1;	/* This is not a "normally small" value */
-	if(per_put_few_bits(po, bytes, 8))
-		return -1;
-
-	return per_put_few_bits(po, n, 8 * bytes);
-}
-
-
-/*
- * Put a small number of bits (<= 31).
- */
-int
-per_put_few_bits(asn_per_outp_t *po, uint32_t bits, int obits) {
-	size_t off;	/* Next after last bit offset */
-	size_t omsk;	/* Existing last byte meaningful bits mask */
-	uint8_t *buf;
-
-	if(obits <= 0 || obits >= 32) return obits ? -1 : 0;
-
-	ASN_DEBUG("[PER put %d bits to %p+%d bits]",
-			obits, po->buffer, po->nboff);
-
-	/*
-	 * Normalize position indicator.
-	 */
-	if(po->nboff >= 8) {
-		po->buffer += (po->nboff >> 3);
-		po->nbits  -= (po->nboff & ~0x07);
-		po->nboff  &= 0x07;
-	}
-
-	/*
-	 * Flush whole-bytes output, if necessary.
-	 */
-	if(po->nboff + obits > po->nbits) {
-		int complete_bytes = (po->buffer - po->tmpspace);
-		if(po->outper(po->buffer, complete_bytes, po->op_key) < 0)
-			return -1;
-		if(po->nboff)
-			po->tmpspace[0] = po->buffer[0];
-		po->buffer = po->tmpspace;
-		po->nbits = 8 * sizeof(po->tmpspace);
-		po->flushed_bytes += complete_bytes;
-	}
-
-	/*
-	 * Now, due to sizeof(tmpspace), we are guaranteed large enough space.
-	 */
-	buf = po->buffer;
-	omsk = ~((1 << (8 - po->nboff)) - 1);
-	off = (po->nboff += obits);
-
-	/* Clear data of debris before meaningful bits */
-	bits &= (((uint32_t)1 << obits) - 1);
-
-	ASN_DEBUG("[PER out %d %u/%x (t=%d,o=%d) %x&%x=%x]", obits, bits, bits,
-		po->nboff - obits, off, buf[0], omsk&0xff, buf[0] & omsk);
-
-	if(off <= 8)	/* Completely within 1 byte */
-		bits <<= (8 - off),
-		buf[0] = (buf[0] & omsk) | bits;
-	else if(off <= 16)
-		bits <<= (16 - off),
-		buf[0] = (buf[0] & omsk) | (bits >> 8),
-		buf[1] = bits;
-	else if(off <= 24)
-		bits <<= (24 - off),
-		buf[0] = (buf[0] & omsk) | (bits >> 16),
-		buf[1] = bits >> 8,
-		buf[2] = bits;
-	else if(off <= 31)
-		bits <<= (32 - off),
-		buf[0] = (buf[0] & omsk) | (bits >> 24),
-		buf[1] = bits >> 16,
-		buf[2] = bits >> 8,
-		buf[3] = bits;
-	else {
-		ASN_DEBUG("->[PER out split %d]", obits);
-		per_put_few_bits(po, bits >> 8, 24);
-		per_put_few_bits(po, bits, obits - 24);
-		ASN_DEBUG("<-[PER out split %d]", obits);
-	}
-
-	ASN_DEBUG("[PER out %u/%x => %02x buf+%d]",
-		bits, bits, buf[0], po->buffer - po->tmpspace);
-
-	return 0;
-}
-
-
-/*
- * Output a large number of bits.
- */
-int
-per_put_many_bits(asn_per_outp_t *po, const uint8_t *src, int nbits) {
-
-	while(nbits) {
-		uint32_t value;
-
-		if(nbits >= 24) {
-			value = (src[0] << 16) | (src[1] << 8) | src[2];
-			src += 3;
-			nbits -= 24;
-			if(per_put_few_bits(po, value, 24))
-				return -1;
-		} else {
-			value = src[0];
-			if(nbits > 8)
-				value = (value << 8) | src[1];
-			if(nbits > 16)
-				value = (value << 8) | src[2];
-			if(nbits & 0x07)
-				value >>= (8 - (nbits & 0x07));
-			if(per_put_few_bits(po, value, nbits))
-				return -1;
-			break;
-		}
-	}
-
-	return 0;
-}
-
-/*
- * Put the length "n" (or part of it) into the stream.
- */
-ssize_t
-uper_put_length(asn_per_outp_t *po, size_t length) {
-
-	if(length <= 127)	/* #10.9.3.6 */
-		return per_put_few_bits(po, length, 8)
-			? -1 : (ssize_t)length;
-	else if(length < 16384)	/* #10.9.3.7 */
-		return per_put_few_bits(po, length|0x8000, 16)
-			? -1 : (ssize_t)length;
-
-	length >>= 14;
-	if(length > 4) length = 4;
-
-	return per_put_few_bits(po, 0xC0 | length, 8)
-			? -1 : (ssize_t)(length << 14);
-}
-