From 5dc0c4c86eb3f1bcd91084ebcda11cda98ce1313 Mon Sep 17 00:00:00 2001
From: skarg <skarg@1e814d3a-8a88-4260-be86-c0dc25669c1e>
Date: Wed, 25 Jul 2007 14:56:35 +0000
Subject: [PATCH] Moved encoding and decoding of integers out of bacdcode.c,
 and now relying on bacint.c.  This should also help Feature Request 1532291
 for reducing code size.

---
 bacnet-stack/bacdcode.c | 447 +---------------------------------------
 bacnet-stack/bacint.c   |   3 +-
 2 files changed, 2 insertions(+), 448 deletions(-)

diff --git a/bacnet-stack/bacdcode.c b/bacnet-stack/bacdcode.c
index 080afc1b..864d5635 100644
--- a/bacnet-stack/bacdcode.c
+++ b/bacnet-stack/bacdcode.c
@@ -39,6 +39,7 @@
 #include "bacenum.h"
 #include "bits.h"
 #include "bacstr.h"
+#include "bacint.h"
 
 /* NOTE: byte order plays a role in decoding multibyte values */
 /* http://www.unixpapa.com/incnote/byteorder.html */
@@ -188,347 +189,6 @@ int decode_max_apdu(uint8_t octet)
     return max_apdu;
 }
 
-int encode_unsigned16(uint8_t * apdu, uint16_t value)
-{
-    union {
-        uint8_t byte[2];
-        uint16_t value;
-    } short_data = { {
-    0}};
-
-    short_data.value = value;
-#if BIG_ENDIAN
-    apdu[0] = short_data.byte[0];
-    apdu[1] = short_data.byte[1];
-#else
-    apdu[0] = short_data.byte[1];
-    apdu[1] = short_data.byte[0];
-#endif
-
-    return 2;
-}
-
-int decode_unsigned16(uint8_t * apdu, uint16_t * value)
-{
-    union {
-        uint8_t byte[2];
-        uint16_t value;
-    } short_data = { {
-    0}};
-
-#if BIG_ENDIAN
-    short_data.byte[0] = apdu[0];
-    short_data.byte[1] = apdu[1];
-#else
-    short_data.byte[1] = apdu[0];
-    short_data.byte[0] = apdu[1];
-#endif
-    if (value)
-        *value = short_data.value;
-
-    return 2;
-}
-
-int encode_unsigned24(uint8_t * apdu, uint32_t value)
-{
-    union {
-        uint8_t byte[4];
-        uint32_t value;
-    } long_data = { {
-    0}};
-
-    long_data.value = value;
-#if BIG_ENDIAN
-    apdu[0] = long_data.byte[1];
-    apdu[1] = long_data.byte[2];
-    apdu[2] = long_data.byte[3];
-#else
-    apdu[0] = long_data.byte[2];
-    apdu[1] = long_data.byte[1];
-    apdu[2] = long_data.byte[0];
-#endif
-
-    return 3;
-}
-
-int decode_unsigned24(uint8_t * apdu, uint32_t * value)
-{
-    union {
-        uint8_t byte[4];
-        uint32_t value;
-    } long_data = { {
-    0}};
-
-#if BIG_ENDIAN
-    long_data.byte[1] = apdu[0];
-    long_data.byte[2] = apdu[1];
-    long_data.byte[3] = apdu[2];
-#else
-    long_data.byte[2] = apdu[0];
-    long_data.byte[1] = apdu[1];
-    long_data.byte[0] = apdu[2];
-#endif
-    if (value)
-        *value = long_data.value;
-
-    return 3;
-}
-
-int encode_unsigned32(uint8_t * apdu, uint32_t value)
-{
-    union {
-        uint8_t byte[4];
-        uint32_t value;
-    } long_data = { {
-    0}};
-
-    long_data.value = value;
-#if BIG_ENDIAN
-    apdu[0] = long_data.byte[0];
-    apdu[1] = long_data.byte[1];
-    apdu[2] = long_data.byte[2];
-    apdu[3] = long_data.byte[3];
-#else
-    apdu[0] = long_data.byte[3];
-    apdu[1] = long_data.byte[2];
-    apdu[2] = long_data.byte[1];
-    apdu[3] = long_data.byte[0];
-#endif
-
-    return 4;
-}
-
-int decode_unsigned32(uint8_t * apdu, uint32_t * value)
-{
-    union {
-        uint8_t byte[4];
-        uint32_t value;
-    } long_data = { {
-    0}};
-
-#if BIG_ENDIAN
-    long_data.byte[0] = apdu[0];
-    long_data.byte[1] = apdu[1];
-    long_data.byte[2] = apdu[2];
-    long_data.byte[3] = apdu[3];
-#else
-    long_data.byte[3] = apdu[0];
-    long_data.byte[2] = apdu[1];
-    long_data.byte[1] = apdu[2];
-    long_data.byte[0] = apdu[3];
-#endif
-    if (value)
-        *value = long_data.value;
-
-    return 4;
-}
-
-/* returns the number of APDU octets used */
-int encode_signed8(uint8_t * apdu, int8_t value)
-{
-    union {
-        uint8_t byte;
-        int8_t value;
-    } byte_data = {
-    0};
-
-    byte_data.value = value;
-    apdu[0] = byte_data.byte;
-
-    return 1;
-}
-
-/* returns the number of APDU octets consumed */
-int decode_signed8(uint8_t * apdu, int32_t * value)
-{
-    union {
-        uint8_t byte[4];
-        int32_t value;
-    } long_data = { {
-    0}};
-
-#if BIG_ENDIAN
-    /* negative - bit 7 is set */
-    if (apdu[0] & 0x80) {
-        long_data.byte[0] = 0xFF;
-        long_data.byte[1] = 0xFF;
-        long_data.byte[2] = 0xFF;
-    }
-    /* fill in the rest */
-    long_data.byte[3] = apdu[0];
-#else
-    /* negative - bit 7 is set */
-    if (apdu[0] & 0x80) {
-        long_data.byte[3] = 0xFF;
-        long_data.byte[2] = 0xFF;
-        long_data.byte[1] = 0xFF;
-    }
-    /* fill in the rest */
-    long_data.byte[0] = apdu[0];
-#endif
-    if (value)
-        *value = long_data.value;
-
-    return 1;
-}
-
-/* returns the number of APDU octets used */
-int encode_signed16(uint8_t * apdu, int16_t value)
-{
-    union {
-        uint8_t byte[2];
-        int16_t value;
-    } short_data = { {
-    0}};
-
-    short_data.value = value;
-#if BIG_ENDIAN
-    apdu[0] = short_data.byte[0];
-    apdu[1] = short_data.byte[1];
-#else
-    apdu[0] = short_data.byte[1];
-    apdu[1] = short_data.byte[0];
-#endif
-
-    return 2;
-}
-
-/* returns the number of APDU octets consumed */
-int decode_signed16(uint8_t * apdu, int32_t * value)
-{
-    union {
-        uint8_t byte[4];
-        int32_t value;
-    } long_data = { {
-    0}};
-
-#if BIG_ENDIAN
-    /* negative - bit 7 is set */
-    if (apdu[0] & 0x80) {
-        long_data.byte[0] = 0xFF;
-        long_data.byte[1] = 0xFF;
-    }
-    /* fill in the rest */
-    long_data.byte[2] = apdu[0];
-    long_data.byte[3] = apdu[1];
-#else
-    /* negative - bit 7 is set */
-    if (apdu[0] & 0x80) {
-        long_data.byte[3] = 0xFF;
-        long_data.byte[2] = 0xFF;
-    }
-    /* fill in the rest */
-    long_data.byte[1] = apdu[0];
-    long_data.byte[0] = apdu[1];
-#endif
-    if (value)
-        *value = long_data.value;
-
-    return 2;
-}
-
-int encode_signed24(uint8_t * apdu, int32_t value)
-{
-    union {
-        uint8_t byte[4];
-        int32_t value;
-    } long_data = { {
-    0}};
-
-    long_data.value = value;
-#if BIG_ENDIAN
-    apdu[0] = long_data.byte[1];
-    apdu[1] = long_data.byte[2];
-    apdu[2] = long_data.byte[3];
-#else
-    apdu[0] = long_data.byte[2];
-    apdu[1] = long_data.byte[1];
-    apdu[2] = long_data.byte[0];
-#endif
-
-    return 3;
-}
-
-int decode_signed24(uint8_t * apdu, int32_t * value)
-{
-    union {
-        uint8_t byte[4];
-        int32_t value;
-    } long_data = { {
-    0}};
-
-#if BIG_ENDIAN
-    /* negative - bit 7 is set */
-    if (apdu[0] & 0x80)
-        long_data.byte[0] = 0xFF;
-    /* fill in the rest */
-    long_data.byte[1] = apdu[0];
-    long_data.byte[2] = apdu[1];
-    long_data.byte[3] = apdu[2];
-#else
-    /* negative - bit 7 is set */
-    if (apdu[0] & 0x80)
-        long_data.byte[3] = 0xFF;
-    /* fill in the rest */
-    long_data.byte[2] = apdu[0];
-    long_data.byte[1] = apdu[1];
-    long_data.byte[0] = apdu[2];
-#endif
-    if (value)
-        *value = long_data.value;
-
-    return 3;
-}
-
-int encode_signed32(uint8_t * apdu, int32_t value)
-{
-    union {
-        uint8_t byte[4];
-        int32_t value;
-    } long_data = { {
-    0}};
-
-    long_data.value = value;
-#if BIG_ENDIAN
-    apdu[0] = long_data.byte[0];
-    apdu[1] = long_data.byte[1];
-    apdu[2] = long_data.byte[2];
-    apdu[3] = long_data.byte[3];
-#else
-    apdu[0] = long_data.byte[3];
-    apdu[1] = long_data.byte[2];
-    apdu[2] = long_data.byte[1];
-    apdu[3] = long_data.byte[0];
-#endif
-
-    return 4;
-}
-
-int decode_signed32(uint8_t * apdu, int32_t * value)
-{
-    union {
-        uint8_t byte[4];
-        int32_t value;
-    } long_data = { {
-    0}};
-
-#if BIG_ENDIAN
-    long_data.byte[0] = apdu[0];
-    long_data.byte[1] = apdu[1];
-    long_data.byte[2] = apdu[2];
-    long_data.byte[3] = apdu[3];
-#else
-    long_data.byte[3] = apdu[0];
-    long_data.byte[2] = apdu[1];
-    long_data.byte[1] = apdu[2];
-    long_data.byte[0] = apdu[3];
-#endif
-    if (value)
-        *value = long_data.value;
-
-    return 4;
-}
-
 /* from clause 20.2.1 General Rules for Encoding BACnet Tags */
 /* returns the number of apdu bytes consumed */
 int encode_tag(uint8_t * apdu, uint8_t tag_number, bool context_specific,
@@ -1227,27 +887,6 @@ int decode_character_string(uint8_t * apdu, uint32_t len_value,
     return len;
 }
 
-/* from clause 20.2.4 Encoding of an Unsigned Integer Value */
-/* and 20.2.1 General Rules for Encoding BACnet Tags */
-/* returns the number of apdu bytes consumed */
-int encode_bacnet_unsigned(uint8_t * apdu, uint32_t value)
-{
-    int len = 0;                /* return value */
-
-    if (value < 0x100) {
-        apdu[0] = (uint8_t) value;
-        len = 1;
-    } else if (value < 0x10000) {
-        len = encode_unsigned16(&apdu[0], (uint16_t) value);
-    } else if (value < 0x1000000) {
-        len = encode_unsigned24(&apdu[0], value);
-    } else {
-        len = encode_unsigned32(&apdu[0], value);
-    }
-
-    return len;
-}
-
 /* from clause 20.2.4 Encoding of an Unsigned Integer Value */
 /* and 20.2.1 General Rules for Encoding BACnet Tags */
 /* returns the number of apdu bytes consumed */
@@ -1279,37 +918,6 @@ int encode_tagged_unsigned(uint8_t * apdu, uint32_t value)
     return len;
 }
 
-/* from clause 20.2.4 Encoding of an Unsigned Integer Value */
-/* and 20.2.1 General Rules for Encoding BACnet Tags */
-/* returns the number of apdu bytes consumed */
-int decode_unsigned(uint8_t * apdu, uint32_t len_value, uint32_t * value)
-{
-    uint16_t unsigned16_value = 0;
-
-    if (value) {
-        switch (len_value) {
-        case 1:
-            *value = apdu[0];
-            break;
-        case 2:
-            decode_unsigned16(&apdu[0], &unsigned16_value);
-            *value = unsigned16_value;
-            break;
-        case 3:
-            decode_unsigned24(&apdu[0], value);
-            break;
-        case 4:
-            decode_unsigned32(&apdu[0], value);
-            break;
-        default:
-            *value = 0;
-            break;
-        }
-    }
-
-    return len_value;
-}
-
 /* from clause 20.2.11 Encoding of an Enumerated Value */
 /* and 20.2.1 General Rules for Encoding BACnet Tags */
 /* returns the number of apdu bytes consumed */
@@ -1366,59 +974,6 @@ int encode_context_enumerated(uint8_t * apdu, int tag_number, int value)
     return len;
 }
 
-/* from clause 20.2.5 Encoding of a Signed Integer Value */
-/* and 20.2.1 General Rules for Encoding BACnet Tags */
-/* returns the number of apdu bytes consumed */
-int decode_signed(uint8_t * apdu, uint32_t len_value, int32_t * value)
-{
-    if (value) {
-        switch (len_value) {
-        case 1:
-            decode_signed8(&apdu[0], value);
-            break;
-        case 2:
-            decode_signed16(&apdu[0], value);
-            break;
-        case 3:
-            decode_signed24(&apdu[0], value);
-            break;
-        case 4:
-            decode_signed32(&apdu[0], value);
-            break;
-        default:
-            *value = 0;
-            break;
-        }
-    }
-
-    return len_value;
-}
-
-/* from clause 20.2.5 Encoding of a Signed Integer Value */
-/* and 20.2.1 General Rules for Encoding BACnet Tags */
-/* returns the number of apdu bytes consumed */
-int encode_bacnet_signed(uint8_t * apdu, int32_t value)
-{
-    int len = 0;                /* return value */
-
-    /* don't encode the leading X'FF' or X'00' of the two's compliment.
-       That is, the first octet of any multi-octet encoded value shall
-       not be X'00' if the most significant bit (bit 7) of the second
-       octet is 0, and the first octet shall not be X'FF' if the most
-       significant bit of the second octet is 1. */
-    if ((value >= -128) && (value < 128)) {
-        len = encode_signed8(&apdu[0], (int8_t) value);
-    } else if ((value >= -32768) && (value < 32768)) {
-        len = encode_signed16(&apdu[0], (int16_t) value);
-    } else if ((value > -8388608) && (value < 8388608)) {
-        len = encode_signed24(&apdu[0], value);
-    } else {
-        len = encode_signed32(&apdu[0], value);
-    }
-
-    return len;
-}
-
 /* from clause 20.2.5 Encoding of a Signed Integer Value */
 /* and 20.2.1 General Rules for Encoding BACnet Tags */
 /* returns the number of apdu bytes consumed */
diff --git a/bacnet-stack/bacint.c b/bacnet-stack/bacint.c
index 38e15c7e..11369576 100644
--- a/bacnet-stack/bacint.c
+++ b/bacnet-stack/bacint.c
@@ -541,7 +541,6 @@ void testBACnetUnsigned(Test * pTest)
     }
 }
 
-
 #ifdef TEST_BACINT
 int main(void)
 {
@@ -576,5 +575,5 @@ int main(void)
 
     return 0;
 }
-#endif                          /* TEST_DECODE */
+#endif                          /* TEST_BACINT */
 #endif                          /* TEST */