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glonass special sign support

pull/1/head
bert hubert 2019-08-26 00:17:41 +02:00
parent 661a7e0e23
commit c0e13d3a42
2 changed files with 9 additions and 0 deletions
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8
bits.cc
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@ -15,6 +15,14 @@ int getbits(const unsigned char *buff, int pos, int len)
return (int)(bits|(~0u<<len)); /* extend sign */ return (int)(bits|(~0u<<len)); /* extend sign */
} }
int getbitsglonass(const unsigned char *buff, int pos, int len)
{
int val = getbitu(buff,pos+1,len-1);
return getbitu(buff,pos,1) ? - val : val;
}
void setbitu(unsigned char *buff, int pos, int len, unsigned int data) void setbitu(unsigned char *buff, int pos, int len, unsigned int data)
{ {
unsigned int mask=1u<<(len-1); unsigned int mask=1u<<(len-1);

1
bits.hh
View File

@ -3,5 +3,6 @@
unsigned int getbitu(const unsigned char *buff, int pos, int len); unsigned int getbitu(const unsigned char *buff, int pos, int len);
int getbits(const unsigned char *buff, int pos, int len); int getbits(const unsigned char *buff, int pos, int len);
int getbitsglonass(const unsigned char *buff, int pos, int len);
void setbitu(unsigned char *buff, int pos, int len, unsigned int data); void setbitu(unsigned char *buff, int pos, int len, unsigned int data);
unsigned int rtk_crc24q(const unsigned char *buff, int len); unsigned int rtk_crc24q(const unsigned char *buff, int len);