diff options
Diffstat (limited to 'apt-pkg/contrib/strutl.cc')
| -rw-r--r-- | apt-pkg/contrib/strutl.cc | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/apt-pkg/contrib/strutl.cc b/apt-pkg/contrib/strutl.cc index fb5f6683c..17a23709b 100644 --- a/apt-pkg/contrib/strutl.cc +++ b/apt-pkg/contrib/strutl.cc @@ -1,6 +1,6 @@ // -*- mode: cpp; mode: fold -*- // Description /*{{{*/ -// $Id: strutl.cc,v 1.27 1999/07/26 17:46:08 jgg Exp $ +// $Id: strutl.cc,v 1.28 1999/08/02 03:07:48 jgg Exp $ /* ###################################################################### String Util - Some usefull string functions. @@ -693,6 +693,43 @@ bool StrToNum(const char *Str,unsigned long &Res,unsigned Len,unsigned Base) return true; } /*}}}*/ +// HexDigit - Convert a hex character into an integer /*{{{*/ +// --------------------------------------------------------------------- +/* Helper for Hex2Num */ +static int HexDigit(int c) +{ + if (c >= '0' && c <= '9') + return c - '0'; + if (c >= 'a' && c <= 'f') + return c - 'a' + 10; + if (c >= 'A' && c <= 'F') + return c - 'A' + 10; + return 0; +} + /*}}}*/ +// Hex2Num - Convert a long hex number into a buffer /*{{{*/ +// --------------------------------------------------------------------- +/* The length of the buffer must be exactly 1/2 the length of the string. */ +bool Hex2Num(const char *Start,const char *End,unsigned char *Num, + unsigned int Length) +{ + if (End - Start != Length*2) + return false; + + // Convert each digit. We store it in the same order as the string + int J = 0; + for (const char *I = Start; I < End;J++, I += 2) + { + if (isxdigit(*I) == 0 || isxdigit(I[1]) == 0) + return false; + + Num[J] = HexDigit(I[0]) << 4; + Num[J] += HexDigit(I[1]); + } + + return true; +} + /*}}}*/ // URI::CopyFrom - Copy from an object /*{{{*/ // --------------------------------------------------------------------- |