|
|
发表于 2010-1-19 19:51:31
|
显示全部楼层
util.cpp
#include "util.h" # h" _4 \* e1 A
#include <vector> & l4 s8 J# E$ j2 ~, q
7 t) d( N7 N# nusing namespace std; % z& R% @9 ?4 T3 r, h% F$ {
/ A, J7 |- c8 u! ?
char intToHexChar(int x) {
: T* m2 t, D5 ]0 W1 ^ static const char HEX[16] = { . D" V" f- v. [0 u
'0', '1', '2', '3',
: M6 E2 F+ L8 W '4', '5', '6', '7',
! C2 y( e0 k H. m '8', '9', 'A', 'B', % q" |/ p$ L( {, g. m5 f' r
'C', 'D', 'E', 'F'
& A# n5 t& Z, C: B& N% I { };
+ s& s5 a7 X4 P) B8 K1 W return HEX[x];
' l1 w/ R( ^/ X6 @/ Y} # N, }+ a5 Z( n) i9 h) H+ L# q$ ~
; x& N5 x7 H( A! P' b2 u8 g h9 R- Gint hexCharToInt(char hex) {
3 R1 V' T+ s- d( P hex = toupper(hex);
* ~" ?8 U1 m+ K9 W2 d" T if (isdigit(hex)) ( {/ y& V/ O+ \% f9 a6 Q- F
return (hex - '0');
; K$ H/ Y! B) h7 S9 B if (isalpha(hex))
$ ~% I" V! a; Z: R- B) Z return (hex - 'A' + 10);
0 G1 p: {3 R+ ?# m( h9 @ return 0;
~- `+ ?* x- @% k- ^& {}
; U3 [0 N( d# {% `: p' j c 0 f4 f& R, ~1 ]. H
string bytesToHexString(const byte *in, size_t size) {
$ I* I/ C2 J+ e+ @( S3 P string str; / O; E* i, [# F: T
for (size_t i = 0; i < size; ++i) { ' F8 \& q' V: G9 ?
int t = in[i];
/ [8 U$ R+ c$ t6 q* c$ @) P int a = t / 16; ?0 a( K3 p7 ~. j6 _1 w( T s# Z
int b = t % 16; ; S$ k5 R( Y. t+ W+ e. P
str.append(1, intToHexChar(a));
" |8 U- h, u' _, ^7 V n str.append(1, intToHexChar(b)); & p% [- A: e# ]' e; m+ G: [9 A
if (i != size - 1)
8 @5 S- Y) }: Y+ f) r* z h7 J str.append(1, ' '); % u' t/ i9 |. k2 G( O
} 2 i9 \5 j9 O: {9 K' n
return str; l* A) N+ p$ w9 h! U
}
* f; x0 m X. A8 s
) F. d( `8 o$ F, E+ Y/ j) V# ysize_t hexStringToBytes(const string &str, byte *out) { 1 W9 Q* `3 j* ]5 s0 v9 d
7 ]3 L! m. W p3 k8 \ vector<string> vec;
0 Y- m3 h2 v+ J3 V* m" ? string::size_type currPos = 0, prevPos = 0; 5 X8 ]1 _& r: s6 V! _
while ((currPos = str.find(' ', prevPos)) != string::npos) {
3 w% a- s' s7 ]+ N M string b(str.substr(prevPos, currPos - prevPos)); l; F, @$ Z7 x: f4 I* Z/ y0 h7 Z& B: h
vec.push_back(b);
0 v; V1 F) @9 [/ E; ] d1 U3 ] prevPos = currPos + 1;
6 @/ ]6 a/ v5 C/ W1 [0 u }
0 b. I- t8 u- h+ T$ ~ if (prevPos < str.size()) { 4 F. z4 F9 ]" ?3 R6 S7 p
string b(str.substr(prevPos));
# S9 z7 P5 f* R0 o/ M* t$ Z; V: I( d vec.push_back(b); " t" O8 |8 |3 L, l2 D8 d
}
- I$ z- a' E4 }, M typedef vector<string>::size_type sz_type;
, w$ m+ \# @: l0 a4 ~# g: l$ i5 D sz_type size = vec.size();
" [2 x8 T' V0 ]+ j8 X- z. @+ q4 \ for (sz_type i = 0; i < size; ++i) {
@6 H# R" \" m+ Z" W, L, w int a = hexCharToInt(vec[i][0]); , `6 s7 P9 `' s6 O. z# r7 `
int b = hexCharToInt(vec[i][1]); . _# E' F4 h1 [2 r, P8 C
out[i] = a * 16 + b; ! D9 `! o6 E% e" i
} 2 W) f- k* q# k& ^3 i! K
return size; $ F8 @) E" a) D) G& J4 a& A
} |
|