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61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
#include "fmt.h"
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#include "textcode.h"
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#include "scan.h"
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static size_t inner_scan_urlencoded(const char *src,char *dest,size_t *destlen,int plus) {
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register const unsigned char* s=(const unsigned char*) src;
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size_t written=0,i;
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for (i=0; s[i]; ++i) {
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if (s[i]=='%') {
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int j=scan_fromhex(s[i+1]);
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unsigned char c;
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if (j<0) break;
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c=j<<4;
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j=scan_fromhex(s[i+2]);
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if (j<0) break;
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dest[written]=c|j;
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i+=2;
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} else if (s[i]=='+' && plus)
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dest[written]=' ';
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else if (s[i]<=' ' || s[i]=='?' || s[i]=='&')
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break; /* invalid input */
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else
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dest[written]=s[i];
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++written;
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}
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*destlen=written;
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return i;
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}
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size_t scan_urlencoded(const char *src,char *dest,size_t *destlen) {
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return inner_scan_urlencoded(src,dest,destlen,1);
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}
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size_t scan_urlencoded2(const char *src,char *dest,size_t *destlen) {
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return inner_scan_urlencoded(src,dest,destlen,0);
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}
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#ifdef UNITTEST
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#include <assert.h>
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#include <string.h>
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#undef UNITTEST
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#include <scan/scan_fromhex.c>
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int main() {
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char buf[100];
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size_t l;
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/* check base operation */
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memset(buf,'?',sizeof(buf));
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assert(scan_urlencoded("foo%2ebar",buf,&l)==9 && l==7 && !memcmp(buf,"foo.bar?",8));
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/* check + handling */
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memset(buf,'?',sizeof(buf));
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assert(scan_urlencoded("foo+bar",buf,&l)==7 && l==7 && !memcmp(buf,"foo bar?",8));
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assert(scan_urlencoded2("foo+bar",buf,&l)==7 && l==7 && !memcmp(buf,"foo+bar?",8));
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/* check that we abort on invalid sequences */
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memset(buf,'?',sizeof(buf));
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assert(scan_urlencoded("foo%2xbar",buf,&l)==3 && l==3 && !memcmp(buf,"foo?",4));
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assert(scan_urlencoded("foo\nbar",buf,&l)==3 && l==3 && !memcmp(buf,"foo?",4));
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assert(scan_urlencoded("foo bar",buf,&l)==3 && l==3 && !memcmp(buf,"foo?",4));
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}
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#endif
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