mirror of
https://github.com/9fans/plan9port.git
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59 lines
995 B
C
59 lines
995 B
C
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#include <u.h>
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#include <libc.h>
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#include <bin.h>
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#include <httpd.h>
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/* go from url with escaped utf to utf */
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char *
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hurlunesc(HConnect *cc, char *s)
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{
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char *t, *v, *u;
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Rune r;
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int c, n;
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/* unescape */
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u = halloc(cc, strlen(s)+1);
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for(t = u; c = *s; s++){
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if(c == '%'){
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n = s[1];
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if(n >= '0' && n <= '9')
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n = n - '0';
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else if(n >= 'A' && n <= 'F')
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n = n - 'A' + 10;
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else if(n >= 'a' && n <= 'f')
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n = n - 'a' + 10;
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else
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break;
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r = n;
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n = s[2];
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if(n >= '0' && n <= '9')
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n = n - '0';
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else if(n >= 'A' && n <= 'F')
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n = n - 'A' + 10;
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else if(n >= 'a' && n <= 'f')
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n = n - 'a' + 10;
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else
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break;
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s += 2;
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c = (r<<4)+n;
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}
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*t++ = c;
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}
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*t = '\0';
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/* convert to valid utf */
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v = halloc(cc, UTFmax*strlen(u) + 1);
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s = u;
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t = v;
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while(*s){
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/* in decoding error, assume latin1 */
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if((n=chartorune(&r, s)) == 1 && r == Runeerror)
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r = (uchar)*s;
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s += n;
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t += runetochar(t, &r);
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}
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*t = '\0';
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return v;
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}
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