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27 lines
684 B
C

#include "fmt.h"
#include "textcode.h"
#include "str.h"
#include "haveinline.h"
size_t fmt_html(char* dest,const char* src,size_t len) {
register const unsigned char* s=(const unsigned char*) src;
size_t written=0,i;
const char* seq;
for (i=0; i<len; ++i) {
switch (s[i]) {
case '&': seq="&amp;"; goto doit;
case '<': seq="&lt;"; goto doit;
case '>': seq="&gt;"; goto doit;
case '\n':
seq="<br>";
doit:
written+=fmt_str(dest?dest+written:0,seq);
break;
default: if (dest) dest[written]=s[i]; ++written; break;
}
/* in case someone gives us malicious input */
if (written>((size_t)-1)/2) return (size_t)-1;
}
return written;
}