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#include "fmt.h"
#include "textcode.h"
#include "str.h"
#include "haveinline.h"
size_t fmt_xml(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;";
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;