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38 lines
977 B
C
38 lines
977 B
C
#include "fmt.h"
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#include "textcode.h"
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#include "str.h"
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#include "haveinline.h"
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static inline int issafe(unsigned char c) {
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const char safe[] = "$/.=~-_";
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return ((c>='A' && c<='Z') ||
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(c>='a' && c<='z') ||
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(c>='0' && c<='9') ||
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safe[str_chr(safe,c)]);
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}
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size_t fmt_urlencoded2(char* dest,const char* src,size_t len,const char* escapeme) {
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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; i<len; ++i) {
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if (!issafe(s[i]) || escapeme[str_chr(escapeme,s[i])]==s[i]) {
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if (dest) {
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dest[written]='%';
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dest[written+1]=fmt_tohex(s[i]>>4);
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dest[written+2]=fmt_tohex(s[i]&15);
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}
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written+=3;
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} else {
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if (dest) dest[written]=s[i];
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++written;
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}
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/* in case someone gives us malicious input */
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if (written>((size_t)-1)/2) return (size_t)-1;
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}
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return written;
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}
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size_t fmt_urlencoded(char* dest,const char* src,size_t len) {
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return fmt_urlencoded2(dest,src,len,"");
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}
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