48 lines
1.1 KiB
C++
Executable File
48 lines
1.1 KiB
C++
Executable File
#ifdef NALL_STRING_CPP
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//strlcpy, strlcat based on OpenBSD implementation by Todd C. Miller
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//return = strlen(src)
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size_t strlcpy(char *dest, const char *src, size_t length) {
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char *d = dest;
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const char *s = src;
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size_t n = length;
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if(n) {
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while(--n && (*d++ = *s++)); //copy as many bytes as possible, or until null terminator reached
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}
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if(!n) {
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if(length) *d = 0;
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while(*s++); //traverse rest of s, so that s - src == strlen(src)
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}
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return (s - src - 1); //return length of copied string, sans null terminator
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}
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//return = strlen(src) + min(length, strlen(dest))
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size_t strlcat(char *dest, const char *src, size_t length) {
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char *d = dest;
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const char *s = src;
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size_t n = length;
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while(n-- && *d) d++; //find end of dest
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size_t dlength = d - dest;
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n = length - dlength; //subtract length of dest from maximum string length
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if(!n) return dlength + strlen(s);
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while(*s) {
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if(n != 1) {
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*d++ = *s;
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n--;
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}
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s++;
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}
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*d = 0;
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return dlength + (s - src); //return length of resulting string, sans null terminator
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}
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#endif
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