mirror of
https://github.com/emsesp/EMS-ESP32.git
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72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
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#ifdef EMSESP_STANDALONE
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#include <Arduino.h>
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#include "WString.h"
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/*
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* Copy string src to buffer dst of size dsize. At most dsize-1
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* chars will be copied. Always NUL terminates (unless dsize == 0).
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* Returns strlen(src); if retval >= dsize, truncation occurred.
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*
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* https://github.com/freebsd/freebsd/blob/master/sys/libkern/strlcpy.c
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*/
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size_t strlcpy(char * __restrict dst, const char * __restrict src, size_t dsize) {
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const char * osrc = src;
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size_t nleft = dsize;
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/* Copy as many bytes as will fit. */
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if (nleft != 0) {
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while (--nleft != 0) {
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if ((*dst++ = *src++) == '\0')
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break;
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}
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}
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/* Not enough room in dst, add NUL and traverse rest of src. */
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if (nleft == 0) {
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if (dsize != 0)
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*dst = '\0'; /* NUL-terminate dst */
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while (*src++)
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;
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}
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return (src - osrc - 1); /* count does not include NUL */
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}
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/*
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* Appends src to string dst of size siz (unlike strncat, siz is the
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* full size of dst, not space left). At most siz-1 characters
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* will be copied. Always NUL terminates (unless siz <= strlen(dst)).
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* Returns strlen(src) + MIN(siz, strlen(initial dst)).
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* If retval >= siz, truncation occurred.
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*
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* https://github.com/freebsd/freebsd/blob/master/sys/libkern/strlcat.c
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*/
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size_t strlcat(char * dst, const char * src, size_t siz) {
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char * d = dst;
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const char * s = src;
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size_t n = siz;
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size_t dlen;
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/* Find the end of dst and adjust bytes left but don't go past end */
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while (n-- != 0 && *d != '\0')
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d++;
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dlen = d - dst;
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n = siz - dlen;
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if (n == 0)
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return (dlen + strlen(s));
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while (*s != '\0') {
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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 (dlen + (s - src)); /* count does not include NUL */
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}
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#endif |