File: xstring.h

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#ifndef SQUID_COMPAT_XSTRING_H
#define SQUID_COMPAT_XSTRING_H

#if HAVE_STRING_H
#include <string.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif

    /**
     * xstrdup() - same as strdup(3).  Used for portability.
     * Never returns NULL; fatal on error.
     *
     * Sets errno to EINVAL if a NULL pointer is passed.
     *
     * Define failure_notify to receive error message.
     * otherwise perror() is used to display it.
     */
    char *xstrdup(const char *s);

#ifdef strdup
#undef strdup
#endif
#define strdup(X) xstrdup((X))

    /*
     *  xstrncpy() - similar to strncpy(3) but terminates string
     *  always with '\0' if (n != 0 and dst != NULL),
     *  and doesn't do padding
     */
    char *xstrncpy(char *dst, const char *src, size_t n);

    /**
     * xstrndup() - same as strndup(3).  Used for portability.
     * Never returns NULL; fatal on error.
     *
     * Sets errno to EINVAL if a NULL pointer or negative
     * length is passed.
     *
     * Define failure_notify to receive error message.
     * otherwise perror() is used to display it.
     */
    char *xstrndup(const char *s, size_t n);

#ifdef strndup
#undef strndup
#endif
#define strndup(X) xstrndup((X))

#ifdef __cplusplus
}
#endif

#endif /* SQUID_COMPAT_XSTRING_H */