Function cv_isalnum

deps/opencv/modules/core/src/persistence.cpp:78–81

#define cv_isprint_or_tab(c)  ((uchar)(c) >= (uchar)' ' || (c) == '\t')

static inline bool cv_isalnum(char c)
{
    return ('0' <= c && c <= '9') || ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
}

static inline bool cv_isalpha(char c)
{