pollution: c
int isalnum(int c); 

pollution: c
int isalnum_l(int c, locale_t _loc); 

pollution: c
int isalpha(int c); 

pollution: c
int isalpha_l(int c, locale_t _loc); 

pollution: c
[[deprecated]] int isascii(int c); 

pollution: c
int isblank(int c); 

pollution: c
int isblank_l(int c, locale_t _loc); 

pollution: c
int iscntrl(int c); 

pollution: c
int iscntrl_l(int c, locale_t _loc); 

pollution: c
int isdigit(int c); 

pollution: c
int isdigit_l(int c, locale_t _loc); 

pollution: c
int isgraph(int c); 

pollution: c
int isgraph_l(int c, locale_t _loc); 

pollution: c
int islower(int c); 

pollution: c
int islower_l(int c, locale_t _loc); 

pollution: c
int isprint(int c); 

pollution: c
int isprint_l(int c, locale_t _loc); 

pollution: c
int ispunct(int c); 

pollution: c
int ispunct_l(int c, locale_t _loc); 

pollution: c
int isspace(int c); 

pollution: c
int isspace_l(int c, locale_t _loc); 

pollution: c
int isupper(int c); 

pollution: c
int isupper_l(int c, locale_t _loc); 

pollution: c
int isxdigit(int c); 

pollution: c
int isxdigit_l(int c, locale_t _loc); 

pollution: c
[[deprecated]] int toascii(int c); 

pollution: c
int tolower(int c); 

pollution: c
int tolower_l(int c, locale_t _loc); 

pollution: c
int toupper(int c); 

pollution: c
int toupper_l(int c, locale_t _loc);