c_isalpha          71 gnulib-tests/test-c-ctype.c           ASSERT (c_isalpha (c) == 1);
c_isalpha          74 gnulib-tests/test-c-ctype.c           ASSERT (c_isalpha (c) == 0);
c_isalpha         126 lib/c-ctype.h  extern bool c_isalpha (int c);