misc/examples/regex1.c


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#define i_extern
#include <stc/cregex.h>

int main(int argc, char* argv[])
{
    if (argc <= 1) {
        printf("Usage: regex1 -i\n");
        return 0;
    }
    c_auto (cstr, input)
    c_auto (cregex, float_expr)
    {
        int res = cregex_compile(&float_expr, "^[+-]?[0-9]+((\\.[0-9]*)?|\\.[0-9]+)$");
        // Until "q" is given, ask for another number
        if (res > 0) while (true)
        {
            printf("Enter a double precision number (q for quit): ");
            cstr_getline(&input, stdin);

            // Exit when the user inputs q
            if (cstr_equals(&input, "q"))
                break;

            if (cregex_is_match(&float_expr, cstr_str(&input)))
                printf("Input is a float\n");
            else
                printf("Invalid input : Not a float\n");
        }
    }
}