1 files changed, 165 insertions, 0 deletions
diff --git a/numericx.c b/numericx.c
new file mode 100644
index 0000000..14f23f3
--- /dev/null
+++ b/numericx.c
@@ -0,0 +1,165 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+#include <errno.h>
+
+#ifdef DEBUG
+#define DEBUG true
+#else
+#define DEBUG false
+#endif
+
+typedef struct NumeralPtr
+{
+	char const* symbol;
+	struct NumeralPtr *next;
+	struct NumeralPtr *previous;
+} numeral_ptr;
+
+char* program_name = NULL;
+
+/*
+ * Creates new digit for numeral_ptr
+ * Return pointer to new numeral_ptr
+ * Returns NULL in case of no memory
+ */
+numeral_ptr*
+new_digit(numeral_ptr* last_numeral, char const* to_first)
+{
+	numeral_ptr* starting_point = malloc(sizeof(numeral_ptr));
+	if(starting_point == NULL)
+	{
+		fprintf(stderr, "error: %s: %s!", program_name, strerror(ENOMEM));
+		return NULL;
+	}
+
+	starting_point->symbol = to_first;
+	starting_point->previous = last_numeral;
+	starting_point->next = NULL;
+
+	return starting_point;
+}
+
+void
+increment(numeral_ptr* numeral, char* num_first, char* num_last)
+{
+	bool cycled = false;
+
+	if( numeral->symbol == num_last )
+	{
+		if( numeral->next == NULL )
+			numeral->next = new_digit(numeral, num_first);
+		else
+			increment(numeral->next, num_first, num_last);
+
+		cycled = true;
+	}
+
+	if( cycled )
+		numeral->symbol = num_first;
+	else
+		++(numeral->symbol);
+}
+
+bool
+is_same_size(numeral_ptr* numeral, char* number_string)
+{
+	for( size_t i = strlen(number_string) ; !(i == 0) ; ++i )
+	{
+		if(numeral == NULL)
+			return false;
+
+		numeral = numeral->next;
+	}
+
+	return (numeral == NULL) ? true : false;
+}
+
+bool
+is_the_same(numeral_ptr* numeral, char* number_arg)
+{
+	while( !(numeral == NULL) )
+	{
+		if( *(numeral->symbol) == *(number_arg) )
+		{
+			numeral = numeral->next;
+			++(number_arg);
+			continue;
+		}
+
+		return false;
+	}
+
+	return (*number_arg == '\0') ? true : false;
+}
+
+void
+print_numeral(numeral_ptr* numeral)
+{
+	while( !(numeral == NULL) )
+	{
+		printf("%c", *(numeral->symbol));
+		numeral = numeral->next;
+	}
+
+	printf("\n");
+}
+
+int
+main(int argc, char* argv[])
+{
+	program_name = argv[0];
+
+	/* Numeral System variables from MACROS */
+	char* from = malloc( (strlen(FROM_NUMERICALS) + 1) * sizeof(char) );
+	char* to = malloc( (strlen(TO_NUMERICALS) + 1) * sizeof(char) );
+
+	strcpy(from, FROM_NUMERICALS);
+	strcpy(to, TO_NUMERICALS);
+
+	/* Number variables to be converted */
+	char* number = argv[1];
+
+	/* _first and _last variables */
+	char* from_first = from;
+	char* from_last = from + (strlen(from) - 1);
+
+	char* to_first = to;
+	char* to_last = to + (strlen(to) - 1);
+
+	char* number_first = number;
+	char* number_last = number + (strlen(number) - 1);
+
+	/* initializing counting and result */
+	numeral_ptr* counting = new_digit(NULL, from_first);
+	numeral_ptr* result = new_digit(NULL, to_first);
+
+	/* increments until it finishes */
+	while( !is_the_same(counting, number_first) )
+	{
+		if(DEBUG)
+		{
+			puts("----");
+			print_numeral(result);
+		}
+		increment(result, to_first, to_last);
+
+		if(DEBUG)
+			print_numeral(counting);
+		increment(counting, from_first, from_last);
+	}
+	if(DEBUG)
+		puts("----");
+
+	/* print */
+	if(DEBUG)
+	{
+		printf("counting: ");
+		print_numeral(counting);
+		printf("result: ");
+	}
+	print_numeral(result);
+
+	return EXIT_SUCCESS;
+}