First version of automatic ID and COUNT columns, to discuss (for now,

columns created when NUC_SEQ views are closed if the columns don't
already exist)

src/utils.c

@@ -18,6 +18,7 @@
 #include <dirent.h>
 #include <unistd.h>
 #include <time.h>
+#include <math.h>
 
 #include "utils.h"
 #include "obidebug.h"
@@ -35,6 +36,43 @@
  **********************************************************************/
 
 
+int digit_count(index_t i)
+{
+	int n_digits;
+
+	if (i == 0)
+		n_digits = 1;
+	else
+		n_digits = floor(log10(llabs(i))) + 1;
+
+	return n_digits;
+}
+
+
+char* build_word_with_idx(const char* prefix, index_t idx)
+{
+	char* word;
+	int   n_digits;
+
+	n_digits = digit_count(idx);
+	word = (char*) malloc((strlen(prefix) + 1+ n_digits + 1)*sizeof(char));
+	if (word == NULL)
+	{
+		obi_set_errno(OBI_MALLOC_ERROR);
+		obidebug(1, "\nError allocating memory for a character string");
+		return NULL;
+	}
+	if (sprintf(word, "%s_%lld", prefix, idx) < 0)
+	{
+		obi_set_errno(OBI_UTILS_ERROR);
+		obidebug(1, "\nProblem building a word from a prefix and an index");
+		return NULL;
+	}
+
+	return word;
+}
+
+
 int count_dir(char* dir_path)
 {
 	struct dirent* dp;