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-rw-r--r--util.c38
-rw-r--r--util.h2
2 files changed, 40 insertions, 0 deletions
diff --git a/util.c b/util.c
index c07589e..0e5825a 100644
--- a/util.c
+++ b/util.c
@@ -1,5 +1,6 @@
#include <limits.h>
#include <stdio.h>
+#include <string.h>
#include <unistd.h>
#include "util.h"
@@ -20,3 +21,40 @@ unsigned get_ncpus(void)
return n == 0 ? 1 : n;
}
+
+
+static void query(const char *prompt, const char *def, char *buf, int len)
+{
+ buf[0] = '\0';
+
+ printf("%s [%s]: ", prompt, def);
+ fflush(stdout);
+
+ fgets(buf, len, stdin);
+ if (buf[0] == '\0' || buf[0] == '\n') {
+ snprintf(buf, len, "%s", def);
+ } else if(strchr(buf, '\n')) {
+ *strchr(buf, '\n') = '\0';
+ }
+}
+
+
+void ask_string(char *buf, int len, const char *prompt, const char *def)
+{
+ query(prompt, def, buf, len);
+}
+
+
+void ask_num(int *res, int max, const char *prompt, int def)
+{
+ char buf[21], buf2[256];
+ int num;
+
+ snprintf(buf, sizeof(buf), "%i", def);
+ do {
+ query(prompt, buf, buf2, sizeof(buf2));
+ num = atoi(buf2); /* TODO: errors (strtol)*/
+ } while (num > max);
+
+ *res = num;
+}
diff --git a/util.h b/util.h
index c82b623..549b529 100644
--- a/util.h
+++ b/util.h
@@ -22,5 +22,7 @@
(sizeof(_str) - 1)
unsigned get_ncpus(void);
+void ask_string(char *buf, int len, const char *prompt, const char *def);
+void ask_num(int *res, int max, const char *prompt, int def);
#endif /* _UTIL_H */
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