From c07d582e2476db075252998388305f11302a8b23 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Tue, 7 Jun 2022 10:02:19 +0000
Subject: Expand arguments to some commands where it makes sense, GitHub issue
 3204 from Anindya Mukherjee.

---
 arguments.c | 102 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)

(limited to 'arguments.c')

diff --git a/arguments.c b/arguments.c
index c94a3a29..485af2be 100644
--- a/arguments.c
+++ b/arguments.c
@@ -848,6 +848,41 @@ args_strtonum(struct args *args, u_char flag, long long minval,
 	return (ll);
 }
 
+/* Convert an argument value to a number, and expand formats. */
+long long
+args_strtonum_and_expand(struct args *args, u_char flag, long long minval,
+    long long maxval, struct cmdq_item *item, char **cause)
+{
+	const char		*errstr;
+	char			*formatted;
+	long long		 ll;
+	struct args_entry	*entry;
+	struct args_value	*value;
+
+	if ((entry = args_find(args, flag)) == NULL) {
+		*cause = xstrdup("missing");
+		return (0);
+	}
+	value = TAILQ_LAST(&entry->values, args_values);
+	if (value == NULL ||
+	    value->type != ARGS_STRING ||
+	    value->string == NULL) {
+		*cause = xstrdup("missing");
+		return (0);
+	}
+
+	formatted = format_single_from_target(item, value->string);
+	ll = strtonum(formatted, minval, maxval, &errstr);
+	free(formatted);
+	if (errstr != NULL) {
+		*cause = xstrdup(errstr);
+		return (0);
+	}
+
+	*cause = NULL;
+	return (ll);
+}
+
 /* Convert an argument to a number which may be a percentage. */
 long long
 args_percentage(struct args *args, u_char flag, long long minval,
@@ -904,3 +939,70 @@ args_string_percentage(const char *value, long long minval, long long maxval,
 	*cause = NULL;
 	return (ll);
 }
+
+/*
+ * Convert an argument to a number which may be a percentage, and expand
+ * formats.
+ */
+long long
+args_percentage_and_expand(struct args *args, u_char flag, long long minval,
+    long long maxval, long long curval, struct cmdq_item *item, char **cause)
+{
+	const char		*value;
+	struct args_entry	*entry;
+
+	if ((entry = args_find(args, flag)) == NULL) {
+		*cause = xstrdup("missing");
+		return (0);
+	}
+	value = TAILQ_LAST(&entry->values, args_values)->string;
+	return (args_string_percentage_and_expand(value, minval, maxval, curval,
+		    item, cause));
+}
+
+/*
+ * Convert a string to a number which may be a percentage, and expand formats.
+ */
+long long
+args_string_percentage_and_expand(const char *value, long long minval,
+    long long maxval, long long curval, struct cmdq_item *item, char **cause)
+{
+	const char	*errstr;
+	long long	 ll;
+	size_t		 valuelen = strlen(value);
+	char		*copy, *f;
+
+	if (value[valuelen - 1] == '%') {
+		copy = xstrdup(value);
+		copy[valuelen - 1] = '\0';
+
+		f = format_single_from_target(item, copy);
+		ll = strtonum(f, 0, 100, &errstr);
+		free(f);
+		free(copy);
+		if (errstr != NULL) {
+			*cause = xstrdup(errstr);
+			return (0);
+		}
+		ll = (curval * ll) / 100;
+		if (ll < minval) {
+			*cause = xstrdup("too small");
+			return (0);
+		}
+		if (ll > maxval) {
+			*cause = xstrdup("too large");
+			return (0);
+		}
+	} else {
+		f = format_single_from_target(item, value);
+		ll = strtonum(f, minval, maxval, &errstr);
+		free(f);
+		if (errstr != NULL) {
+			*cause = xstrdup(errstr);
+			return (0);
+		}
+	}
+
+	*cause = NULL;
+	return (ll);
+}
-- 
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