separator module (#1)

first module which uses the config :-)

Co-authored-by: krizej <60076189+krizej@users.noreply.github.com>
Reviewed-on: jacekpoz/modfetch#1
Co-authored-by: krizej <krizej@protonmail.com>
Co-committed-by: krizej <krizej@protonmail.com>

modules/sep.c

@@ -0,0 +1,66 @@
+/* SEP - separator module for modfetch
+ *
+ * options: <type> name (default value)
+ *   <number> sep  (8)        specifies how long the separator should be
+ *   <string> char (-)        specifies the character (or string) to use for the separator
+ *
+ * author: krizej
+ * 09 Feb 2024
+ */
+
+#include "../mod.h"
+#include <string.h>
+#include <stdlib.h>
+
+uint8_t version_major(void) { return 1; }
+uint8_t version_minor(void) { return 0; }
+uint8_t version_patch(void) { return 0; }
+const char *module_name(void) { return "sep"; }
+
+static size_t length = 8;
+static char *sep_char = "-";
+static size_t sep_char_length = 1;
+
+void init(char **config) {
+    for (char *opt = *config; opt != NULL; opt = *++config) {
+        if (strncmp(opt, "sep", 3) == 0) {
+            char *valstr = opt + 4; // skip 'sep='
+            long value = strtol(valstr, NULL, 10);
+
+            if (value >= 0) {
+                length = (size_t) value;
+            }
+        } else if (strncmp(opt, "char", 4) == 0) {
+            char *value = opt + 5; // skip 'char='
+
+            if (*value != 0) { // todo: see if there are any more characters that should be rejected
+                sep_char_length = strlen(value);
+                sep_char = malloc((sep_char_length + 1) * sizeof(char));
+                strncpy(sep_char, value, sep_char_length);
+                sep_char[sep_char_length] = '\0';
+            } else {
+                sep_char = NULL;
+            }
+        }
+    }
+}
+
+const char *get(void) {
+    char *ret;
+
+    if (sep_char == NULL) {
+        ret = malloc(1 * sizeof(char));
+        *ret = 0;
+        return ret;
+    }
+
+    ret = malloc((length * sep_char_length + 1) * sizeof(char));
+    memset(ret, 0, length * sep_char_length + 1);
+
+    for (size_t i = 0; i < length; i++)
+        strncat(ret, sep_char, sep_char_length);
+
+    ret[length * sep_char_length] = '\0'; // just to be sure :-D
+
+    return ret;
+}