Properly toggle boolean flag values

Makefile

@@ -1,6 +1,6 @@
 CFLAGS ?= -Wall -Wextra -g -O1 -fpic
 LDFLAGS ?= -g -O1 -shared
-GARGOYLE_OBJS := gargoyle sleuth twine
+GARGOYLE_OBJS := gargoyle sleuth twine scribe
 
 .PHONY: all gargoyle init docs test clean
 

include/gargoyle.h

@@ -2,6 +2,7 @@
 #define __GARGOYLE_H_
 
 #include <gargoyle/codex.h>
+#include <gargoyle/scribe.h>
 #include <gargoyle/sleuth.h>
 #include <stdint.h>
 

include/gargoyle/codex.h

@@ -11,5 +11,6 @@ static const uint8_t GARGOYLE_TYPE_DBLE = 1 << 4;
 
 static const uint8_t GARGOYLE_ERR_SUCCESS = 0;
 static const uint8_t GARGOYLE_ERR_UNKNOWN_OPT = 1;
+static const uint8_t GARGOYLE_ERR_VALUE_REQUIRED = 2;
 
 #endif

include/gargoyle/scribe.h

@@ -0,0 +1,10 @@
+#ifndef __GARGOYLE_SCRIBE_H_
+#define __GARGOYLE_SCRIBE_H_
+
+#include <gargoyle/sleuth.h>
+#include <stdint.h>
+
+uint8_t gargoyle_from_bool(struct gargoyle_opt *opt, const char *brand);
+uint8_t gargoyle_from_rope(struct gargoyle_opt *opt, const char *brand);
+
+#endif

src/gargoyle.c

@@ -21,11 +21,32 @@ uint8_t gargoyle_digest_args(uint16_t optc, struct gargoyle_opt *optv, int *argc
     struct gargoyle_opt *opt = NULL;
 
     if(*(arg + 1) == '-') {
-      opt = gargoyle_find_brand(optc, optv, arg + 2);
+      const char *brand = arg + 2;
+      opt = gargoyle_find_brand(optc, optv, brand);
 
       if(!opt) {
         return GARGOYLE_ERR_UNKNOWN_OPT;
       }
+
+      uint8_t res = 0;
+
+      if(opt->type & GARGOYLE_TYPE_BOOL) {
+        res = gargoyle_from_bool(opt, brand);
+      } else if(*(brand + opt->brand_sz) == '=') {
+        res = gargoyle_from_rope(opt, brand + opt->brand_sz);
+      } else {
+        if(!(*argv + 1)) {
+          return GARGOYLE_ERR_VALUE_REQUIRED;
+        }
+
+        *argc -= 1;
+        *argv += 1;
+        res = gargoyle_from_rope(opt, **argv);
+      }
+
+      if(res) {
+        return res;
+      }
     } else {
       const char *idx = arg + 1;
 

src/scribe.c

@@ -0,0 +1,16 @@
+#include <gargoyle/codex.h>
+#include <gargoyle/scribe.h>
+#include <gargoyle/twine.h>
+
+uint8_t gargoyle_from_bool(struct gargoyle_opt *opt, const char *brand) {
+  if(opt->val) {
+    uint8_t *val = opt->val;
+    *val = !gargoyle_cmp(brand, "no-", 3, GARGOYLE_CMP_ICASE);
+  }
+
+  return 0;
+}
+
+uint8_t gargoyle_from_rope(struct gargoyle_opt *opt, const char *brand) {
+  return 0;
+}