make: added utilitary function to generate filenames

1 files changed, 61 insertions, 0 deletions

diff --git a/src/blogc-make/utils.c b/src/blogc-make/utils.c
new file mode 100644
index 0000000..b1ff7e1
--- /dev/null
+++ b/src/blogc-make/utils.c
@@ -0,0 +1,61 @@
+/*
+ * blogc: A blog compiler.
+ * Copyright (C) 2014-2017 Rafael G. Martins <rafael@rafaelmartins.eng.br>
+ *
+ * This program can be distributed under the terms of the BSD License.
+ * See the file LICENSE.
+ */
+
+#include <stdbool.h>
+#include <string.h>
+#include "../common/utils.h"
+
+
+char*
+bm_generate_filename(const char *dir, const char *prefix, const char *fname,
+    const char *ext)
+{
+    bool have_prefix = prefix != NULL && prefix[0] != '\0';
+    bool have_fname = fname != NULL && fname[0] != '\0';
+    bool have_ext = ext != NULL && ext[0] != '\0';
+    bool have_ext_noslash = have_ext && ext[0] != '/';
+    bool is_index = have_fname && have_ext && (
+        (0 == strcmp(fname, "index")) && ext[0] == '/');
+
+    bc_string_t *rv = bc_string_new();
+
+    if (dir != NULL && (have_prefix || have_fname || have_ext))
+        bc_string_append(rv, dir);
+
+    if ((have_prefix || have_fname || have_ext_noslash) && !is_index)
+        bc_string_append_c(rv, '/');
+
+    if (have_prefix)
+        bc_string_append(rv, prefix);
+
+    // with fname we have posts, pages and tags
+    if (have_fname) {
+        if (have_prefix && have_fname && fname[0] != '/')
+            bc_string_append_c(rv, '/');
+        if (!is_index)
+            bc_string_append(rv, fname);
+    }
+
+    // no fname means index
+    else if (have_ext_noslash) {
+        if (have_fname)
+            bc_string_append_c(rv, '/');
+        if (!have_prefix)
+            bc_string_append(rv, "index");
+    }
+
+    if (have_ext)
+        bc_string_append(rv, ext);
+
+    if (rv->len == 0) {
+        bc_string_free(rv, true);
+        return NULL;
+    }
+
+    return bc_string_free(rv, false);
+}