added function abstractName from the API

src/runtime/c/pgf.cxx

@@ -65,3 +65,9 @@ void pgf_free(PgfPGF *pgf)
 {
     delete pgf;
 }
+
+PGF_API
+PgfText *pgf_abstract_name(PgfPGF* pgf)
+{
+	return textdup(&(*pgf->abstract.name));
+}

src/runtime/c/pgf.h

@@ -37,6 +37,12 @@
 
 #endif
 
+/* A generic structure to store text. The last field is variable length */
+typedef struct {
+    size_t size;
+    char text[];
+} PgfText;
+
 typedef struct PgfPGF PgfPGF;
 
 /* All functions that may fail take a reference to a PgfExn structure.

src/runtime/c/text.cxx

@@ -17,3 +17,39 @@ int textcmp(PgfText &t1, PgfText &t2)
         i++;
     }
 }
+
+PGF_INTERNAL
+PgfText* textdup(PgfText *t1)
+{
+    PgfText *t2 = (PgfText *) malloc(sizeof(PgfText) + t1->size + 1);
+    t2->size = t1->size;
+    memcpy(t2->text, t1->text, t1->size+1);
+    return t2;
+}
+
+PGF_API uint32_t
+pgf_utf8_decode(const uint8_t** src_inout)
+{
+	const uint8_t* src = *src_inout;
+	uint8_t c = src[0];
+	if (c < 0x80) {
+		*src_inout = src + 1;
+		return c;
+	}
+	size_t len = (c < 0xe0 ? 1 :
+	              c < 0xf0 ? 2 :
+	              c < 0xf8 ? 3 :
+	              c < 0xfc ? 4 :
+	                         5
+	             );
+	uint64_t mask = 0x0103070F1f7f;
+	uint32_t u = c & (mask >> (len * 8));
+	for (size_t i = 1; i <= len; i++) {
+		c = src[i];
+		u = u << 6 | (c & 0x3f);
+	}
+	*src_inout = &src[len + 1];
+	return u;
+}
+
+

src/runtime/c/text.h

@@ -1,12 +1,13 @@
 #ifndef TEXT_H
 #define TEXT_H
 
-typedef struct {
-    size_t size;
-    char text[];
-} PgfText;
-
 PGF_INTERNAL_DECL
 int textcmp(PgfText &t1, PgfText &t2);
 
+PGF_INTERNAL_DECL
+PgfText* textdup(PgfText *t1);
+
+PGF_API uint32_t
+pgf_utf8_decode(const uint8_t** src_inout);
+
 #endif