1 files changed, 47 insertions, 0 deletions
diff --git a/src/pdf_doc.c b/src/pdf_doc.c
new file mode 100644
index 0000000..9b92bd0
--- /dev/null
+++ b/src/pdf_doc.c
@@ -0,0 +1,47 @@
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#include "nspdferror.h"
+#include "byte_class.h"
+#include "cos_object.h"
+#include "pdf_doc.h"
+
+/**
+ * move offset to next non whitespace byte
+ */
+int doc_skip_ws(struct pdf_doc *doc, uint64_t *offset)
+{
+    uint8_t c;
+    /* TODO sort out keeping offset in range */
+    c = DOC_BYTE(doc, *offset);
+    while ((bclass[c] & (BC_WSPC | BC_CMNT) ) != 0) {
+        (*offset)++;
+        /* skip comments */
+        if ((bclass[c] & BC_CMNT) != 0) {
+            c = DOC_BYTE(doc, *offset);
+            while ((bclass[c] & BC_EOLM ) == 0) {
+                (*offset)++;
+                c = DOC_BYTE(doc, *offset);
+            }
+        }
+        c = DOC_BYTE(doc, *offset);
+    }
+    return 0;
+}
+
+/**
+ * move offset to next non eol byte
+ */
+int doc_skip_eol(struct pdf_doc *doc, uint64_t *offset)
+{
+    uint8_t c;
+    /* TODO sort out keeping offset in range */
+    c = DOC_BYTE(doc, *offset);
+    while ((bclass[c] & BC_EOLM) != 0) {
+        (*offset)++;
+        c = DOC_BYTE(doc, *offset);
+    }
+    return 0;
+}