fix wrong git ignore

internal/pdf/core/io.go

@@ -0,0 +1,44 @@
+package core
+
+import (
+	"bufio"
+	"errors"
+	"os"
+
+	"gitea.tecamino.com/paadi/pdfmerge/internal/pdf/common"
+)
+
+// ReadAtLeast reads at least n bytes into slice p.
+// Returns the number of bytes read (should always be == n), and an error on failure.
+// TODO (v3): Unexport.
+func (parser *PdfParser) ReadAtLeast(p []byte, n int) (int, error) {
+	remaining := n
+	start := 0
+	numRounds := 0
+	for remaining > 0 {
+		nRead, err := parser.reader.Read(p[start:])
+		if err != nil {
+			common.Log.Debug("error Failed reading (%d;%d) %s", nRead, numRounds, err.Error())
+			return start, errors.New("failed reading")
+		}
+		numRounds++
+		start += nRead
+		remaining -= nRead
+	}
+	return start, nil
+}
+
+// Get the current file offset, accounting for buffered position.
+// TODO (v3): Unexport.
+func (parser *PdfParser) GetFileOffset() int64 {
+	offset, _ := parser.rs.Seek(0, os.SEEK_CUR)
+	offset -= int64(parser.reader.Buffered())
+	return offset
+}
+
+// Seek the file to an offset position.
+// TODO (v3): Unexport.
+func (parser *PdfParser) SetFileOffset(offset int64) {
+	parser.rs.Seek(offset, os.SEEK_SET)
+	parser.reader = bufio.NewReader(parser.rs)
+}