fix wrong git ignore

internal/pdf/core/symbols.go

@@ -0,0 +1,74 @@
+package core
+
+// IsWhiteSpace checks if byte represents a white space character.
+// TODO (v3): Unexport.
+func IsWhiteSpace(ch byte) bool {
+	// Table 1 white-space characters (7.2.2 Character Set)
+	// spaceCharacters := string([]byte{0x00, 0x09, 0x0A, 0x0C, 0x0D, 0x20})
+	if (ch == 0x00) || (ch == 0x09) || (ch == 0x0A) || (ch == 0x0C) || (ch == 0x0D) || (ch == 0x20) {
+		return true
+	}
+	return false
+}
+
+// IsFloatDigit checks if a character can be a part of a float number string.
+// TODO (v3): Unexport.
+func IsFloatDigit(c byte) bool {
+	return ('0' <= c && c <= '9') || c == '.'
+}
+
+// IsDecimalDigit checks if the character is a part of a decimal number string.
+// TODO (v3): Unexport.
+func IsDecimalDigit(c byte) bool {
+	if c >= '0' && c <= '9' {
+		return true
+	} else {
+		return false
+	}
+}
+
+// IsOctalDigit checks if a character can be part of an octal digit string.
+// TODO (v3): Unexport.
+func IsOctalDigit(c byte) bool {
+	if c >= '0' && c <= '7' {
+		return true
+	} else {
+		return false
+	}
+}
+
+// IsPrintable checks if a character is printable.
+// Regular characters that are outside the range EXCLAMATION MARK(21h)
+// (!) to TILDE (7Eh) (~) should be written using the hexadecimal notation.
+// TODO (v3): Unexport.
+func IsPrintable(char byte) bool {
+	if char < 0x21 || char > 0x7E {
+		return false
+	}
+	return true
+}
+
+// IsDelimiter checks if a character represents a delimiter.
+// TODO (v3): Unexport.
+func IsDelimiter(char byte) bool {
+	if char == '(' || char == ')' {
+		return true
+	}
+	if char == '<' || char == '>' {
+		return true
+	}
+	if char == '[' || char == ']' {
+		return true
+	}
+	if char == '{' || char == '}' {
+		return true
+	}
+	if char == '/' {
+		return true
+	}
+	if char == '%' {
+		return true
+	}
+
+	return false
+}