1 files changed, 0 insertions, 157 deletions
diff --git a/internal/scfg/reader.go b/internal/scfg/reader.go
deleted file mode 100644
index 6a2bedc..0000000
--- a/internal/scfg/reader.go
+++ /dev/null
@@ -1,157 +0,0 @@
-// SPDX-License-Identifier: MIT
-// SPDX-FileCopyrightText: Copyright (c) 2020 Simon Ser <https://emersion.fr>
-
-package scfg
-
-import (
-	"bufio"
-	"fmt"
-	"io"
-	"os"
-	"strings"
-)
-
-// This limits the max block nesting depth to prevent stack overflows.
-const maxNestingDepth = 1000
-
-// Load loads a configuration file.
-func Load(path string) (Block, error) {
-	f, err := os.Open(path)
-	if err != nil {
-		return nil, err
-	}
-	defer f.Close()
-
-	return Read(f)
-}
-
-// Read parses a configuration file from an io.Reader.
-func Read(r io.Reader) (Block, error) {
-	scanner := bufio.NewScanner(r)
-
-	dec := decoder{scanner: scanner}
-	block, closingBrace, err := dec.readBlock()
-	if err != nil {
-		return nil, err
-	} else if closingBrace {
-		return nil, fmt.Errorf("line %v: unexpected '}'", dec.lineno)
-	}
-
-	return block, scanner.Err()
-}
-
-type decoder struct {
-	scanner    *bufio.Scanner
-	lineno     int
-	blockDepth int
-}
-
-// readBlock reads a block. closingBrace is true if parsing stopped on '}'
-// (otherwise, it stopped on Scanner.Scan).
-func (dec *decoder) readBlock() (block Block, closingBrace bool, err error) {
-	dec.blockDepth++
-	defer func() {
-		dec.blockDepth--
-	}()
-
-	if dec.blockDepth >= maxNestingDepth {
-		return nil, false, fmt.Errorf("exceeded max block depth")
-	}
-
-	for dec.scanner.Scan() {
-		dec.lineno++
-
-		l := dec.scanner.Text()
-		words, err := splitWords(l)
-		if err != nil {
-			return nil, false, fmt.Errorf("line %v: %v", dec.lineno, err)
-		} else if len(words) == 0 {
-			continue
-		}
-
-		if len(words) == 1 && l[len(l)-1] == '}' {
-			closingBrace = true
-			break
-		}
-
-		var d *Directive
-		if words[len(words)-1] == "{" && l[len(l)-1] == '{' {
-			words = words[:len(words)-1]
-
-			var name string
-			params := words
-			if len(words) > 0 {
-				name, params = words[0], words[1:]
-			}
-
-			startLineno := dec.lineno
-			childBlock, childClosingBrace, err := dec.readBlock()
-			if err != nil {
-				return nil, false, err
-			} else if !childClosingBrace {
-				return nil, false, fmt.Errorf("line %v: unterminated block", startLineno)
-			}
-
-			// Allows callers to tell apart "no block" and "empty block"
-			if childBlock == nil {
-				childBlock = Block{}
-			}
-
-			d = &Directive{Name: name, Params: params, Children: childBlock, lineno: dec.lineno}
-		} else {
-			d = &Directive{Name: words[0], Params: words[1:], lineno: dec.lineno}
-		}
-		block = append(block, d)
-	}
-
-	return block, closingBrace, nil
-}
-
-func splitWords(l string) ([]string, error) {
-	var (
-		words   []string
-		sb      strings.Builder
-		escape  bool
-		quote   rune
-		wantWSP bool
-	)
-	for _, ch := range l {
-		switch {
-		case escape:
-			sb.WriteRune(ch)
-			escape = false
-		case wantWSP && (ch != ' ' && ch != '\t'):
-			return words, fmt.Errorf("atom not allowed after quoted string")
-		case ch == '\\':
-			escape = true
-		case quote != 0 && ch == quote:
-			quote = 0
-			wantWSP = true
-			if sb.Len() == 0 {
-				words = append(words, "")
-			}
-		case quote == 0 && len(words) == 0 && sb.Len() == 0 && ch == '#':
-			return nil, nil
-		case quote == 0 && (ch == '\'' || ch == '"'):
-			if sb.Len() > 0 {
-				return words, fmt.Errorf("quoted string not allowed after atom")
-			}
-			quote = ch
-		case quote == 0 && (ch == ' ' || ch == '\t'):
-			if sb.Len() > 0 {
-				words = append(words, sb.String())
-			}
-			sb.Reset()
-			wantWSP = false
-		default:
-			sb.WriteRune(ch)
-		}
-	}
-	if quote != 0 {
-		return words, fmt.Errorf("unterminated quoted string")
-	}
-	if sb.Len() > 0 {
-		words = append(words, sb.String())
-	}
-	return words, nil
-}