From e3a6bc8502a0366aee9040e938789a6016e2fa4a Mon Sep 17 00:00:00 2001
From: Paul Duncan <pabs@pablotron.org>
Date: Wed, 2 Feb 2022 21:45:23 -0500
Subject: internal/cpe: add token.go, part.go, and tests

---
 internal/cpe/cpe.go | 89 -----------------------------------------------------
 1 file changed, 89 deletions(-)

(limited to 'internal/cpe/cpe.go')

diff --git a/internal/cpe/cpe.go b/internal/cpe/cpe.go
index 73930e8..331f315 100644
--- a/internal/cpe/cpe.go
+++ b/internal/cpe/cpe.go
@@ -3,92 +3,3 @@
 // Source: NISTIR 7605, figure 6-3:
 // https://nvlpubs.nist.gov/nistpubs/Legacy/IR/nistir7695.pdf
 package cpe
-
-import (
-  "fmt"
-)
-
-//go:generate stringer -linecomment -type=tokenType
-
-// token type
-type tokenType byte
-
-const (
-  anyToken tokenType = iota // any
-  naToken // na
-  valToken // val
-)
-
-// token
-type token struct {
-  Type tokenType // token type
-  Val string // token value
-}
-
-// parse buffer into token.
-func newToken(val []byte) token {
-  if len(val) > 0 {
-    switch val[0] {
-    case '*':
-      return token { Type: anyToken }
-    case '-':
-      return token { Type: naToken }
-    default:
-      return token { Type: valToken, Val: string(val) }
-    }
-  } else {
-    // empty value
-    return token { Type: valToken, Val: "" }
-  }
-}
-
-// Parse buffer into slice of tokens.
-func tokenize(buf []byte) ([]token, error) {
-  // build result
-  var r []token
-
-  // current token and escape state
-  var curr []byte
-  esc := false
-
-  // build result
-  for _, b := range(buf) {
-    if esc {
-      switch b {
-      // valid escaped characters
-      case '\\', '*', '-', '!', '"', '#', '$', '%', '&', '\'', '(', ')',
-           '+', ',', '/', ':', ';', '<', '=', '>', '@', '[', ']', '^', '`',
-           '{', '|', '}', '~':
-        curr = append(curr, b)
-        esc = false
-      default:
-        return r, fmt.Errorf("invalid escape byte: 0x%02x", b)
-      }
-    } else {
-      switch b {
-      case '\\':
-        esc = true
-      case ':':
-        // push token, clear buffer
-        r = append(r, newToken(curr))
-        curr = nil
-      case 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',
-           'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x',
-           'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
-           '-', '.', '_', '*', '?':
-        curr = append(curr, b)
-      default:
-        return r, fmt.Errorf("invalid byte: 0x%02x", b)
-      }
-    }
-  }
-
-  if len(curr) > 0 {
-    // push token, clear buffer
-    r = append(r, newToken(curr))
-    curr = nil
-  }
-
-  // return success
-  return r, nil
-}
-- 
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