first commit

1 files changed, 80 insertions, 0 deletions

diff --git a/deb822/parse.go b/deb822/parse.go
new file mode 100644
index 0000000..a8a02e6
--- /dev/null
+++ b/deb822/parse.go
@@ -0,0 +1,80 @@
+package deb822
+
+import (
+	"bufio"
+	"fmt"
+	"strings"
+)
+
+/*ParseStream parses a stream and returns an array of maps, where
+/* each map contains all the fields of an RFC822 stanza */
+func ParseStream(stream *bufio.Scanner) (Stanzas, int) {
+
+	s := make(Stanzas, 10)
+	curSize := 10
+	for i := 0; i < 10; i++ {
+		s[i] = make(map[string]string)
+	}
+	curStanza := 0
+	curField := ""
+	for stream.Scan() {
+		if strings.TrimSpace(stream.Text()) == "" {
+			if curField == "" {
+				continue
+			}
+			curStanza++
+			curField = ""
+			fmt.Printf("==== New stanza ==== (Nr. %d/%d)\n", curStanza, curSize)
+			if curStanza >= curSize {
+				newS := make(Stanzas, curSize*2)
+				for i := curSize; i < curSize*2; i++ {
+					newS[i] = make(map[string]string)
+				}
+				curSize *= 2
+				copy(newS, s)
+				s = newS
+			}
+			continue
+		}
+
+		//fmt.Printf("line: %s\n", stream.Text())
+		field := strings.SplitN(stream.Text(), ":", 2)
+		//fmt.Printf("field: %s\n", field)
+		if len(field) > 1 {
+			/* This is a new field*/
+			curField = field[0]
+			s[curStanza][curField] = strings.TrimSpace(field[1])
+		} else {
+			/* this is the continuation of the last field */
+			s[curStanza][curField] += "\n" + field[0]
+		}
+	}
+	return s, curStanza
+}
+
+/*ScanStanza reads a single RFC822 stanza from a stream and returns
+/* it as a map */
+func ScanStanza(stream *bufio.Scanner) (Stanza, error) {
+
+	s := make(Stanza)
+
+	curField := ""
+	for stream.Scan() {
+		if strings.TrimSpace(stream.Text()) == "" {
+			return s, nil
+		}
+
+		field := strings.SplitN(stream.Text(), ":", 2)
+		if len(field) > 1 {
+			/* This is a new field*/
+			curField = field[0]
+			s[curField] = strings.TrimSpace(field[1])
+		} else {
+			/* this is the continuation of the last field */
+			s[curField] += "\n" + field[0]
+		}
+	}
+
+	err := stream.Err()
+	return s, err
+}