[M] Change in coreboot[master]: [WIP] NO REVIEW util/autoport: Use regex for log reading

[Maximilian Brune (Code Review)]

Maximilian Brune has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/74361 )

Change subject: [WIP] NO REVIEW util/autoport: Use regex for log reading
......................................................................

[WIP] NO REVIEW util/autoport: Use regex for log reading

The current implementation doesn't work if there are more
than one PCIE domain used by the System, since lspci changes it's output
depending on whether or not multiple domains are used.

Signed-off-by: Maximilian Brune 
Change-Id: I3daaa1b08ab93ae2b1ebdeba9f2da9dae39b3301
---
M util/autoport/log_reader.go
1 file changed, 43 insertions(+), 17 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/61/74361/1

diff --git a/util/autoport/log_reader.go b/util/autoport/log_reader.go
index b144804..9d9b768 100644
--- a/util/autoport/log_reader.go
+++ b/util/autoport/log_reader.go
@@ -135,33 +135,45 @@
    scanner := bufio.NewScanner(file)

PCIList = []PCIDevData{}
-
+	//                                [domain] :       bus              : dev           . func  desc   vendor      : device
+	pcieLine := regexp.MustCompile(`^([0-9]{4,}:){0,1}([0-9a-z][0-9a-z]):([0-1][0-9a-f]).([0-7]) .+ [([0-9a-z]{4}):([0-9a-z]{4})]`)
+	hexLine := regexp.MustCompile(`^[0-9a-z]{2,}:( [0-9a-z])+`)
    for scanner.Scan() {
    	line := scanner.Text()
+		matches := pcieLine.FindStringSubmatch(line)
    	switch {
-		case !(len(line) < 7 || !isXDigit(line[0]) || !isXDigit(line[1]) || line[2] != ':' || !isXDigit(line[3]) || !isXDigit(line[4]) || line[5] != '.' || !isXDigit(line[6])):
+		case len(matches) == 7:
    		cur := PCIDevData{}
-			fmt.Sscanf(line, "%x:%x.%x", &cur.Bus, &cur.Dev, &cur.Func)
-			lc := strings.LastIndex(line, ":")
-			li := strings.LastIndex(line[0:lc], "[")
-			if li < 0 {
-				continue
+			var b, d, f, di, vi uint64
+			if b, err = strconv.ParseUint(matches[2], 16, 8); err != nil {
+				log.Fatal(err)
    		}
-			ven := 0
-			dev := 0
-			fmt.Sscanf(line[li+1:], "%x:%x", &ven, &dev)
-			cur.PCIDevID = uint16(dev)
-			cur.PCIVenID = uint16(ven)
+			if d, err = strconv.ParseUint(matches[3], 16, 8); err != nil {
+				log.Fatal(err)
+			}
+			if f, err = strconv.ParseUint(matches[4], 16, 4); err != nil {
+				log.Fatal(err)
+			}
+			if di,err = strconv.ParseUint(matches[5], 16, 16); err != nil {
+				log.Fatal(err)
+			}
+			if vi,err = strconv.ParseUint(matches[6], 16, 16); err != nil {
+				log.Fatal(err)
+			}
+			cur.Bus      = int(b)
+			cur.Dev      = int(d)
+			cur.Func     = int(f)
+			cur.PCIDevID = uint16(di)
+			cur.PCIVenID = uint16(vi)
+			fmt.Printf("%2x:%2x.%1x %4x:%4x\n", cur.Bus, cur.Dev, cur.Func, cur.PCIDevID, cur.PCIVenID)
    		cur.ConfigDump = make([]byte, 0x100, 0x1000)
    		PCIList = append(PCIList, cur)
-		case len(line) > 7 && isXDigit(line[0]) && line[1] == '0' && line[2] == ':':
-			start := 0
-			fmt.Sscanf(line, "%x:", &start)
+		case hexLine.MatchString(line):
    		cur := &PCIList[len(PCIList)-1]
    		cur.ConfigDump = l.AssignHexLine(line, cur.ConfigDump)
    	}
    }
-
+	fmt.Println()
    if err := scanner.Err(); err != nil {
    	log.Fatal(err)
    }
@@ -271,7 +283,7 @@
    	}
    	defer codec.Close()
    	pin, err := os.Open(l.InputDirectory + "/pin_hwC" + strconv.Itoa(cardno) +
-			"D" + strconv.Itoa(codecno))
+		"D" + strconv.Itoa(codecno))
    	if err != nil {
    		continue
    	}