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lcov.go
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lcov.go
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package main
import (
"bufio"
"fmt"
"os"
"strconv"
)
func loadLCovFile(fds FileDataSet, file *os.File) error {
currentData := (*FileData)(nil)
scanner := bufio.NewScanner(file)
for scanner.Scan() {
t, value := recordType(scanner.Text())
switch t {
case "TN": // Title
// ignore
case "SF": // Source file
currentData = fds.FileData(value)
case "FN": // Function
funcName, funcStart, err := parseFNRecord(value)
if err != nil {
return err
}
currentData.AppendFunctionData(funcName, funcStart, 0)
case "FNDA": // Function data
funcName, hitCount, err := parseFNDARecord(value)
if err != nil {
return err
}
currentData.AppendFunctionData(funcName, 0, hitCount)
case "DA": // Line data
lineNo, hitCount, err := parseDARecord(value)
if err != nil {
return err
}
currentData.AppendLineCountData(lineNo, hitCount)
case "BRDA": // Branch data
lineNo, branchStatus, err := parseBRDARecord(value)
if err != nil {
return err
}
currentData.AppendBranchData(lineNo, branchStatus)
default:
// Unknown records are ignored. If future versions of the file
// format introduce new records, we don't want to have an error.
//
// We are also skipping known records:
// LF lines found
// LH lines hit
// FNF functions found
// FNH functions hit
// BRF branches found
// BRH branches hit
//
// The above records provides summaries of the counts in the data
// records, but we will calculate that ourselves.
}
}
return scanner.Err()
}
func parseDARecord(value string) (lineNo int, hitCount uint64, err error) {
buffer := [4]string{}
values := splitOnComma(buffer[:], value)
if l := len(values); l != 2 {
return 0, 0, fmt.Errorf("can't parse DA record")
}
lineNoTmp, err := strconv.ParseInt(values[0], 10, 64)
if err != nil {
return 0, 0, fmt.Errorf("can't parse DA record: %s", err)
}
lineNo = int(lineNoTmp)
hitCount, err = strconv.ParseUint(values[1], 10, 64)
if err != nil {
return 0, 0, fmt.Errorf("can't parse DA record: %s", err)
}
return lineNo, hitCount, nil
}
func parseFNRecord(value string) (funcName string, funcStart int, err error) {
buffer := [4]string{}
values := splitOnComma(buffer[:], value)
if len(values) != 2 {
return "", 0, fmt.Errorf("can't parse function record")
}
line, err := strconv.ParseInt(values[0], 10, 64)
if err != nil {
return "", 0, fmt.Errorf("can't parse function record: %s", err)
}
funcName = values[1]
return funcName, int(line), nil
}
func parseFNDARecord(value string) (funcName string, hitCount uint64, err error) {
buffer := [4]string{}
values := splitOnComma(buffer[:], value)
if len(values) != 2 {
return "", 0, fmt.Errorf("can't parse function data record")
}
hitCount, err = strconv.ParseUint(values[0], 10, 64)
if err != nil {
return "", 0, fmt.Errorf("can't parse function data record: %s", err)
}
funcName = values[1]
return funcName, hitCount, nil
}
func parseBRDARecord(value string) (lineNo int, status BranchStatus, err error) {
buffer := [4]string{}
values := splitOnComma(buffer[:], value)
if len(values) != 4 {
return 0, 0, fmt.Errorf("can't parse branch record")
}
lineNoTmp, err := strconv.ParseInt(values[0], 10, 64)
if err != nil {
return 0, 0, fmt.Errorf("can't parse branch record: %s", err)
}
lineNo = int(lineNoTmp)
hitCount, err := strconv.ParseInt(values[3], 10, 64)
if err != nil {
return 0, 0, fmt.Errorf("can't parse branch record: %s", err)
}
if hitCount > 0 {
return lineNo, BranchTaken, nil
}
return lineNo, BranchNotTaken, nil
}