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cover: add function to parse profiles from an io.Reader 

Fixes golang/go#19404

Change-Id: I893fbb999bb8d0a6c62ab8752790fce75912be0c
GitHub-Last-Rev: 101a2f5bd6e2c2e278deafc8238fa4319a697541
GitHub-Pull-Request: golang/tools#331
Reviewed-on: https://go-review.googlesource.com/c/tools/+/336329
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Michael Knyszek <mknyszek@google.com>
This commit is contained in:
6543 2021-09-29 20:57:24 +00:00 committed by Ian Lance Taylor
parent 36e7bf96e1
commit 81efdbcac4
1 changed files with 8 additions and 3 deletions
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11
cover/profile.go
View File

@ -10,6 +10,7 @@ import (
"bufio"
"errors"
"fmt"
"io"
"math"
"os"
"sort"
@ -45,14 +46,18 @@ func ParseProfiles(fileName string) ([]*Profile, error) {
return nil, err
}
defer pf.Close()
return ParseProfilesFromReader(pf)
}
files := make(map[string]*Profile)
buf := bufio.NewReader(pf)
// ParseProfilesFromReader parses profile data from the Reader and
// returns a Profile for each source file described therein.
func ParseProfilesFromReader(rd io.Reader) ([]*Profile, error) {
// First line is "mode: foo", where foo is "set", "count", or "atomic".
// Rest of file is in the format
// encoding/base64/base64.go:34.44,37.40 3 1
// where the fields are: name.go:line.column,line.column numberOfStatements count
s := bufio.NewScanner(buf)
files := make(map[string]*Profile)
s := bufio.NewScanner(rd)
mode := ""
for s.Scan() {
line := s.Text()