Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 1 | package main |
| 2 | |
Fumitoshi Ukai | 0aa4fc4 | 2015-04-10 17:00:19 +0900 | [diff] [blame] | 3 | //go:generate go run testcase/gen_testcase_parse_benchmark.go |
| 4 | // |
| 5 | // $ go generate |
| 6 | // $ go test -bench . |
| 7 | |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 8 | import ( |
| 9 | "bufio" |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 10 | "bytes" |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 11 | "errors" |
Fumitoshi Ukai | f8efa0a | 2015-03-30 18:10:11 +0900 | [diff] [blame] | 12 | "fmt" |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 13 | "io" |
| 14 | "os" |
Shinichiro Hamaji | d7bef60 | 2015-03-30 19:55:32 +0900 | [diff] [blame] | 15 | "strings" |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 16 | ) |
| 17 | |
| 18 | type Makefile struct { |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 19 | filename string |
| 20 | stmts []AST |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 21 | } |
| 22 | |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 23 | type ifState struct { |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 24 | ast *IfAST |
| 25 | inElse bool |
| 26 | numNest int |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 27 | } |
| 28 | |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 29 | type parser struct { |
Shinichiro Hamaji | 370be72 | 2015-04-10 14:55:23 +0900 | [diff] [blame] | 30 | rd *bufio.Reader |
| 31 | mk Makefile |
| 32 | lineno int |
| 33 | elineno int // lineno == elineno unless there is trailing '\'. |
| 34 | linenoFixed bool |
| 35 | unBuf []byte |
| 36 | hasUnBuf bool |
| 37 | done bool |
| 38 | outStmts *[]AST |
| 39 | ifStack []ifState |
| 40 | inDef []string |
| 41 | numIfNest int |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 42 | } |
| 43 | |
| 44 | func exists(filename string) bool { |
| 45 | f, err := os.Open(filename) |
| 46 | if err != nil { |
| 47 | return false |
| 48 | } |
| 49 | f.Close() |
| 50 | return true |
| 51 | } |
| 52 | |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 53 | func newParser(rd io.Reader, filename string) *parser { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 54 | p := &parser{ |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 55 | rd: bufio.NewReader(rd), |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 56 | } |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 57 | p.mk.filename = filename |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 58 | p.outStmts = &p.mk.stmts |
| 59 | return p |
| 60 | } |
| 61 | |
Shinichiro Hamaji | ae32b78 | 2015-03-31 14:41:19 +0900 | [diff] [blame] | 62 | func (p *parser) addStatement(ast AST) { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 63 | *p.outStmts = append(*p.outStmts, ast) |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 64 | } |
| 65 | |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 66 | func (p *parser) readLine() []byte { |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 67 | if p.hasUnBuf { |
| 68 | p.hasUnBuf = false |
| 69 | return p.unBuf |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 70 | } |
| 71 | |
Shinichiro Hamaji | 370be72 | 2015-04-10 14:55:23 +0900 | [diff] [blame] | 72 | if !p.linenoFixed { |
| 73 | p.lineno = p.elineno |
| 74 | } |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 75 | line, err := p.rd.ReadBytes('\n') |
Shinichiro Hamaji | 370be72 | 2015-04-10 14:55:23 +0900 | [diff] [blame] | 76 | if !p.linenoFixed { |
| 77 | p.lineno++ |
| 78 | p.elineno = p.lineno |
| 79 | } |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 80 | if err == io.EOF { |
| 81 | p.done = true |
| 82 | } else if err != nil { |
| 83 | panic(err) |
| 84 | } |
| 85 | |
Shinichiro Hamaji | 56c868c | 2015-04-09 10:17:10 +0900 | [diff] [blame] | 86 | line = bytes.TrimRight(line, "\r\n") |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 87 | |
Shinichiro Hamaji | 52e83aa | 2015-04-06 17:20:28 +0900 | [diff] [blame] | 88 | return line |
| 89 | } |
| 90 | |
| 91 | func removeComment(line []byte) []byte { |
| 92 | var parenStack []byte |
| 93 | for i, ch := range line { |
| 94 | switch ch { |
| 95 | case '(', '{': |
| 96 | parenStack = append(parenStack, ch) |
| 97 | case ')', '}': |
| 98 | if len(parenStack) > 0 { |
| 99 | parenStack = parenStack[:len(parenStack)-1] |
| 100 | } |
| 101 | case '#': |
| 102 | if len(parenStack) == 0 { |
| 103 | return line[:i] |
| 104 | } |
| 105 | } |
| 106 | } |
| 107 | return line |
| 108 | } |
| 109 | |
Shinichiro Hamaji | 0b93c86 | 2015-04-07 06:15:15 +0900 | [diff] [blame] | 110 | func (p *parser) processMakefileLine(line []byte) []byte { |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 111 | // TODO: Handle \\ at the end of the line? |
| 112 | for len(line) > 0 && line[len(line)-1] == '\\' { |
| 113 | line = line[:len(line)-1] |
Shinichiro Hamaji | 3e4533d | 2015-04-06 14:03:58 +0900 | [diff] [blame] | 114 | lineno := p.lineno |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 115 | nline := p.readLine() |
Shinichiro Hamaji | 3e4533d | 2015-04-06 14:03:58 +0900 | [diff] [blame] | 116 | p.lineno = lineno |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 117 | line = append(line, nline...) |
| 118 | } |
Shinichiro Hamaji | 52e83aa | 2015-04-06 17:20:28 +0900 | [diff] [blame] | 119 | return removeComment(line) |
| 120 | } |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 121 | |
Shinichiro Hamaji | 0b93c86 | 2015-04-07 06:15:15 +0900 | [diff] [blame] | 122 | func (p *parser) processRecipeLine(line []byte) []byte { |
Shinichiro Hamaji | 52e83aa | 2015-04-06 17:20:28 +0900 | [diff] [blame] | 123 | // TODO: Handle \\ at the end of the line? |
| 124 | for len(line) > 0 && line[len(line)-1] == '\\' { |
| 125 | line = append(line, '\n') |
| 126 | lineno := p.lineno |
| 127 | nline := p.readLine() |
| 128 | p.lineno = lineno |
| 129 | line = append(line, nline...) |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 130 | } |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 131 | return line |
| 132 | } |
| 133 | |
| 134 | func (p *parser) unreadLine(line []byte) { |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 135 | if p.hasUnBuf { |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 136 | panic("unreadLine twice!") |
| 137 | } |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 138 | p.unBuf = line |
| 139 | p.hasUnBuf = true |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 140 | } |
| 141 | |
Fumitoshi Ukai | e1b813c | 2015-03-30 18:38:21 +0900 | [diff] [blame] | 142 | func (p *parser) parseAssign(line []byte, sep, esep int) AST { |
Fumitoshi Ukai | 8773e5e | 2015-04-01 11:23:18 +0900 | [diff] [blame] | 143 | Log("parseAssign %q op:%q", line, line[sep:esep]) |
Fumitoshi Ukai | b36f387 | 2015-04-10 15:06:38 +0900 | [diff] [blame] | 144 | // TODO(ukai): parse expr here. |
Fumitoshi Ukai | e1b813c | 2015-03-30 18:38:21 +0900 | [diff] [blame] | 145 | ast := &AssignAST{ |
| 146 | lhs: string(bytes.TrimSpace(line[:sep])), |
Shinichiro Hamaji | c88618f | 2015-04-11 19:58:06 +0900 | [diff] [blame] | 147 | rhs: trimLeftSpace(string(line[esep:])), |
Fumitoshi Ukai | e1b813c | 2015-03-30 18:38:21 +0900 | [diff] [blame] | 148 | op: string(line[sep:esep]), |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 149 | } |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 150 | ast.filename = p.mk.filename |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 151 | ast.lineno = p.lineno |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 152 | return ast |
| 153 | } |
| 154 | |
Shinichiro Hamaji | e12e24d | 2015-04-11 23:09:20 +0900 | [diff] [blame^] | 155 | func (p *parser) parseMaybeRule(line string, equalIndex, semicolonIndex int) AST { |
Shinichiro Hamaji | de82971 | 2015-03-31 18:26:56 +0900 | [diff] [blame] | 156 | if len(strings.TrimSpace(line)) == 0 { |
| 157 | return nil |
| 158 | } |
Shinichiro Hamaji | de82971 | 2015-03-31 18:26:56 +0900 | [diff] [blame] | 159 | |
Shinichiro Hamaji | e12e24d | 2015-04-11 23:09:20 +0900 | [diff] [blame^] | 160 | // Either '=' or ';' is used. |
| 161 | if equalIndex >= 0 && semicolonIndex >= 0 { |
| 162 | if equalIndex < semicolonIndex { |
| 163 | semicolonIndex = -1 |
| 164 | } else { |
| 165 | equalIndex = -1 |
| 166 | } |
| 167 | } |
| 168 | |
Shinichiro Hamaji | 486e9de | 2015-04-09 15:20:32 +0900 | [diff] [blame] | 169 | ast := &MaybeRuleAST{ |
| 170 | expr: line, |
Shinichiro Hamaji | e12e24d | 2015-04-11 23:09:20 +0900 | [diff] [blame^] | 171 | equalIndex: equalIndex, |
Shinichiro Hamaji | 486e9de | 2015-04-09 15:20:32 +0900 | [diff] [blame] | 172 | semicolonIndex: semicolonIndex, |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 173 | } |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 174 | ast.filename = p.mk.filename |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 175 | ast.lineno = p.lineno |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 176 | return ast |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 177 | } |
| 178 | |
Shinichiro Hamaji | d7bef60 | 2015-03-30 19:55:32 +0900 | [diff] [blame] | 179 | func (p *parser) parseInclude(line string, oplen int) AST { |
Fumitoshi Ukai | b36f387 | 2015-04-10 15:06:38 +0900 | [diff] [blame] | 180 | // TODO(ukai): parse expr here |
Shinichiro Hamaji | d7bef60 | 2015-03-30 19:55:32 +0900 | [diff] [blame] | 181 | ast := &IncludeAST{ |
| 182 | expr: line[oplen+1:], |
| 183 | op: line[:oplen], |
| 184 | } |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 185 | ast.filename = p.mk.filename |
Shinichiro Hamaji | d7bef60 | 2015-03-30 19:55:32 +0900 | [diff] [blame] | 186 | ast.lineno = p.lineno |
| 187 | return ast |
| 188 | } |
| 189 | |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 190 | func (p *parser) parseIfdef(line string, oplen int) AST { |
Fumitoshi Ukai | b36f387 | 2015-04-10 15:06:38 +0900 | [diff] [blame] | 191 | // TODO(ukai): parse expr here. |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 192 | ast := &IfAST{ |
Shinichiro Hamaji | ae32b78 | 2015-03-31 14:41:19 +0900 | [diff] [blame] | 193 | op: line[:oplen], |
Fumitoshi Ukai | b36f387 | 2015-04-10 15:06:38 +0900 | [diff] [blame] | 194 | lhs: line[oplen+1:], |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 195 | } |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 196 | ast.filename = p.mk.filename |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 197 | ast.lineno = p.lineno |
| 198 | p.addStatement(ast) |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 199 | p.ifStack = append(p.ifStack, ifState{ast: ast, numNest: p.numIfNest}) |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 200 | p.outStmts = &ast.trueStmts |
| 201 | return ast |
| 202 | } |
| 203 | |
Shinichiro Hamaji | 1f47638 | 2015-04-09 14:46:04 +0900 | [diff] [blame] | 204 | func (p *parser) parseTwoQuotes(s string, op string) ([]string, bool) { |
Shinichiro Hamaji | 76de43e | 2015-04-03 10:40:18 +0900 | [diff] [blame] | 205 | var args []string |
Shinichiro Hamaji | 1f47638 | 2015-04-09 14:46:04 +0900 | [diff] [blame] | 206 | for i := 0; i < 2; i++ { |
| 207 | s = strings.TrimSpace(s) |
Fumitoshi Ukai | b36f387 | 2015-04-10 15:06:38 +0900 | [diff] [blame] | 208 | if s == "" { |
Shinichiro Hamaji | 76de43e | 2015-04-03 10:40:18 +0900 | [diff] [blame] | 209 | return nil, false |
| 210 | } |
Shinichiro Hamaji | 1f47638 | 2015-04-09 14:46:04 +0900 | [diff] [blame] | 211 | quote := s[0] |
| 212 | if quote != '\'' && quote != '"' { |
Shinichiro Hamaji | 76de43e | 2015-04-03 10:40:18 +0900 | [diff] [blame] | 213 | return nil, false |
| 214 | } |
Shinichiro Hamaji | 1f47638 | 2015-04-09 14:46:04 +0900 | [diff] [blame] | 215 | end := strings.IndexByte(s[1:], quote) + 1 |
| 216 | if end < 0 { |
| 217 | return nil, false |
| 218 | } |
Shinichiro Hamaji | 1f47638 | 2015-04-09 14:46:04 +0900 | [diff] [blame] | 219 | args = append(args, s[1:end]) |
| 220 | s = s[end+1:] |
| 221 | } |
| 222 | if len(s) > 0 { |
| 223 | Error(p.mk.filename, p.lineno, `extraneous text after %q directive`, op) |
Shinichiro Hamaji | 76de43e | 2015-04-03 10:40:18 +0900 | [diff] [blame] | 224 | } |
| 225 | return args, true |
| 226 | } |
| 227 | |
Fumitoshi Ukai | b36f387 | 2015-04-10 15:06:38 +0900 | [diff] [blame] | 228 | // parse |
| 229 | // "(lhs, rhs)" |
| 230 | // "lhs, rhs" |
Shinichiro Hamaji | 1f47638 | 2015-04-09 14:46:04 +0900 | [diff] [blame] | 231 | func (p *parser) parseEq(s string, op string) (string, string, bool) { |
Fumitoshi Ukai | b36f387 | 2015-04-10 15:06:38 +0900 | [diff] [blame] | 232 | if s[0] == '(' && s[len(s)-1] == ')' { |
| 233 | s = s[1 : len(s)-1] |
| 234 | term := []byte{','} |
| 235 | in := []byte(s) |
| 236 | v, n, err := parseExpr(in, term) |
| 237 | if err != nil { |
| 238 | return "", "", false |
Shinichiro Hamaji | 76de43e | 2015-04-03 10:40:18 +0900 | [diff] [blame] | 239 | } |
Fumitoshi Ukai | b36f387 | 2015-04-10 15:06:38 +0900 | [diff] [blame] | 240 | lhs := v.String() |
| 241 | n++ |
| 242 | n += skipSpaces(in[n:], nil) |
| 243 | v, n, err = parseExpr(in[n:], nil) |
| 244 | if err != nil { |
| 245 | return "", "", false |
| 246 | } |
| 247 | rhs := v.String() |
| 248 | return lhs, rhs, true |
| 249 | } |
| 250 | args, ok := p.parseTwoQuotes(s, op) |
| 251 | if !ok { |
Fumitoshi Ukai | e520f26 | 2015-03-31 17:27:03 +0900 | [diff] [blame] | 252 | return "", "", false |
| 253 | } |
Fumitoshi Ukai | b36f387 | 2015-04-10 15:06:38 +0900 | [diff] [blame] | 254 | return args[0], args[1], true |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 255 | } |
| 256 | |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 257 | func (p *parser) parseIfeq(line string, oplen int) AST { |
Shinichiro Hamaji | 1f47638 | 2015-04-09 14:46:04 +0900 | [diff] [blame] | 258 | op := line[:oplen] |
| 259 | lhs, rhs, ok := p.parseEq(strings.TrimSpace(line[oplen+1:]), op) |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 260 | if !ok { |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 261 | Error(p.mk.filename, p.lineno, `*** invalid syntax in conditional.`) |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 262 | } |
| 263 | |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 264 | ast := &IfAST{ |
Shinichiro Hamaji | 1f47638 | 2015-04-09 14:46:04 +0900 | [diff] [blame] | 265 | op: op, |
Shinichiro Hamaji | af1e816 | 2015-03-31 02:15:37 +0900 | [diff] [blame] | 266 | lhs: lhs, |
| 267 | rhs: rhs, |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 268 | } |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 269 | ast.filename = p.mk.filename |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 270 | ast.lineno = p.lineno |
| 271 | p.addStatement(ast) |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 272 | p.ifStack = append(p.ifStack, ifState{ast: ast, numNest: p.numIfNest}) |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 273 | p.outStmts = &ast.trueStmts |
| 274 | return ast |
| 275 | } |
| 276 | |
| 277 | func (p *parser) checkIfStack(curKeyword string) { |
| 278 | if len(p.ifStack) == 0 { |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 279 | Error(p.mk.filename, p.lineno, `*** extraneous %q.`, curKeyword) |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 280 | } |
| 281 | } |
| 282 | |
| 283 | func (p *parser) parseElse(line string) { |
| 284 | p.checkIfStack("else") |
| 285 | state := &p.ifStack[len(p.ifStack)-1] |
Fumitoshi Ukai | 0293c7a | 2015-03-31 16:26:53 +0900 | [diff] [blame] | 286 | if state.inElse { |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 287 | Error(p.mk.filename, p.lineno, `*** only one "else" per conditional.`) |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 288 | } |
Fumitoshi Ukai | 0293c7a | 2015-03-31 16:26:53 +0900 | [diff] [blame] | 289 | state.inElse = true |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 290 | p.outStmts = &state.ast.falseStmts |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 291 | |
| 292 | nextIf := strings.TrimSpace(line[len("else"):]) |
| 293 | if len(nextIf) == 0 { |
| 294 | return |
| 295 | } |
| 296 | var ifDirectives = map[string]func(*parser, string){ |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 297 | "ifdef ": ifdefDirective, |
| 298 | "ifndef ": ifndefDirective, |
| 299 | "ifeq ": ifeqDirective, |
| 300 | "ifneq ": ifneqDirective, |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 301 | } |
| 302 | p.numIfNest = state.numNest + 1 |
| 303 | if p.parseKeywords(nextIf, ifDirectives) { |
| 304 | p.numIfNest = 0 |
| 305 | return |
| 306 | } |
| 307 | p.numIfNest = 0 |
| 308 | WarnNoPrefix(p.mk.filename, p.lineno, "extraneous text after `else` directive") |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 309 | } |
| 310 | |
| 311 | func (p *parser) parseEndif(line string) { |
| 312 | p.checkIfStack("endif") |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 313 | state := p.ifStack[len(p.ifStack)-1] |
| 314 | for t := 0; t <= state.numNest; t++ { |
| 315 | p.ifStack = p.ifStack[0 : len(p.ifStack)-1] |
| 316 | if len(p.ifStack) == 0 { |
| 317 | p.outStmts = &p.mk.stmts |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 318 | } else { |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 319 | state := p.ifStack[len(p.ifStack)-1] |
| 320 | if state.inElse { |
| 321 | p.outStmts = &state.ast.falseStmts |
| 322 | } else { |
| 323 | p.outStmts = &state.ast.trueStmts |
| 324 | } |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 325 | } |
| 326 | } |
| 327 | } |
| 328 | |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 329 | var makeDirectives = map[string]func(*parser, string){ |
Fumitoshi Ukai | 8209630 | 2015-04-01 10:37:47 +0900 | [diff] [blame] | 330 | "include ": includeDirective, |
| 331 | "-include ": sincludeDirective, |
| 332 | "sinclude": sincludeDirective, |
| 333 | "ifdef ": ifdefDirective, |
| 334 | "ifndef ": ifndefDirective, |
| 335 | "ifeq ": ifeqDirective, |
| 336 | "ifneq ": ifneqDirective, |
| 337 | "else": elseDirective, |
| 338 | "endif": endifDirective, |
Fumitoshi Ukai | 3d54db8 | 2015-04-01 11:03:31 +0900 | [diff] [blame] | 339 | "define ": defineDirective, |
Fumitoshi Ukai | 8209630 | 2015-04-01 10:37:47 +0900 | [diff] [blame] | 340 | } |
| 341 | |
Shinichiro Hamaji | a06760f | 2015-04-07 13:13:45 +0900 | [diff] [blame] | 342 | func (p *parser) parseKeywords(line string, directives map[string]func(*parser, string)) bool { |
Shinichiro Hamaji | c88618f | 2015-04-11 19:58:06 +0900 | [diff] [blame] | 343 | stripped := trimLeftSpace(line) |
Fumitoshi Ukai | 8209630 | 2015-04-01 10:37:47 +0900 | [diff] [blame] | 344 | for prefix, f := range directives { |
| 345 | if strings.HasPrefix(stripped, prefix) { |
| 346 | f(p, stripped) |
| 347 | return true |
| 348 | } |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 349 | } |
Shinichiro Hamaji | a66a179 | 2015-03-31 18:04:08 +0900 | [diff] [blame] | 350 | return false |
| 351 | } |
| 352 | |
Shinichiro Hamaji | 74b8cb5 | 2015-04-08 19:47:43 +0900 | [diff] [blame] | 353 | func (p *parser) isDirective(line string, directives map[string]func(*parser, string)) bool { |
Shinichiro Hamaji | c88618f | 2015-04-11 19:58:06 +0900 | [diff] [blame] | 354 | stripped := trimLeftSpace(line) |
Shinichiro Hamaji | e103f65 | 2015-04-11 19:49:51 +0900 | [diff] [blame] | 355 | // Fast paths. |
| 356 | // TODO: Consider using a trie. |
| 357 | if len(stripped) == 0 { |
| 358 | return false |
| 359 | } |
| 360 | if ch := stripped[0]; ch != 'i' && ch != '-' && ch != 's' && ch != 'e' && ch != 'd' { |
| 361 | return false |
| 362 | } |
| 363 | |
Shinichiro Hamaji | 74b8cb5 | 2015-04-08 19:47:43 +0900 | [diff] [blame] | 364 | for prefix, _ := range directives { |
| 365 | if strings.HasPrefix(stripped, prefix) { |
| 366 | return true |
| 367 | } |
| 368 | } |
| 369 | return false |
| 370 | } |
| 371 | |
Fumitoshi Ukai | 8209630 | 2015-04-01 10:37:47 +0900 | [diff] [blame] | 372 | func includeDirective(p *parser, line string) { |
| 373 | p.addStatement(p.parseInclude(line, len("include"))) |
| 374 | } |
| 375 | |
| 376 | func sincludeDirective(p *parser, line string) { |
| 377 | p.addStatement(p.parseInclude(line, len("-include"))) |
| 378 | } |
| 379 | |
| 380 | func ifdefDirective(p *parser, line string) { |
| 381 | p.parseIfdef(line, len("ifdef")) |
| 382 | } |
| 383 | |
| 384 | func ifndefDirective(p *parser, line string) { |
| 385 | p.parseIfdef(line, len("ifndef")) |
| 386 | } |
| 387 | |
| 388 | func ifeqDirective(p *parser, line string) { |
| 389 | p.parseIfeq(line, len("ifeq")) |
| 390 | } |
| 391 | |
| 392 | func ifneqDirective(p *parser, line string) { |
| 393 | p.parseIfeq(line, len("ifneq")) |
| 394 | } |
| 395 | |
| 396 | func elseDirective(p *parser, line string) { |
| 397 | p.parseElse(line) |
| 398 | } |
| 399 | |
| 400 | func endifDirective(p *parser, line string) { |
| 401 | p.parseEndif(line) |
| 402 | } |
| 403 | |
Fumitoshi Ukai | 3d54db8 | 2015-04-01 11:03:31 +0900 | [diff] [blame] | 404 | func defineDirective(p *parser, line string) { |
Shinichiro Hamaji | c88618f | 2015-04-11 19:58:06 +0900 | [diff] [blame] | 405 | p.inDef = []string{trimLeftSpace(line[len("define "):])} |
Fumitoshi Ukai | 3d54db8 | 2015-04-01 11:03:31 +0900 | [diff] [blame] | 406 | } |
| 407 | |
Fumitoshi Ukai | f8efa0a | 2015-03-30 18:10:11 +0900 | [diff] [blame] | 408 | func (p *parser) parse() (mk Makefile, err error) { |
| 409 | defer func() { |
| 410 | if r := recover(); r != nil { |
| 411 | err = fmt.Errorf("panic: %v", r) |
| 412 | } |
| 413 | }() |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 414 | for !p.done { |
Shinichiro Hamaji | 0b93c86 | 2015-04-07 06:15:15 +0900 | [diff] [blame] | 415 | line := p.readLine() |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 416 | |
Shinichiro Hamaji | 81372e5 | 2015-04-09 11:32:09 +0900 | [diff] [blame] | 417 | if len(bytes.TrimSpace(line)) == 0 { |
| 418 | continue |
| 419 | } |
| 420 | |
Fumitoshi Ukai | 3d54db8 | 2015-04-01 11:03:31 +0900 | [diff] [blame] | 421 | if len(p.inDef) > 0 { |
Shinichiro Hamaji | 0b93c86 | 2015-04-07 06:15:15 +0900 | [diff] [blame] | 422 | line = p.processMakefileLine(line) |
Shinichiro Hamaji | c88618f | 2015-04-11 19:58:06 +0900 | [diff] [blame] | 423 | if trimLeftSpace(string(line)) == "endef" { |
Fumitoshi Ukai | 3d54db8 | 2015-04-01 11:03:31 +0900 | [diff] [blame] | 424 | Log("multilineAssign %q", p.inDef) |
| 425 | ast := &AssignAST{ |
| 426 | lhs: p.inDef[0], |
| 427 | rhs: strings.Join(p.inDef[1:], "\n"), |
| 428 | op: "=", |
| 429 | } |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 430 | ast.filename = p.mk.filename |
Fumitoshi Ukai | 3d54db8 | 2015-04-01 11:03:31 +0900 | [diff] [blame] | 431 | ast.lineno = p.lineno - len(p.inDef) |
| 432 | p.addStatement(ast) |
| 433 | p.inDef = nil |
| 434 | continue |
| 435 | } |
| 436 | p.inDef = append(p.inDef, string(line)) |
| 437 | continue |
| 438 | } |
| 439 | |
Shinichiro Hamaji | 74b8cb5 | 2015-04-08 19:47:43 +0900 | [diff] [blame] | 440 | if p.isDirective(string(line), makeDirectives) { |
| 441 | line = p.processMakefileLine(line) |
| 442 | p.parseKeywords(string(line), makeDirectives) |
| 443 | continue |
| 444 | } |
| 445 | |
Shinichiro Hamaji | 0b93c86 | 2015-04-07 06:15:15 +0900 | [diff] [blame] | 446 | if line[0] == '\t' { |
| 447 | ast := &CommandAST{cmd: string(p.processRecipeLine(line[1:]))} |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 448 | ast.filename = p.mk.filename |
Shinichiro Hamaji | 0b93c86 | 2015-04-07 06:15:15 +0900 | [diff] [blame] | 449 | ast.lineno = p.lineno |
| 450 | p.addStatement(ast) |
| 451 | continue |
| 452 | } |
| 453 | |
| 454 | line = p.processMakefileLine(line) |
Shinichiro Hamaji | a66a179 | 2015-03-31 18:04:08 +0900 | [diff] [blame] | 455 | |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 456 | var ast AST |
Shinichiro Hamaji | 34e2324 | 2015-04-06 15:44:50 +0900 | [diff] [blame] | 457 | var parenStack []byte |
Shinichiro Hamaji | e12e24d | 2015-04-11 23:09:20 +0900 | [diff] [blame^] | 458 | equalIndex := -1 |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 459 | semicolonIndex := -1 |
| 460 | isRule := false |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 461 | for i, ch := range line { |
| 462 | switch ch { |
Shinichiro Hamaji | 34e2324 | 2015-04-06 15:44:50 +0900 | [diff] [blame] | 463 | case '(', '{': |
| 464 | parenStack = append(parenStack, ch) |
| 465 | case ')', '}': |
| 466 | if len(parenStack) == 0 { |
Shinichiro Hamaji | 491e73f | 2015-04-07 12:41:59 +0900 | [diff] [blame] | 467 | Warn(p.mk.filename, p.lineno, "Unmatched parens: %s", line) |
Shinichiro Hamaji | 34e2324 | 2015-04-06 15:44:50 +0900 | [diff] [blame] | 468 | } else { |
| 469 | parenStack = parenStack[:len(parenStack)-1] |
| 470 | } |
| 471 | } |
| 472 | if len(parenStack) > 0 { |
| 473 | continue |
| 474 | } |
| 475 | |
| 476 | switch ch { |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 477 | case ':': |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 478 | if i+1 < len(line) && line[i+1] == '=' { |
Shinichiro Hamaji | 156ef3e | 2015-04-11 22:44:41 +0900 | [diff] [blame] | 479 | if !isRule { |
| 480 | ast = p.parseAssign(line, i, i+2) |
| 481 | } |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 482 | } else { |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 483 | isRule = true |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 484 | } |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 485 | case ';': |
Shinichiro Hamaji | e12e24d | 2015-04-11 23:09:20 +0900 | [diff] [blame^] | 486 | if semicolonIndex < 0 { |
| 487 | semicolonIndex = i |
| 488 | } |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 489 | case '=': |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 490 | if !isRule { |
| 491 | ast = p.parseAssign(line, i, i+1) |
| 492 | } |
Shinichiro Hamaji | e12e24d | 2015-04-11 23:09:20 +0900 | [diff] [blame^] | 493 | if equalIndex < 0 { |
| 494 | equalIndex = i |
| 495 | } |
Shinichiro Hamaji | 69b7f65 | 2015-03-31 01:01:59 +0900 | [diff] [blame] | 496 | case '?', '+': |
Shinichiro Hamaji | 3fab47e | 2015-04-08 18:34:41 +0900 | [diff] [blame] | 497 | if !isRule && i+1 < len(line) && line[i+1] == '=' { |
Shinichiro Hamaji | 69b7f65 | 2015-03-31 01:01:59 +0900 | [diff] [blame] | 498 | ast = p.parseAssign(line, i, i+2) |
| 499 | } |
Shinichiro Hamaji | e184158 | 2015-03-30 17:20:33 +0900 | [diff] [blame] | 500 | } |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 501 | if ast != nil { |
Shinichiro Hamaji | 497754d | 2015-03-31 02:02:11 +0900 | [diff] [blame] | 502 | p.addStatement(ast) |
Shinichiro Hamaji | 7f1ede3 | 2015-03-30 18:05:22 +0900 | [diff] [blame] | 503 | break |
| 504 | } |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 505 | } |
Shinichiro Hamaji | de82971 | 2015-03-31 18:26:56 +0900 | [diff] [blame] | 506 | if ast == nil { |
Shinichiro Hamaji | e12e24d | 2015-04-11 23:09:20 +0900 | [diff] [blame^] | 507 | ast = p.parseMaybeRule(string(line), equalIndex, semicolonIndex) |
Shinichiro Hamaji | de82971 | 2015-03-31 18:26:56 +0900 | [diff] [blame] | 508 | if ast != nil { |
| 509 | p.addStatement(ast) |
| 510 | } |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 511 | } |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 512 | } |
| 513 | return p.mk, nil |
| 514 | } |
| 515 | |
| 516 | func ParseMakefile(filename string) (Makefile, error) { |
| 517 | f, err := os.Open(filename) |
| 518 | if err != nil { |
| 519 | return Makefile{}, err |
| 520 | } |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 521 | defer f.Close() |
Shinichiro Hamaji | 685fecf | 2015-03-30 18:28:12 +0900 | [diff] [blame] | 522 | parser := newParser(f, filename) |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 523 | return parser.parse() |
| 524 | } |
| 525 | |
| 526 | func ParseDefaultMakefile() (Makefile, error) { |
| 527 | candidates := []string{"GNUmakefile", "makefile", "Makefile"} |
| 528 | for _, filename := range candidates { |
| 529 | if exists(filename) { |
| 530 | return ParseMakefile(filename) |
| 531 | } |
| 532 | } |
Fumitoshi Ukai | cf2b038 | 2015-03-30 17:48:54 +0900 | [diff] [blame] | 533 | return Makefile{}, errors.New("no targets specified and no makefile found.") |
Fumitoshi Ukai | 119dc91 | 2015-03-30 16:52:41 +0900 | [diff] [blame] | 534 | } |
Shinichiro Hamaji | c384081 | 2015-04-02 02:10:20 +0900 | [diff] [blame] | 535 | |
Shinichiro Hamaji | 28ea5bc | 2015-04-11 12:41:08 +0900 | [diff] [blame] | 536 | func parseMakefileReader(rd io.Reader, name string, lineno int) (Makefile, error) { |
Shinichiro Hamaji | a5dee37 | 2015-04-03 16:41:30 +0900 | [diff] [blame] | 537 | parser := newParser(rd, name) |
Shinichiro Hamaji | 370be72 | 2015-04-10 14:55:23 +0900 | [diff] [blame] | 538 | parser.lineno = lineno |
Shinichiro Hamaji | 29ffc97 | 2015-04-06 16:13:27 +0900 | [diff] [blame] | 539 | parser.elineno = lineno |
Shinichiro Hamaji | 370be72 | 2015-04-10 14:55:23 +0900 | [diff] [blame] | 540 | parser.linenoFixed = true |
Shinichiro Hamaji | a5dee37 | 2015-04-03 16:41:30 +0900 | [diff] [blame] | 541 | return parser.parse() |
Shinichiro Hamaji | c384081 | 2015-04-02 02:10:20 +0900 | [diff] [blame] | 542 | } |
Shinichiro Hamaji | 28ea5bc | 2015-04-11 12:41:08 +0900 | [diff] [blame] | 543 | |
| 544 | func ParseMakefileString(s string, name string, lineno int) (Makefile, error) { |
| 545 | return parseMakefileReader(strings.NewReader(s), name, lineno) |
| 546 | } |
| 547 | |
| 548 | func ParseMakefileBytes(s []byte, name string, lineno int) (Makefile, error) { |
| 549 | return parseMakefileReader(bytes.NewReader(s), name, lineno) |
| 550 | } |