| 1 | module ferp_output |
| 2 | !> Output formatting for FERP |
| 3 | !> All output functions are thread-safe via OMP critical sections |
| 4 | use ferp_kinds |
| 5 | use ferp_options |
| 6 | use, intrinsic :: iso_fortran_env, only: output_unit, error_unit |
| 7 | use, intrinsic :: iso_c_binding, only: c_int |
| 8 | implicit none |
| 9 | private |
| 10 | |
| 11 | public :: print_match, print_count, print_filename |
| 12 | public :: print_context_line, print_separator |
| 13 | public :: print_binary_match, print_only_match |
| 14 | public :: print_match_colored |
| 15 | public :: stdout_is_tty |
| 16 | |
| 17 | ! C interface for isatty |
| 18 | interface |
| 19 | function c_isatty(fd) bind(C, name="isatty") |
| 20 | import :: c_int |
| 21 | integer(c_int), value :: fd |
| 22 | integer(c_int) :: c_isatty |
| 23 | end function c_isatty |
| 24 | end interface |
| 25 | |
| 26 | ! ANSI color codes |
| 27 | character(len=*), parameter :: COLOR_MATCH = char(27) // '[01;31m' ! Bold red |
| 28 | character(len=*), parameter :: COLOR_RESET = char(27) // '[0m' |
| 29 | character(len=*), parameter :: COLOR_FILENAME = char(27) // '[35m' ! Magenta |
| 30 | character(len=*), parameter :: COLOR_LINENUM = char(27) // '[32m' ! Green |
| 31 | character(len=*), parameter :: COLOR_SEP = char(27) // '[36m' ! Cyan |
| 32 | |
| 33 | contains |
| 34 | |
| 35 | function stdout_is_tty() result(is_tty) |
| 36 | !> Check if stdout is a terminal (for --color=auto) |
| 37 | logical :: is_tty |
| 38 | integer(c_int), parameter :: STDOUT_FILENO = 1 |
| 39 | |
| 40 | is_tty = (c_isatty(STDOUT_FILENO) /= 0) |
| 41 | end function stdout_is_tty |
| 42 | |
| 43 | subroutine print_match(line, filename, line_num, byte_off, opts) |
| 44 | !> Print a matching line with appropriate prefixes |
| 45 | !> Thread-safe via OMP critical section |
| 46 | character(len=*), intent(in) :: line |
| 47 | character(len=*), intent(in) :: filename |
| 48 | integer, intent(in) :: line_num |
| 49 | integer(i64), intent(in) :: byte_off |
| 50 | type(grep_options), intent(in) :: opts |
| 51 | character(len=16) :: num_fmt |
| 52 | |
| 53 | ! Quiet mode - no output |
| 54 | if (opts%quiet) return |
| 55 | |
| 56 | !$omp critical(output_lock) |
| 57 | ! Print filename prefix |
| 58 | if (opts%show_filename .and. .not. opts%hide_filename) then |
| 59 | if (opts%null_after_filename) then |
| 60 | write(output_unit, '(A,A)', advance='no') trim(filename), char(0) |
| 61 | else |
| 62 | write(output_unit, '(A,A)', advance='no') trim(filename), ':' |
| 63 | end if |
| 64 | end if |
| 65 | |
| 66 | ! Print line number prefix (use width for -T alignment) |
| 67 | if (opts%show_line_number) then |
| 68 | if (opts%initial_tab .and. opts%line_number_width > 1) then |
| 69 | write(num_fmt, '(A,I0,A)') '(I', opts%line_number_width, ',A)' |
| 70 | write(output_unit, num_fmt, advance='no') line_num, ':' |
| 71 | else |
| 72 | write(output_unit, '(I0,A)', advance='no') line_num, ':' |
| 73 | end if |
| 74 | end if |
| 75 | |
| 76 | ! Print byte offset prefix |
| 77 | if (opts%show_byte_offset) then |
| 78 | write(output_unit, '(I0,A)', advance='no') byte_off, ':' |
| 79 | end if |
| 80 | |
| 81 | ! Print tab alignment if requested (only when there's a prefix) |
| 82 | if (opts%initial_tab .and. & |
| 83 | ((opts%show_filename .and. .not. opts%hide_filename) .or. & |
| 84 | opts%show_line_number .or. opts%show_byte_offset)) then |
| 85 | write(output_unit, '(A)', advance='no') char(9) ! TAB |
| 86 | end if |
| 87 | |
| 88 | ! Print the line (preserve trailing whitespace) |
| 89 | if (opts%null_data) then |
| 90 | write(output_unit, '(A,A)', advance='no') line, char(0) |
| 91 | else |
| 92 | write(output_unit, '(A)') line |
| 93 | end if |
| 94 | |
| 95 | ! Line-buffered mode |
| 96 | if (opts%line_buffered) flush(output_unit) |
| 97 | !$omp end critical(output_lock) |
| 98 | |
| 99 | end subroutine print_match |
| 100 | |
| 101 | subroutine print_context_line(line, filename, line_num, byte_off, opts) |
| 102 | !> Print a context line (uses - instead of : as separator) |
| 103 | !> Thread-safe via OMP critical section |
| 104 | character(len=*), intent(in) :: line |
| 105 | character(len=*), intent(in) :: filename |
| 106 | integer, intent(in) :: line_num |
| 107 | integer(i64), intent(in) :: byte_off |
| 108 | type(grep_options), intent(in) :: opts |
| 109 | character(len=16) :: num_fmt |
| 110 | |
| 111 | if (opts%quiet) return |
| 112 | |
| 113 | !$omp critical(output_lock) |
| 114 | ! Print filename prefix with - separator |
| 115 | if (opts%show_filename .and. .not. opts%hide_filename) then |
| 116 | if (opts%null_after_filename) then |
| 117 | write(output_unit, '(A,A)', advance='no') trim(filename), char(0) |
| 118 | else |
| 119 | write(output_unit, '(A,A)', advance='no') trim(filename), '-' |
| 120 | end if |
| 121 | end if |
| 122 | |
| 123 | ! Print line number prefix with - separator (use width for -T alignment) |
| 124 | if (opts%show_line_number) then |
| 125 | if (opts%initial_tab .and. opts%line_number_width > 1) then |
| 126 | write(num_fmt, '(A,I0,A)') '(I', opts%line_number_width, ',A)' |
| 127 | write(output_unit, num_fmt, advance='no') line_num, '-' |
| 128 | else |
| 129 | write(output_unit, '(I0,A)', advance='no') line_num, '-' |
| 130 | end if |
| 131 | end if |
| 132 | |
| 133 | ! Print byte offset prefix with - separator |
| 134 | if (opts%show_byte_offset) then |
| 135 | write(output_unit, '(I0,A)', advance='no') byte_off, '-' |
| 136 | end if |
| 137 | |
| 138 | ! Print tab alignment if requested (only when there's a prefix) |
| 139 | if (opts%initial_tab .and. & |
| 140 | ((opts%show_filename .and. .not. opts%hide_filename) .or. & |
| 141 | opts%show_line_number .or. opts%show_byte_offset)) then |
| 142 | write(output_unit, '(A)', advance='no') char(9) |
| 143 | end if |
| 144 | |
| 145 | ! Print the line (preserve trailing whitespace) |
| 146 | if (opts%null_data) then |
| 147 | write(output_unit, '(A,A)', advance='no') line, char(0) |
| 148 | else |
| 149 | write(output_unit, '(A)') line |
| 150 | end if |
| 151 | |
| 152 | ! Line-buffered mode |
| 153 | if (opts%line_buffered) flush(output_unit) |
| 154 | !$omp end critical(output_lock) |
| 155 | |
| 156 | end subroutine print_context_line |
| 157 | |
| 158 | subroutine print_separator(opts) |
| 159 | !> Print group separator between context groups |
| 160 | !> Thread-safe via OMP critical section |
| 161 | type(grep_options), intent(in) :: opts |
| 162 | |
| 163 | if (opts%quiet) return |
| 164 | if (opts%no_group_separator) return |
| 165 | |
| 166 | !$omp critical(output_lock) |
| 167 | write(output_unit, '(A)') trim(opts%group_separator) |
| 168 | |
| 169 | ! Line-buffered mode |
| 170 | if (opts%line_buffered) flush(output_unit) |
| 171 | !$omp end critical(output_lock) |
| 172 | |
| 173 | end subroutine print_separator |
| 174 | |
| 175 | subroutine print_count(count, filename, opts) |
| 176 | !> Print match count (for -c option) |
| 177 | !> Thread-safe via OMP critical section |
| 178 | integer, intent(in) :: count |
| 179 | character(len=*), intent(in) :: filename |
| 180 | type(grep_options), intent(in) :: opts |
| 181 | |
| 182 | if (opts%quiet) return |
| 183 | |
| 184 | !$omp critical(output_lock) |
| 185 | if (opts%show_filename .and. .not. opts%hide_filename) then |
| 186 | if (opts%null_after_filename) then |
| 187 | write(output_unit, '(A,A,I0)') trim(filename), char(0), count |
| 188 | else |
| 189 | write(output_unit, '(A,A,I0)') trim(filename), ':', count |
| 190 | end if |
| 191 | else |
| 192 | write(output_unit, '(I0)') count |
| 193 | end if |
| 194 | |
| 195 | ! Line-buffered mode |
| 196 | if (opts%line_buffered) flush(output_unit) |
| 197 | !$omp end critical(output_lock) |
| 198 | |
| 199 | end subroutine print_count |
| 200 | |
| 201 | subroutine print_filename(filename, opts) |
| 202 | !> Print just filename (for -l, -L options) |
| 203 | !> Thread-safe via OMP critical section |
| 204 | character(len=*), intent(in) :: filename |
| 205 | type(grep_options), intent(in) :: opts |
| 206 | |
| 207 | if (opts%quiet) return |
| 208 | |
| 209 | !$omp critical(output_lock) |
| 210 | if (opts%null_after_filename) then |
| 211 | write(output_unit, '(A,A)', advance='no') trim(filename), char(0) |
| 212 | else |
| 213 | write(output_unit, '(A)') trim(filename) |
| 214 | end if |
| 215 | |
| 216 | ! Line-buffered mode |
| 217 | if (opts%line_buffered) flush(output_unit) |
| 218 | !$omp end critical(output_lock) |
| 219 | |
| 220 | end subroutine print_filename |
| 221 | |
| 222 | subroutine print_binary_match(filename, opts) |
| 223 | !> Print binary file match message |
| 224 | !> Thread-safe via OMP critical section |
| 225 | character(len=*), intent(in) :: filename |
| 226 | type(grep_options), intent(in) :: opts |
| 227 | |
| 228 | if (opts%quiet) return |
| 229 | |
| 230 | !$omp critical(output_lock) |
| 231 | write(output_unit, '(A)') 'Binary file ' // trim(filename) // ' matches' |
| 232 | |
| 233 | ! Line-buffered mode |
| 234 | if (opts%line_buffered) flush(output_unit) |
| 235 | !$omp end critical(output_lock) |
| 236 | |
| 237 | end subroutine print_binary_match |
| 238 | |
| 239 | subroutine print_only_match(line, match_start, match_end, filename, line_num, byte_off, opts) |
| 240 | !> Print only the matched portion of a line (for -o option) |
| 241 | !> Thread-safe via OMP critical section |
| 242 | character(len=*), intent(in) :: line |
| 243 | integer, intent(in) :: match_start, match_end |
| 244 | character(len=*), intent(in) :: filename |
| 245 | integer, intent(in) :: line_num |
| 246 | integer(i64), intent(in) :: byte_off |
| 247 | type(grep_options), intent(in) :: opts |
| 248 | character(len=16) :: num_fmt |
| 249 | |
| 250 | if (opts%quiet) return |
| 251 | |
| 252 | !$omp critical(output_lock) |
| 253 | ! Print filename prefix |
| 254 | if (opts%show_filename .and. .not. opts%hide_filename) then |
| 255 | if (opts%null_after_filename) then |
| 256 | write(output_unit, '(A,A)', advance='no') trim(filename), char(0) |
| 257 | else |
| 258 | write(output_unit, '(A,A)', advance='no') trim(filename), ':' |
| 259 | end if |
| 260 | end if |
| 261 | |
| 262 | ! Print line number prefix (use width for -T alignment) |
| 263 | if (opts%show_line_number) then |
| 264 | if (opts%initial_tab .and. opts%line_number_width > 1) then |
| 265 | write(num_fmt, '(A,I0,A)') '(I', opts%line_number_width, ',A)' |
| 266 | write(output_unit, num_fmt, advance='no') line_num, ':' |
| 267 | else |
| 268 | write(output_unit, '(I0,A)', advance='no') line_num, ':' |
| 269 | end if |
| 270 | end if |
| 271 | |
| 272 | ! Print byte offset prefix (offset to start of match) |
| 273 | if (opts%show_byte_offset) then |
| 274 | write(output_unit, '(I0,A)', advance='no') byte_off + match_start - 1, ':' |
| 275 | end if |
| 276 | |
| 277 | ! Print tab alignment if requested (only when there's a prefix) |
| 278 | if (opts%initial_tab .and. & |
| 279 | ((opts%show_filename .and. .not. opts%hide_filename) .or. & |
| 280 | opts%show_line_number .or. opts%show_byte_offset)) then |
| 281 | write(output_unit, '(A)', advance='no') char(9) |
| 282 | end if |
| 283 | |
| 284 | ! Print just the matched portion |
| 285 | if (match_start >= 1 .and. match_end >= match_start .and. match_end <= len(line)) then |
| 286 | if (opts%null_data) then |
| 287 | write(output_unit, '(A,A)', advance='no') line(match_start:match_end), char(0) |
| 288 | else |
| 289 | write(output_unit, '(A)') line(match_start:match_end) |
| 290 | end if |
| 291 | end if |
| 292 | |
| 293 | ! Line-buffered mode |
| 294 | if (opts%line_buffered) flush(output_unit) |
| 295 | !$omp end critical(output_lock) |
| 296 | |
| 297 | end subroutine print_only_match |
| 298 | |
| 299 | subroutine print_match_colored(line, filename, line_num, byte_off, opts, & |
| 300 | match_starts, match_ends, num_matches) |
| 301 | !> Print a matching line with colored highlighting of matches |
| 302 | !> Thread-safe via OMP critical section |
| 303 | character(len=*), intent(in) :: line |
| 304 | character(len=*), intent(in) :: filename |
| 305 | integer, intent(in) :: line_num |
| 306 | integer(i64), intent(in) :: byte_off |
| 307 | type(grep_options), intent(in) :: opts |
| 308 | integer, intent(in) :: match_starts(:), match_ends(:) |
| 309 | integer, intent(in) :: num_matches |
| 310 | |
| 311 | integer :: i, pos, line_len |
| 312 | logical :: use_color |
| 313 | character(len=16) :: num_fmt |
| 314 | |
| 315 | if (opts%quiet) return |
| 316 | |
| 317 | ! Determine if we should use color |
| 318 | use_color = .false. |
| 319 | if (opts%color_mode == COLOR_ALWAYS) then |
| 320 | use_color = .true. |
| 321 | else if (opts%color_mode == COLOR_AUTO) then |
| 322 | use_color = stdout_is_tty() |
| 323 | end if |
| 324 | |
| 325 | !$omp critical(output_lock) |
| 326 | ! Print filename prefix |
| 327 | if (opts%show_filename .and. .not. opts%hide_filename) then |
| 328 | if (use_color) then |
| 329 | write(output_unit, '(A)', advance='no') COLOR_FILENAME |
| 330 | end if |
| 331 | if (opts%null_after_filename) then |
| 332 | write(output_unit, '(A,A)', advance='no') trim(filename), char(0) |
| 333 | else |
| 334 | write(output_unit, '(A)', advance='no') trim(filename) |
| 335 | end if |
| 336 | if (use_color) then |
| 337 | write(output_unit, '(A)', advance='no') COLOR_RESET |
| 338 | end if |
| 339 | if (.not. opts%null_after_filename) then |
| 340 | if (use_color) then |
| 341 | write(output_unit, '(A,A,A)', advance='no') COLOR_SEP, ':', COLOR_RESET |
| 342 | else |
| 343 | write(output_unit, '(A)', advance='no') ':' |
| 344 | end if |
| 345 | end if |
| 346 | end if |
| 347 | |
| 348 | ! Print line number prefix (use width for -T alignment) |
| 349 | if (opts%show_line_number) then |
| 350 | if (opts%initial_tab .and. opts%line_number_width > 1) then |
| 351 | write(num_fmt, '(A,I0,A)') '(I', opts%line_number_width, ')' |
| 352 | if (use_color) then |
| 353 | write(output_unit, '(A)', advance='no') COLOR_LINENUM |
| 354 | write(output_unit, num_fmt, advance='no') line_num |
| 355 | write(output_unit, '(A)', advance='no') COLOR_RESET |
| 356 | write(output_unit, '(A,A,A)', advance='no') COLOR_SEP, ':', COLOR_RESET |
| 357 | else |
| 358 | write(output_unit, num_fmt, advance='no') line_num |
| 359 | write(output_unit, '(A)', advance='no') ':' |
| 360 | end if |
| 361 | else |
| 362 | if (use_color) then |
| 363 | write(output_unit, '(A,I0,A)', advance='no') COLOR_LINENUM, line_num, COLOR_RESET |
| 364 | write(output_unit, '(A,A,A)', advance='no') COLOR_SEP, ':', COLOR_RESET |
| 365 | else |
| 366 | write(output_unit, '(I0,A)', advance='no') line_num, ':' |
| 367 | end if |
| 368 | end if |
| 369 | end if |
| 370 | |
| 371 | ! Print byte offset prefix |
| 372 | if (opts%show_byte_offset) then |
| 373 | if (use_color) then |
| 374 | write(output_unit, '(A,I0,A)', advance='no') COLOR_LINENUM, byte_off, COLOR_RESET |
| 375 | write(output_unit, '(A,A,A)', advance='no') COLOR_SEP, ':', COLOR_RESET |
| 376 | else |
| 377 | write(output_unit, '(I0,A)', advance='no') byte_off, ':' |
| 378 | end if |
| 379 | end if |
| 380 | |
| 381 | ! Print tab alignment if requested (only when there's a prefix) |
| 382 | if (opts%initial_tab .and. & |
| 383 | ((opts%show_filename .and. .not. opts%hide_filename) .or. & |
| 384 | opts%show_line_number .or. opts%show_byte_offset)) then |
| 385 | write(output_unit, '(A)', advance='no') char(9) |
| 386 | end if |
| 387 | |
| 388 | ! Print line with highlighted matches |
| 389 | line_len = len_trim(line) |
| 390 | if (num_matches > 0 .and. use_color) then |
| 391 | pos = 1 |
| 392 | do i = 1, num_matches |
| 393 | ! Print text before match |
| 394 | if (match_starts(i) > pos) then |
| 395 | write(output_unit, '(A)', advance='no') line(pos:match_starts(i)-1) |
| 396 | end if |
| 397 | ! Print highlighted match |
| 398 | if (match_starts(i) >= 1 .and. match_ends(i) <= line_len) then |
| 399 | write(output_unit, '(A)', advance='no') COLOR_MATCH |
| 400 | write(output_unit, '(A)', advance='no') line(match_starts(i):match_ends(i)) |
| 401 | write(output_unit, '(A)', advance='no') COLOR_RESET |
| 402 | end if |
| 403 | pos = match_ends(i) + 1 |
| 404 | end do |
| 405 | ! Print text after last match |
| 406 | if (pos <= line_len) then |
| 407 | if (opts%null_data) then |
| 408 | write(output_unit, '(A,A)', advance='no') line(pos:line_len), char(0) |
| 409 | else |
| 410 | write(output_unit, '(A)') line(pos:line_len) |
| 411 | end if |
| 412 | else |
| 413 | if (opts%null_data) then |
| 414 | write(output_unit, '(A)', advance='no') char(0) |
| 415 | else |
| 416 | write(output_unit, '(A)') '' |
| 417 | end if |
| 418 | end if |
| 419 | else |
| 420 | ! No color - just print the line (preserve trailing whitespace) |
| 421 | if (opts%null_data) then |
| 422 | write(output_unit, '(A,A)', advance='no') line, char(0) |
| 423 | else |
| 424 | write(output_unit, '(A)') line |
| 425 | end if |
| 426 | end if |
| 427 | |
| 428 | ! Line-buffered mode |
| 429 | if (opts%line_buffered) flush(output_unit) |
| 430 | !$omp end critical(output_lock) |
| 431 | |
| 432 | end subroutine print_match_colored |
| 433 | |
| 434 | end module ferp_output |
| 435 |