diff options
Diffstat (limited to 'editors/sed.c')
| -rw-r--r-- | editors/sed.c | 41 |
1 files changed, 36 insertions, 5 deletions
diff --git a/editors/sed.c b/editors/sed.c index 2c64ad5..7bbf820 100644 --- a/editors/sed.c +++ b/editors/sed.c @@ -53,6 +53,7 @@ * Reference * http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html * http://pubs.opengroup.org/onlinepubs/9699919799/utilities/sed.html + * http://sed.sourceforge.net/sedfaq3.html */ //config:config SED @@ -109,7 +110,8 @@ typedef struct sed_cmd_s { regex_t *sub_match; /* For 's/sub_match/string/' */ int beg_line; /* 'sed 1p' 0 == apply commands to all lines */ int beg_line_orig; /* copy of the above, needed for -i */ - int end_line; /* 'sed 1,3p' 0 == one line only. -1 = last line ($) */ + int end_line; /* 'sed 1,3p' 0 == one line only. -1 = last line ($). -2-N = +N */ + int end_line_orig; FILE *sw_file; /* File (sw) command writes to, -1 for none. */ char *string; /* Data string for (saicytb) commands. */ @@ -640,10 +642,29 @@ static void add_cmd(const char *cmdstr) int idx; cmdstr++; - idx = get_address(cmdstr, &sed_cmd->end_line, &sed_cmd->end_match); - if (!idx) + if (*cmdstr == '+' && isdigit(cmdstr[1])) { + /* http://sed.sourceforge.net/sedfaq3.html#s3.3 + * Under GNU sed 3.02+, ssed, and sed15+, <address2> + * may also be a notation of the form +num, + * indicating the next num lines after <address1> is + * matched. + * GNU sed 4.2.1 accepts even "+" (meaning "+0"). + * We don't (we check for isdigit, see above), think + * about the "+-3" case. + */ + char *end; + /* code is smaller compared to using &cmdstr here: */ + idx = strtol(cmdstr+1, &end, 10); + sed_cmd->end_line = -2 - idx; + cmdstr = end; + } else { + idx = get_address(cmdstr, &sed_cmd->end_line, &sed_cmd->end_match); + cmdstr += idx; + idx--; /* if 0, trigger error check below */ + } + if (idx < 0) bb_error_msg_and_die("no address after comma"); - cmdstr += idx; + sed_cmd->end_line_orig = sed_cmd->end_line; } /* skip whitespace before the command */ @@ -1089,10 +1110,19 @@ static void process_files(void) /* Is this line the end of the current match? */ if (matched) { + if (sed_cmd->end_line <= -2) { + /* address2 is +N, i.e. N lines from beg_line */ + sed_cmd->end_line = linenum + (-sed_cmd->end_line - 2); + } /* once matched, "n,xxx" range is dead, disabling it */ if (sed_cmd->beg_line > 0) { sed_cmd->beg_line = -2; } + dbg("end1:%d", sed_cmd->end_line ? sed_cmd->end_line == -1 + ? !next_line : (sed_cmd->end_line <= linenum) + : !sed_cmd->end_match); + dbg("end2:%d", sed_cmd->end_match && old_matched + && !regexec(sed_cmd->end_match,pattern_space, 0, NULL, 0)); sed_cmd->in_match = !( /* has the ending line come, or is this a single address command? */ (sed_cmd->end_line @@ -1551,9 +1581,10 @@ int sed_main(int argc UNUSED_PARAM, char **argv) free(G.outname); G.outname = NULL; - /* Re-enable disabled range matches */ + /* Fix disabled range matches and mangled ",+N" ranges */ for (sed_cmd = G.sed_cmd_head; sed_cmd; sed_cmd = sed_cmd->next) { sed_cmd->beg_line = sed_cmd->beg_line_orig; + sed_cmd->end_line = sed_cmd->end_line_orig; } } /* Here, to handle "sed 'cmds' nonexistent_file" case we did: |