From a3e4f455ac0265d9f2477300054f504f563b0c58 Mon Sep 17 00:00:00 2001 From: Matt Kraai Date: Mon, 20 Aug 2001 21:21:06 +0000 Subject: Fix a problem with unsatisfied backrefs (noted by Martin Bene). --- editors/sed.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'editors') diff --git a/editors/sed.c b/editors/sed.c index a18cfc7c3..352c5c94f 100644 --- a/editors/sed.c +++ b/editors/sed.c @@ -490,7 +490,7 @@ static void load_cmd_file(char *filename) } } -static void print_subst_w_backrefs(const char *line, const char *replace, regmatch_t *regmatch) +static void print_subst_w_backrefs(const char *line, const char *replace, regmatch_t *regmatch, int matches) { int i; @@ -506,8 +506,9 @@ static void print_subst_w_backrefs(const char *line, const char *replace, regmat tmpstr[1] = 0; backref = atoi(tmpstr); /* print out the text held in regmatch[backref] */ - for (j = regmatch[backref].rm_so; j < regmatch[backref].rm_eo; j++) - fputc(line[j], stdout); + if (backref <= matches && regmatch[backref].rm_so != -1) + for (j = regmatch[backref].rm_so; j < regmatch[backref].rm_eo; j++) + fputc(line[j], stdout); } /* if we find a backslash escaped character, print the character */ @@ -555,7 +556,8 @@ static int do_subst_command(const struct sed_cmd *sed_cmd, const char *line) fputc(hackline[i], stdout); /* then print the substitution string */ - print_subst_w_backrefs(hackline, sed_cmd->replace, regmatch); + print_subst_w_backrefs(hackline, sed_cmd->replace, regmatch, + sed_cmd->num_backrefs); /* advance past the match */ hackline += regmatch[0].rm_eo; -- cgit v1.2.3