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-rw-r--r--toys/posix/sed.c42
1 files changed, 24 insertions, 18 deletions
diff --git a/toys/posix/sed.c b/toys/posix/sed.c
index 705ea7bc..20975320 100644
--- a/toys/posix/sed.c
+++ b/toys/posix/sed.c
@@ -4,7 +4,7 @@
*
* See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/sed.html
*
- * TODO: lines > 2G could signed int wrap length counters. Not just getline()
+ * TODO: lines > 2G could wrap signed int length counters. Not just getline()
* but N and s///
USE_SED(NEWTOY(sed, "(version)e*f*inEr[+Er]", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_LOCALE))
@@ -967,29 +967,35 @@ resume_a:
}
// Extend allocation to include new string. We use offsets instead of
- // pointers so realloc() moving stuff doesn't break things. Do it
- // here instead of toybuf so there's no maximum size.
+ // pointers so realloc() moving stuff doesn't break things. Ok to write
+ // \n over NUL terminator because call to extend_string() adds it back.
if (!corwin->arg1) corwin->arg1 = reg - (char*)corwin;
else if ((corwin+1) != (void *)reg) *(reg++) = '\n';
reg = extend_string((void *)&corwin, line, reg - (char *)corwin, end);
- line += end;
-
- // Line continuation? (Two slightly different input methods, -e with
- // embedded newline vs -f line by line. Must parse both correctly.)
- if (!strchr("btT:", c) && line[-1] == '\\') {
- // backslash only matters if we have an odd number of them
- for (i = 0; i<end; i++) if (line[-i-1] != '\\') break;
- if (i&1) {
- // reg is next available space, so reg[-1] is the null terminator
- reg[-2] = 0;
- if (*line && line[1]) {
- reg -= 2;
+ // Recopy data to remove escape sequences and handle line continuation.
+ if (strchr("aci", c)) {
+ reg -= end+1;
+ for (i = end; i; i--) {
+ if ((*reg++ = *line++)=='\\') {
+
+ // escape at end of line: resume if -e escaped literal newline,
+ // else request callback and resume with next line
+ if (!--i) {
+ *--reg = 0;
+ if (*line) {
+ line++;
+ goto resume_a;
+ }
+ corwin->hit = 256;
+ break;
+ }
+ if (!(reg[-1] = unescape(*line))) reg[-1] = *line;
line++;
- goto resume_a;
- } else corwin->hit = 256;
+ }
}
- }
+ *reg = 0;
+ } else line += end;
// Commands that take no arguments
} else if (!strchr("{dDgGhHlnNpPqx=", c)) break;