diff options
| -rw-r--r-- | include/libbb.h | 1 | ||||
| -rw-r--r-- | libbb/lineedit.c | 26 | ||||
| -rw-r--r-- | libbb/read_key.c | 9 | ||||
| -rwxr-xr-x | testsuite/ash.tests | 42 |
4 files changed, 73 insertions, 5 deletions
diff --git a/include/libbb.h b/include/libbb.h index ead1020..fccc816 100644 --- a/include/libbb.h +++ b/include/libbb.h @@ -1277,6 +1277,7 @@ enum { * on first call. */ int64_t read_key(int fd, char *buffer) FAST_FUNC; +void read_key_ungets(char *buffer, const char *str, unsigned len) FAST_FUNC; #if ENABLE_FEATURE_EDITING diff --git a/libbb/lineedit.c b/libbb/lineedit.c index c50b31d..8e339da 100644 --- a/libbb/lineedit.c +++ b/libbb/lineedit.c @@ -1700,18 +1700,34 @@ static int lineedit_read_key(char *read_key_buffer) #endif #if ENABLE_FEATURE_ASSUME_UNICODE - { + if (unicode_status == UNICODE_ON) { wchar_t wc; if ((int32_t)ic < 0) /* KEYCODE_xxx */ return ic; + // TODO: imagine sequence like: 0xff, <left-arrow>: we are currently losing 0xff... + unicode_buf[unicode_idx++] = ic; unicode_buf[unicode_idx] = '\0'; - if (mbstowcs(&wc, unicode_buf, 1) != 1 && unicode_idx < MB_CUR_MAX) { - delay = 50; - goto poll_again; + if (mbstowcs(&wc, unicode_buf, 1) != 1) { + /* Not (yet?) a valid unicode char */ + if (unicode_idx < MB_CUR_MAX) { + delay = 50; + goto poll_again; + } + /* Invalid sequence. Save all "bad bytes" except first */ + read_key_ungets(read_key_buffer, unicode_buf + 1, MB_CUR_MAX - 1); + /* + * ic = unicode_buf[0] sounds even better, but currently + * this does not work: wchar_t[] -> char[] conversion + * when lineedit finishes mangles such "raw bytes" + * (by misinterpreting them as unicode chars): + */ + ic = CONFIG_SUBST_WCHAR; + } else { + /* Valid unicode char, return its code */ + ic = wc; } - ic = wc; } #endif } while (errno == EAGAIN); diff --git a/libbb/read_key.c b/libbb/read_key.c index a2253ce..98b3131 100644 --- a/libbb/read_key.c +++ b/libbb/read_key.c @@ -246,3 +246,12 @@ int64_t FAST_FUNC read_key(int fd, char *buffer) buffer[-1] = 0; goto start_over; } + +void FAST_FUNC read_key_ungets(char *buffer, const char *str, unsigned len) +{ + unsigned cur_len = (unsigned char)buffer[0]; + if (len > KEYCODE_BUFFER_SIZE-1 - cur_len) + len = KEYCODE_BUFFER_SIZE-1 - cur_len; + memcpy(buffer + 1 + cur_len, str, len); + buffer[0] += cur_len + len; +} diff --git a/testsuite/ash.tests b/testsuite/ash.tests new file mode 100755 index 0000000..4b6efe4 --- /dev/null +++ b/testsuite/ash.tests @@ -0,0 +1,42 @@ +#!/bin/sh +# +# These are not ash tests, we use ash as a way to test lineedit! +# +# Copyright 2010 by Denys Vlasenko +# Licensed under GPL v2, see file LICENSE for details. + +. ./testing.sh + +# testing "test name" "options" "expected result" "file input" "stdin" + +testing "One byte which is not valid unicode char followed by valid input" \ + "script -q -c 'ash' /dev/null >/dev/null; cat output; rm output" \ + "\ +00000000 3f 2d 0a |?-.| +00000003 +" \ + "" \ + "echo \xff- | hexdump -C >output; exit; exit; exit; exit\n" \ + +testing "30 bytes which are not valid unicode chars followed by valid input" \ + "script -q -c 'ash' /dev/null >/dev/null; cat output; rm output" \ + "\ +00000000 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f |????????????????| +00000010 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 3f 2d 0a |??????????????-.| +00000020 +" \ + "" \ + "echo \xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff- | hexdump -C >output; exit; exit; exit; exit\n" \ + +# Not sure this behavior is perfect: we lose all invalid input which precedes +# arrow keys and such. In this example, \xff\xff are lost +testing "2 bytes which are not valid unicode chars followed by left arrow key" \ + "script -q -c 'ash' /dev/null >/dev/null; cat output; rm output" \ + "\ +00000000 3d 2d 0a |=-.| +00000003 +" \ + "" \ + "echo =+\xff\xff\x1b\x5b\x44- | hexdump -C >output; exit; exit; exit; exit\n" \ + +exit $FAILCOUNT |