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| author | Denis Vlasenko | 2007-02-14 20:49:14 +0000 |
|---|---|---|
| committer | Denis Vlasenko | 2007-02-14 20:49:14 +0000 |
| commit | b30418ac19a45d188cb7c2e2f7e5879aa5f1f169 (patch) | |
| tree | d8c63450bd048ad6f9fe5e085a09ffc7e8320752 | |
| parent | ae30210d909ba52328385b75891754b0c93ec780 (diff) | |
| download | busybox-b30418ac19a45d188cb7c2e2f7e5879aa5f1f169.zip busybox-b30418ac19a45d188cb7c2e2f7e5879aa5f1f169.tar.gz | |
less: support xterm's home/end; improve forward search
| -rw-r--r-- | miscutils/less.c | 36 |
1 files changed, 28 insertions, 8 deletions
diff --git a/miscutils/less.c b/miscutils/less.c index 9aae81f..1be5d35 100644 --- a/miscutils/less.c +++ b/miscutils/less.c @@ -48,6 +48,8 @@ enum { REAL_PAGE_DOWN = '6', REAL_KEY_HOME = '7', REAL_KEY_END = '8', + REAL_KEY_HOME_XTERM = 'H', + REAL_KEY_END_XTERM = 'F', /* These are the special codes assigned by this program to the special keys */ KEY_UP = 20, @@ -196,6 +198,7 @@ static void read_lines(void) terminated = 0; while (1) { char c; + /* if no unprocessed chars left, eat more */ if (readpos >= readeof) { ndelay_on(0); eof_error = safe_read(0, readbuf, sizeof(readbuf)); @@ -507,6 +510,8 @@ static void buffer_line(int linenum) read_lines(); if (linenum + max_displayed_line > max_fline) linenum = max_fline - max_displayed_line + TILDES; + if (linenum < 0) + linenum = 0; cur_fline = linenum; buffer_fill_and_print(); } @@ -607,6 +612,10 @@ static int less_getch(void) i = input[2] - REAL_PAGE_UP; if (i < 4) return 24 + i; + if (input[2] == REAL_KEY_HOME_XTERM) + return KEY_HOME; + if (input[2] == REAL_KEY_END_XTERM) + return KEY_END; return 0; } /* Reject almost all control chars */ @@ -735,20 +744,30 @@ static void colon_process(void) } #if ENABLE_FEATURE_LESS_REGEXP -static int normalize_match_pos(int match) +static void normalize_match_pos(int match) { - match_pos = match; if (match >= num_matches) - match_pos = num_matches - 1; + match = num_matches - 1; if (match < 0) - match_pos = 0; - return match_pos; + match = 0; + match_pos = match; } static void goto_match(int match) { - if (num_matches) - buffer_line(match_lines[normalize_match_pos(match)]); + if (!pattern_valid) + return; + if (match < 0) + match = 0; + /* Try to find next match if eof isn't reached yet */ + if (match >= num_matches && eof_error > 0) { + cur_fline = MAXLINES; /* look as far as needed */ + read_lines(); + } + if (num_matches) { + normalize_match_pos(match); + buffer_line(match_lines[match_pos]); + } } static void fill_match_lines(unsigned pos) @@ -817,7 +836,8 @@ static void regex_process(void) } if (option_mask32 & LESS_STATE_MATCH_BACKWARDS) match_pos--; - buffer_line(match_lines[normalize_match_pos(match_pos)]); + normalize_match_pos(match_pos); + buffer_line(match_lines[match_pos]); } #endif |