diff options
Diffstat (limited to 'miscutils/less.c')
| -rw-r--r-- | miscutils/less.c | 64 |
1 files changed, 35 insertions, 29 deletions
diff --git a/miscutils/less.c b/miscutils/less.c index 174155e95..85a4ae92d 100644 --- a/miscutils/less.c +++ b/miscutils/less.c @@ -191,11 +191,10 @@ static void print_hilite(const char *str) static void data_readlines(void) { - unsigned i; - unsigned n = 1; + unsigned i, pos; + unsigned lineno = 1; int w = width; - /* "remained unused space" in a line (0 if line fills entire width) */ - int rem, last_rem = 1; /* "not 0" */ + char terminated, last_terminated = 1; char *current_line, *p; FILE *fp; @@ -210,41 +209,47 @@ static void data_readlines(void) flines = NULL; if (option_mask32 & FLAG_N) { - w -= 6; + w -= 8; } for (i = 0; !feof(fp) && i <= MAXLINES; i++) { flines = xrealloc(flines, (i+1) * sizeof(char *)); current_line = xmalloc(w); again: p = current_line; - rem = w - 1; - do { + pos = 0; + terminated = 0; + while (1) { int c = getc(fp); + if (c == '\t') pos += (pos^7) & 7; + pos++; + if (pos >= w) { ungetc(c, fp); break; } if (c == EOF) break; - if (c == '\n') break; + if (c == '\n') { terminated = 1; break; } /* NUL is substituted by '\n'! */ if (c == '\0') c = '\n'; *p++ = c; - } while (--rem); + } *p = '\0'; if (fp != stdin) die_if_ferror(fp, filename); /* Corner case: linewrap with only "" wrapping to next line */ /* Looks ugly on screen, so we do not store this empty line */ - if (!last_rem && !current_line[0]) { - last_rem = 1; /* "not 0" */ - n++; + if (!last_terminated && !current_line[0]) { + last_terminated = 1; + lineno++; goto again; } - last_rem = rem; + last_terminated = terminated; if (option_mask32 & FLAG_N) { - flines[i] = xasprintf((n <= 99999) ? "%5u %s" : "%05u %s", - n % 100000, current_line); + /* Width of 7 preserves tab spacing in the text */ + flines[i] = xasprintf( + (lineno <= 9999999) ? "%7u %s" : "%07u %s", + lineno % 10000000, current_line); free(current_line); - if (rem) - n++; + if (terminated) + lineno++; } else { flines[i] = xrealloc(current_line, strlen(current_line)+1); } @@ -339,12 +344,12 @@ static void status_print(void) } static char controls[] = - /**/"\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f" + /* NUL: never encountered; TAB: not converted */ + /**/"\x01\x02\x03\x04\x05\x06\x07\x08" "\x0a\x0b\x0c\x0d\x0e\x0f" "\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f" "\x7f\x9b"; /* DEL and infamous Meta-ESC :( */ static char ctrlconv[] = - /* Note that on input NUL is converted to '\n' ('\x0a') */ - /* Therefore we subst '\n' with '@', not 'J' */ + /* '\n': it's a former NUL - subst with '@', not 'J' */ "\x40\x41\x42\x43\x44\x45\x46\x47\x48\x49\x40\x4b\x4c\x4d\x4e\x4f" "\x50\x51\x52\x53\x54\x55\x56\x57\x58\x59\x5a\x5b\x5c\x5d\x5e\x5f"; @@ -402,10 +407,10 @@ static void print_found(const char *line) } if (!growline) { - printf("%s"CLEAR_2_EOL"\n", str); + printf(CLEAR_2_EOL"%s\n", str); return; } - printf("%s%s"CLEAR_2_EOL"\n", growline, str); + printf(CLEAR_2_EOL"%s%s\n", growline, str); free(growline); } @@ -415,6 +420,7 @@ static void print_ascii(const char *str) char *p; size_t n; + printf(CLEAR_2_EOL); while (*str) { n = strcspn(str, controls); if (n) { @@ -438,7 +444,7 @@ static void print_ascii(const char *str) *p = '\0'; print_hilite(buf); } - printf("%s"CLEAR_2_EOL"\n", str); + puts(str); } /* Print the buffer */ @@ -578,7 +584,7 @@ static void change_file(int direction) reinitialise(); } else { clear_line(); - print_hilite((direction > 0) ? "No next file" : "No previous file"); + print_hilite(direction > 0 ? "No next file" : "No previous file"); } } @@ -644,19 +650,18 @@ static void colon_process(void) static int normalize_match_pos(int match) { match_pos = match; - if (match < 0) - return (match_pos = 0); if (match >= num_matches) -{ match_pos = num_matches - 1; -} + if (match < 0) + return (match_pos = 0); return match_pos; } #if ENABLE_FEATURE_LESS_REGEXP static void goto_match(int match) { - buffer_line(match_lines[normalize_match_pos(match)]); + if (num_matches) + buffer_line(match_lines[normalize_match_pos(match)]); } static void regex_process(void) @@ -1063,6 +1068,7 @@ static void keypress_process(int keypress) regex_process(); break; case 'n': +//printf("HERE 3\n");sleep(1); goto_match(match_pos + 1); break; case 'N': |