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From Rob Sullivan: Fix a segfault with searching, plus some cleanups.
This commit is contained in:
Rob Landley
parent
29ba9796be
commit
a2e98043d5
111
miscutils/less.c
111
miscutils/less.c
@ -108,7 +108,6 @@ static int match_lines[100];
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static int match_pos;
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static int num_matches;
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static int match_backwards;
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static int num_back_match = 1;
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#endif
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/* Needed termios structures */
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@ -653,6 +652,16 @@ static char *process_regex_on_line(char *line, regex_t *pattern)
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return line2;
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}
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static void goto_match(int match)
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{
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/* This goes to a specific match - all line positions of matches are
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stored within the match_lines[] array. */
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if ((match < num_matches) && (match >= 0)) {
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buffer_line(match_lines[match]);
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match_pos = match;
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}
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}
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static void regex_process(void)
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{
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char uncomp_regex[100];
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@ -661,29 +670,29 @@ static void regex_process(void)
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int j = 0;
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regex_t pattern;
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/* Get the uncompiled regular expression from the user */
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clear_line();
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putchar((match_backwards) ? '?' : '/');
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uncomp_regex[0] = 0;
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fgets(uncomp_regex, sizeof(uncomp_regex), inp);
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if (strlen(uncomp_regex) == 1) {
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goto_match(match_backwards ? match_pos - 1 : match_pos + 1);
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buffer_print();
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return;
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}
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uncomp_regex[strlen(uncomp_regex) - 1] = '\0';
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/* Compile the regex and check for errors */
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xregcomp(&pattern, uncomp_regex, 0);
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/* Reset variables */
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match_lines[0] = -1;
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match_pos = 0;
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num_matches = 0;
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match_found = 0;
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/* Get the uncompiled regular expression from the user */
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clear_line();
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putchar((match_backwards) ? '?' : '/');
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uncomp_regex[0] = 0;
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fgets(uncomp_regex, sizeof(uncomp_regex), stdin);
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i = strlen(uncomp_regex);
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if (i > 0) {
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if (uncomp_regex[i-1] == '\n')
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uncomp_regex[i-1] = '\0';
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else
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while((i = getchar()) != '\n' && i != EOF);
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} else
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return;
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/* Compile the regex and check for errors */
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xregcomp(&pattern, uncomp_regex, 0);
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/* Run the regex on each line of the current file here */
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for (i = 0; i <= num_flines; i++) {
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strcpy(current_line, process_regex_on_line(flines[i], &pattern));
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@ -695,42 +704,22 @@ static void regex_process(void)
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}
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num_matches = j;
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if ((match_lines[0] != -1) && (num_flines > height - 2))
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buffer_line(match_lines[0]);
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if ((match_lines[0] != -1) && (num_flines > height - 2)) {
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if (match_backwards) {
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for (i = 0; i < num_matches; i++) {
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if (match_lines[i] > line_pos) {
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match_pos = i - 1;
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buffer_line(match_lines[match_pos]);
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break;
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}
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}
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}
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else
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buffer_line(match_lines[0]);
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}
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else
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buffer_init();
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}
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static void goto_match(int match)
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{
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/* This goes to a specific match - all line positions of matches are
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stored within the match_lines[] array. */
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if ((match < num_matches) && (match >= 0)) {
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buffer_line(match_lines[match]);
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match_pos = match;
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}
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}
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static void search_backwards(void)
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{
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int current_linepos = line_pos;
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int i;
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match_backwards = 1;
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regex_process();
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for (i = 0; i < num_matches; i++) {
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if (match_lines[i] > current_linepos) {
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buffer_line(match_lines[i - num_back_match]);
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break;
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}
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}
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/* Reset variables */
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match_backwards = 0;
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num_back_match = 1;
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}
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#endif
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static void number_process(int first_digit)
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@ -757,8 +746,10 @@ static void number_process(int first_digit)
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keypress = num_input[i];
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num_input[i] = '\0';
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num = strtol(num_input, &endptr, 10);
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if (endptr==num_input || *endptr!='\0' || num < 1 || num > MAXLINES)
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goto END;
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if (endptr==num_input || *endptr!='\0' || num < 1 || num > MAXLINES) {
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buffer_print();
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return;
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}
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/* We now know the number and the letter entered, so we process them */
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switch (keypress) {
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@ -777,22 +768,20 @@ static void number_process(int first_digit)
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break;
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#ifdef CONFIG_FEATURE_LESS_REGEXP
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case 'n':
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goto_match(match_pos + num - 1);
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goto_match(match_pos + num);
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break;
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case '/':
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match_backwards = 0;
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regex_process();
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goto_match(num - 1);
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break;
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case '?':
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num_back_match = num;
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search_backwards();
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match_backwards = 1;
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regex_process();
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break;
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#endif
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default:
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break;
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}
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END:
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buffer_print();
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}
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#ifdef CONFIG_FEATURE_LESS_FLAGCS
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@ -1087,6 +1076,7 @@ static void keypress_process(int keypress)
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#endif
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#ifdef CONFIG_FEATURE_LESS_REGEXP
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case '/':
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match_backwards = 0;
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regex_process();
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buffer_print();
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break;
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@ -1099,7 +1089,8 @@ static void keypress_process(int keypress)
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buffer_print();
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break;
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case '?':
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search_backwards();
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match_backwards = 1;
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regex_process();
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buffer_print();
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break;
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#endif
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