diff options
Diffstat (limited to 'www/git.causal.agency/cgit/ui-ssdiff.c')
| -rw-r--r-- | www/git.causal.agency/cgit/ui-ssdiff.c | 420 |
1 files changed, 0 insertions, 420 deletions
diff --git a/www/git.causal.agency/cgit/ui-ssdiff.c b/www/git.causal.agency/cgit/ui-ssdiff.c deleted file mode 100644 index af8bc9e0..00000000 --- a/www/git.causal.agency/cgit/ui-ssdiff.c +++ /dev/null @@ -1,420 +0,0 @@ -#include "cgit.h" -#include "ui-ssdiff.h" -#include "html.h" -#include "ui-shared.h" -#include "ui-diff.h" - -extern int use_ssdiff; - -static int current_old_line, current_new_line; -static int **L = NULL; - -struct deferred_lines { - int line_no; - char *line; - struct deferred_lines *next; -}; - -static struct deferred_lines *deferred_old, *deferred_old_last; -static struct deferred_lines *deferred_new, *deferred_new_last; - -static void create_or_reset_lcs_table(void) -{ - int i; - - if (L != NULL) { - memset(*L, 0, sizeof(int) * MAX_SSDIFF_SIZE); - return; - } - - // xcalloc will die if we ran out of memory; - // not very helpful for debugging - L = (int**)xcalloc(MAX_SSDIFF_M, sizeof(int *)); - *L = (int*)xcalloc(MAX_SSDIFF_SIZE, sizeof(int)); - - for (i = 1; i < MAX_SSDIFF_M; i++) { - L[i] = *L + i * MAX_SSDIFF_N; - } -} - -static char *longest_common_subsequence(char *A, char *B) -{ - int i, j, ri; - int m = strlen(A); - int n = strlen(B); - int tmp1, tmp2; - int lcs_length; - char *result; - - // We bail if the lines are too long - if (m >= MAX_SSDIFF_M || n >= MAX_SSDIFF_N) - return NULL; - - create_or_reset_lcs_table(); - - for (i = m; i >= 0; i--) { - for (j = n; j >= 0; j--) { - if (A[i] == '\0' || B[j] == '\0') { - L[i][j] = 0; - } else if (A[i] == B[j]) { - L[i][j] = 1 + L[i + 1][j + 1]; - } else { - tmp1 = L[i + 1][j]; - tmp2 = L[i][j + 1]; - L[i][j] = (tmp1 > tmp2 ? tmp1 : tmp2); - } - } - } - - lcs_length = L[0][0]; - result = xmalloc(lcs_length + 2); - memset(result, 0, sizeof(*result) * (lcs_length + 2)); - - ri = 0; - i = 0; - j = 0; - while (i < m && j < n) { - if (A[i] == B[j]) { - result[ri] = A[i]; - ri += 1; - i += 1; - j += 1; - } else if (L[i + 1][j] >= L[i][j + 1]) { - i += 1; - } else { - j += 1; - } - } - - return result; -} - -static int line_from_hunk(char *line, char type) -{ - char *buf1, *buf2; - int len, res; - - buf1 = strchr(line, type); - if (buf1 == NULL) - return 0; - buf1 += 1; - buf2 = strchr(buf1, ','); - if (buf2 == NULL) - return 0; - len = buf2 - buf1; - buf2 = xmalloc(len + 1); - strlcpy(buf2, buf1, len + 1); - res = atoi(buf2); - free(buf2); - return res; -} - -static char *replace_tabs(char *line) -{ - char *prev_buf = line; - char *cur_buf; - size_t linelen = strlen(line); - int n_tabs = 0; - int i; - char *result; - size_t result_len; - - if (linelen == 0) { - result = xmalloc(1); - result[0] = '\0'; - return result; - } - - for (i = 0; i < linelen; i++) { - if (line[i] == '\t') - n_tabs += 1; - } - result_len = linelen + n_tabs * 8; - result = xmalloc(result_len + 1); - result[0] = '\0'; - - for (;;) { - cur_buf = strchr(prev_buf, '\t'); - if (!cur_buf) { - linelen = strlen(result); - strlcpy(&result[linelen], prev_buf, result_len - linelen + 1); - break; - } else { - linelen = strlen(result); - strlcpy(&result[linelen], prev_buf, cur_buf - prev_buf + 1); - linelen = strlen(result); - memset(&result[linelen], ' ', 8 - (linelen % 8)); - result[linelen + 8 - (linelen % 8)] = '\0'; - } - prev_buf = cur_buf + 1; - } - return result; -} - -static int calc_deferred_lines(struct deferred_lines *start) -{ - struct deferred_lines *item = start; - int result = 0; - while (item) { - result += 1; - item = item->next; - } - return result; -} - -static void deferred_old_add(char *line, int line_no) -{ - struct deferred_lines *item = xmalloc(sizeof(struct deferred_lines)); - item->line = xstrdup(line); - item->line_no = line_no; - item->next = NULL; - if (deferred_old) { - deferred_old_last->next = item; - deferred_old_last = item; - } else { - deferred_old = deferred_old_last = item; - } -} - -static void deferred_new_add(char *line, int line_no) -{ - struct deferred_lines *item = xmalloc(sizeof(struct deferred_lines)); - item->line = xstrdup(line); - item->line_no = line_no; - item->next = NULL; - if (deferred_new) { - deferred_new_last->next = item; - deferred_new_last = item; - } else { - deferred_new = deferred_new_last = item; - } -} - -static void print_part_with_lcs(char *class, char *line, char *lcs) -{ - int line_len = strlen(line); - int i, j; - char c[2] = " "; - int same = 1; - - j = 0; - for (i = 0; i < line_len; i++) { - c[0] = line[i]; - if (same) { - if (line[i] == lcs[j]) - j += 1; - else { - same = 0; - htmlf("<span class='%s'>", class); - } - } else if (line[i] == lcs[j]) { - same = 1; - html("</span>"); - j += 1; - } - html_txt(c); - } - if (!same) - html("</span>"); -} - -static void print_ssdiff_line(char *class, - int old_line_no, - char *old_line, - int new_line_no, - char *new_line, int individual_chars) -{ - char *lcs = NULL; - - if (old_line) - old_line = replace_tabs(old_line + 1); - if (new_line) - new_line = replace_tabs(new_line + 1); - if (individual_chars && old_line && new_line) - lcs = longest_common_subsequence(old_line, new_line); - html("<tr>\n"); - if (old_line_no > 0) { - struct diff_filespec *old_file = cgit_get_current_old_file(); - char *lineno_str = fmt("n%d", old_line_no); - char *id_str = fmt("id=%s#%s", is_null_oid(&old_file->oid)?"HEAD":oid_to_hex(old_rev_oid), lineno_str); - char *fileurl = cgit_fileurl(ctx.repo->url, "tree", old_file->path, id_str); - html("<td class='lineno'><a href='"); - html(fileurl); - htmlf("'>%s</a>", lineno_str + 1); - html("</td>"); - htmlf("<td class='%s'>", class); - free(fileurl); - } else if (old_line) - htmlf("<td class='lineno'></td><td class='%s'>", class); - else - htmlf("<td class='lineno'></td><td class='%s_dark'>", class); - if (old_line) { - if (lcs) - print_part_with_lcs("del", old_line, lcs); - else - html_txt(old_line); - } - - html("</td>\n"); - if (new_line_no > 0) { - struct diff_filespec *new_file = cgit_get_current_new_file(); - char *lineno_str = fmt("n%d", new_line_no); - char *id_str = fmt("id=%s#%s", is_null_oid(&new_file->oid)?"HEAD":oid_to_hex(new_rev_oid), lineno_str); - char *fileurl = cgit_fileurl(ctx.repo->url, "tree", new_file->path, id_str); - html("<td class='lineno'><a href='"); - html(fileurl); - htmlf("'>%s</a>", lineno_str + 1); - html("</td>"); - htmlf("<td class='%s'>", class); - free(fileurl); - } else if (new_line) - htmlf("<td class='lineno'></td><td class='%s'>", class); - else - htmlf("<td class='lineno'></td><td class='%s_dark'>", class); - if (new_line) { - if (lcs) - print_part_with_lcs("add", new_line, lcs); - else - html_txt(new_line); - } - - html("</td></tr>"); - if (lcs) - free(lcs); - if (new_line) - free(new_line); - if (old_line) - free(old_line); -} - -static void print_deferred_old_lines(void) -{ - struct deferred_lines *iter_old, *tmp; - iter_old = deferred_old; - while (iter_old) { - print_ssdiff_line("del", iter_old->line_no, - iter_old->line, -1, NULL, 0); - tmp = iter_old->next; - free(iter_old); - iter_old = tmp; - } -} - -static void print_deferred_new_lines(void) -{ - struct deferred_lines *iter_new, *tmp; - iter_new = deferred_new; - while (iter_new) { - print_ssdiff_line("add", -1, NULL, - iter_new->line_no, iter_new->line, 0); - tmp = iter_new->next; - free(iter_new); - iter_new = tmp; - } -} - -static void print_deferred_changed_lines(void) -{ - struct deferred_lines *iter_old, *iter_new, *tmp; - int n_old_lines = calc_deferred_lines(deferred_old); - int n_new_lines = calc_deferred_lines(deferred_new); - int individual_chars = (n_old_lines == n_new_lines ? 1 : 0); - - iter_old = deferred_old; - iter_new = deferred_new; - while (iter_old || iter_new) { - if (iter_old && iter_new) - print_ssdiff_line("changed", iter_old->line_no, - iter_old->line, - iter_new->line_no, iter_new->line, - individual_chars); - else if (iter_old) - print_ssdiff_line("changed", iter_old->line_no, - iter_old->line, -1, NULL, 0); - else if (iter_new) - print_ssdiff_line("changed", -1, NULL, - iter_new->line_no, iter_new->line, 0); - if (iter_old) { - tmp = iter_old->next; - free(iter_old); - iter_old = tmp; - } - - if (iter_new) { - tmp = iter_new->next; - free(iter_new); - iter_new = tmp; - } - } -} - -void cgit_ssdiff_print_deferred_lines(void) -{ - if (!deferred_old && !deferred_new) - return; - if (deferred_old && !deferred_new) - print_deferred_old_lines(); - else if (!deferred_old && deferred_new) - print_deferred_new_lines(); - else - print_deferred_changed_lines(); - deferred_old = deferred_old_last = NULL; - deferred_new = deferred_new_last = NULL; -} - -/* - * print a single line returned from xdiff - */ -void cgit_ssdiff_line_cb(char *line, int len) -{ - char c = line[len - 1]; - line[len - 1] = '\0'; - if (line[0] == '@') { - current_old_line = line_from_hunk(line, '-'); - current_new_line = line_from_hunk(line, '+'); - } - - if (line[0] == ' ') { - if (deferred_old || deferred_new) - cgit_ssdiff_print_deferred_lines(); - print_ssdiff_line("ctx", current_old_line, line, - current_new_line, line, 0); - current_old_line += 1; - current_new_line += 1; - } else if (line[0] == '+') { - deferred_new_add(line, current_new_line); - current_new_line += 1; - } else if (line[0] == '-') { - deferred_old_add(line, current_old_line); - current_old_line += 1; - } else if (line[0] == '@') { - html("<tr><td colspan='4' class='hunk'>"); - html_txt(line); - html("</td></tr>"); - } else { - html("<tr><td colspan='4' class='ctx'>"); - html_txt(line); - html("</td></tr>"); - } - line[len - 1] = c; -} - -void cgit_ssdiff_header_begin(void) -{ - current_old_line = -1; - current_new_line = -1; - html("<tr><td class='space' colspan='4'><div></div></td></tr>"); - html("<tr><td class='head' colspan='4'>"); -} - -void cgit_ssdiff_header_end(void) -{ - html("</td></tr>"); -} - -void cgit_ssdiff_footer(void) -{ - if (deferred_old || deferred_new) - cgit_ssdiff_print_deferred_lines(); - html("<tr><td class='foot' colspan='4'></td></tr>"); -} |