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authorJakob Gruber <jakob.gruber@gmail.com>2011-02-19 23:23:42 +0100
committerDan McGee <dan@archlinux.org>2011-04-20 17:41:13 -0500
commit0152266dd3ce0393f5e9519aaa1d7da7e6051694 (patch)
treed5232041a10b2e9446cfbdcff2d57c9b6175bbb0
parent50de7019c0bbd917b0a1717566ddad41c7c6db9e (diff)
Table formatted output functions
table_display takes a list of lists of strings (representing the table cells) and displays them formatted as a table. The exact format depends on the longest string in each column. Signed-off-by: Jakob Gruber <jakob.gruber@gmail.com> Signed-off-by: Dan McGee <dan@archlinux.org>
-rw-r--r--src/pacman/util.c110
-rw-r--r--src/pacman/util.h1
2 files changed, 111 insertions, 0 deletions
diff --git a/src/pacman/util.c b/src/pacman/util.c
index 8d5ada61..b70bfe58 100644
--- a/src/pacman/util.c
+++ b/src/pacman/util.c
@@ -455,6 +455,116 @@ void string_display(const char *title, const char *string)
printf("\n");
}
+static void table_print_line(const alpm_list_t *line,
+ const alpm_list_t *formats)
+{
+ const alpm_list_t *curformat = formats;
+ const alpm_list_t *curcell = line;
+
+ while(curcell && curformat) {
+ printf(alpm_list_getdata(curformat), alpm_list_getdata(curcell));
+ curcell = alpm_list_next(curcell);
+ curformat = alpm_list_next(curformat);
+ }
+
+ printf("\n");
+}
+
+/* creates format strings by checking max cell lengths in cols */
+static alpm_list_t *table_create_format(const alpm_list_t *header,
+ const alpm_list_t *rows)
+{
+ alpm_list_t *longest_str, *longest_strs = NULL;
+ alpm_list_t *formats = NULL;
+ const alpm_list_t *i, *row, *cell;
+ char *str, *formatstr;
+ const int padding = 2;
+ int colwidth, totalwidth = 0;
+ int curcol = 0;
+
+ /* header determines column count and initial values of longest_strs */
+ for(i = header; i; i = alpm_list_next(i)) {
+ longest_strs = alpm_list_add(longest_strs, alpm_list_getdata(i));
+ }
+
+ /* now find the longest string in each column */
+ for(longest_str = longest_strs; longest_str;
+ longest_str = alpm_list_next(longest_str), curcol++) {
+ for(i = rows; i; i = alpm_list_next(i)) {
+ row = alpm_list_getdata(i);
+ cell = alpm_list_nth(row, curcol);
+ str = alpm_list_getdata(cell);
+
+ if(strlen(str) > strlen(alpm_list_getdata(longest_str))) {
+ longest_str->data = str;
+ }
+ }
+ }
+
+ /* now use the column width info to generate format strings */
+ for(i = longest_strs; i; i = alpm_list_next(i)) {
+ colwidth = strlen(alpm_list_getdata(i)) + padding;
+ totalwidth += colwidth;
+
+ /* right align the last column for a cleaner table display */
+ str = (alpm_list_next(i) != NULL) ? "%%-%ds" : "%%%ds";
+ pm_asprintf(&formatstr, str, colwidth);
+
+ formats = alpm_list_add(formats, formatstr);
+ }
+
+ alpm_list_free(longest_strs);
+
+ /* return NULL if terminal is not wide enough */
+ if(totalwidth > getcols()) {
+ fprintf(stderr, _("insufficient columns available for table display\n"));
+ FREELIST(formats);
+ return(NULL);
+ }
+
+ return(formats);
+}
+
+/** Displays the list in table format
+ *
+ * @param title the tables title
+ * @param header the column headers. column count is determined by the nr
+ * of headers
+ * @param rows the rows to display as a list of lists of strings. the outer
+ * list represents the rows, the inner list the cells (= columns)
+ *
+ * @return -1 if not enough terminal cols available, else 0
+ */
+int table_display(const char *title, const alpm_list_t *header,
+ const alpm_list_t *rows)
+{
+ const alpm_list_t *i;
+ alpm_list_t *formats;
+
+ if(rows == NULL || header == NULL) {
+ return(0);
+ }
+
+ formats = table_create_format(header, rows);
+ if(formats == NULL) {
+ return(-1);
+ }
+
+ if(title != NULL) {
+ printf("%s\n\n", title);
+ }
+
+ table_print_line(header, formats);
+ printf("\n");
+
+ for(i = rows; i; i = alpm_list_next(i)) {
+ table_print_line(alpm_list_getdata(i), formats);
+ }
+
+ FREELIST(formats);
+ return(0);
+}
+
void list_display(const char *title, const alpm_list_t *list)
{
const alpm_list_t *i;
diff --git a/src/pacman/util.h b/src/pacman/util.h
index 6a20ba4f..d8ae7d80 100644
--- a/src/pacman/util.h
+++ b/src/pacman/util.h
@@ -53,6 +53,7 @@ char *strreplace(const char *str, const char *needle, const char *replace);
alpm_list_t *strsplit(const char *str, const char splitchar);
void string_display(const char *title, const char *string);
double humanize_size(off_t bytes, const char target_unit, int long_labels, const char **label);
+int table_display(const char *title, const alpm_list_t *header, const alpm_list_t *rows);
void list_display(const char *title, const alpm_list_t *list);
void list_display_linebreak(const char *title, const alpm_list_t *list);
void display_targets(const alpm_list_t *pkgs, int install);