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
---
src/pacman/util.c | 108 +++++++++++++++++++++++++++++++++++++++++++++++++++++
src/pacman/util.h | 1 +
2 files changed, 109 insertions(+), 0 deletions(-)
diff --git a/src/pacman/util.c b/src/pacman/util.c
index 85d2d8c..8f7b5e5 100644
--- a/src/pacman/util.c
+++ b/src/pacman/util.c
@@ -435,6 +435,114 @@ 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 a format string by checking max cell lengths in rows */
+static alpm_list_t *table_create_format(const alpm_list_t *rows)
+{
+ alpm_list_t *format, *curformat;
+ const alpm_list_t *currow, *curcell;
+ char *str, *formatstr;
+ const int padding = 2;
+ int cols, neededcols = 0;
+
+ /* initial format list element */
+ format = alpm_list_add(NULL, NULL);
+
+ /* go through each cell and store the longest string for each
+ * column in the format list */
+ currow = rows;
+ while(currow != NULL) {
+
+ /* starting on new row, reset format pointer to first column */
+ curformat = format;
+
+ /* loop through all row cells and update format pointer if necessary */
+ curcell = alpm_list_getdata(currow);
+ while(curcell != NULL) {
+ if(curformat == NULL) {
+ curformat = alpm_list_last(alpm_list_add(format, NULL));
+ }
+
+ str = alpm_list_getdata(curcell);
+ if(curformat->data == NULL ||
+ strlen(str) > strlen(alpm_list_getdata(curformat)))
+ curformat->data = str;
+
+ curformat = alpm_list_next(curformat);
+ curcell = alpm_list_next(curcell);
+ }
+
+ currow = alpm_list_next(currow);
+ }
+
+ /* now use the column width info to generate format strings */
+ curformat = format;
+ while(curformat != NULL) {
+ cols = strlen(curformat->data) + padding;
+ neededcols += cols;
+
+ str = (alpm_list_next(curformat) != NULL) ? "%%-%ds" : "%%%ds";
+ pm_asprintf(&formatstr, str, cols);
+
+ curformat->data = formatstr;
+ curformat = alpm_list_next(curformat);
+ }
+
+ /* return NULL if terminal is not wide enough */
+ if(neededcols > getcols()) {
+ FREELIST(format);
+ return NULL;
+ }
+
+ return format;
+}
+
+/** Displays the list in table format
+ *
+ * @param title the tables title
+ * @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 *rows)
+{
+ alpm_list_t *i, *formats;
+
+ if(rows == NULL)
+ return 0;
+
+ formats = table_create_format(rows);
+ if(formats == NULL) {
+ return -1;
+ }
+
+ if(title != NULL) {
+ printf("%s\n\n", title);
+ }
+
+ for(i = alpm_list_first(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 ed03c13..494becf 100644
--- a/src/pacman/util.h
+++ b/src/pacman/util.h
@@ -56,6 +56,7 @@ char *size_to_human_string_mb(off_t bytes);
char *size_to_human_string_kb(off_t bytes);
char *size_to_human_string_short(off_t bytes);
void string_display(const char *title, const char *string);
+int table_display(const char *title, 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);
--
1.7.4.1