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authorDan McGee <dan@archlinux.org>2011-10-10 21:26:17 -0500
committerDan McGee <dan@archlinux.org>2011-10-12 14:18:38 -0500
commit61c6ae01b3315c5db38ef5d313ac6f0b75fe2209 (patch)
treeedc99d6fd4ee10353e7231d4fcdb85042380b3d6 /src
parentd3d3b861ac2c4ce63c306e00395945bfa3c1b6c6 (diff)
VerbosePkgLists: format table lines in i18n-compatible way
This had the unfortunate implementation detail that depended on the strings having 1 byte == 1 column hold true. As we know, this is not at all the case once you move past the base ASCII character set. Reimplement this whole thing so it doesn't depend on format strings at all. Instead, simply calculate the max column widths, and then when displaying each row add the correct amount of padding using UTF-8 safe string length functions. Before: 名字 旧版本新版本 净变化 下载大小 libgee 0.6.2.1-1 0.60 MiB 0.10 MiB libsocialweb 0.25.19-2 1.92 MiB 0.23 MiB folks 0.6.3.2-1 1.38 MiB 0.25 MiB After: 名字 旧版本 新版本 净变化 下载大小 libgee 0.6.2.1-1 0.60 MiB 0.10 MiB libsocialweb 0.25.19-2 1.92 MiB 0.23 MiB folks 0.6.3.2-1 1.38 MiB 0.25 MiB Signed-off-by: Dan McGee <dan@archlinux.org>
Diffstat (limited to 'src')
-rw-r--r--src/pacman/util.c91
1 files changed, 48 insertions, 43 deletions
diff --git a/src/pacman/util.c b/src/pacman/util.c
index 79fb54dc..ee8fe3ff 100644
--- a/src/pacman/util.c
+++ b/src/pacman/util.c
@@ -488,34 +488,47 @@ void string_display(const char *title, const char *string)
}
static void table_print_line(const alpm_list_t *line,
- const alpm_list_t *formats)
+ size_t colcount, size_t *widths)
{
- 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);
+ size_t i;
+ const alpm_list_t *curcell;
+
+ for(i = 0, curcell = line; curcell && i < colcount;
+ i++, curcell = alpm_list_next(curcell)) {
+ const char *value = curcell->data;
+ size_t len = string_length(value);
+ /* silly printf requires padding size to be an int */
+ int padding = (int)widths[i] - (int)len;
+ if(padding < 0) {
+ padding = 0;
+ }
+ /* left-align all but the last column */
+ if(i + 1 < colcount) {
+ printf("%s%*s", value, padding, "");
+ } else {
+ printf("%*s%s", padding, "", value);
+ }
}
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)
+/* find the max string width of each column */
+static size_t table_calc_widths(const alpm_list_t *header,
+ const alpm_list_t *rows, size_t totalcols, size_t **widths)
{
- alpm_list_t *formats = NULL;
const alpm_list_t *i;
const unsigned short padding = 2;
- size_t curcol, totalcols, totalwidth = 0;
+ size_t curcol, totalwidth = 0;
size_t *colwidths;
- totalcols = alpm_list_count(header);
+ if(totalcols <= 0) {
+ return 0;
+ }
+
colwidths = malloc(totalcols * sizeof(size_t));
if(!colwidths) {
- return NULL;
+ return 0;
}
/* header determines column count and initial values of longest_strs */
for(i = header, curcol = 0; i; i = alpm_list_next(i), curcol++) {
@@ -536,30 +549,16 @@ static alpm_list_t *table_create_format(const alpm_list_t *header,
}
}
- /* now use the column width info to generate format strings */
- for(curcol = 0; curcol < totalcols; curcol++) {
- const char *display;
- char *formatstr;
- size_t colwidth = colwidths[curcol] + padding;
- totalwidth += colwidth;
-
- /* right align the last column for a cleaner table display */
- display = (curcol + 1 < totalcols) ? "%%-%ds" : "%%%ds";
- pm_asprintf(&formatstr, display, colwidth);
-
- formats = alpm_list_add(formats, formatstr);
- }
-
- free(colwidths);
-
- /* return NULL if terminal is not wide enough */
- if(totalwidth > getcols()) {
- fprintf(stderr, _("insufficient columns available for table display\n"));
- FREELIST(formats);
- return NULL;
+ for(i = header, curcol = 0; i; i = alpm_list_next(i), curcol++) {
+ /* pad everything but the last column */
+ if(curcol + 1 < totalcols) {
+ colwidths[curcol] += padding;
+ }
+ totalwidth += colwidths[curcol];
}
- return formats;
+ *widths = colwidths;
+ return totalwidth;
}
/** Displays the list in table format
@@ -576,14 +575,20 @@ 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;
+ size_t *widths = NULL, totalcols, totalwidth;
if(rows == NULL || header == NULL) {
return 0;
}
- formats = table_create_format(header, rows);
- if(formats == NULL) {
+ totalcols = alpm_list_count(header);
+ totalwidth = table_calc_widths(header, rows, totalcols, &widths);
+ /* return -1 if terminal is not wide enough */
+ if(totalwidth > getcols()) {
+ fprintf(stderr, _("insufficient columns available for table display\n"));
+ return -1;
+ }
+ if(!totalwidth || !widths) {
return -1;
}
@@ -591,14 +596,14 @@ int table_display(const char *title, const alpm_list_t *header,
printf("%s\n\n", title);
}
- table_print_line(header, formats);
+ table_print_line(header, totalcols, widths);
printf("\n");
for(i = rows; i; i = alpm_list_next(i)) {
- table_print_line(alpm_list_getdata(i), formats);
+ table_print_line(alpm_list_getdata(i), totalcols, widths);
}
- FREELIST(formats);
+ free(widths);
return 0;
}