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-rw-r--r--utils/libsmartcols/src/print-api.c211
1 files changed, 211 insertions, 0 deletions
diff --git a/utils/libsmartcols/src/print-api.c b/utils/libsmartcols/src/print-api.c
new file mode 100644
index 0000000..9a9f2df
--- /dev/null
+++ b/utils/libsmartcols/src/print-api.c
@@ -0,0 +1,211 @@
+#include "smartcolsP.h"
+
+/**
+ * scola_table_print_range:
+ * @tb: table
+ * @start: first printed line or NULL to print from the begin of the table
+ * @end: last printed line or NULL to print all from start.
+ *
+ * If the start is the first line in the table than prints table header too.
+ * The header is printed only once. This does not work for trees.
+ *
+ * Returns: 0, a negative value in case of an error.
+ */
+int scols_table_print_range( struct libscols_table *tb,
+ struct libscols_line *start,
+ struct libscols_line *end)
+{
+ struct libscols_buffer *buf = NULL;
+ struct libscols_iter itr;
+ int rc;
+
+ if (scols_table_is_tree(tb))
+ return -EINVAL;
+
+ DBG(TAB, ul_debugobj(tb, "printing range from API"));
+
+ rc = __scols_initialize_printing(tb, &buf);
+ if (rc)
+ return rc;
+
+ if (start) {
+ itr.direction = SCOLS_ITER_FORWARD;
+ itr.head = &tb->tb_lines;
+ itr.p = &start->ln_lines;
+ } else
+ scols_reset_iter(&itr, SCOLS_ITER_FORWARD);
+
+ if (!start || itr.p == tb->tb_lines.next) {
+ rc = __scols_print_header(tb, buf);
+ if (rc)
+ goto done;
+ }
+
+ rc = __scols_print_range(tb, buf, &itr, end);
+done:
+ __scols_cleanup_printing(tb, buf);
+ return rc;
+}
+
+/**
+ * scols_table_print_range_to_string:
+ * @tb: table
+ * @start: first printed line or NULL to print from the beginning of the table
+ * @end: last printed line or NULL to print all from start.
+ * @data: pointer to the beginning of a memory area to print to
+ *
+ * The same as scols_table_print_range(), but prints to @data instead of
+ * stream.
+ *
+ * Returns: 0, a negative value in case of an error.
+ */
+#ifdef HAVE_OPEN_MEMSTREAM
+int scols_table_print_range_to_string( struct libscols_table *tb,
+ struct libscols_line *start,
+ struct libscols_line *end,
+ char **data)
+{
+ FILE *stream, *old_stream;
+ size_t sz;
+ int rc;
+
+ if (!tb)
+ return -EINVAL;
+
+ DBG(TAB, ul_debugobj(tb, "printing range to string"));
+
+ /* create a stream for output */
+ stream = open_memstream(data, &sz);
+ if (!stream)
+ return -ENOMEM;
+
+ old_stream = scols_table_get_stream(tb);
+ scols_table_set_stream(tb, stream);
+ rc = scols_table_print_range(tb, start, end);
+ fclose(stream);
+ scols_table_set_stream(tb, old_stream);
+
+ return rc;
+}
+#else
+int scols_table_print_range_to_string(
+ struct libscols_table *tb __attribute__((__unused__)),
+ struct libscols_line *start __attribute__((__unused__)),
+ struct libscols_line *end __attribute__((__unused__)),
+ char **data __attribute__((__unused__)))
+{
+ return -ENOSYS;
+}
+#endif
+
+static int do_print_table(struct libscols_table *tb, int *is_empty)
+{
+ int rc = 0;
+ struct libscols_buffer *buf = NULL;
+
+ if (!tb)
+ return -EINVAL;
+
+ DBG(TAB, ul_debugobj(tb, "printing"));
+ if (is_empty)
+ *is_empty = 0;
+
+ if (list_empty(&tb->tb_columns)) {
+ DBG(TAB, ul_debugobj(tb, "error -- no columns"));
+ return -EINVAL;
+ }
+ if (list_empty(&tb->tb_lines)) {
+ DBG(TAB, ul_debugobj(tb, "ignore -- no lines"));
+ if (scols_table_is_json(tb)) {
+ fput_table_open(tb);
+ fput_table_close(tb);
+ } else if (is_empty)
+ *is_empty = 1;
+ return 0;
+ }
+
+ tb->header_printed = 0;
+ rc = __scols_initialize_printing(tb, &buf);
+ if (rc)
+ return rc;
+
+ fput_table_open(tb);
+
+ if (tb->format == SCOLS_FMT_HUMAN)
+ __scols_print_title(tb);
+
+ rc = __scols_print_header(tb, buf);
+ if (rc)
+ goto done;
+
+ if (scols_table_is_tree(tb))
+ rc = __scols_print_tree(tb, buf);
+ else
+ rc = __scols_print_table(tb, buf);
+
+ fput_table_close(tb);
+done:
+ __scols_cleanup_printing(tb, buf);
+ return rc;
+}
+
+/**
+ * scols_print_table:
+ * @tb: table
+ *
+ * Prints the table to the output stream and terminate by \n.
+ *
+ * Returns: 0, a negative value in case of an error.
+ */
+int scols_print_table(struct libscols_table *tb)
+{
+ int empty = 0;
+ int rc = do_print_table(tb, &empty);
+
+ if (rc == 0 && !empty)
+ fputc('\n', tb->out);
+ return rc;
+}
+
+/**
+ * scols_print_table_to_string:
+ * @tb: table
+ * @data: pointer to the beginning of a memory area to print to
+ *
+ * Prints the table to @data.
+ *
+ * Returns: 0, a negative value in case of an error.
+ */
+#ifdef HAVE_OPEN_MEMSTREAM
+int scols_print_table_to_string(struct libscols_table *tb, char **data)
+{
+ FILE *stream, *old_stream;
+ size_t sz;
+ int rc;
+
+ if (!tb)
+ return -EINVAL;
+
+ DBG(TAB, ul_debugobj(tb, "printing to string"));
+
+ /* create a stream for output */
+ stream = open_memstream(data, &sz);
+ if (!stream)
+ return -ENOMEM;
+
+ old_stream = scols_table_get_stream(tb);
+ scols_table_set_stream(tb, stream);
+ rc = do_print_table(tb, NULL);
+ fclose(stream);
+ scols_table_set_stream(tb, old_stream);
+
+ return rc;
+}
+#else
+int scols_print_table_to_string(
+ struct libscols_table *tb __attribute__((__unused__)),
+ char **data __attribute__((__unused__)))
+{
+ return -ENOSYS;
+}
+#endif