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-rw-r--r--libsmartcols/samples/fromfile.c347
1 files changed, 347 insertions, 0 deletions
diff --git a/libsmartcols/samples/fromfile.c b/libsmartcols/samples/fromfile.c
new file mode 100644
index 0000000..0fdc929
--- /dev/null
+++ b/libsmartcols/samples/fromfile.c
@@ -0,0 +1,347 @@
+/*
+ * Copyright (C) 2016 Karel Zak <kzak@redhat.com>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ */
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <getopt.h>
+
+#include "c.h"
+#include "nls.h"
+#include "strutils.h"
+#include "xalloc.h"
+#include "optutils.h"
+
+#include "libsmartcols.h"
+
+struct column_flag {
+ const char *name;
+ int mask;
+};
+
+static const struct column_flag flags[] = {
+ { "trunc", SCOLS_FL_TRUNC },
+ { "tree", SCOLS_FL_TREE },
+ { "right", SCOLS_FL_RIGHT },
+ { "strictwidth",SCOLS_FL_STRICTWIDTH },
+ { "noextremes", SCOLS_FL_NOEXTREMES },
+ { "hidden", SCOLS_FL_HIDDEN },
+ { "wrap", SCOLS_FL_WRAP },
+ { "wrapnl", SCOLS_FL_WRAP },
+ { "none", 0 }
+};
+
+static long name_to_flag(const char *name, size_t namesz)
+{
+ size_t i;
+
+ for (i = 0; i < ARRAY_SIZE(flags); i++) {
+ const char *cn = flags[i].name;
+
+ if (!strncasecmp(name, cn, namesz) && !*(cn + namesz))
+ return flags[i].mask;
+ }
+ warnx("unknown flag: %s", name);
+ return -1;
+}
+
+static int parse_column_flags(char *str)
+{
+ unsigned long num_flags = 0;
+
+ if (string_to_bitmask(str, &num_flags, name_to_flag))
+ err(EXIT_FAILURE, "failed to parse column flags");
+
+ return num_flags;
+}
+
+static struct libscols_column *parse_column(FILE *f)
+{
+ size_t len = 0;
+ char *line = NULL;
+ int nlines = 0;
+
+ struct libscols_column *cl = NULL;
+
+ while (getline(&line, &len, f) != -1) {
+
+ char *p = strrchr(line, '\n');
+ if (p)
+ *p = '\0';
+
+ switch (nlines) {
+ case 0: /* NAME */
+ cl = scols_new_column();
+ if (!cl)
+ goto fail;
+ if (scols_column_set_name(cl, line) != 0)
+ goto fail;
+ break;
+
+ case 1: /* WIDTH-HINT */
+ {
+ double whint = strtod_or_err(line, "failed to parse column whint");
+ if (scols_column_set_whint(cl, whint))
+ goto fail;
+ break;
+ }
+ case 2: /* FLAGS */
+ {
+ int num_flags = parse_column_flags(line);
+ if (scols_column_set_flags(cl, num_flags))
+ goto fail;
+ if (strcmp(line, "wrapnl") == 0) {
+ scols_column_set_wrapfunc(cl,
+ scols_wrapnl_chunksize,
+ scols_wrapnl_nextchunk,
+ NULL);
+ scols_column_set_safechars(cl, "\n");
+ }
+ break;
+ }
+ case 3: /* COLOR */
+ if (scols_column_set_color(cl, line))
+ goto fail;
+ break;
+ default:
+ break;
+ }
+
+ nlines++;
+ }
+
+ free(line);
+ return cl;
+fail:
+ free(line);
+ scols_unref_column(cl);
+ return NULL;
+}
+
+static int parse_column_data(FILE *f, struct libscols_table *tb, int col)
+{
+ size_t len = 0, nlines = 0;
+ int i;
+ char *str = NULL;
+
+ while ((i = getline(&str, &len, f)) != -1) {
+
+ struct libscols_line *ln;
+ char *p = strrchr(str, '\n');
+ if (p)
+ *p = '\0';
+
+ while ((p = strrchr(str, '\\')) && *(p + 1) == 'n') {
+ *p = '\n';
+ memmove(p + 1, p + 2, i - (p + 2 - str));
+ }
+
+ ln = scols_table_get_line(tb, nlines++);
+ if (!ln)
+ break;
+
+ if (*str && scols_line_set_data(ln, col, str) != 0)
+ err(EXIT_FAILURE, "failed to add output data");
+ }
+
+ free(str);
+ return 0;
+
+}
+
+static struct libscols_line *get_line_with_id(struct libscols_table *tb,
+ int col_id, const char *id)
+{
+ struct libscols_line *ln;
+ struct libscols_iter *itr = scols_new_iter(SCOLS_ITER_FORWARD);
+
+ while (scols_table_next_line(tb, itr, &ln) == 0) {
+ struct libscols_cell *ce = scols_line_get_cell(ln, col_id);
+ const char *data = ce ? scols_cell_get_data(ce) : NULL;
+
+ if (data && strcmp(data, id) == 0)
+ break;
+ }
+
+ scols_free_iter(itr);
+ return ln;
+}
+
+static void compose_tree(struct libscols_table *tb, int parent_col, int id_col)
+{
+ struct libscols_line *ln;
+ struct libscols_iter *itr = scols_new_iter(SCOLS_ITER_FORWARD);
+
+ while (scols_table_next_line(tb, itr, &ln) == 0) {
+ struct libscols_line *parent = NULL;
+ struct libscols_cell *ce = scols_line_get_cell(ln, parent_col);
+ const char *data = ce ? scols_cell_get_data(ce) : NULL;
+
+ if (data)
+ parent = get_line_with_id(tb, id_col, data);
+ if (parent)
+ scols_line_add_child(parent, ln);
+ }
+
+ scols_free_iter(itr);
+}
+
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+ FILE *out = stdout;
+ fprintf(out,
+ "\n %s [options] <column-data-file> ...\n\n", program_invocation_short_name);
+
+ fputs(" -m, --maxout fill all terminal width\n", out);
+ fputs(" -M, --minout minimize tailing padding\n", out);
+ fputs(" -c, --column <file> column definition\n", out);
+ fputs(" -n, --nlines <num> number of lines\n", out);
+ fputs(" -J, --json JSON output format\n", out);
+ fputs(" -r, --raw RAW output format\n", out);
+ fputs(" -E, --export use key=\"value\" output format\n", out);
+ fputs(" -C, --colsep <str> set columns separator\n", out);
+ fputs(" -w, --width <num> hardcode terminal width\n", out);
+ fputs(" -p, --tree-parent-column <n> parent column\n", out);
+ fputs(" -i, --tree-id-column <n> id column\n", out);
+ fputs(" -h, --help this help\n", out);
+ fputs("\n", out);
+
+ exit(EXIT_SUCCESS);
+}
+
+int main(int argc, char *argv[])
+{
+ struct libscols_table *tb;
+ int c, n, nlines = 0;
+ int parent_col = -1, id_col = -1;
+
+ static const struct option longopts[] = {
+ { "maxout", 0, NULL, 'm' },
+ { "minout", 0, NULL, 'M' },
+ { "column", 1, NULL, 'c' },
+ { "nlines", 1, NULL, 'n' },
+ { "width", 1, NULL, 'w' },
+ { "tree-parent-column", 1, NULL, 'p' },
+ { "tree-id-column", 1, NULL, 'i' },
+ { "json", 0, NULL, 'J' },
+ { "raw", 0, NULL, 'r' },
+ { "export", 0, NULL, 'E' },
+ { "colsep", 1, NULL, 'C' },
+ { "help", 0, NULL, 'h' },
+ { NULL, 0, NULL, 0 },
+ };
+
+ static const ul_excl_t excl[] = { /* rows and cols in ASCII order */
+ { 'E', 'J', 'r' },
+ { 'M', 'm' },
+ { 0 }
+ };
+ int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
+
+ setlocale(LC_ALL, ""); /* just to have enable UTF8 chars */
+ scols_init_debug(0);
+
+ tb = scols_new_table();
+ if (!tb)
+ err(EXIT_FAILURE, "failed to create output table");
+
+ while((c = getopt_long(argc, argv, "hCc:Ei:JMmn:p:rw:", longopts, NULL)) != -1) {
+
+ err_exclusive_options(c, longopts, excl, excl_st);
+
+ switch(c) {
+ case 'c': /* add column from file */
+ {
+ struct libscols_column *cl;
+ FILE *f = fopen(optarg, "r");
+
+ if (!f)
+ err(EXIT_FAILURE, "%s: open failed", optarg);
+ cl = parse_column(f);
+ if (cl && scols_table_add_column(tb, cl))
+ err(EXIT_FAILURE, "%s: failed to add column", optarg);
+ scols_unref_column(cl);
+ fclose(f);
+ break;
+ }
+ case 'p':
+ parent_col = strtou32_or_err(optarg, "failed to parse tree PARENT column");
+ break;
+ case 'i':
+ id_col = strtou32_or_err(optarg, "failed to parse tree ID column");
+ break;
+ case 'J':
+ scols_table_enable_json(tb, 1);
+ scols_table_set_name(tb, "testtable");
+ break;
+ case 'm':
+ scols_table_enable_maxout(tb, TRUE);
+ break;
+ case 'M':
+ scols_table_enable_minout(tb, TRUE);
+ break;
+ case 'r':
+ scols_table_enable_raw(tb, TRUE);
+ break;
+ case 'E':
+ scols_table_enable_export(tb, TRUE);
+ break;
+ case 'C':
+ scols_table_set_column_separator(tb, optarg);
+ break;
+ case 'n':
+ nlines = strtou32_or_err(optarg, "failed to parse number of lines");
+ break;
+ case 'w':
+ scols_table_set_termforce(tb, SCOLS_TERMFORCE_ALWAYS);
+ scols_table_set_termwidth(tb, strtou32_or_err(optarg, "failed to parse terminal width"));
+ break;
+ case 'h':
+ usage();
+ default:
+ errtryhelp(EXIT_FAILURE);
+ }
+ }
+
+ if (nlines <= 0)
+ errx(EXIT_FAILURE, "--nlines not set");
+
+ for (n = 0; n < nlines; n++) {
+ struct libscols_line *ln = scols_new_line();
+
+ if (!ln || scols_table_add_line(tb, ln))
+ err(EXIT_FAILURE, "failed to add a new line");
+
+ scols_unref_line(ln);
+ }
+
+ n = 0;
+
+ while (optind < argc) {
+ FILE *f = fopen(argv[optind], "r");
+
+ if (!f)
+ err(EXIT_FAILURE, "%s: open failed", argv[optind]);
+
+ parse_column_data(f, tb, n);
+ optind++;
+ n++;
+ }
+
+ if (scols_table_is_tree(tb) && parent_col >= 0 && id_col >= 0)
+ compose_tree(tb, parent_col, id_col);
+
+ scols_table_enable_colors(tb, isatty(STDOUT_FILENO));
+
+ scols_print_table(tb);
+ scols_unref_table(tb);
+ return EXIT_SUCCESS;
+}
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