1960e73611
We have plenty of code in our codebase that outputs tables to the console, and all is homegrown and awful. Let's replace it with a generic implementation that can do automatically what the old implementations did manually. Features: 1. Ellipsation (for fields overly long) and alignment (for fields overly short) 2. Sorting of rows 3. automatically copies formatting from the same cell in the row above 4. Heavy use of varargs to make putting together tables easy 5. can expand and compress tables, with weights 6. Has a minimal understanding of unicode wide characters in order to match unicode strings to character cell terminals. 7. Columns can be reordered and individually turned off. 8. pretty printing for various data types And more.
140 lines
4.7 KiB
C
140 lines
4.7 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include "alloc-util.h"
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#include "format-table.h"
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#include "string-util.h"
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#include "time-util.h"
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int main(int argc, char *argv[]) {
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_cleanup_(table_unrefp) Table *t = NULL;
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_cleanup_free_ char *formatted = NULL;
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assert_se(setenv("COLUMNS", "40", 1) >= 0);
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assert_se(t = table_new("ONE", "TWO", "THREE"));
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assert_se(table_set_align_percent(t, TABLE_HEADER_CELL(2), 100) >= 0);
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assert_se(table_add_many(t,
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TABLE_STRING, "xxx",
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TABLE_STRING, "yyy",
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TABLE_BOOLEAN, true) >= 0);
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assert_se(table_add_many(t,
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TABLE_STRING, "a long field",
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TABLE_STRING, "yyy",
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TABLE_BOOLEAN, false) >= 0);
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assert_se(table_format(t, &formatted) >= 0);
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printf("%s\n", formatted);
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assert_se(streq(formatted,
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"ONE TWO THREE\n"
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"xxx yyy yes\n"
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"a long field yyy no\n"));
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formatted = mfree(formatted);
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table_set_width(t, 40);
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assert_se(table_format(t, &formatted) >= 0);
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printf("%s\n", formatted);
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assert_se(streq(formatted,
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"ONE TWO THREE\n"
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"xxx yyy yes\n"
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"a long field yyy no\n"));
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formatted = mfree(formatted);
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table_set_width(t, 12);
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assert_se(table_format(t, &formatted) >= 0);
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printf("%s\n", formatted);
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assert_se(streq(formatted,
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"ONE TWO THR…\n"
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"xxx yyy yes\n"
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"a … yyy no\n"));
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formatted = mfree(formatted);
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table_set_width(t, 5);
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assert_se(table_format(t, &formatted) >= 0);
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printf("%s\n", formatted);
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assert_se(streq(formatted,
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"… … …\n"
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"… … …\n"
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"… … …\n"));
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formatted = mfree(formatted);
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table_set_width(t, 3);
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assert_se(table_format(t, &formatted) >= 0);
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printf("%s\n", formatted);
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assert_se(streq(formatted,
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"… … …\n"
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"… … …\n"
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"… … …\n"));
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formatted = mfree(formatted);
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table_set_width(t, (size_t) -1);
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assert_se(table_set_sort(t, (size_t) 0, (size_t) 2, (size_t) -1) >= 0);
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assert_se(table_format(t, &formatted) >= 0);
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printf("%s\n", formatted);
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assert_se(streq(formatted,
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"ONE TWO THREE\n"
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"a long field yyy no\n"
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"xxx yyy yes\n"));
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formatted = mfree(formatted);
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table_set_header(t, false);
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assert_se(table_add_many(t,
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TABLE_STRING, "fäää",
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TABLE_STRING, "uuu",
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TABLE_BOOLEAN, true) >= 0);
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assert_se(table_add_many(t,
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TABLE_STRING, "fäää",
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TABLE_STRING, "zzz",
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TABLE_BOOLEAN, false) >= 0);
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assert_se(table_add_many(t,
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TABLE_EMPTY,
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TABLE_SIZE, (uint64_t) 4711,
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TABLE_TIMESPAN, (usec_t) 5*USEC_PER_MINUTE) >= 0);
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assert_se(table_format(t, &formatted) >= 0);
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printf("%s\n", formatted);
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assert_se(streq(formatted,
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"a long field yyy no\n"
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"fäää zzz no\n"
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"fäää uuu yes\n"
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"xxx yyy yes\n"
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" 4.6K 5min\n"));
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formatted = mfree(formatted);
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assert_se(table_set_display(t, (size_t) 2, (size_t) 0, (size_t) 2, (size_t) 0, (size_t) 0, (size_t) -1) >= 0);
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assert_se(table_format(t, &formatted) >= 0);
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printf("%s\n", formatted);
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assert_se(streq(formatted,
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" no a long f… no a long f… a long fi…\n"
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" no fäää no fäää fäää \n"
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" yes fäää yes fäää fäää \n"
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" yes xxx yes xxx xxx \n"
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"5min 5min \n"));
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return 0;
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}
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