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Diffstat (limited to 'libsmartcols/samples/fromfile.c')
| -rw-r--r-- | libsmartcols/samples/fromfile.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/libsmartcols/samples/fromfile.c b/libsmartcols/samples/fromfile.c new file mode 100644 index 000000000..361de01c7 --- /dev/null +++ b/libsmartcols/samples/fromfile.c @@ -0,0 +1,225 @@ +/* + * 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 "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_WRAPNL }, + { "none", 0 } +}; + +static long name_to_flag(const char *name, long unsigned int 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 flags = 0; + + if (string_to_bitmask(str, &flags, name_to_flag)) + err(EXIT_FAILURE, "failed to parse column flags"); + + return 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 */ + { + struct libscols_cell *hr; + + cl = scols_new_column(); + if (!cl) + goto fail; + hr = scols_column_get_header(cl); + if (!hr || scols_cell_set_data(hr, line)) + 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 flags = parse_column_flags(line); + if (scols_column_set_flags(cl, flags)) + goto fail; + break; + } + case 3: /* COLOR */ + if (scols_column_set_color(cl, line)) + goto fail; + break; + default: + break; + } + + nlines++; + } + + return cl; +fail: + scols_unref_column(cl); + return NULL; +} + +static int parse_column_data(FILE *f, struct libscols_table *tb, int column) +{ + 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; + scols_line_set_data(ln, column, str); + } + + return 0; + +} + +int main(int argc, char *argv[]) +{ + struct libscols_table *tb; + int c, n, nlines = 0; + + static const struct option longopts[] = { + { "maxout", 0, 0, 'm' }, + { "column", 1, 0, 'c' }, + { "nlines", 1, 0, 'n' }, + { NULL, 0, 0, 0 }, + }; + + 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, "c:mn:", longopts, NULL)) != -1) { + 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 'm': + scols_table_enable_maxout(tb, TRUE); + break; + case 'n': + nlines = strtou32_or_err(optarg, "failed to parse number of lines"); + break; + default: + err(EXIT_FAILURE, "%s [-r|--random]\n", program_invocation_short_name); + } + } + + 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"); + } + + 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++; + } + + scols_table_enable_colors(tb, isatty(STDOUT_FILENO)); + + scols_print_table(tb); + scols_unref_table(tb); + return EXIT_SUCCESS; +} |