Initial import

tool/decode/mkwides.c

@@ -0,0 +1,104 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
+│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ This program is free software; you can redistribute it and/or modify         │
+│ it under the terms of the GNU General Public License as published by         │
+│ the Free Software Foundation; version 2 of the License.                      │
+│                                                                              │
+│ This program is distributed in the hope that it will be useful, but          │
+│ WITHOUT ANY WARRANTY; without even the implied warranty of                   │
+│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU             │
+│ General Public License for more details.                                     │
+│                                                                              │
+│ You should have received a copy of the GNU General Public License            │
+│ along with this program; if not, write to the Free Software                  │
+│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA                │
+│ 02110-1301 USA                                                               │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/bits/safemacros.h"
+#include "libc/fmt/fmt.h"
+#include "libc/log/check.h"
+#include "libc/mem/mem.h"
+#include "libc/runtime/runtime.h"
+#include "libc/stdio/stdio.h"
+#include "libc/str/str.h"
+#include "libc/sysv/consts/ex.h"
+#include "libc/sysv/consts/exit.h"
+#include "third_party/getopt/getopt.h"
+#include "tool/decode/lib/bitabuilder.h"
+
+static FILE *fin, *fout;
+static char width, *line;
+static size_t linecap, i, x, y;
+static struct BitaBuilder *bitset;
+static char *g_inpath, *g_outpath;
+
+noreturn void ShowUsage(FILE *f, int rc) {
+  fprintf(f, "Usage: %s [-o OUTPUT] [INPUT]\n", "Usage",
+          program_invocation_name);
+  exit(rc);
+}
+
+void GetOpts(int argc, char *argv[]) {
+  int opt;
+  g_inpath = "/dev/stdin";
+  g_outpath = "/dev/stdout";
+  while ((opt = getopt(argc, argv, "?ho:")) != -1) {
+    switch (opt) {
+      case 'o':
+        g_outpath = optarg;
+        break;
+      case 'h':
+      case '?':
+        ShowUsage(stdout, EXIT_SUCCESS);
+      default:
+        ShowUsage(stderr, EX_USAGE);
+    }
+  }
+  if (argc - optind) {
+    g_inpath = argv[optind];
+  }
+}
+
+/**
+ * Converts official UNICODE ‘monospace widths’ (yup) to a bitset.
+ *
+ *      (╯°□°)╯︵ ̲┻̲━̲┻
+ *      要依法治国是赞美那些谁是公义的和惩罚恶人。 - 韩非
+ *
+ * 172kB TXT → 32kB bits → 525 bytes lz4
+ *
+ * @note this tool may print binary to stdout
+ * @see libc/kompressor/lz4decode.c
+ * @see tool/viz/bing.c
+ * @see tool/viz/fold.c
+ * @see unicode.org/reports/tr11/#Definitions
+ */
+int main(int argc, char *argv[]) {
+  GetOpts(argc, argv);
+  bitset = bitabuilder_new();
+  CHECK_NOTNULL(fin = fopen(g_inpath, "r"));
+  while ((getline(&line, &linecap, fin)) != -1) {
+    x = 0;
+    y = 0;
+    if (sscanf(line, "%x..%x;%c", &x, &y, &width) != 3) {
+      if (sscanf(line, "%x;%c", &x, &width) == 2) {
+        y = x;
+      } else {
+        continue;
+      }
+    }
+    CHECK_LE(x, y);
+    if (width == 'F' /* full-width */ || width == 'W' /* wide */) {
+      for (i = x; i <= y; ++i) {
+        CHECK(bitabuilder_setbit(bitset, i));
+      }
+    }
+  }
+  CHECK_NOTNULL(fout = fopen(g_outpath, "wb"));
+  CHECK(bitabuilder_fwrite(bitset, fout));
+  bitabuilder_free(&bitset);
+  return fclose(fin) | fclose(fout);
+}