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[perl5.git] / generate_uudmap.c

diff --git a/generate_uudmap.c b/generate_uudmap.c
index 28cfd27..4c7d56c 100644 (file)
--- a/generate_uudmap.c
+++ b/generate_uudmap.c
@@ -1,17 +1,118 @@
+/* Originally this program just generated uudmap.h
+   However, when we later wanted to generate bitcount.h, it was easier to
+   refactor it and keep the same name, than either alternative - rename it,
+   or duplicate all of the Makefile logic for a second program.  */
+
 #include <stdio.h>
 #include <stdlib.h>
+/* If it turns out that we need to make this conditional on config.sh derived
+   values, it might be easier just to rip out the use of strerrer().  */
+#include <string.h>
+/* If a platform doesn't support errno.h, it's probably so strange that
+   "hello world" won't port easily to it.  */
+#include <errno.h>
+
+struct mg_data_raw_t {
+    unsigned char type;
+    const char *value;
+    const char *comment;
+};
+
+static struct mg_data_raw_t mg_data_raw[] = {
+#ifdef WIN32
+#  include "..\mg_raw.h"
+#else
+#  include "mg_raw.h"
+#endif
+    {0, 0, 0}
+};
+
+struct mg_data_t {
+    const char *value;
+    const char *comment;
+};
+
+static struct mg_data_t mg_data[256];
+
+static void
+format_mg_data(FILE *out, const void *thing, size_t count) {
+  const struct mg_data_t *p = (const struct mg_data_t *)thing;
+
+  while (1) {
+      if (p->value) {
+         fprintf(out, "    %s\n    %s", p->comment, p->value);
+      } else {
+         fputs("    0", out);
+      }
+      ++p;
+      if (!--count)
+         break;
+      fputs(",\n", out);
+  }
+  fputc('\n', out);
+}
+
+static void
+format_char_block(FILE *out, const void *thing, size_t count) {
+  const char *block = (const char *)thing;
+
+  fputs("    ", out);
+  while (count--) {
+    fprintf(out, "%d", *block);
+    block++;
+    if (count) {
+      fputs(", ", out);
+      if (!(count & 15)) {
+       fputs("\n    ", out);
+      }
+    }
+  }
+  fputc('\n', out);
+}
+
+static void
+output_to_file(const char *progname, const char *filename,
+              void (format_function)(FILE *out, const void *thing, size_t count),
+              const void *thing, size_t count) {
+  FILE *const out = fopen(filename, "w");
+
+  if (!out) {
+    fprintf(stderr, "%s: Could not open '%s': %s\n", progname, filename,
+           strerror(errno));
+    exit(1);
+  }
+
+  fputs("{\n", out);
+  format_function(out, thing, count);
+  fputs("}\n", out);
+
+  if (fclose(out)) {
+    fprintf(stderr, "%s: Could not close '%s': %s\n", progname, filename,
+           strerror(errno));
+    exit(1);
+  }
+}
+
 
 static const char PL_uuemap[]
 = "`!\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
 
 typedef unsigned char U8;
 
-/* This will ensure it is all zeros.  */
+/* This will ensure it is initialized to all zeros.  */
 static char PL_uudmap[256];
+static char PL_bitcount[256];
 
-int main() {
+int main(int argc, char **argv) {
   size_t i;
-  char *p;
+  int bits;
+  struct mg_data_raw_t *p = mg_data_raw;
+
+  if (argc < 4 || argv[1][0] == '\0' || argv[2][0] == '\0'
+      || argv[3][0] == '\0') {
+    fprintf(stderr, "Usage: %s uudemap.h bitcount.h mg_data.h\n", argv[0]);
+    return 1;
+  }
 
   for (i = 0; i < sizeof(PL_uuemap) - 1; ++i)
     PL_uudmap[(U8)PL_uuemap[i]] = (char)i;
@@ -21,23 +122,31 @@ int main() {
    */
   PL_uudmap[(U8)' '] = 0;
 
-  i = sizeof(PL_uudmap);
-  p = PL_uudmap;
-
-  fputs("{\n    ", stdout);
-  while (i--) {
-    printf("%d", *p);
-    p++;
-    if (i) {
-      fputs(", ", stdout);
-      if (!(i & 15)) {
-       fputs("\n    ", stdout);
-      }
-    }
+  output_to_file(argv[0], argv[1], &format_char_block,
+                (const void *)PL_uudmap, sizeof(PL_uudmap));
+
+  for (bits = 1; bits < 256; bits++) {
+    if (bits & 1)      PL_bitcount[bits]++;
+    if (bits & 2)      PL_bitcount[bits]++;
+    if (bits & 4)      PL_bitcount[bits]++;
+    if (bits & 8)      PL_bitcount[bits]++;
+    if (bits & 16)     PL_bitcount[bits]++;
+    if (bits & 32)     PL_bitcount[bits]++;
+    if (bits & 64)     PL_bitcount[bits]++;
+    if (bits & 128)    PL_bitcount[bits]++;
   }
-  puts("\n}");
+
+  output_to_file(argv[0], argv[2], &format_char_block,
+                (const void *)PL_bitcount, sizeof(PL_bitcount));
+
+  while (p->value) {
+      mg_data[p->type].value = p->value;
+      mg_data[p->type].comment = p->comment;
+      ++p;
+  }
+      
+  output_to_file(argv[0], argv[3], &format_mg_data,
+                (const void *)mg_data, sizeof(mg_data)/sizeof(mg_data[0]));
 
   return 0;
 }
-
-