X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/2b1d1392b607905ceba6df972064ea1ea6777ba8..ea80267dedd60432aa28c94fa4ce7afe4792ec92:/generate_uudmap.c

diff --git a/generate_uudmap.c b/generate_uudmap.c
index 31aba75..b6307c0 100644
--- a/generate_uudmap.c
+++ b/generate_uudmap.c
@@ -1,3 +1,8 @@
+/* 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
@@ -7,6 +12,88 @@
    "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[\\]^_";
 
@@ -14,20 +101,16 @@ typedef unsigned char U8;
 
 /* This will ensure it is all zeros.  */
 static char PL_uudmap[256];
+static char PL_bitcount[256];
 
 int main(int argc, char **argv) {
   size_t i;
-  char *p;
-  FILE *uudmap_out;
-
-  if (argc < 2 || argv[1][0] == '\0') {
-    fprintf(stderr, "Usage: %s uudemap.h\n", argv[0]);
-    return 1;
-  }
+  int bits;
+  struct mg_data_raw_t *p = mg_data_raw;
 
-  if (!(uudmap_out = fopen(argv[1], "w"))) {
-    fprintf(stderr, "%s: Could not open '%s': %s\n", argv[0], argv[1],
-	    strerror(errno));
+  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;
   }
 
@@ -39,29 +122,31 @@ int main(int argc, char **argv) {
    */
   PL_uudmap[(U8)' '] = 0;
 
-  i = sizeof(PL_uudmap);
-  p = PL_uudmap;
-
-  fputs("{\n    ", uudmap_out);
-  while (i--) {
-    fprintf(uudmap_out, "%d", *p);
-    p++;
-    if (i) {
-      fputs(", ", uudmap_out);
-      if (!(i & 15)) {
-	fputs("\n    ", uudmap_out);
-      }
-    }
+  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]++;
   }
-  fputs("\n}\n", uudmap_out);
 
-  if (fclose(uudmap_out)) {
-    fprintf(stderr, "%s: Could not close '%s': %s\n", argv[0], argv[1],
-	    strerror(errno));
-    return 1;
+  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;
 }
-
-