File: generate_uudmap.c

package info (click to toggle)
perl 5.24.1-3+deb9u5
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 103,716 kB
  • sloc: perl: 559,611; ansic: 293,886; sh: 67,316; pascal: 7,632; cpp: 3,895; makefile: 2,436; xml: 2,410; yacc: 989; sed: 6; lisp: 1
file content (152 lines) | stat: -rw-r--r-- 3,834 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/* 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 initialized to all zeros.  */
static char PL_uudmap[256];
static char PL_bitcount[256];

int main(int argc, char **argv) {
  size_t i;
  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;
  /*
   * Because ' ' and '`' map to the same value,
   * we need to decode them both the same.
   */
  PL_uudmap[(U8)' '] = 0;

  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]++;
  }

  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;
}