Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
branch: blead
Fetching contributors…

Cannot retrieve contributors at this time

91 lines (72 sloc) 2.444 kB
/* 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>
void output_block_to_file(const char *progname, const char *filename,
const char *block, 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);
while (count--) {
fprintf(out, "%d", *block);
block++;
if (count) {
fputs(", ", out);
if (!(count & 15)) {
fputs("\n ", out);
}
}
}
fputs("\n}\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. */
static char PL_uudmap[256];
static char PL_bitcount[256];
int main(int argc, char **argv) {
size_t i;
int bits;
if (argc < 3 || argv[1][0] == '\0' || argv[2][0] == '\0') {
fprintf(stderr, "Usage: %s uudemap.h bitcount.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_block_to_file(argv[0], argv[1], 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_block_to_file(argv[0], argv[2], PL_bitcount, sizeof(PL_bitcount));
return 0;
}
Jump to Line
Something went wrong with that request. Please try again.