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All cosmetic.

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1) Rename RANDOM_MAX to RANDOM_MAX_PLUS1 to not confuse with random()'s max
2) Use calloc() instead of zeroing fields explicitly
3) "too many lines" -> "too many delimiters" for err()
This commit is contained in:
Andrey A. Chernov 2008-08-10 11:31:56 +00:00
parent d2155f2f19
commit 2a3fabc4d3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=181527
3 changed files with 9 additions and 12 deletions
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6
games/random/random.c
View File

@ -162,7 +162,7 @@ main(int argc, char *argv[])
/* Compute a random exit status between 0 and denom - 1. */
if (random_exit)
return (int)(denom * random() / RANDOM_MAX);
return (int)(denom * random() / RANDOM_MAX_PLUS1);
/*
* Select whether to print the first line. (Prime the pump.)
@ -170,7 +170,7 @@ main(int argc, char *argv[])
* 0 (which has a 1 / denom chance of being true), we select the
* line.
*/
selected = (int)(denom * random() / RANDOM_MAX) == 0;
selected = (int)(denom * random() / RANDOM_MAX_PLUS1) == 0;
while ((ch = getchar()) != EOF) {
if (selected)
(void)putchar(ch);
@ -180,7 +180,7 @@ main(int argc, char *argv[])
err(2, "stdout");
/* Now see if the next line is to be printed. */
selected = (int)(denom * random() / RANDOM_MAX) == 0;
selected = (int)(denom * random() / RANDOM_MAX_PLUS1) == 0;
}
}
if (ferror(stdin))

13
games/random/randomize_fd.c
View File

@ -48,13 +48,10 @@ rand_node_allocate(void)
{
struct rand_node *n;
n = (struct rand_node *)malloc(sizeof(struct rand_node));
n = (struct rand_node *)calloc(1, sizeof(struct rand_node));
if (n == NULL)
err(1, "malloc");
err(1, "calloc");
n->len = 0;
n->cp = NULL;
n->next = NULL;
return(n);
}
@ -175,9 +172,9 @@ randomize_fd(int fd, int type, int unique, double denom)
(type == RANDOM_TYPE_WORDS && isspace(buf[i])) ||
(eof && i == buflen - 1)) {
make_token:
if (numnode == RANDOM_MAX) {
if (numnode == RANDOM_MAX_PLUS1) {
errno = EFBIG;
err(1, "too many lines");
err(1, "too many delimiters");
}
numnode++;
n = rand_node_allocate();
@ -215,7 +212,7 @@ randomize_fd(int fd, int type, int unique, double denom)
if (n->cp == NULL)
break;
if ((int)(denom * random() / RANDOM_MAX) == 0) {
if ((int)(denom * random() / RANDOM_MAX_PLUS1) == 0) {
ret = printf("%.*s", (int)n->len - 1, n->cp);
if (ret < 0)
err(1, "printf");

2
games/random/randomize_fd.h
View File

@ -33,7 +33,7 @@
* The random() function is defined to return values between 0 and
* 2^31 - 1 inclusive in random(3).
*/
#define RANDOM_MAX 0x80000000UL
#define RANDOM_MAX_PLUS1 0x80000000UL
#define RANDOM_TYPE_UNSET 0
#define RANDOM_TYPE_LINES 1