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EnsurePlayerNameIsGood: Only evaluate strlen once

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Also has a slightly better chance of conflict avoidance for its absolute worst case scenario
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toaster 2024-03-18 19:17:34 +00:00
parent 9e549d5607
commit 1ef3063772
1 changed files with 6 additions and 7 deletions
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13
src/d_netcmd.c
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@ -602,11 +602,11 @@ static boolean AllowedPlayerNameChar(char ch)
boolean EnsurePlayerNameIsGood(char *name, INT32 playernum)
{
INT32 ix;
size_t ix, len = strlen(name);
if (strlen(name) == 0 || strlen(name) > MAXPLAYERNAME)
if (len == 0 || len > MAXPLAYERNAME)
return false; // Empty or too long.
if (name[0] == ' ' || name[strlen(name)-1] == ' ')
if (name[0] == ' ' || name[len-1] == ' ')
return false; // Starts or ends with a space.
if (isdigit(name[0]))
return false; // Starts with a digit.
@ -620,20 +620,19 @@ boolean EnsurePlayerNameIsGood(char *name, INT32 playernum)
// Also, anything over 0x80 is disallowed too, since compilers love to
// differ on whether they're printable characters or not.
for (ix = 0; name[ix] != '\0'; ix++)
for (ix = 0; ix < len; ix++)
if (!AllowedPlayerNameChar(name[ix]))
return false;
// Check if a player is currently using the name, case-insensitively.
for (ix = 0; ix < MAXPLAYERS; ix++)
{
if (ix != playernum && playeringame[ix]
if (ix != (size_t)playernum && playeringame[ix]
&& strcasecmp(name, player_names[ix]) == 0)
{
// We shouldn't kick people out just because
// they joined the game with the same name
// as someone else -- modify the name instead.
size_t len = strlen(name);
// Recursion!
// Slowly strip characters off the end of the
@ -647,7 +646,7 @@ boolean EnsurePlayerNameIsGood(char *name, INT32 playernum)
else if (len == 1) // Agh!
{
// Last ditch effort...
sprintf(name, "%d", M_RandomKey(10));
sprintf(name, "%d", 'A' + M_RandomKey(26));
if (!EnsurePlayerNameIsGood (name, playernum))
return false;
}