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(svn r1925) Fixed an infinite loop if the town generator runs out of town names. The number of generated towns is then limited by the number of available names.

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pasky 2005-03-05 13:49:43 +00:00
parent 6f184a0471
commit b5a96ff9c1
1 changed files with 33 additions and 11 deletions
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44
town_cmd.c
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@ -864,21 +864,28 @@ static void UpdateTownRadius(Town *t)
}
}
static void CreateTownName(Town *t1)
static bool CreateTownName(uint32 *townnameparts)
{
Town *t2;
char buf1[64];
char buf2[64];
uint32 r;
/* Do not set too low tries, since when we run out of names, we loop
* for #tries only one time anyway - then we stop generating more
* towns. Do not show it too high neither, since looping through all
* the other towns may take considerable amount of time (10000 is
* too much). */
int tries = 1000;
uint16 townnametype = SPECSTR_TOWNNAME_START + _opt.town_name;
t1->townnametype = SPECSTR_TOWNNAME_START + _opt.town_name;
assert(townnameparts);
for(;;) {
restart:
r = Random();
SetDParam(0, r);
GetString(buf1, t1->townnametype);
GetString(buf1, townnametype);
// Check size and width
if (strlen(buf1) >= 31 || GetStringWidth(buf1) > 130)
@ -886,15 +893,19 @@ restart:
FOR_ALL_TOWNS(t2) {
if (t2->xy != 0) {
// We can't just compare the numbers since
// several numbers may map to a single name.
SetDParam(0, t2->townnameparts);
GetString(buf2, t2->townnametype);
if (strcmp(buf1, buf2) == 0)
if (strcmp(buf1, buf2) == 0) {
if (tries-- < 0)
return false;
goto restart;
}
}
}
t1->townnameparts = r;
return;
*townnameparts = r;
return true;
}
}
@ -904,7 +915,7 @@ void UpdateTownMaxPass(Town *t)
t->max_mail = t->population >> 4;
}
static void DoCreateTown(Town *t, TileIndex tile)
static void DoCreateTown(Town *t, TileIndex tile, uint32 townnameparts)
{
int x, i;
@ -946,7 +957,8 @@ static void DoCreateTown(Town *t, TileIndex tile)
t->exclusive_counter = 0;
t->statues = 0;
CreateTownName(t);
t->townnametype = SPECSTR_TOWNNAME_START + _opt.town_name;
t->townnameparts = townnameparts;
UpdateTownVirtCoord(t);
_town_sort_dirty = true;
@ -997,6 +1009,7 @@ int32 CmdBuildTown(int x, int y, uint32 flags, uint32 p1, uint32 p2)
uint tile = TILE_FROM_XY(x,y);
TileInfo ti;
Town *t;
uint32 townnameparts;
SET_EXPENSES_TYPE(EXPENSES_OTHER);
@ -1013,6 +1026,10 @@ int32 CmdBuildTown(int x, int y, uint32 flags, uint32 p1, uint32 p2)
if (IsCloseToTown(tile, 20))
return_cmd_error(STR_0238_TOO_CLOSE_TO_ANOTHER_TOWN);
// Get a unique name for the town.
if (!CreateTownName(&townnameparts))
return_cmd_error(STR_023A_TOO_MANY_TOWNS);
// Allocate town struct
t = AllocateTown();
if (t == NULL)
@ -1021,7 +1038,7 @@ int32 CmdBuildTown(int x, int y, uint32 flags, uint32 p1, uint32 p2)
// Create the town
if (flags & DC_EXEC) {
_generating_world = true;
DoCreateTown(t, tile);
DoCreateTown(t, tile, townnameparts);
_generating_world = false;
}
return 0;
@ -1032,6 +1049,7 @@ Town *CreateRandomTown(uint attempts)
uint tile;
TileInfo ti;
Town *t;
uint32 townnameparts;
do {
// Generate a tile index not too close from the edge
@ -1048,12 +1066,16 @@ Town *CreateRandomTown(uint attempts)
if (IsCloseToTown(tile, 20))
continue;
// Get a unique name for the town.
if (!CreateTownName(&townnameparts))
break;
// Allocate a town struct
t = AllocateTown();
if (t == NULL)
break;
DoCreateTown(t, tile);
DoCreateTown(t, tile, townnameparts);
return t;
} while (--attempts);
return NULL;