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Add missing casts to unsigned char inside ctype functions.

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These are necessary because the argument to a ctype function cannot be
a negative value unless it's EOF. Thanks to Cygwin gcc for pointing
out the mistake, and to Patrick Shaughnessy for this patch.
This commit is contained in:
Simon Tatham
2016-02-01 19:06:36 +00:00
parent 1d9d6cbf12
commit 59705cccd1
1 changed files with 6 additions and 6 deletions
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12
palisade.c
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@ -697,17 +697,17 @@ static char *validate_desc(const game_params *params, const char *desc)
int w = params->w, h = params->h, wh = w*h, squares = 0;
for (/* nop */; *desc; ++desc) {
if (islower(*desc)) {
if (islower((unsigned char)*desc)) {
squares += *desc - 'a' + 1;
} else if (isdigit(*desc)) {
} else if (isdigit((unsigned char)*desc)) {
if (*desc > '4') {
static char buf[] = "Invalid (too large) number: '5'";
assert (isdigit(buf[lenof(buf) - 3]));
assert (isdigit((unsigned char)buf[lenof(buf) - 3]));
buf[lenof(buf) - 3] = *desc; /* ... or 6, 7, 8, 9 :-) */
return buf;
}
++squares;
} else if (isprint(*desc)) {
} else if (isprint((unsigned char)*desc)) {
static char buf[] = "Invalid character in data: '?'";
buf[lenof(buf) - 3] = *desc;
return buf;
@ -732,8 +732,8 @@ static game_state *new_game(midend *me, const game_params *params,
setmem(state->shared->clues, EMPTY, wh);
for (i = 0; *desc; ++desc) {
if (isdigit(*desc)) state->shared->clues[i++] = *desc - '0';
else if (isalpha(*desc)) i += *desc - 'a' + 1;
if (isdigit((unsigned char)*desc)) state->shared->clues[i++] = *desc - '0';
else if (isalpha((unsigned char)*desc)) i += *desc - 'a' + 1;
}
snewa(state->borders, wh);