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fix possible buffer overflows and undefined behaviour

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This commit is contained in:
Jfreegman
2014-07-25 17:55:21 -04:00
parent fb5a9bc043
commit f630a3e604
6 changed files with 11 additions and 12 deletions
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7
src/input.c
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@ -145,16 +145,13 @@ static void input_mv_left(ToxWindow *self, int x, int mx_x)
if (ctx->pos <= 0)
return;
int cur_len = wcwidth(ctx->line[ctx->pos - 1]);
int cur_len = ctx->pos > 0 ? wcwidth(ctx->line[ctx->pos - 1]) : 0;
int s_len = ctx->start > 0 ? wcwidth(ctx->line[ctx->start - 1]) : 0;
--ctx->pos;
int s_len = wcwidth(ctx->line[ctx->start - 1]);
if (ctx->start && (x >= mx_x - cur_len))
ctx->start = MAX(0, ctx->start - 1 + (s_len - cur_len));
else if (ctx->start && (ctx->pos == ctx->len))
ctx->start = MAX(0, ctx->start - cur_len);
else if (ctx->start)
ctx->start = MAX(0, ctx->start - cur_len);
}