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| | #include "shgetc.h"
void __shlim(FILE *f, off_t lim)
{
f->shlim = lim;
f->shcnt = f->rend - f->rpos;
if (lim && f->shcnt > lim)
f->shend = f->rpos + lim;
else
f->shend = f->rend;
}
int __shgetc(FILE *f)
{
int c;
if (f->shlim && f->shcnt >= f->shlim || (c=__uflow(f)) < 0) {
f->shend = 0;
return EOF;
}
if (f->shlim && f->rend - f->rpos > f->shlim - f->shcnt - 1)
f->shend = f->rpos + (f->shlim - f->shcnt - 1);
else
f->shend = f->rend;
if (f->rend) f->shcnt += f->rend - f->rpos + 1;
if (f->rpos[-1] != c) f->rpos[-1] = c;
return c;
}
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