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81 lines
1.5 KiB
81 lines
1.5 KiB
2 months ago
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/*
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* UCW Library -- Fast Buffered I/O: Strings on stack
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*
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* (c) 2008 Michal Vaner <vorner@ucw.cz>
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*
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* Code taken from ff-string.c by:
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*
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* (c) 1997--2006 Martin Mares <mj@ucw.cz>
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* (c) 2006 Pavel Charvat <pchar@ucw.cz>
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*
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* This software may be freely distributed and used according to the terms
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* of the GNU Lesser General Public License.
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*/
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#include <ucw/lib.h>
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#include <ucw/fastbuf.h>
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void
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bgets_stk_init(struct bgets_stk_struct *s)
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{
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s->src_len = bdirect_read_prepare(s->f, &s->src);
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if (!s->src_len)
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{
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s->cur_buf = NULL;
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s->cur_len = 0;
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}
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else
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{
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s->old_buf = NULL;
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s->cur_len = 256;
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}
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}
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void
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bgets_stk_step(struct bgets_stk_struct *s)
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{
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byte *buf = s->cur_buf;
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uint buf_len = s->cur_len;
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if (s->old_buf)
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{
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memcpy( s->cur_buf, s->old_buf, s->old_len);
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buf += s->old_len;
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buf_len -= s->old_len;
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}
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do
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{
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uint cnt = MIN(s->src_len, buf_len);
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for (uint i = cnt; i--;)
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{
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byte v = *s->src++;
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if (v == '\n')
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{
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bdirect_read_commit(s->f, s->src);
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goto exit;
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}
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*buf++ = v;
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}
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if (cnt == s->src_len)
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{
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bdirect_read_commit(s->f, s->src);
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s->src_len = bdirect_read_prepare(s->f, &s->src);
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}
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else
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s->src_len -= cnt;
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if (cnt == buf_len)
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{
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s->old_len = s->cur_len;
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s->old_buf = s->cur_buf;
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s->cur_len *= 2;
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return;
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}
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else
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buf_len -= cnt;
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}
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while (s->src_len);
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exit:
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*buf = 0;
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s->cur_len = 0;
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}
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