36 lines
668 B
C
36 lines
668 B
C
#include <stdio.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "common.h"
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ssize_t buf_fill(struct buf *buf, int fd) {
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if (buf->start + buf->length == BUF_LEN) {
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assert(buf->start > 0);
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memmove(buf->buf, buf_at(buf, 0), buf->length);
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buf->start = 0;
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}
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size_t space = BUF_LEN - buf->length - buf->start;
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ssize_t in = read(fd, buf_at(buf, buf->length), space);
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if (in < 0) {
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return in;
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}
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buf->length += in;
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return in;
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}
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void buf_consume(struct buf *buf, size_t length) {
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assert(buf->length >= length);
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buf->length -= length;
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if (buf->length) {
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buf->start += length;
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} else {
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buf->start = 0;
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}
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}
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