e148542870
The comment describing the packet writing interface was
originally written above packet_write, but migrated to be
above safe_write in f3a3214, probably because it is meant to
generally describe the packet writing interface and not a
single function. Let's move it into the header file, where
users of the interface are more likely to see it.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
33 lines
1.2 KiB
C
33 lines
1.2 KiB
C
#ifndef PKTLINE_H
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#define PKTLINE_H
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#include "git-compat-util.h"
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#include "strbuf.h"
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/*
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* Write a packetized stream, where each line is preceded by
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* its length (including the header) as a 4-byte hex number.
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* A length of 'zero' means end of stream (and a length of 1-3
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* would be an error).
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*
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* This is all pretty stupid, but we use this packetized line
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* format to make a streaming format possible without ever
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* over-running the read buffers. That way we'll never read
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* into what might be the pack data (which should go to another
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* process entirely).
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*
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* The writing side could use stdio, but since the reading
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* side can't, we stay with pure read/write interfaces.
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*/
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void packet_flush(int fd);
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void packet_write(int fd, const char *fmt, ...) __attribute__((format (printf, 2, 3)));
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void packet_buf_flush(struct strbuf *buf);
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void packet_buf_write(struct strbuf *buf, const char *fmt, ...) __attribute__((format (printf, 2, 3)));
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int packet_read_line(int fd, char *buffer, unsigned size);
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int packet_read(int fd, char *buffer, unsigned size);
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int packet_get_line(struct strbuf *out, char **src_buf, size_t *src_len);
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ssize_t safe_write(int, const void *, ssize_t);
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#endif
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