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vchan: specify data param of libvchan_write as const

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It isn't (and shouldn't) modified by the function so mark it in declaration.
This will also help catching some errors.
This commit is contained in:
Marek Marczykowski 2012-11-03 01:41:59 +01:00
parent 595696b6f6
commit 6b23655fb7
2 changed files with 2 additions and 2 deletions
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2
vchan/io.c
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@ -129,7 +129,7 @@ int libvchan_wait(struct libvchan *ctrl)
may write less data than requested;
returns the amount of data processed, -1 on error or peer close
*/
int libvchan_write(struct libvchan *ctrl, char *data, int size)
int libvchan_write(struct libvchan *ctrl, const char *data, int size)
{
int avail, avail_contig;
int real_idx;

2
vchan/libvchan.h
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@ -78,7 +78,7 @@ struct libvchan *libvchan_server_init(int devno);
struct libvchan *libvchan_client_init(int domain, int devno);
int libvchan_server_handle_connected(struct libvchan *ctrl);
int libvchan_write(struct libvchan *ctrl, char *data, int size);
int libvchan_write(struct libvchan *ctrl, const char *data, int size);
int libvchan_read(struct libvchan *ctrl, char *data, int size);
int libvchan_wait(struct libvchan *ctrl);
int libvchan_close(struct libvchan *ctrl);