[PATCH 5/5] scripts: imx-usb-loader: split off topic-code into functions

[Sascha Hauer]

On Sun, Jul 17, 2016 at 10:31:47PM +0200, Alexander Kurz wrote:
> 
> 
> On Sun, 17 Jul 2016, Alexander Shiyan wrote:
> 
> > >Воскресенье, 17 июля 2016, 18:53 +03:00 от Alexander Kurz <akurz at blala.de>:
> > >
> > >Improve code understandability: extract the "jump application" Serial
> > >Download Protocol access method and file-to-buffer reader functionality
> > >out of do_irom_download().
> > >
> > >Signed-off-by: Alexander Kurz < akurz at blala.de >
> > >---
> > > scripts/imx/imx-usb-loader.c | 159 +++++++++++++++++++++++++------------------
> > > 1 file changed, 92 insertions(+), 67 deletions(-)
> > >
> > >diff --git a/scripts/imx/imx-usb-loader.c b/scripts/imx/imx-usb-loader.c
> > ...
> > >+FILE *xfile;
> > >+unsigned fsize;
> > >+int cnt;
> > >+unsigned char *buf;
> > >+xfile = fopen(name, "rb");
> > >+if (!xfile) {
> > >+printf("error, can not open input file: %s\n", name);
> > >+return -5;
> > ...
> > >+fsize = get_file_size(xfile);
> > >+if (fsize < 0x20) {
> > >+printf("error, file: %s is too small\n", name);
> > >+fclose(xfile);
> > >+return -2;
> > -2 ? Maybe -EINVAL or so will be more appropriate here?
> > 
> > ---
> Yes, right,
> that's just the behviour from the existing implementation (don't touch too 
> many topics with one patch at one time)
> There are much more magic-number returns in imx-usb-loader.c, I propose to 
> do a specific cleanup on this.

I agree with you both: Error codes should be used and also this is topic
for a separate cleanup.
What's worthwile doing is to create a scripts/lib/ directory and move
common functions like read_file there. This patch just brings the fourth
implementation of this function.
Anyway, this patch makes it easy later to replace the read_file
implementation with a common implementation later, so I applied it, also
the rest of this series.

Sascha


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