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To: vim_dev@googlegroups.com
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Subject: Patch 7.4.026
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Fcc: outbox
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From: Bram Moolenaar <Bram@moolenaar.net>
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Mime-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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------------
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Patch 7.4.026
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Problem: Clang warning for int shift overflow.
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Solution: Use unsigned and cast back to int. (Dominique Pelle)
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Files: src/misc2.c
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*** ../vim-7.4.025/src/misc2.c 2013-07-07 16:03:35.000000000 +0200
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--- src/misc2.c 2013-09-08 16:04:54.000000000 +0200
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***************
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*** 6496,6508 ****
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get4c(fd)
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FILE *fd;
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{
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! int n;
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! n = getc(fd);
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! n = (n << 8) + getc(fd);
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! n = (n << 8) + getc(fd);
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! n = (n << 8) + getc(fd);
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! return n;
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}
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/*
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--- 6496,6510 ----
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get4c(fd)
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FILE *fd;
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{
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! /* Use unsigned rather than int otherwise result is undefined
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! * when left-shift sets the MSB. */
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! unsigned n;
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! n = (unsigned)getc(fd);
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! n = (n << 8) + (unsigned)getc(fd);
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! n = (n << 8) + (unsigned)getc(fd);
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! n = (n << 8) + (unsigned)getc(fd);
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! return (int)n;
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}
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/*
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*** ../vim-7.4.025/src/version.c 2013-09-08 16:03:40.000000000 +0200
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--- src/version.c 2013-09-08 16:05:40.000000000 +0200
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***************
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*** 740,741 ****
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--- 740,743 ----
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{ /* Add new patch number below this line */
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+ /**/
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+ 26,
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/**/
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--
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A computer program does what you tell it to do, not what you want it to do.
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/// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net \\\
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/// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
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\\\ an exciting new programming language -- http://www.Zimbu.org ///
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\\\ help me help AIDS victims -- http://ICCF-Holland.org ///
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