Mercurial > cpython-lru_cache-weakref

annotate Python/strerror.c @ 28406:733729261c41 legacy-trunk

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SF patch #707257: Improve code generation Adds a single function to improve generated bytecode. Has a single line attachment point, so it is completely de-coupled from both the compiler and ceval.c. Makes three simple transforms that do not require a basic block analysis or re-ordering of code. Gives improved timings on pystone, pybench, and any code using either "while 1" or "x,y=y,x".
author Raymond Hettinger <python@rcn.com>
date Wed, 26 Mar 2003 01:07:54 +0000
parents 379fc66f4c96
children 86fdf8fe7f17
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Guido van Rossum <guido@python.org>
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2 /* PD implementation of strerror() for systems that don't have it.
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3 Author: Guido van Rossum, CWI Amsterdam, Oct. 1990, <guido@cwi.nl>. */
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5 #include <stdio.h>
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6 #include "Python.h"
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8 extern int sys_nerr;
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9 extern char *sys_errlist[];
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11 char *
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12 strerror(int err)
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13 {
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14 static char buf[20];
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15 if (err >= 0 && err < sys_nerr)
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16 return sys_errlist[err];
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17 PyOS_snprintf(buf, sizeof(buf), "Unknown errno %d", err);
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18 return buf;
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19 }
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21 #ifdef macintosh
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22 int sys_nerr = 0;
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23 char *sys_errlist[1] = 0;
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24 #endif