Mercurial > cpython-lru_cache-weakref

annotate Python/hypot.c @ 18065:889db6d55506 legacy-trunk

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SF bug 430991: wrong co_lnotab Armin Rigo pointed out that the way the line-# table got built didn't work for lines generating more than 255 bytes of bytecode. Fixed as he suggested, plus corresponding changes to pyassem.py, plus added some long overdue docs about this subtle table to compile.c. Bugfix candidate (line numbers may be off in tracebacks under -O).
author Tim Peters <tim.peters@gmail.com>
date Sat, 09 Jun 2001 09:26:21 +0000
parents 59f8cedcf049
children 2dea40e40d9d
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1 /* hypot() replacement */
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2
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3 #include "config.h"
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59f8cedcf049 merge Include/my*.h into Include/pyport.h
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4 #include "pyport.h"
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5
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f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
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6 double hypot(double x, double y)
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7 {
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8 double yx;
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9
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10 x = fabs(x);
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11 y = fabs(y);
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12 if (x < y) {
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13 double temp = x;
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14 x = y;
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15 y = temp;
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16 }
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17 if (x == 0.)
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18 return 0.;
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19 else {
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20 yx = y/x;
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21 return x*sqrt(1.+yx*yx);
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22 }
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23 }