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Viewing changes to gsl/specfunc/.svn/text-base/cheb_eval.c.svn-base

  • Committer: Bazaar Package Importer
  • Author(s): Loïc Minier
  • Date: 2010-04-10 11:08:53 UTC
  • mfrom: (1.1.12 upstream)
  • Revision ID: james.westby@ubuntu.com-20100410110853-5w0vep9aa9qqr9lx
Tags: 1.2.1-0ubuntu1
https://launchpad.net/bugs/557468
https://launchpad.net/bugs/320829
* New upstream bugfix release; LP: #557468.
  - Fixes parsing of the first line of the body in MIME messages;
    LP: #320829.

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gsl/specfunc/.svn/text-base/cheb_eval.c.svn-base
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static inline int
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cheb_eval_e(const cheb_series * cs,
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            const double x,
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            gsl_sf_result * result)
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{
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  int j;
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  double d  = 0.0;
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  double dd = 0.0;
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  double y  = (2.0*x - cs->a - cs->b) / (cs->b - cs->a);
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  double y2 = 2.0 * y;
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  double e = 0.0;
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  for(j = cs->order; j>=1; j--) {
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    double temp = d;
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    d = y2*d - dd + cs->c[j];
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    e += fabs(y2*temp) + fabs(dd) + fabs(cs->c[j]);
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    dd = temp;
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  }
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  { 
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    double temp = d;
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    d = y*d - dd + 0.5 * cs->c[0];
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    e += fabs(y*temp) + fabs(dd) + 0.5 * fabs(cs->c[0]);
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  }
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  result->val = d;
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  result->err = GSL_DBL_EPSILON * e + fabs(cs->c[cs->order]);
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  return GSL_SUCCESS;
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}
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