GCC Code Coverage Report

Directory: ./
File: src/sys/classes/fn/tests/test9.c
Date: 2026-02-22 03:58:10
Exec Total Coverage
Lines: 32 32 100.0%
Functions: 1 1 100.0%
Branches: 91 140 65.0%
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1 /*
2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3 SLEPc - Scalable Library for Eigenvalue Problem Computations
4 Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain
5
6 This file is part of SLEPc.
7 SLEPc is distributed under a 2-clause BSD license (see LICENSE).
8 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
9 */
10
11 static char help[] = "Test logarithm function.\n\n";
12
13 #include <slepcfn.h>
14
15 8 int main(int argc,char **argv)
16 {
17 8 FN fn;
18 8 PetscScalar x,y,yp,tau,eta;
19 8 char strx[50],str[50];
20
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 8 PetscFunctionBeginUser;
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 8 PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
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 8 PetscCall(FNCreate(PETSC_COMM_WORLD,&fn));
24
25 /* plain logarithm log(x) */
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 8 PetscCall(FNSetType(fn,FNLOG));
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 8 PetscCall(FNView(fn,NULL));
28 8 x = 2.2;
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 8 PetscCall(SlepcSNPrintfScalar(strx,sizeof(strx),x,PETSC_FALSE));
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 8 PetscCall(FNEvaluateFunction(fn,x,&y));
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 8 PetscCall(FNEvaluateDerivative(fn,x,&yp));
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 8 PetscCall(SlepcSNPrintfScalar(str,sizeof(str),y,PETSC_FALSE));
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 8 PetscCall(PetscPrintf(PETSC_COMM_WORLD," f(%s)=%s\n",strx,str));
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 8 PetscCall(SlepcSNPrintfScalar(str,sizeof(str),yp,PETSC_FALSE));
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 8 PetscCall(PetscPrintf(PETSC_COMM_WORLD," f'(%s)=%s\n",strx,str));
36
37 /* logarithm with scaling factors eta*log(tau*x) */
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 8 PetscCall(FNSetType(fn,FNLOG));
39 8 tau = 0.2;
40 8 eta = 1.3;
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 8 PetscCall(FNSetScale(fn,tau,eta));
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 8 PetscCall(FNView(fn,NULL));
43 8 x = 2.2;
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 8 PetscCall(SlepcSNPrintfScalar(strx,sizeof(strx),x,PETSC_FALSE));
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 8 PetscCall(FNEvaluateFunction(fn,x,&y));
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 8 PetscCall(FNEvaluateDerivative(fn,x,&yp));
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 8 PetscCall(SlepcSNPrintfScalar(str,sizeof(str),y,PETSC_FALSE));
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 8 PetscCall(PetscPrintf(PETSC_COMM_WORLD," f(%s)=%s\n",strx,str));
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 8 PetscCall(SlepcSNPrintfScalar(str,sizeof(str),yp,PETSC_FALSE));
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 8 PetscCall(PetscPrintf(PETSC_COMM_WORLD," f'(%s)=%s\n",strx,str));
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 8 PetscCall(FNDestroy(&fn));
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 8 PetscCall(SlepcFinalize());
54 return 0;
55 }
56
57 /*TEST
58
59 test:
60 suffix: 1
61 nsize: 1
62 filter: grep -v "computing matrix functions"
63
64 TEST*/
65