1 2 #include <petsc-private/viewerimpl.h> /*I "petscsys.h" I*/ 3 #include <stdarg.h> 4 #if defined(PETSC_HAVE_STDLIB_H) 5 #include <stdlib.h> 6 #endif 7 8 typedef struct { 9 char *string; /* string where info is stored */ 10 char *head; /* pointer to begining of unused portion */ 11 size_t curlen,maxlen; 12 } PetscViewer_String; 13 14 #undef __FUNCT__ 15 #define __FUNCT__ "PetscViewerDestroy_String" 16 static PetscErrorCode PetscViewerDestroy_String(PetscViewer viewer) 17 { 18 PetscViewer_String *vstr = (PetscViewer_String *)viewer->data; 19 PetscErrorCode ierr; 20 21 PetscFunctionBegin; 22 ierr = PetscFree(vstr);CHKERRQ(ierr); 23 PetscFunctionReturn(0); 24 } 25 26 #undef __FUNCT__ 27 #define __FUNCT__ "PetscViewerStringSPrintf" 28 /*@C 29 PetscViewerStringSPrintf - Prints information to a PetscViewer string. 30 31 Logically Collective on PetscViewer (Hmmm, each processor maintains a separate string) 32 33 Input Parameters: 34 + v - a string PetscViewer, formed by PetscViewerStringOpen() 35 - format - the format of the input 36 37 Level: developer 38 39 Fortran Note: 40 This routine is not supported in Fortran. 41 42 Concepts: printing^to string 43 44 .seealso: PetscViewerStringOpen() 45 @*/ 46 PetscErrorCode PetscViewerStringSPrintf(PetscViewer viewer,const char format[],...) 47 { 48 va_list Argp; 49 size_t fullLength; 50 size_t shift; 51 PetscErrorCode ierr; 52 PetscBool isstring; 53 char tmp[4096]; 54 PetscViewer_String *vstr = (PetscViewer_String*)viewer->data; 55 56 PetscFunctionBegin; 57 PetscValidHeaderSpecific(viewer,PETSC_VIEWER_CLASSID,1); 58 PetscValidCharPointer(format,2); 59 ierr = PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERSTRING,&isstring);CHKERRQ(ierr); 60 if (!isstring) PetscFunctionReturn(0); 61 if (!vstr->string) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ORDER,"Must call PetscViewerStringSetString() before using"); 62 63 va_start(Argp,format); 64 ierr = PetscVSNPrintf(tmp,4096,format,&fullLength,Argp);CHKERRQ(ierr); 65 va_end(Argp); 66 67 ierr = PetscStrlen(tmp,&shift);CHKERRQ(ierr); 68 if (shift >= vstr->maxlen - vstr->curlen - 1) shift = vstr->maxlen - vstr->curlen - 1; 69 ierr = PetscStrncpy(vstr->head,tmp,shift);CHKERRQ(ierr); 70 71 vstr->head += shift; 72 vstr->curlen += shift; 73 PetscFunctionReturn(0); 74 } 75 76 #undef __FUNCT__ 77 #define __FUNCT__ "PetscViewerStringOpen" 78 /*@C 79 PetscViewerStringOpen - Opens a string as a PetscViewer. This is a very 80 simple PetscViewer; information on the object is simply stored into 81 the string in a fairly nice way. 82 83 Collective on MPI_Comm 84 85 Input Parameters: 86 + comm - the communicator 87 . string - the string to use 88 - len - the string length 89 90 Output Parameter: 91 . lab - the PetscViewer 92 93 Level: advanced 94 95 Fortran Note: 96 This routine is not supported in Fortran. 97 98 Concepts: PetscViewerString^creating 99 100 .seealso: PetscViewerDestroy(), PetscViewerStringSPrintf() 101 @*/ 102 PetscErrorCode PetscViewerStringOpen(MPI_Comm comm,char string[],PetscInt len,PetscViewer *lab) 103 { 104 PetscErrorCode ierr; 105 106 PetscFunctionBegin; 107 ierr = PetscViewerCreate(comm,lab);CHKERRQ(ierr); 108 ierr = PetscViewerSetType(*lab,PETSCVIEWERSTRING);CHKERRQ(ierr); 109 ierr = PetscViewerStringSetString(*lab,string,len);CHKERRQ(ierr); 110 PetscFunctionReturn(0); 111 } 112 113 #undef __FUNCT__ 114 #define __FUNCT__ "PetscViewerGetSingleton_String" 115 PetscErrorCode PetscViewerGetSingleton_String(PetscViewer viewer,PetscViewer *sviewer) 116 { 117 PetscViewer_String *vstr = (PetscViewer_String*)viewer->data; 118 PetscErrorCode ierr; 119 120 PetscFunctionBegin; 121 ierr = PetscViewerStringOpen(PETSC_COMM_SELF,vstr->head,vstr->maxlen-vstr->curlen,sviewer);CHKERRQ(ierr); 122 PetscFunctionReturn(0); 123 } 124 125 #undef __FUNCT__ 126 #define __FUNCT__ "PetscViewerRestoreSingleton_String" 127 PetscErrorCode PetscViewerRestoreSingleton_String(PetscViewer viewer,PetscViewer *sviewer) 128 { 129 PetscErrorCode ierr; 130 PetscViewer_String *iviewer = (PetscViewer_String*)(*sviewer)->data; 131 PetscViewer_String *vstr = (PetscViewer_String*)viewer->data; 132 133 PetscFunctionBegin; 134 vstr->head = iviewer->head; 135 vstr->curlen += iviewer->curlen; 136 ierr = PetscViewerDestroy(sviewer);CHKERRQ(ierr); 137 PetscFunctionReturn(0); 138 } 139 140 EXTERN_C_BEGIN 141 #undef __FUNCT__ 142 #define __FUNCT__ "PetscViewerCreate_String" 143 PetscErrorCode PetscViewerCreate_String(PetscViewer v) 144 { 145 PetscViewer_String *vstr; 146 PetscErrorCode ierr; 147 148 PetscFunctionBegin; 149 v->ops->destroy = PetscViewerDestroy_String; 150 v->ops->view = 0; 151 v->ops->flush = 0; 152 v->ops->getsingleton = PetscViewerGetSingleton_String; 153 v->ops->restoresingleton = PetscViewerRestoreSingleton_String; 154 ierr = PetscNewLog(v,PetscViewer_String,&vstr);CHKERRQ(ierr); 155 v->data = (void*)vstr; 156 vstr->string = 0; 157 PetscFunctionReturn(0); 158 } 159 EXTERN_C_END 160 161 #undef __FUNCT__ 162 #define __FUNCT__ "PetscViewerStringSetString" 163 /*@C 164 165 PetscViewerStringSetString - sets the string that a string viewer will print to 166 167 Logically Collective on PetscViewer 168 169 Input Parameters: 170 + viewer - string viewer you wish to attach string to 171 . string - the string to print data into 172 - len - the length of the string 173 174 Level: advanced 175 176 .seealso: PetscViewerStringOpen() 177 @*/ 178 PetscErrorCode PetscViewerStringSetString(PetscViewer viewer,char string[],PetscInt len) 179 { 180 PetscViewer_String *vstr = (PetscViewer_String*)viewer->data; 181 PetscErrorCode ierr; 182 PetscBool isstring; 183 184 PetscFunctionBegin; 185 PetscValidHeaderSpecific(viewer,PETSC_VIEWER_CLASSID,1); 186 PetscValidCharPointer(string,2); 187 ierr = PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERSTRING,&isstring);CHKERRQ(ierr); 188 if (!isstring) PetscFunctionReturn(0); 189 if (len <= 2) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"String must have length at least 2"); 190 191 ierr = PetscMemzero(string,len*sizeof(char));CHKERRQ(ierr); 192 vstr->string = string; 193 vstr->head = string; 194 vstr->curlen = 0; 195 vstr->maxlen = len; 196 PetscFunctionReturn(0); 197 } 198 199 200 201 202 203 204