Actual source code: str.c
1: #define PETSC_DLL
2: /*
3: We define the string operations here. The reason we just do not use
4: the standard string routines in the PETSc code is that on some machines
5: they are broken or have the wrong prototypes.
7: */
8: #include petsc.h
9: #include petscsys.h
10: #if defined(PETSC_HAVE_STRING_H)
11: #include <string.h>
12: #endif
13: #if defined(PETSC_HAVE_STRINGS_H)
14: #include <strings.h>
15: #endif
16: #include "petscfix.h"
20: /*@C
21: PetscStrlen - Gets length of a string
23: Not Collective
25: Input Parameters:
26: . s - pointer to string
28: Output Parameter:
29: . len - length in bytes
31: Level: intermediate
33: Note:
34: This routine is analogous to strlen().
36: Null string returns a length of zero
38: Concepts: string length
39:
40: @*/
41: PetscErrorCode PetscStrlen(const char s[],size_t *len)
42: {
44: if (!s) {
45: *len = 0;
46: } else {
47: *len = strlen(s);
48: }
49: return(0);
50: }
54: /*@C
55: PetscStrallocpy - Allocates space to hold a copy of a string then copies the string
57: Not Collective
59: Input Parameters:
60: . s - pointer to string
62: Output Parameter:
63: . t - the copied string
65: Level: intermediate
67: Note:
68: Null string returns a new null string
70: Concepts: string copy
71:
72: @*/
73: PetscErrorCode PetscStrallocpy(const char s[],char *t[])
74: {
76: size_t len;
77: char *tmp = 0;
80: if (s) {
81: PetscStrlen(s,&len);
82: PetscMalloc((1+len)*sizeof(char),&tmp);
83: PetscStrcpy(tmp,s);
84: }
85: *t = tmp;
86: return(0);
87: }
91: /*@C
92: PetscStrcpy - Copies a string
94: Not Collective
96: Input Parameters:
97: . t - pointer to string
99: Output Parameter:
100: . s - the copied string
102: Level: intermediate
104: Note:
105: Null string returns a string starting with zero
107: Concepts: string copy
108:
109: .seealso: PetscStrncpy(), PetscStrcat(), PetscStrncat()
111: @*/
112: PetscErrorCode PetscStrcpy(char s[],const char t[])
113: {
115: if (t && !s) {
116: SETERRQ(PETSC_ERR_ARG_NULL,"Trying to copy string into null pointer");
117: }
118: if (t) {strcpy(s,t);}
119: else if (s) {s[0] = 0;}
120: return(0);
121: }
125: /*@C
126: PetscStrncpy - Copies a string up to a certain length
128: Not Collective
130: Input Parameters:
131: + t - pointer to string
132: - n - the length to copy
134: Output Parameter:
135: . s - the copied string
137: Level: intermediate
139: Note:
140: Null string returns a string starting with zero
142: Concepts: string copy
144: .seealso: PetscStrcpy(), PetscStrcat(), PetscStrncat()
145:
146: @*/
147: PetscErrorCode PetscStrncpy(char s[],const char t[],size_t n)
148: {
150: if (t && !s) {
151: SETERRQ(PETSC_ERR_ARG_NULL,"Trying to copy string into null pointer");
152: }
153: if (t) {strncpy(s,t,n);}
154: else if (s) {s[0] = 0;}
155: return(0);
156: }
160: /*@C
161: PetscStrcat - Concatenates a string onto a given string
163: Not Collective
165: Input Parameters:
166: + s - string to be added to
167: - t - pointer to string to be added to end
169: Level: intermediate
171: Concepts: string copy
173: .seealso: PetscStrcpy(), PetscStrncpy(), PetscStrncat()
174:
175: @*/
176: PetscErrorCode PetscStrcat(char s[],const char t[])
177: {
179: strcat(s,t);
180: return(0);
181: }
185: /*@C
186: PetscStrncat - Concatenates a string onto a given string, up to a given length
188: Not Collective
190: Input Parameters:
191: + s - pointer to string to be added to end
192: . t - string to be added to
193: . n - maximum length to copy
195: Level: intermediate
197: Concepts: string copy
199: .seealso: PetscStrcpy(), PetscStrncpy(), PetscStrcat()
200:
201: @*/
202: PetscErrorCode PetscStrncat(char s[],const char t[],size_t n)
203: {
205: strncat(s,t,n);
206: return(0);
207: }
211: /*@C
212: PetscStrcmp - Compares two strings,
214: Not Collective
216: Input Parameters:
217: + a - pointer to string first string
218: - b - pointer to second string
220: Output Parameter:
221: . flg - if the two strings are equal
223: Level: intermediate
225: .seealso: PetscStrgrt(), PetscStrncmp(), PetscStrcasecmp()
227: @*/
228: PetscErrorCode PetscStrcmp(const char a[],const char b[],PetscTruth *flg)
229: {
230: int c;
233: if (!a && !b) {
234: *flg = PETSC_TRUE;
235: } else if (!a || !b) {
236: *flg = PETSC_FALSE;
237: } else {
238: c = strcmp(a,b);
239: if (c) *flg = PETSC_FALSE;
240: else *flg = PETSC_TRUE;
241: }
242: return(0);
243: }
247: /*@C
248: PetscStrgrt - If first string is greater than the second
250: Not Collective
252: Input Parameters:
253: + a - pointer to first string
254: - b - pointer to second string
256: Output Parameter:
257: . flg - if the first string is greater
259: Notes:
260: Null arguments are ok, a null string is considered smaller than
261: all others
263: Level: intermediate
265: .seealso: PetscStrcmp(), PetscStrncmp(), PetscStrcasecmp()
267: @*/
268: PetscErrorCode PetscStrgrt(const char a[],const char b[],PetscTruth *t)
269: {
270: int c;
273: if (!a && !b) {
274: *t = PETSC_FALSE;
275: } else if (a && !b) {
276: *t = PETSC_TRUE;
277: } else if (!a && b) {
278: *t = PETSC_FALSE;
279: } else {
280: c = strcmp(a,b);
281: if (c > 0) *t = PETSC_TRUE;
282: else *t = PETSC_FALSE;
283: }
284: return(0);
285: }
289: /*@C
290: PetscStrcasecmp - Returns true if the two strings are the same
291: except possibly for case.
293: Not Collective
295: Input Parameters:
296: + a - pointer to first string
297: - b - pointer to second string
299: Output Parameter:
300: . flg - if the two strings are the same
302: Notes:
303: Null arguments are ok
305: Level: intermediate
307: .seealso: PetscStrcmp(), PetscStrncmp(), PetscStrgrt()
309: @*/
310: PetscErrorCode PetscStrcasecmp(const char a[],const char b[],PetscTruth *t)
311: {
312: int c;
315: if (!a && !b) c = 0;
316: else if (!a || !b) c = 1;
317: #if defined(PETSC_HAVE_STRICMP)
318: else c = stricmp(a,b);
319: #else
320: else c = strcasecmp(a,b);
321: #endif
322: if (!c) *t = PETSC_TRUE;
323: else *t = PETSC_FALSE;
324: return(0);
325: }
329: /*@C
330: PetscStrncmp - Compares two strings, up to a certain length
332: Not Collective
334: Input Parameters:
335: + a - pointer to first string
336: . b - pointer to second string
337: - n - length to compare up to
339: Output Parameter:
340: . t - if the two strings are equal
342: Level: intermediate
344: .seealso: PetscStrgrt(), PetscStrcmp(), PetscStrcasecmp()
346: @*/
347: PetscErrorCode PetscStrncmp(const char a[],const char b[],size_t n,PetscTruth *t)
348: {
349: int c;
352: c = strncmp(a,b,n);
353: if (!c) *t = PETSC_TRUE;
354: else *t = PETSC_FALSE;
355: return(0);
356: }
360: /*@C
361: PetscStrchr - Locates first occurance of a character in a string
363: Not Collective
365: Input Parameters:
366: + a - pointer to string
367: - b - character
369: Output Parameter:
370: . c - location of occurance, PETSC_NULL if not found
372: Level: intermediate
374: @*/
375: PetscErrorCode PetscStrchr(const char a[],char b,char *c[])
376: {
378: *c = (char *)strchr(a,b);
379: return(0);
380: }
384: /*@C
385: PetscStrrchr - Locates one location past the last occurance of a character in a string,
386: if the character is not found then returns entire string
388: Not Collective
390: Input Parameters:
391: + a - pointer to string
392: - b - character
394: Output Parameter:
395: . tmp - location of occurance, a if not found
397: Level: intermediate
399: @*/
400: PetscErrorCode PetscStrrchr(const char a[],char b,char *tmp[])
401: {
403: *tmp = (char *)strrchr(a,b);
404: if (!*tmp) *tmp = (char*)a; else *tmp = *tmp + 1;
405: return(0);
406: }
410: /*@C
411: PetscStrtolower - Converts string to lower case
413: Not Collective
415: Input Parameters:
416: . a - pointer to string
418: Level: intermediate
420: @*/
421: PetscErrorCode PetscStrtolower(char a[])
422: {
424: while (*a) {
425: if (*a >= 'A' && *a <= 'Z') *a += 'a' - 'A';
426: a++;
427: }
428: return(0);
429: }
433: /*@C
434: PetscTokenFind - Locates next "token" in a string
436: Not Collective
438: Input Parameters:
439: . a - pointer to token
441: Output Parameter:
442: . result - location of occurance, PETSC_NULL if not found
444: Notes:
446: This version is different from the system version in that
447: it allows you to pass a read-only string into the function.
449: Level: intermediate
451: .seealso: PetscTokenCreate(), PetscTokenDestroy()
452: @*/
453: PetscErrorCode PetscTokenFind(PetscToken *a,char *result[])
454: {
455: char *ptr = a->current;
458: *result = a->current;
459: if (ptr && !*ptr) *result = 0;
460: while (ptr) {
461: if (*ptr == a->token) {
462: *ptr++ = 0;
463: while (*ptr == a->token) ptr++;
464: a->current = ptr;
465: break;
466: }
467: if (!*ptr) {
468: a->current = 0;
469: break;
470: }
471: ptr++;
472: }
473: return(0);
474: }
478: /*@C
479: PetscTokenCreate - Creates a PetscToken used to find tokens in a string
481: Not Collective
483: Input Parameters:
484: + string - the string to look in
485: - token - the character to look for
487: Output Parameter:
488: . a - pointer to token
490: Notes:
492: This version is different from the system version in that
493: it allows you to pass a read-only string into the function.
495: Level: intermediate
497: .seealso: PetscTokenFind(), PetscTokenDestroy()
498: @*/
499: PetscErrorCode PetscTokenCreate(const char a[],const char b,PetscToken **t)
500: {
504: PetscNew(PetscToken,t);
505: PetscStrallocpy(a,&(*t)->array);
506: (*t)->current = (*t)->array;
507: (*t)->token = b;
508: return(0);
509: }
513: /*@C
514: PetscTokenDestroy - Destroys a PetscToken
516: Not Collective
518: Input Parameters:
519: . a - pointer to token
521: Level: intermediate
523: .seealso: PetscTokenCreate(), PetscTokenFind()
524: @*/
525: PetscErrorCode PetscTokenDestroy(PetscToken *a)
526: {
530: PetscFree(a->array);
531: PetscFree(a);
532: return(0);
533: }
537: /*@C
538: PetscStrrstr - Locates last occurance of string in another string
540: Not Collective
542: Input Parameters:
543: + a - pointer to string
544: - b - string to find
546: Output Parameter:
547: . tmp - location of occurance
549: Level: intermediate
551: @*/
552: PetscErrorCode PetscStrrstr(const char a[],const char b[],char *tmp[])
553: {
554: const char *stmp = a, *ltmp = 0;
557: while (stmp) {
558: stmp = (char *)strstr(stmp,b);
559: if (stmp) {ltmp = stmp;stmp++;}
560: }
561: *tmp = (char *)ltmp;
562: return(0);
563: }
567: /*@C
568: PetscStrstr - Locates first occurance of string in another string
570: Not Collective
572: Input Parameters:
573: + a - pointer to string
574: - b - string to find
576: Output Parameter:
577: . tmp - location of occurance
579: Level: intermediate
581: @*/
582: PetscErrorCode PetscStrstr(const char a[],const char b[],char *tmp[])
583: {
585: *tmp = (char *)strstr(a,b);
586: return(0);
587: }
591: /*@C
592: PetscGetPetscDir - Gets the directory PETSc is installed in
594: Not Collective
596: Output Parameter:
597: . dir - the directory
599: Level: developer
601: @*/
602: PetscErrorCode PetscGetPetscDir(const char *dir[])
603: {
605: *dir = PETSC_DIR;
606: return(0);
607: }
611: /*@C
612: PetscStrreplace - Replaces substrings in string with other substrings
614: Not Collective
616: Input Parameters:
617: + comm - MPI_Comm of processors that are processing the string
618: . aa - the string to look in
619: . b - the resulting copy of a with replaced strings (b can be the same as a)
620: - len - the length of b
622: Notes:
623: Replaces ${PETSC_ARCH},${PETSC_DIR},${PETSC_LIB_DIR},${DISPLAY},
624: ${HOMEDIRECTORY},${WORKINGDIRECTORY},${USERNAME} with appropriate values
625: as well as any environmental variables.
626:
627: Level: intermediate
629: @*/
630: PetscErrorCode PetscStrreplace(MPI_Comm comm,const char aa[],char b[],size_t len)
631: {
633: int i = 0;
634: size_t l,l1,l2,l3;
635: char *work,*par,*epar,env[1024],*tfree,*a = (char*)aa;
636: const char *s[] = {"${PETSC_ARCH}","${PETSC_DIR}","${PETSC_LIB_DIR}","${DISPLAY}","${HOMEDIRECTORY}","${WORKINGDIRECTORY}","${USERNAME}",0};
637: const char *r[] = {PETSC_ARCH,PETSC_DIR,PETSC_LIB_DIR,0,0,0,0,0};
638: PetscTruth flag;
641: if (!a || !b) SETERRQ(PETSC_ERR_ARG_NULL,"a and b strings must be nonnull");
642: if (aa == b) {
643: PetscStrallocpy(aa,(char **)&a);
644: }
645: PetscMalloc(len*sizeof(char*),&work);
647: /* get values for replaced variables */
648: PetscMalloc(256*sizeof(char),&r[4]);
649: PetscMalloc(PETSC_MAX_PATH_LEN*sizeof(char),&r[5]);
650: PetscMalloc(PETSC_MAX_PATH_LEN*sizeof(char),&r[6]);
651: PetscMalloc(256*sizeof(char),&r[7]);
652: PetscGetDisplay((char*)r[4],256);
653: PetscGetHomeDirectory((char*)r[5],PETSC_MAX_PATH_LEN);
654: PetscGetWorkingDirectory((char*)r[6],PETSC_MAX_PATH_LEN);
655: PetscGetUserName((char*)r[7],256);
657: /* replace the requested strings */
658: PetscStrncpy(b,a,len);
659: while (s[i]) {
660: PetscStrlen(s[i],&l);
661: PetscStrstr(b,s[i],&par);
662: while (par) {
663: *par = 0;
664: par += l;
666: PetscStrlen(b,&l1);
667: PetscStrlen(r[i],&l2);
668: PetscStrlen(par,&l3);
669: if (l1 + l2 + l3 >= len) {
670: SETERRQ(PETSC_ERR_ARG_SIZ,"b len is not long enough to hold new values");
671: }
672: PetscStrcpy(work,b);
673: PetscStrcat(work,r[i]);
674: PetscStrcat(work,par);
675: PetscStrncpy(b,work,len);
676: PetscStrstr(b,s[i],&par);
677: }
678: i++;
679: }
680: for ( i=4; i<8; i++){
681: tfree = (char*)r[i];
682: PetscFree(tfree);
683: }
685: /* look for any other ${xxx} strings to replace from environmental variables */
686: PetscStrstr(b,"${",&par);
687: while (par) {
688: *par = 0;
689: par += 2;
690: PetscStrcpy(work,b);
691: PetscStrstr(par,"}",&epar);
692: *epar = 0;
693: epar += 1;
694: PetscOptionsGetenv(comm,par,env,256,&flag);
695: if (!flag) {
696: SETERRQ1(PETSC_ERR_ARG_WRONG,"Substitution string ${%s} not found as environmental variable",par);
697: }
698: PetscStrcat(work,env);
699: PetscStrcat(work,epar);
700: PetscStrcpy(b,work);
701: PetscStrstr(b,"${",&par);
702: }
703: PetscFree(work);
704: if (aa == b) {
705: PetscFree(a);
706: }
707: return(0);
708: }
710: /*MC
711: PetscStrfree - Frees a string (if it is not null)
713: Not Collective
715: Synopsis:
716: PetscErrorCode PetscStrfree(char *s)
718: Input Parameter:
719: . s - pointer to string
721: Level: intermediate
723: Concepts: string free
724:
725: .seealso: PetscStrncpy(), PetscStrcat(), PetscStrncat(), PetscStrallocpy()
727: M*/