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/*@@
@file String.c
@date Tue May 2 10:44:19 2000
@author Tom Goodale
@desc
Routines dealing with strings.
@enddesc
@version $Id$
@@*/
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <ctype.h>
#include "util_String.h"
#include "cctk_Flesh.h"
static const char *rcsid = "$Header$";
CCTK_FILEVERSION(util_String_c)
/********************************************************************
********************* Local Data Types ***********************
********************************************************************/
/********************************************************************
********************* Local Routine Prototypes *********************
********************************************************************/
/********************************************************************
********************* Other Routine Prototypes *********************
********************************************************************/
/********************************************************************
********************* Local Data *****************************
********************************************************************/
/********************************************************************
********************* External Routines **********************
********************************************************************/
/*@@
@routine CCTK_StrSep
@date Tue May 2 10:29:07 2000
@author Tom Goodale
@desc
The strsep() function returns the next token from the string stringp which is delimited by delim. The token
is terminated with a `\0' character and stringp is updated to point past the token.
RETURN VALUE
The strsep() function returns a pointer to the token, or NULL if delim is not found in stringp.
@enddesc
@calls
@calledby
@history
@endhistory
@var stringp
@vdesc The string to search for a token in.
@vtype const char **stringp
@vio inout
@vcomment
@endvar
@var delim
@vdesc The delimiter
@vtype const char *delim
@vio in
@vcomment
@endvar
@returntype const char *
@returndesc
a pointer to the token, or NULL if delim is not found in stringp.
@endreturndesc
@@*/
const char *Util_StrSep(const char **stringp, const char *delim)
{
int retlength = 0;
static char *retval = NULL;
char *temp;
const char *start;
const char *end;
start = *stringp;
end = strstr(start, delim);
/* Is the delimiter part of the string */
if(end)
{
if(retlength < (end-start)+1)
{
temp = realloc(retval, (end-start+1));
if(temp)
{
retval = temp;
retlength = end-start+1;
}
else
{
free(retval);
retval = NULL;
retlength = 0;
}
}
if(retval)
{
strncpy(retval, start, (size_t)(end-start));
retval[end-start] = '\0';
*stringp = end+strlen(delim);
}
}
else
{
free(retval);
retval = NULL;
retlength = 0;
}
return retval;
}
/*@@
@routine Util_SplitString
@date Wed Jan 20 10:14:00 1999
@author Tom Goodale
@desc
Splits a string into two parts at the given seperator.
Assigns memory for the two resulting strings, so this should be freed
when no longer needed.
@enddesc
@calls
@calledby
@history
@endhistory
@var before
@vdesc String before seperator
@vtype char **
@vio out
@vcomment
@endvar
@var after
@vdesc String after seperator
@vtype char **
@vio out
@vcomment
@endvar
@var string
@vdesc String to seperate
@vtype const char *
@vio in
@vcomment
@endvar
@var sep
@vdesc String seperator
@vtype const char *
@vio in
@vcomment
@endvar
@returntype int
@returndesc
0 - success
1 - seperator not found
2 - out of memory
@endreturndesc
@@*/
int Util_SplitString(char **before, char **after, const char *string, const char *sep)
{
int retval=0;
char *position;
/* Find location of the seperator */
position = strstr(string, sep);
if(position)
{
/*Allocate memory for return strings. */
*before = (char *)malloc((size_t)((position-string+1)*sizeof(char)));
*after = (char *)malloc((size_t)((strlen(string)-(position-string)-strlen(sep)+1)*sizeof(char)));
/* Check that the allocation succeeded. */
if(!*before || !*after)
{
free(*before);
*before = NULL;
free(*after);
*after = NULL;
retval = 2;
}
else
{
retval = 3;
}
}
else
{
*before = NULL;
*after = NULL;
retval = 1;
}
if(position && *before && *after)
{
/* Copy the data */
strncpy(*before, string, (int)(position-string));
(*before)[(int)(position-string)] = '\0';
strncpy(*after, position+strlen(sep), strlen(string)-(int)(position-string)-strlen(sep));
(*after)[strlen(string)-(position-string)-strlen(sep)] = '\0';
retval = 0;
}
return retval;
}
/*@@
@routine Util_Strdup
@date Thu Mar 28 11:20:27 2000
@author Gerd Lanfermann
@desc
Homegrown ersion of strdup, since it's not guaranteed to be there.
@enddesc
@calls
@calledby
@history
@endhistory
@var s
@vdesc string to be duplicated
@vtype const char *
@vio in
@vcomment
@endvar
@returntype char *
@returndesc
the duplicate string.
@endreturndesc
@@*/
char *Util_Strdup(const char *s)
{
char *retstr=NULL;
retstr = (char*) malloc((strlen(s)+1)*sizeof(char));
if(retstr)
{
strcpy(retstr,s);
}
return retstr;
}
/*@@
@routine Util_StrCmpi
@date Mon Jul 5 01:19:00 1999
@author Tom Goodale
@desc
Case independent strcmp
@enddesc
@calls
@calledby
@history
@hdate Wed Oct 13 15:30:57 1999 @hauthor Tom Goodale
@hdesc Checks the length of the two string first.
@endhistory
@var string1
@vdesc First string in comparison
@vtype const char *
@vio in
@vcomment
@endvar
@var string2
@vdesc Second string in comparison
@vtype const char *
@vio in
@vcomment
@endvar
@returntype int
@returndesc
+ve - string1 > string2
0 - string1 = string2
-ve - string1 < string2
@endreturndesc
@@*/
int Util_StrCmpi (const char *string1, const char *string2)
{
int retval;
do
{
retval = tolower (*string1) - tolower (*string2);
} while (! retval && *string1++ && *string2++);
return (retval);
}
/*@
@routine Util_SplitFilename
@date Wed Oct 4 10:14:00 2000
@author Gabrielle Allen
@desc
Splits a filename into its directory and basic filename parts.
Assigns memory for the two resulting strings, so this should be freed
when no longer needed.
@enddesc
@calls
@calledby
@history
@endhistory
@var dir
@vdesc The directory part
@vtype char **
@vio out
@vcomment
@endvar
@var file
@vdesc The file part
@vtype char **
@vio out
@vcomment
@endvar
@var string
@vdesc The string to split
@vtype const char *
@vio out
@vcomment
@endvar
@returntype int
@returndesc
0 - success
-1 - out of memory
@endreturndesc
@@*/
int Util_SplitFilename (char **dir, char **file, const char *string)
{
char *position;
*file = Util_Strdup (string);
if (*file)
{
/* Find location of the seperator */
position = strrchr (*file, '/');
if (position)
{
*dir = *file;
*position = 0;
*file = Util_Strdup (position + 1);
}
else
{
*dir = NULL;
}
}
return (*file ? 0 : -1);
}
/*@@
@routine Util_asprintf
@date Thu May 24 16:55:26 2001
@author Tom Goodale
@desc
Sprintf with memory allocation. On input
the buffer should point to a NULL area of memory.
@enddesc
@calls
@calledby
@history
@endhistory
@var buffer
@vdesc Buffer to which to print the string.
@vtype char **
@vio out
@vcomment
*buffer should be NULL on entry. The routine
allocates the memory, so the previous contents of
the pointer are lost.
On exit the buffer size will be return-value+1 (i.e
the length of the string plus the \0 ).
@endvar
@var format
@vdesc sprintf format string
@vtype const char *
@vio in
@vcomment
This is a standard sprintf format string.
@endvar
@var ...
@vdesc Rest of arguments
@vtype varargs
@vio in
@vcomment
These are the arguments necessary for the format string.
@endvar
@returntype int
@returndesc
The number of bytes written to the buffer.
@endreturndesc
@@*/
int Util_asprintf(char **buffer, const char *fmt, ...)
{
int count;
va_list args;
va_start(args,fmt);
count = Util_vsnprintf(NULL, 0, fmt, args);
*buffer = (char *)malloc(count+1);
if(*buffer)
{
va_start(args,fmt);
Util_vsnprintf(*buffer,count+1,fmt,args);
va_end(args);
}
else
{
count = 0;
}
return count;
}
/*@@
@routine Util_asprintf
@date Thu May 24 16:55:26 2001
@author Tom Goodale
@desc
Sprintf with memory allocation if necessary. On input
the buffer should point to an area of memory of length 'size' .
@enddesc
@calls
@calledby
@history
@endhistory
@var buffer
@vdesc Buffer to which to print the string.
@vtype char **
@vio out
@vcomment
Buffer to which to print string. If the buffer is too
small, the buffer is freed and a new buffer big enough to hold
the string and its null-termination is created.
@endvar
@var size
@vdesc initial size of the buffer
@vtype int
@vio in
@vcomment
This is the initial size of the buffer.
@endvar
@var format
@vdesc sprintf format string
@vtype const char *
@vio in
@vcomment
This is a standard sprintf format string.
@endvar
@var ...
@vdesc Rest of arguments
@vtype varargs
@vio in
@vcomment
These are the arguments necessary for the format string.
@endvar
@returntype int
@returndesc
The number of bytes written to the buffer.
@endreturndesc
@@*/
int Util_asnprintf(char **buffer, size_t size, const char *fmt, ...)
{
size_t count;
va_list args;
va_start(args,fmt);
count = Util_vsnprintf(NULL, 0, fmt, args);
if(count+1 > size)
{
/* Use free followed by malloc as realloc may copy memory
* we are not interested in.
*/
free(*buffer);
*buffer = (char *)malloc(count+1);
}
if(*buffer)
{
va_start(args,fmt);
Util_vsnprintf(*buffer,count+1,fmt,args);
va_end(args);
}
else
{
count = 0;
}
return count;
}
/********************************************************************
********************* Local Routines *************************
********************************************************************/
#ifdef TEST_Util_STRSEP
#include <stdio.h>
int main(int argc, char *argv[])
{
const char *argument;
char *delim;
const char *token;
if(argc < 3)
{
printf("Usage: %s <string> <delim>\n", argv[0]);
exit(1);
}
argument = argv[1];
delim = argv[2];
while((token = Util_StrSep(&argument, delim)))
{
printf("Token is '%s'\n", token);
}
if(argument - argv[1] < strlen(argv[1]))
{
printf("Remainder is '%s'\n", argument);
}
return 0;
}
#endif /*TEST_CCTK_STRSEP */
|