gecko/nsprpub/lib/libc/include/plstr.h
2008-06-06 08:36:51 -04:00

471 lines
15 KiB
C

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape Portable Runtime (NSPR).
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Roland Mainz <roland mainz@informatik.med.uni-giessen.de>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef _plstr_h
#define _plstr_h
/*
* plstr.h
*
* This header file exports the API to the NSPR portable library or string-
* handling functions.
*
* This API was not designed as an "optimal" or "ideal" string library; it
* was based on the good ol' unix string.3 functions, and was written to
*
* 1) replace the libc functions, for cross-platform consistency,
* 2) complete the API on platforms lacking common functions (e.g.,
* strcase*), and
* 3) to implement some obvious "closure" functions that I've seen
* people hacking around in our code.
*
* Point number three largely means that most functions have an "strn"
* limited-length version, and all comparison routines have a non-case-
* sensitive version available.
*/
#include "prtypes.h"
PR_BEGIN_EXTERN_C
/*
* PL_strlen
*
* Returns the length of the provided string, not including the trailing '\0'.
*/
PR_EXTERN(PRUint32)
PL_strlen(const char *str);
/*
* PL_strnlen
*
* Returns the length of the provided string, not including the trailing '\0',
* up to the indicated maximum. The string will not be examined beyond the
* maximum; if no terminating '\0' is found, the maximum will be returned.
*/
PR_EXTERN(PRUint32)
PL_strnlen(const char *str, PRUint32 max);
/*
* PL_strcpy
*
* Copies the source string, up to and including the trailing '\0', into the
* destination buffer. It does not (can not) verify that the destination
* buffer is large enough. It returns the "dest" argument.
*/
PR_EXTERN(char *)
PL_strcpy(char *dest, const char *src);
/*
* PL_strncpy
*
* Copies the source string into the destination buffer, up to and including
* the trailing '\0' or up to and including the max'th character, whichever
* comes first. It does not (can not) verify that the destination buffer is
* large enough. If the source string is longer than the maximum length,
* the result will *not* be null-terminated (JLRU).
*/
PR_EXTERN(char *)
PL_strncpy(char *dest, const char *src, PRUint32 max);
/*
* PL_strncpyz
*
* Copies the source string into the destination buffer, up to and including
* the trailing '\0' or up but not including the max'th character, whichever
* comes first. It does not (can not) verify that the destination buffer is
* large enough. The destination string is always terminated with a '\0',
* unlike the traditional libc implementation. It returns the "dest" argument.
*
* NOTE: If you call this with a source "abcdefg" and a max of 5, the
* destination will end up with "abcd\0" (i.e., its strlen length will be 4)!
*
* This means you can do this:
*
* char buffer[ SOME_SIZE ];
* PL_strncpyz(buffer, src, sizeof(buffer));
*
* and the result will be properly terminated.
*/
PR_EXTERN(char *)
PL_strncpyz(char *dest, const char *src, PRUint32 max);
/*
* PL_strdup
*
* Returns a pointer to a malloc'd extent of memory containing a duplicate
* of the argument string. The size of the allocated extent is one greater
* than the length of the argument string, because of the terminator. A
* null argument, like a zero-length argument, will result in a pointer to
* a one-byte extent containing the null value. This routine returns null
* upon malloc failure.
*/
PR_EXTERN(char *)
PL_strdup(const char *s);
/*
* PL_strfree
*
* Free memory allocated by PL_strdup
*/
PR_EXTERN(void)
PL_strfree(char *s);
/*
* PL_strndup
*
* Returns a pointer to a malloc'd extent of memory containing a duplicate
* of the argument string, up to the maximum specified. If the argument
* string has a length greater than the value of the specified maximum, the
* return value will be a pointer to an extent of memory of length one
* greater than the maximum specified. A null string, a zero-length string,
* or a zero maximum will all result in a pointer to a one-byte extent
* containing the null value. This routine returns null upon malloc failure.
*/
PR_EXTERN(char *)
PL_strndup(const char *s, PRUint32 max);
/*
* PL_strcat
*
* Appends a copy of the string pointed to by the second argument to the
* end of the string pointed to by the first. The destination buffer is
* not (can not be) checked for sufficient size. A null destination
* argument returns null; otherwise, the first argument is returned.
*/
PR_EXTERN(char *)
PL_strcat(char *dst, const char *src);
/*
* PL_strncat
*
* Appends a copy of the string pointed to by the second argument, up to
* the maximum size specified, to the end of the string pointed to by the
* first. The destination buffer is not (can not be) checked for sufficient
* size. A null destination argument returns null; otherwise, the first
* argument is returned. If the maximum size limits the copy, then the
* result will *not* be null-terminated (JLRU). A null destination
* returns null; otherwise, the destination argument is returned.
*/
PR_EXTERN(char *)
PL_strncat(char *dst, const char *src, PRUint32 max);
/*
* PL_strcatn
*
* Appends a copy of the string pointed to by the third argument, to the
* end of the string pointed to by the first. The second argument specifies
* the maximum size of the destination buffer, including the null termination.
* If the existing string in dst is longer than the max, no action is taken.
* The resulting string will be null-terminated. A null destination returns
* null; otherwise, the destination argument is returned.
*/
PR_EXTERN(char *)
PL_strcatn(char *dst, PRUint32 max, const char *src);
/*
* PL_strcmp
*
* Returns an integer, the sign of which -- positive, zero, or negative --
* reflects the lexical sorting order of the two strings indicated. The
* result is positive if the first string comes after the second. The
* NSPR implementation is not i18n.
*/
PR_EXTERN(PRIntn)
PL_strcmp(const char *a, const char *b);
/*
* PL_strncmp
*
* Returns an integer, the sign of which -- positive, zero, or negative --
* reflects the lexical sorting order of the two strings indicated, up to
* the maximum specified. The result is positive if the first string comes
* after the second. The NSPR implementation is not i18n. If the maximum
* is zero, only the existance or non-existance (pointer is null) of the
* strings is compared.
*/
PR_EXTERN(PRIntn)
PL_strncmp(const char *a, const char *b, PRUint32 max);
/*
* PL_strcasecmp
*
* Returns an integer, the sign of which -- positive, zero or negative --
* reflects the case-insensitive lexical sorting order of the two strings
* indicated. The result is positive if the first string comes after the
* second. The NSPR implementation is not i18n.
*/
PR_EXTERN(PRIntn)
PL_strcasecmp(const char *a, const char *b);
/*
* PL_strncasecmp
*
* Returns an integer, the sign of which -- positive, zero or negative --
* reflects the case-insensitive lexical sorting order of the first n characters
* of the two strings indicated. The result is positive if the first string comes
* after the second. The NSPR implementation is not i18n.
*/
PR_EXTERN(PRIntn)
PL_strncasecmp(const char *a, const char *b, PRUint32 max);
/*
* PL_strchr
*
* Returns a pointer to the first instance of the specified character in the
* provided string. It returns null if the character is not found, or if the
* provided string is null. The character may be the null character.
*/
PR_EXTERN(char *)
PL_strchr(const char *s, char c);
/*
* PL_strrchr
*
* Returns a pointer to the last instance of the specified character in the
* provided string. It returns null if the character is not found, or if the
* provided string is null. The character may be the null character.
*/
PR_EXTERN(char *)
PL_strrchr(const char *s, char c);
/*
* PL_strnchr
*
* Returns a pointer to the first instance of the specified character within the
* first n characters of the provided string. It returns null if the character
* is not found, or if the provided string is null. The character may be the
* null character.
*/
PR_EXTERN(char *)
PL_strnchr(const char *s, char c, PRUint32 n);
/*
* PL_strnrchr
*
* Returns a pointer to the last instance of the specified character within the
* first n characters of the provided string. It returns null if the character is
* not found, or if the provided string is null. The character may be the null
* character.
*/
PR_EXTERN(char *)
PL_strnrchr(const char *s, char c, PRUint32 n);
/*
* NOTE: Looking for strcasechr, strcaserchr, strncasechr, or strncaserchr?
* Use strpbrk, strprbrk, strnpbrk or strnprbrk.
*/
/*
* PL_strpbrk
*
* Returns a pointer to the first instance in the first string of any character
* (not including the terminating null character) of the second string. It returns
* null if either string is null.
*/
PR_EXTERN(char *)
PL_strpbrk(const char *s, const char *list);
/*
* PL_strprbrk
*
* Returns a pointer to the last instance in the first string of any character
* (not including the terminating null character) of the second string. It returns
* null if either string is null.
*/
PR_EXTERN(char *)
PL_strprbrk(const char *s, const char *list);
/*
* PL_strnpbrk
*
* Returns a pointer to the first instance (within the first n characters) of any
* character (not including the terminating null character) of the second string.
* It returns null if either string is null.
*/
PR_EXTERN(char *)
PL_strnpbrk(const char *s, const char *list, PRUint32 n);
/*
* PL_strnprbrk
*
* Returns a pointer to the last instance (within the first n characters) of any
* character (not including the terminating null character) of the second string.
* It returns null if either string is null.
*/
PR_EXTERN(char *)
PL_strnprbrk(const char *s, const char *list, PRUint32 n);
/*
* PL_strstr
*
* Returns a pointer to the first instance of the little string within the
* big one. It returns null if either string is null.
*/
PR_EXTERN(char *)
PL_strstr(const char *big, const char *little);
/*
* PL_strrstr
*
* Returns a pointer to the last instance of the little string within the big one.
* It returns null if either string is null.
*/
PR_EXTERN(char *)
PL_strrstr(const char *big, const char *little);
/*
* PL_strnstr
*
* Returns a pointer to the first instance of the little string within the first
* n characters of the big one. It returns null if either string is null. It
* returns null if the length of the little string is greater than n.
*/
PR_EXTERN(char *)
PL_strnstr(const char *big, const char *little, PRUint32 n);
/*
* PL_strnrstr
*
* Returns a pointer to the last instance of the little string within the first
* n characters of the big one. It returns null if either string is null. It
* returns null if the length of the little string is greater than n.
*/
PR_EXTERN(char *)
PL_strnrstr(const char *big, const char *little, PRUint32 max);
/*
* PL_strcasestr
*
* Returns a pointer to the first instance of the little string within the big one,
* ignoring case. It returns null if either string is null.
*/
PR_EXTERN(char *)
PL_strcasestr(const char *big, const char *little);
/*
* PL_strcaserstr
*
* Returns a pointer to the last instance of the little string within the big one,
* ignoring case. It returns null if either string is null.
*/
PR_EXTERN(char *)
PL_strcaserstr(const char *big, const char *little);
/*
* PL_strncasestr
*
* Returns a pointer to the first instance of the little string within the first
* n characters of the big one, ignoring case. It returns null if either string is
* null. It returns null if the length of the little string is greater than n.
*/
PR_EXTERN(char *)
PL_strncasestr(const char *big, const char *little, PRUint32 max);
/*
* PL_strncaserstr
*
* Returns a pointer to the last instance of the little string within the first
* n characters of the big one, ignoring case. It returns null if either string is
* null. It returns null if the length of the little string is greater than n.
*/
PR_EXTERN(char *)
PL_strncaserstr(const char *big, const char *little, PRUint32 max);
/*
* PL_strtok_r
*
* Splits the string s1 into tokens, separated by one or more characters
* from the separator string s2. The argument lasts points to a
* user-supplied char * pointer in which PL_strtok_r stores information
* for it to continue scanning the same string.
*
* In the first call to PL_strtok_r, s1 points to a string and the value
* of *lasts is ignored. PL_strtok_r returns a pointer to the first
* token, writes '\0' into the character following the first token, and
* updates *lasts.
*
* In subsequent calls, s1 is null and lasts must stay unchanged from the
* previous call. The separator string s2 may be different from call to
* call. PL_strtok_r returns a pointer to the next token in s1. When no
* token remains in s1, PL_strtok_r returns null.
*/
PR_EXTERN(char *)
PL_strtok_r(char *s1, const char *s2, char **lasts);
/*
* Things not (yet?) included: strspn/strcspn, strsep.
* memchr, memcmp, memcpy, memccpy, index, rindex, bcmp, bcopy, bzero.
* Any and all i18n/l10n stuff.
*/
PR_END_EXTERN_C
#endif /* _plstr_h */