URL
https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk
Subversion Repositories openrisc_me
[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [newlib/] [libc/] [iconv/] [lib/] [aliasesi.c] - Rev 148
Go to most recent revision | Compare with Previous | Blame | View Log
/* * Copyright (c) 2003-2004, Artem B. Bityuckiy * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <_ansi.h> #include <reent.h> #include <newlib.h> #include <sys/types.h> #include <string.h> #include <stdlib.h> #include <errno.h> #include <ctype.h> #include <sys/iconvnls.h> #include "local.h" /* * strnstr - locate a substring in a fixed-size string. * * PARAMETERS: * _CONST char *haystack - the string in which to search. * _CONST char *needle - the string which to search. * int length - the maximum 'haystack' string length. * * DESCRIPTION: * The strstr() function finds the first occurrence of the substring * 'needle' in the string 'haystack'. At most 'length' bytes are searched. * * RETURN: * Returns a pointer to the beginning of substring, or NULL if substring * was not found. */ static char * _DEFUN(strnstr, (haystack, needle, length), _CONST char *haystack _AND _CONST char *needle _AND int length) { _CONST char *max = haystack + length; if (*haystack == '\0') return *needle == '\0' ? (char *)haystack : (char *)NULL; while (haystack < max) { int i = 0; while (1) { if (needle[i] == '\0') return (char *)haystack; if (needle[i] != haystack[i]) break; i += 1; } haystack += 1; } return (char *)NULL; } /* * canonical_form - canonize 'str'. * * PARAMETERS: * struct _reent *rptr - reent structure of current thread/process. * _CONST char *str - string to canonize. * * DESCRIPTION: * Converts all letters to small and substitute all '-' characters by '_' * characters. * * RETURN: * Returns canonical form of 'str' if success, NULL if failure. */ static _CONST char * _DEFUN(canonical_form, (rptr, str), struct _reent *rptr _AND _CONST char *str) { char *p, *p1; if (str == NULL || (p = p1 = _strdup_r (rptr, str)) == NULL) return (_CONST char *)NULL; for (; *str; str++, p++) { if (*str == '-') *p = '_'; else *p = tolower (*str); } return (_CONST char *)p1; } /* * find_alias - find encoding name name by it's alias. * * PARAMETERS: * struct _reent *rptr - reent structure of current thread/process. * _CONST char *alias - alias by which "official" name should be found. * _CONST char *table - aliases table. * int len - aliases table length. * * DESCRIPTION: * 'table' contains the list of encoding names and aliases. * Names go first, e.g.: * * name1 alias11 alias12 alias1N * name2 alias21 alias22 alias2N * nameM aliasM1 aliasM2 aliasMN * * If line begins with backspace it is considered as the continuation of * previous line. * * RETURN: * Returns pointer to name found if success. In case of error returns NULL * and sets current thread's/process's errno. */ static char * _DEFUN(find_alias, (rptr, alias, table, len), struct _reent *rptr _AND _CONST char *alias _AND _CONST char *table _AND int len) { _CONST char *end; _CONST char *p; int l = strlen (alias); _CONST char *ptable = table; _CONST char *table_end = table + len; if (table == NULL || alias == NULL || *table == '\0' || *alias == '\0') return NULL; search_again: if (len < l || (p = strnstr (ptable, alias, len)) == NULL) return NULL; /* Check that substring is segregated by '\n', '\t' or ' ' */ if (!((p == table || isspace (*(p-1)) || *(p-1) == '\n') && (p+l == table_end || isspace (*(p+l)) || *(p+l) == '\n'))) { ptable = p + l; len -= table - p; goto search_again; } while(--p > table && *p != '\n'); if (*(++p) == '#') return NULL; for (end = p + 1; !isspace (*end) && *end != '\n' && *end != '\0'; end++); return _strndup_r (rptr, p, (size_t)(end - p)); } /* * _iconv_resolve_encoding_name - resolves encoding's name by given alias. * * PARAMETERS: * struct _reent *rptr - reent structure of current thread/process. * _CONST char *ca - encoding alias to resolve. * * DESCRIPTION: * First, tries to find 'ca' among built-in aliases. If not found, tries to * find it external file. * * RETURN: * Encoding name if found. In case of error returns NULL * and sets current thread's/process's errno. */ char * _DEFUN(_iconv_resolve_encoding_name, (rptr, cname, path), struct _reent *rptr _AND _CONST char *ca) { char *p = (char *)ca; /* Alias shouldn't contain white spaces, '\n' and '\r' symbols */ while (*p) if (*p == ' ' || *p == '\r' || *p++ == '\n') return NULL; if ((ca = canonical_form (rptr, ca)) == NULL) return NULL; p = find_alias (rptr, ca, _iconv_aliases, strlen (_iconv_aliases)); _free_r (rptr, (_VOID_PTR)ca); return p; }
Go to most recent revision | Compare with Previous | Blame | View Log