diff options
Diffstat (limited to 'locale/charmap.c')
| -rw-r--r-- | locale/charmap.c | 524 |
1 files changed, 0 insertions, 524 deletions
diff --git a/locale/charmap.c b/locale/charmap.c deleted file mode 100644 index ad1075e..0000000 --- a/locale/charmap.c +++ /dev/null @@ -1,524 +0,0 @@ -/* Copyright (C) 1995 Free Software Foundation, Inc. - -The GNU C Library is free software; you can redistribute it and/or -modify it under the terms of the GNU Library General Public License as -published by the Free Software Foundation; either version 2 of the -License, or (at your option) any later version. - -The GNU C Library is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -Library General Public License for more details. - -You should have received a copy of the GNU Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the Free Software Foundation, Inc., 675 Mass Ave, -Cambridge, MA 02139, USA. */ - -#include <ctype.h> -#include <errno.h> -#include <libintl.h> -#include <limits.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#include "localedef.h" -#include "hash.h" - -/* Data structure for representing charmap database. */ -struct charmap charmap_data; - -/* Line number in charmap file. */ -static unsigned int line_no; - -/* Prototypes for local functions. */ -static void read_prolog (FILE *infile); -static unsigned long read_body (FILE *infile); - - -/* Read complete table of symbolic names for character set from file. If - this file does not exist or is not readable a default file is tried. - If this also is not readable no character map is defined. */ -void -charmap_read (const char *filename) -{ - unsigned long max_char; - long path_max = pathconf (".", _PC_PATH_MAX); - char buf[path_max]; - FILE *infile = NULL; - - /* Initialize charmap data. */ - charmap_data.codeset_name = NULL; - charmap_data.mb_cur_max = -1; - charmap_data.mb_cur_min = -1; - charmap_data.escape_char = '\\'; - charmap_data.comment_char = '#'; - - if (filename != NULL) - { - strcpy (buf, filename); - infile = fopen (filename, "r"); - if (infile == NULL && filename[0] != '/') - { - snprintf (buf, path_max, "%s/%s", CHARMAP_PATH, filename); - infile = fopen (buf, "r"); - } - } - if (infile == NULL) - { - if (filename != NULL) - error (0, errno, gettext ("input file `%s' not found"), filename); - - snprintf (buf, path_max, "%s/%s", CHARMAP_PATH, DEFAULT_CHARMAP); - infile = fopen (buf, "r"); - - if (infile == NULL) - error (4, errno, gettext ("input file `%s' not found"), filename); - } - - charmap_data.filename = buf; - init_hash (&charmap_data.table, 500); - line_no = 0; - - /* Read the prolog of the charmap file. */ - read_prolog (infile); - - /* Last works on the charmap tables global data. */ - if (charmap_data.mb_cur_max == -1) - charmap_data.mb_cur_max = 1; - if (charmap_data.mb_cur_min == -1) - charmap_data.mb_cur_min = charmap_data.mb_cur_max; - - if ((size_t) charmap_data.mb_cur_max > sizeof (long)) - { - error (2, 0, gettext ("program limitation: for now only upto %Zu " - "bytes per character are allowed"), sizeof (long)); - } - - /* Now process all entries. */ - max_char = read_body (infile); - - /* We don't need the file anymore. */ - fclose (infile); - - - /* Determine the optimal table size when using the simple modulo hashing - function. */ - if (max_char >= 256) - { - int size; - /* Current best values, initialized to some never reached high value. */ - int best_count = 10000; - int best_size = 10000; - int best_product = best_count * best_size; - - /* Give warning. */ - error (-1, 0, gettext ("computing character table size: this may take " - "a while")); - - for (size = 256; size <= best_product; ++size) - { - /* Array with slot counters. */ - int cnt[size]; - /* Current character. */ - int ch; - /* Maximal number of characters in any slot. */ - int maxcnt = 0; - /* Product of current size and maximal count. */ - int product = 0; - /* Iteration pointer through hashing table. */ - char *ptr = NULL; - - /* Initializes counters to zero. */ - memset(cnt, 0, size * sizeof (int)); - - /* Iterate through whole hashing table. */ - while (product < best_product - && iterate_table (&charmap_data.table, (void **) &ptr, - (void **) &ch)) - { - /* Increment slot counter. */ - ++cnt[ch % size]; - /* Test for current maximum. */ - if (cnt[ch % size] > maxcnt) - { - maxcnt = cnt[ch % size]; - product = maxcnt * size; - } - } - - if (product < best_product) - { - best_count = maxcnt; - best_size = size; - best_product = best_count * best_size; - } - } - - charmap_data.hash_size = best_size; - charmap_data.hash_layers = best_count; - } - else - { - charmap_data.hash_size = 256; - charmap_data.hash_layers = 1; - } -} - - -#define SYNTAX_ERROR \ - do { error (0, 0, gettext ("%s:%u: syntax error in charmap file"), \ - charmap_data.filename, line_no); \ - goto end_of_loop; } while (0) - -/* Read the prolog of the charmap file until the line containing `CHARMAP'. - All possible entries are processed. */ -static void -read_prolog (FILE *infile) -{ - size_t bufsize = sysconf (_SC_LINE_MAX); - char buf[bufsize]; - - while (1) - { - char *cp = buf; - char len; - - /* Read the next line. */ - fgets (buf, bufsize, infile); - len = strlen (buf); - - /* On EOF simply return. */ - if (len == 0 || buf[len - 1] != '\n') - error (4, 0, gettext ("%s: unexpected end of file in charmap"), - charmap_data.filename); - - /* This is the next line. */ - ++line_no; - - /* Comments and empty lines are ignored. */ - if (len == 1 || buf[0] == charmap_data.comment_char) - continue; - - buf[len - 1] = '\0'; - - /* Throw away leading white spaces. This is not defined in POSIX.2 - so don't do it if conformance is requested. */ - if (!posix_conformance) - while (isspace (*cp)) - ++cp; - - /* If `CHARMAP' is read the prolog is over. */ - if (strncmp (cp, "CHARMAP", 7) == 0 - && (!posix_conformance || cp[7] == '\0')) - return; - - /* Now it can be only one of special symbols defining the charmap - parameters. All are beginning with '<'. */ - if (*cp != '<') - SYNTAX_ERROR; - - ++cp; - if (strncmp (cp, "code_set_name>", 14) == 0) - { - char *startp; - -#define cp_to_arg(no,pred) \ - cp += no; \ - while (isspace (*cp)) \ - ++cp; \ - if (*cp == '\0' || !pred (*cp)) \ - SYNTAX_ERROR; - - cp_to_arg (14,isgraph) - - if (charmap_data.codeset_name != NULL) - { - error (0, 0, gettext ("%s:%u: duplicate code set name " - "specification"), - charmap_data.filename, line_no); - free (charmap_data.codeset_name); - } - - startp = cp; - while (*cp != '\0' && isgraph (*cp) && !isspace (*cp)) - ++cp; - - charmap_data.codeset_name = (char *) xmalloc (cp - startp + 1); - strncpy (startp, startp, cp - startp); - } - else if (strncmp (cp, "mb_cur_max>", 11) == 0) - { - int new_val; - cp_to_arg (11,isdigit) - - if (charmap_data.mb_cur_max != -1) - error (0, 0, - gettext ("%s:%u: duplicate definition of mb_cur_max"), - charmap_data.filename, line_no); - - new_val = (int) strtol (cp, &cp, posix_conformance ? 10 : 0); - if (new_val < 1) - error (0, 0, gettext ("%s:%u: illegal value for mb_cur_max: %d"), - charmap_data.filename, line_no, new_val); - else - charmap_data.mb_cur_max = new_val; - } - else if (strncmp (cp, "mb_cur_min>", 11) == 0) - { - int new_val; - cp_to_arg (11,isdigit) - - if (charmap_data.mb_cur_max != -1) - error (0, 0, - gettext ("%s:%u: duplicate definition of mb_cur_min"), - charmap_data.filename, line_no); - - new_val = (int) strtol (cp, &cp, posix_conformance ? 10 : 0); - if (new_val < 1) - error (0, 0, gettext ("%s:%u: illegal value for mb_cur_min: %d"), - charmap_data.filename, line_no, new_val); - else - charmap_data.mb_cur_min = new_val; - } - else if (strncmp (cp, "escape_char>", 12) == 0) - { - cp_to_arg (12, isgraph) - charmap_data.escape_char = *cp; - } - else if (strncmp (cp, "comment_char>", 13) == 0) - { - cp_to_arg (13, isgraph) - charmap_data.comment_char = *cp; - } - else - SYNTAX_ERROR; - end_of_loop: - } -} -#undef cp_to_arg - - -static unsigned long -read_body (FILE *infile) -{ - unsigned long max_char = 0; - size_t bufsize = sysconf (_SC_LINE_MAX); - char buf[bufsize]; - char name_str[bufsize / 2]; - char code_str[bufsize / 2]; - - while (1) - { - char *cp = buf; - size_t len; - - /* Read the next line. */ - fgets (buf, bufsize, infile); - len = strlen (buf); - - /* On EOF simply return. */ - if (len == 0) - error (0, 0, gettext ("%s: `END CHARMAP' is missing"), - charmap_data.filename); - - /* This is the next line. */ - ++line_no; - - if (len == bufsize - 1) - { - error (0, 0, gettext ("%s:%u: line too long; use `getconf " - "LINE_MAX' to get the current maximum line" - "length"), charmap_data.filename, line_no); - do - { - fgets (buf, bufsize, infile); - len = strlen (buf); - } - while (len == bufsize - 1); - continue; - } - - /* Comments and empty lines are ignored. */ - if (len == 1 || buf[0] == charmap_data.comment_char) - continue; - - buf[len - 1] = '\0'; - - /* Throw away leading white spaces. This is not defined in POSIX.2 - so don't do it if conformance is requested. */ - if (!posix_conformance) - while (isspace (*cp)) - ++cp; - - if (*cp == '<') - { - char *end1p, *end2p, *start2p; - size_t cnt = 0; - unsigned long char_value = 0; - - if (sscanf (cp + 1, "%s %s", name_str, code_str) != 2) - SYNTAX_ERROR; - - end1p = cp = name_str; - while (*cp != '\0' && *cp != '>') - { - if (*cp == charmap_data.escape_char) - if (*++cp == '\0') - SYNTAX_ERROR; - *end1p++ = *cp++; - } - if (*cp == '\0') - /* No final '>'. Make error condition. */ - end1p = name_str; - else - ++cp; - - *end1p = '\0'; - - if (*cp == '.' && *++cp == '.' && *++cp == '.' && *++cp == '<') - { - /* This might be the alternate form. */ - start2p = end2p = ++cp; - while (*cp != '\0' && *cp != '>') - { - if (*cp == charmap_data.escape_char) - if (*++cp == '\0') - SYNTAX_ERROR; - *end2p = *cp++; - } - if (*cp == '\0') - /* NO final '>'. Make error condition. */ - end2p = start2p; - else - ++cp; - } - else - start2p = end2p = NULL; - - - if (end1p == name_str || (start2p != NULL && start2p != end2p) - || *cp != '\0' - || *code_str != charmap_data.escape_char) - SYNTAX_ERROR; - - cp = code_str; - do - { - char *begin; - long val; - - switch (*++cp) - { - case 'd': - val = strtol ((begin = cp + 1), &cp, 10); - break; - case 'x': - val = strtol ((begin = cp + 1), &cp, 16); - break; - default: - val = strtol ((begin = cp), &cp, 8); - break; - } - if (begin == cp) - SYNTAX_ERROR; - - if (posix_conformance && cp - begin < 2) - error (0, 0, gettext ("%s:%u: byte constant has less than " - "two digits"), - charmap_data.filename, line_no); - - if (val < 0 || val > 255) - { - error (0, 0, gettext ("%s:%u: character encoding must be " - "given in 8-bit bytes"), - charmap_data.filename, line_no); - goto end_of_loop; - } - - if (cnt < (size_t) charmap_data.mb_cur_max) - { - if (cnt < sizeof (long)) /* FIXME */ - char_value = (char_value << 8) | val; - } - else - { - error (0, 0, gettext ("%s:%u: number of bytes in character " - "definition exceeds `mb_cur_max'"), - charmap_data.filename, line_no); - break; - } - ++cnt; - } - while (*cp == charmap_data.escape_char); - - /* Ignore the rest of the line (comment). */ - if (end2p == NULL) - { - if (insert_entry (&charmap_data.table, name_str, - end1p - name_str, (void *) char_value)) - error (0, 0, gettext ("%s:%u: duplicate entry"), - charmap_data.filename, line_no); - - max_char = MAX (max_char, char_value); - } - else - { - char *en1, *en2, *start1p; - long n1, n2, n; - - start1p = name_str; - - while (*start1p == *start2p && !isdigit (*start1p) - && start1p < end1p) - ++start1p, ++start2p; - - n1 = strtol (start1p, &en1, 10); - n2 = strtol (start2p, &en2, 10); - - if (en1 - start1p != en2 - start2p || en1 != end1p - || en2 != end2p) - SYNTAX_ERROR; - - if (n1 > n2) - error (0, 0, gettext ("%s:%u: starting character is bigger " - "than last"), - charmap_data.filename, line_no); - - n = n1; - while (n <= n2) - { - snprintf(start1p, en1 - start1p, "%0*d", en1 - start1p, n); - - if (insert_entry (&charmap_data.table, name_str, - en1 - name_str, - (void *) (char_value + n - n1))) - error (0, 0, gettext ("%s:%u: duplicate entry"), - charmap_data.filename, line_no); - - max_char = MAX (max_char, char_value + n - n1); - ++n; - } - } - } - else - { - if (strncmp (cp, "END CHARMAP", 11) == 0) - return max_char; - - SYNTAX_ERROR; - } - end_of_loop: - } - - return max_char; -} - -/* - * Local Variables: - * mode:c - * c-basic-offset:2 - * End: - */ |