diff options
Diffstat (limited to 'locale/programs/charmap.c')
| -rw-r--r-- | locale/programs/charmap.c | 593 |
1 files changed, 593 insertions, 0 deletions
diff --git a/locale/programs/charmap.c b/locale/programs/charmap.c new file mode 100644 index 0000000..2b71821 --- /dev/null +++ b/locale/programs/charmap.c @@ -0,0 +1,593 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>. + +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., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <ctype.h> +#include <errno.h> +#include <libintl.h> +#include <obstack.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "error.h" +#include "linereader.h" +#include "charset.h" + + +/* Uncomment following line for production version. */ +/* define NDEBUG 1 */ +#include <assert.h> + + +/* Define the lookup function. */ +#include "charmap-kw.h" + + +void *xmalloc (size_t __n); + +/* Prototypes for local functions. */ +static struct charset_t *parse_charmap (const char *filename); + + + +struct charset_t * +charmap_read (const char *filename) +{ + const char *pathnfile; + struct charset_t *result = NULL; + + if (filename != NULL) + { + if (euidaccess (filename, R_OK) >= 0) + pathnfile = filename; + else + { + char *cp = xmalloc (strlen (filename) + sizeof CHARMAP_PATH + 1); + stpcpy (stpcpy (stpcpy (cp, CHARMAP_PATH), "/"), filename); + + pathnfile = (const char *) cp; + } + + result = parse_charmap (pathnfile); + + if (result == NULL) + error (0, errno, _("character map file `%s' not found"), filename); + } + + if (result == NULL) + { + pathnfile = CHARMAP_PATH "/" DEFAULT_CHARMAP; + + result = parse_charmap (pathnfile); + + if (result == NULL) + error (4, errno, _("default character map file `%s' not found"), + DEFAULT_CHARMAP); + } + + return result; +} + + +static struct charset_t * +parse_charmap (const char *filename) +{ + struct linereader *cmfile; + struct charset_t *result; + int state; + enum token_t expected_tok = tok_error; + const char *expected_str = NULL; + char *from_name = NULL; + char *to_name = NULL; + + /* Determine path. */ + cmfile = lr_open (filename, charmap_hash); + if (cmfile == NULL) + { + if (strchr (filename, '/') == NULL) + { + /* Look in the systems charmap directory. */ + char *buf = xmalloc (strlen (filename) + 1 + sizeof (CHARMAP_PATH)); + + stpcpy (stpcpy (stpcpy (buf, CHARMAP_PATH), "/"), filename); + cmfile = lr_open (buf, charmap_hash); + + if (cmfile == NULL) + free (buf); + } + + if (cmfile == NULL) + return NULL; + } + + /* Allocate room for result. */ + result = (struct charset_t *) xmalloc (sizeof (struct charset_t)); + memset (result, '\0', sizeof (struct charset_t)); + +#define obstack_chunk_alloc xmalloc +#define obstack_chunk_free free + obstack_init (&result->mem_pool); + + if (init_hash (&result->char_table, 256)) + { + free (result); + return NULL; + } + + /* We use a state machine to describe the charmap description file + format. */ + state = 1; + while (1) + { + /* What's on? */ + struct token *now = lr_token (cmfile, NULL); + enum token_t nowtok = now->tok; + struct token *arg; + + if (nowtok == tok_eof) + break; + + switch (state) + { + case 1: + /* The beginning. We expect the special declarations, EOL or + `CHARMAP'. */ + if (nowtok == tok_eol) + /* Ignore empty lines. */ + continue; + + if (nowtok == tok_charmap) + { + from_name = NULL; + to_name = NULL; + + /* We have to set up the real work. Fill in some + default values. */ + if (result->mb_cur_max == 0) + result->mb_cur_max = 1; + if (result->mb_cur_min == 0) + result->mb_cur_min = result->mb_cur_max; + if (result->mb_cur_min > result->mb_cur_max) + { + error (0, 0, _("\ +%s: <mb_cur_max> must be greater than <mb_cur_min>\n"), + cmfile->fname); + + result->mb_cur_min = result->mb_cur_max; + } + + lr_ignore_rest (cmfile, 1); + + state = 2; + continue; + } + + if (nowtok != tok_code_set_name && nowtok != tok_mb_cur_max + && nowtok != tok_mb_cur_min && nowtok != tok_escape_char + && nowtok != tok_comment_char && nowtok != tok_g0esc + && nowtok != tok_g1esc && nowtok != tok_g2esc + && nowtok != tok_g3esc) + { + lr_error (cmfile, _("syntax error in prolog: %s"), + _("illegal definition")); + + lr_ignore_rest (cmfile, 0); + continue; + } + + /* We know that we need an argument. */ + arg = lr_token (cmfile, NULL); + + switch (nowtok) + { + case tok_code_set_name: + if (arg->tok != tok_ident) + { + badarg: + lr_error (cmfile, _("syntax error in prolog: %s"), + _("bad argument")); + + lr_ignore_rest (cmfile, 0); + continue; + } + + result->code_set_name = obstack_copy0 (&result->mem_pool, + arg->val.str.start, + arg->val.str.len); + + lr_ignore_rest (cmfile, 1); + continue; + + case tok_mb_cur_max: + case tok_mb_cur_min: + if (arg->tok != tok_number) + goto badarg; + + if (arg->val.num < 1 || arg->val.num > 4) + { + lr_error (cmfile, + _("value for <%s> must lie between 1 and 4"), + nowtok == tok_mb_cur_min ? "mb_cur_min" + : "mb_cur_max"); + + lr_ignore_rest (cmfile, 0); + continue; + } + if ((nowtok == tok_mb_cur_max && result->mb_cur_min != 0 + && arg->val.num < result->mb_cur_min) + || (nowtok == tok_mb_cur_min && result->mb_cur_max != 0 + && arg->val.num > result->mb_cur_max)) + { + lr_error (cmfile, _("\ +value of <mb_cur_max> must be greater than the value of <mb_cur_min>")); + + lr_ignore_rest (cmfile, 0); + continue; + } + + if (nowtok == tok_mb_cur_max) + result->mb_cur_max = arg->val.num; + else + result->mb_cur_min = arg->val.num; + + lr_ignore_rest (cmfile, 1); + continue; + + case tok_escape_char: + case tok_comment_char: + if (arg->tok != tok_ident) + goto badarg; + + if (arg->val.str.len != 1) + { + lr_error (cmfile, _("\ +argument to <%s> must be a single character"), + nowtok == tok_escape_char ? "escape_char" + : "comment_char"); + + lr_ignore_rest (cmfile, 0); + continue; + } + + if (nowtok == tok_escape_char) + cmfile->escape_char = *arg->val.str.start; + else + cmfile->comment_char = *arg->val.str.start; + + lr_ignore_rest (cmfile, 1); + continue; + + case tok_g0esc: + case tok_g1esc: + case tok_g2esc: + case tok_g3esc: + lr_ignore_rest (cmfile, 0); /* XXX */ + continue; + + default: + /* Cannot happen. */ + assert (! "Should not happen"); + } + break; + + case 2: + /* We have seen `CHARMAP' and now are in the body. Each line + must have the format "%s %s %s\n" or "%s...%s %s %s\n". */ + if (nowtok == tok_eol) + /* Ignore empty lines. */ + continue; + + if (nowtok == tok_end) + { + expected_tok = tok_charmap; + expected_str = "CHARMAP"; + state = 90; + continue; + } + + if (nowtok != tok_bsymbol) + { + lr_error (cmfile, _("syntax error in %s definition: %s"), + "CHARMAP", _("no symbolic name given")); + + lr_ignore_rest (cmfile, 0); + continue; + } + + /* If the previous line was not completely correct free the + used memory. */ + if (from_name != NULL) + obstack_free (&result->mem_pool, from_name); + + from_name = (char *) obstack_copy0 (&result->mem_pool, + now->val.str.start, + now->val.str.len); + to_name = NULL; + + state = 3; + continue; + + case 3: + /* We have two possibilities: We can see an ellipsis or an + encoding value. */ + if (nowtok == tok_ellipsis) + { + state = 4; + continue; + } + /* FALLTHROUGH */ + + case 5: + if (nowtok != tok_charcode && nowtok != tok_ucs2 + && nowtok != tok_ucs4) + { + lr_error (cmfile, _("syntax error in %s definition: %s"), + "CHARMAP", _("illegal encoding given")); + + lr_ignore_rest (cmfile, 0); + + state = 2; + continue; + } + + if (nowtok == tok_charcode) + /* Write char value in table. */ + charset_new_char (cmfile, result, now->val.charcode.nbytes, + now->val.charcode.val, from_name, to_name); + else + /* Determine ISO 10646 value and write into table. */ + charset_new_unicode (cmfile, result, now->val.charcode.nbytes, + now->val.charcode.val, from_name, to_name); + + /* Ignore trailing comment silently. */ + lr_ignore_rest (cmfile, 0); + + from_name = NULL; + to_name = NULL; + + state = 2; + continue; + + case 4: + if (nowtok != tok_bsymbol) + { + lr_error (cmfile, _("syntax error in %s definition: %s"), + "CHARMAP", + _("no symbolic name given for end of range")); + + lr_ignore_rest (cmfile, 0); + continue; + } + + /* If the previous line was not completely correct free the + used memory. */ + to_name = (char *) obstack_copy0 (&result->mem_pool, + cmfile->token.val.str.start, + cmfile->token.val.str.len); + + state = 3; + continue; + + case 90: + if (nowtok != expected_tok) + lr_error (cmfile, _("\ +`%1$s' definition does not end with `END %1$s'"), expected_str); + + lr_ignore_rest (cmfile, nowtok == expected_tok); + state = 91; + continue; + + case 91: + /* Waiting for WIDTH... */ + if (nowtok == tok_width_default) + { + state = 92; + continue; + } + + if (nowtok == tok_width) + { + lr_ignore_rest (cmfile, 1); + state = 93; + continue; + } + + if (nowtok == tok_width_variable) + { + lr_ignore_rest (cmfile, 1); + state = 98; + continue; + } + + lr_error (cmfile, _("\ +only WIDTH definitions are allowed to follow the CHARMAP definition")); + + lr_ignore_rest (cmfile, 0); + continue; + + case 92: + if (nowtok != tok_number) + lr_error (cmfile, _("value for %s must be an integer"), + "WIDTH_DEFAULT"); + else + result->width_default = now->val.num; + + lr_ignore_rest (cmfile, nowtok == tok_number); + + state = 91; + continue; + + case 93: + /* We now expect `END WIDTH' or lines of the format "%s %d\n" or + "%s...%s %d\n". */ + if (nowtok == tok_eol) + /* ignore empty lines. */ + continue; + + if (nowtok == tok_end) + { + expected_tok = tok_width; + expected_str = "WIDTH"; + state = 90; + continue; + } + + if (nowtok != tok_bsymbol) + { + lr_error (cmfile, _("syntax error in %s definition: %s"), + "WIDTH", _("no symbolic name given")); + + lr_ignore_rest (cmfile, 0); + continue; + } + + if (from_name != NULL) + obstack_free (&result->mem_pool, from_name); + + from_name = (char *) obstack_copy0 (&result->mem_pool, + now->val.str.start, + now->val.str.len); + to_name = NULL; + + state = 94; + continue; + + case 94: + if (nowtok == tok_ellipsis) + state = 95; + + case 96: + if (nowtok != tok_number) + lr_error (cmfile, _("value for %s must be an integer"), + "WIDTH"); + else + { + /* XXX Store width for chars. */ + from_name = NULL; + } + + lr_ignore_rest (cmfile, nowtok == tok_number); + + state = 93; + continue; + + case 95: + if (nowtok != tok_bsymbol) + { + lr_error (cmfile, _("syntax error in %s definition: %s"), + "WIDTH", _("no symbolic name given for end of range")); + + lr_ignore_rest (cmfile, 0); + + state = 93; + continue; + } + + to_name = (char *) obstack_copy0 (&result->mem_pool, + now->val.str.start, + now->val.str.len); + + lr_ignore_rest (cmfile, 1); + + state = 96; + continue; + + case 98: + /* We now expect `END WIDTH_VARIABLE' or lines of the format + "%s\n" or "%s...%s\n". */ + if (nowtok == tok_eol) + /* ignore empty lines. */ + continue; + + if (nowtok == tok_end) + { + expected_tok = tok_width_variable; + expected_str = "WIDTH_VARIABLE"; + state = 90; + continue; + } + + if (nowtok != tok_bsymbol) + { + lr_error (cmfile, _("syntax error in %s definition: %s"), + "WIDTH_VARIABLE", _("no symbolic name given")); + + lr_ignore_rest (cmfile, 0); + + continue; + } + + if (from_name != NULL) + obstack_free (&result->mem_pool, from_name); + + from_name = (char *) obstack_copy0 (&result->mem_pool, + now->val.str.start, + now->val.str.len); + to_name = NULL; + + state = 99; + continue; + + case 99: + if (nowtok == tok_ellipsis) + state = 100; + + /* Store info. */ + from_name = NULL; + + /* Warn */ + state = 98; + continue; + + case 100: + if (nowtok != tok_bsymbol) + lr_error (cmfile, _("syntax error in %s definition: %s"), + "WIDTH_VARIABLE", + _("no symbolic name given for end of range")); + else + { + to_name = (char *) obstack_copy0 (&result->mem_pool, + now->val.str.start, + now->val.str.len); + /* XXX Enter value into table. */ + } + + lr_ignore_rest (cmfile, nowtok == tok_bsymbol); + + state = 98; + continue; + + default: + error (5, 0, _("%s: error in state machine"), __FILE__); + /* NOTREACHED */ + } + break; + } + + if (state != 91) + error (0, 0, _("%s: premature end of file"), cmfile->fname); + + lr_close (cmfile); + + return result; +} |