1 /* Generate fastloading iconv module configuration files.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@redhat.com>, 2000.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
32 #include <stdio_ext.h>
36 #include <sys/cdefs.h>
39 #include "iconvconfig.h"
41 /* Get libc version number. */
42 #include "../version.h"
44 #define PACKAGE _libc_intl_domainname
47 /* The hashing function we use. */
48 #include "../intl/hash-string.h"
55 struct Strent *fromname_strent;
57 struct Strent *filename_strent;
58 const char *directory;
59 struct Strent *directory_strent;
62 struct Strent *toname_strent;
69 struct Strent *froment;
70 struct module *module;
78 struct Strent *strent;
85 const char *canonical_name;
86 struct Strent *canonical_strent;
88 struct module *from_internal;
89 struct module *to_internal;
91 struct other_conv_list
97 struct module *module;
98 struct other_conv *next;
100 struct other_conv_list *next;
105 /* Name and version of program. */
106 static void print_version (FILE *stream, struct argp_state *state);
107 void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
109 /* Short description of program. */
110 static const char doc[] = N_("\
111 Create fastloading iconv module configuration file.");
113 /* Strings for arguments in help texts. */
114 static const char args_doc[] = N_("[DIR...]");
116 /* Prototype for option handler. */
117 static error_t parse_opt (int key, char *arg, struct argp_state *state);
119 /* Function to print some extra text in the help message. */
120 static char *more_help (int key, const char *text, void *input);
122 /* Definitions of arguments for argp functions. */
123 #define OPT_PREFIX 300
124 static const struct argp_option options[] =
126 { "prefix", OPT_PREFIX, "PATH", 0, N_("Prefix used for all file accesses") },
127 { NULL, 0, NULL, 0, NULL }
130 /* Data structure to communicate with argp functions. */
131 static struct argp argp =
134 options, parse_opt, args_doc, doc, NULL, more_help
138 /* The function doing the actual work. */
139 static int handle_dir (const char *dir);
141 /* Add all known builtin conversions and aliases. */
142 static void add_builtins (void);
144 /* Create list of all aliases without circular aliases. */
145 static void get_aliases (void);
147 /* Create list of all modules. */
148 static void get_modules (void);
150 /* Get list of all the names and thereby indexing them. */
151 static void generate_name_list (void);
153 /* Collect information about all the names. */
154 static void generate_name_info (void);
156 /* Write the output file. */
157 static int write_output (void);
160 /* Prefix to be used for all file accesses. */
161 static const char *prefix = "";
163 static size_t prefix_len;
165 /* Search tree of the modules we know. */
166 static void *modules;
168 /* Search tree of the aliases we know. */
169 static void *aliases;
171 /* Search tree for name to index mapping. */
174 /* Number of names we know about. */
177 /* List of all aliases. */
178 static struct alias **alias_list;
179 static size_t nalias_list;
180 static size_t nalias_list_max;
182 /* List of all modules. */
183 static struct module **module_list;
184 static size_t nmodule_list;
185 static size_t nmodule_list_max;
187 /* Names and information about them. */
188 static struct name_info *name_info;
189 static size_t nname_info;
191 /* Number of translations not from or to INTERNAL. */
192 static size_t nextra_modules;
195 /* Names and aliases for the builtin transformations. */
202 #define BUILTIN_ALIAS(alias, real) \
203 { .from = alias, .to = real },
204 #define BUILTIN_TRANSFORMATION(From, To, Cost, Name, Fct, BtowcFct, \
205 MinF, MaxF, MinT, MaxT)
206 #include <gconv_builtin.h>
209 #undef BUILTIN_TRANSFORMATION
210 #define nbuiltin_alias (sizeof (builtin_alias) / sizeof (builtin_alias[0]))
220 #define BUILTIN_ALIAS(alias, real)
221 #define BUILTIN_TRANSFORMATION(From, To, Cost, Name, Fct, BtowcFct, \
222 MinF, MaxF, MinT, MaxT) \
223 { .from = From, .to = To, .module = Name, .cost = Cost },
224 #include <gconv_builtin.h>
227 #undef BUILTIN_TRANSFORMATION
228 #define nbuiltin_trans (sizeof (builtin_trans) / sizeof (builtin_trans[0]))
231 /* Filename extension for the modules. */
233 # define MODULE_EXT ".so"
235 static const char gconv_module_ext[] = MODULE_EXT;
238 extern void *xmalloc (size_t n) __attribute_malloc__;
239 extern void *xcalloc (size_t n, size_t m) __attribute_malloc__;
240 extern void *xrealloc (void *p, size_t n);
243 /* C string table handling. */
247 /* Create new C string table object in memory. */
248 extern struct Strtab *strtabinit (void);
250 /* Free resources allocated for C string table ST. */
251 extern void strtabfree (struct Strtab *st);
253 /* Add string STR (length LEN is != 0) to C string table ST. */
254 extern struct Strent *strtabadd (struct Strtab *st, const char *str,
257 /* Finalize string table ST and store size in *SIZE and return a pointer. */
258 extern void *strtabfinalize (struct Strtab *st, size_t *size);
260 /* Get offset in string table for string associated with SE. */
261 extern size_t strtaboffset (struct Strent *se);
263 /* String table we construct. */
264 static struct Strtab *strtab;
269 main (int argc, char *argv[])
276 /* Enable memory use testing. */
277 /* mcheck_pedantic (NULL); */
280 /* Set locale via LC_ALL. */
281 setlocale (LC_ALL, "");
283 /* Set the text message domain. */
284 textdomain (_libc_intl_domainname);
286 /* Parse and process arguments. */
287 argp_parse (&argp, argc, argv, 0, &remaining, NULL);
289 /* Initialize the string table. */
290 strtab = strtabinit ();
292 /* Handle all directories mentioned. */
293 while (remaining < argc)
294 status |= handle_dir (argv[remaining++]);
296 /* In any case also handle the standard directory. */
297 path = strdupa (GCONV_PATH);
298 tp = strtok (path, ":");
301 status |= handle_dir (tp);
303 tp = strtok (NULL, ":");
306 /* Add the builtin transformations and aliases without overwriting
310 /* Store aliases in an array. */
313 /* Get list of all modules. */
316 /* Generate list of all the names we know to handle in some way. */
317 generate_name_list ();
319 /* Now we know all the names we will handle, collect information
321 generate_name_info ();
323 /* Write the output file, but only if we haven't seen any error. */
325 status = write_output ();
327 error (1, 0, _("no output file produced because warning were issued"));
333 /* Handle program arguments. */
335 parse_opt (int key, char *arg, struct argp_state *state)
341 prefix_len = strlen (prefix);
344 return ARGP_ERR_UNKNOWN;
351 more_help (int key, const char *text, void *input)
355 case ARGP_KEY_HELP_EXTRA:
356 /* We print some extra information. */
357 return strdup (gettext ("\
358 Report bugs using the `glibcbug' script to <bugs@gnu.org>.\n"));
362 return (char *) text;
366 /* Print the version information. */
368 print_version (FILE *stream, struct argp_state *state)
370 fprintf (stream, "iconvconfig (GNU %s) %s\n", PACKAGE, VERSION);
371 fprintf (stream, gettext ("\
372 Copyright (C) %s Free Software Foundation, Inc.\n\
373 This is free software; see the source for copying conditions. There is NO\n\
374 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
376 fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper");
381 alias_compare (const void *p1, const void *p2)
383 const struct alias *a1 = (const struct alias *) p1;
384 const struct alias *a2 = (const struct alias *) p2;
386 return strcmp (a1->fromname, a2->fromname);
391 new_alias (const char *fromname, size_t fromlen, const char *toname,
397 newp = (struct alias *) xmalloc (sizeof (struct alias) + fromlen + tolen);
399 newp->fromname = mempcpy (newp->toname, toname, tolen);
400 memcpy (newp->fromname, fromname, fromlen);
403 inserted = (void **) tsearch (newp, &aliases, alias_compare);
404 if (inserted == NULL)
405 error (EXIT_FAILURE, errno, gettext ("while inserting in search tree"));
406 if (*inserted != newp)
407 /* Something went wrong, free this entry. */
411 newp->froment = strtabadd (strtab, newp->fromname, fromlen);
412 newp->toent = strtabadd (strtab, newp->toname, tolen);
421 /* We now expect two more string. The strings are normalized
422 (converted to UPPER case) and strored in the alias database. */
427 while (isspace (*rp))
430 while (*rp != '\0' && !isspace (*rp))
431 *wp++ = toupper (*rp++);
433 /* There is no `to' string on the line. Ignore it. */
437 while (isspace (*rp))
439 while (*rp != '\0' && !isspace (*rp))
440 *wp++ = toupper (*rp++);
442 /* No `to' string, ignore the line. */
446 assert (strlen (from) + 1 == (size_t) (to - from));
447 assert (strlen (to) + 1 == (size_t) (wp - to));
449 new_alias (from, to - from, to, wp - to);
454 append_alias (const void *nodep, VISIT value, int level)
456 if (value != leaf && value != postorder)
459 if (nalias_list_max == nalias_list)
461 nalias_list_max += 50;
462 alias_list = (struct alias **) xrealloc (alias_list,
464 * sizeof (struct alias *)));
467 alias_list[nalias_list++] = *(struct alias **) nodep;
474 twalk (aliases, append_alias);
479 module_compare (const void *p1, const void *p2)
481 const struct module *m1 = (const struct module *) p1;
482 const struct module *m2 = (const struct module *) p2;
485 result = strcmp (m1->fromname, m2->fromname);
487 result = strcmp (m1->toname, m2->toname);
493 /* Create new module record. */
495 new_module (const char *fromname, size_t fromlen, const char *toname,
496 size_t tolen, const char *directory,
497 const char *filename, size_t filelen, int cost, size_t need_ext)
499 struct module *new_module;
500 size_t dirlen = strlen (directory) + 1;
504 new_module = (struct module *) xmalloc (sizeof (struct module)
505 + fromlen + tolen + filelen
508 new_module->fromname = mempcpy (new_module->toname, toname, tolen);
510 new_module->filename = mempcpy (new_module->fromname, fromname, fromlen);
512 new_module->cost = cost;
513 new_module->next = NULL;
515 tmp = mempcpy (new_module->filename, filename, filelen);
518 memcpy (tmp - 1, gconv_module_ext, need_ext + 1);
521 new_module->directory = directory;
523 /* Now insert the new module data structure in our search tree. */
524 inserted = (void **) tsearch (new_module, &modules, module_compare);
525 if (inserted == NULL)
526 error (EXIT_FAILURE, errno, "while inserting in search tree");
527 if (*inserted != new_module)
531 new_module->fromname_strent = strtabadd (strtab, new_module->fromname,
533 new_module->toname_strent = strtabadd (strtab, new_module->toname,
535 new_module->filename_strent = strtabadd (strtab, new_module->filename,
537 new_module->directory_strent = strtabadd (strtab, directory, dirlen);
542 /* Add new module. */
545 add_module (char *rp, const char *directory)
550 3. filename of the module
551 4. an optional cost value
560 while (isspace (*rp))
563 while (*rp != '\0' && !isspace (*rp))
572 while (isspace (*rp))
574 while (*rp != '\0' && !isspace (*rp))
575 *wp++ = toupper (*rp++);
581 while (isspace (*rp));
583 while (*rp != '\0' && !isspace (*rp))
587 /* There is no cost, use one by default. */
593 /* There might be a cost value. */
597 cost = strtol (rp, &endp, 10);
598 if (rp == endp || cost < 1)
599 /* No useful information. */
603 if (module[0] == '\0')
604 /* No module name given. */
607 /* See whether we must add the ending. */
609 if ((size_t) (wp - module) < sizeof (gconv_module_ext)
610 || memcmp (wp - sizeof (gconv_module_ext), gconv_module_ext,
611 sizeof (gconv_module_ext)) != 0)
612 /* We must add the module extension. */
613 need_ext = sizeof (gconv_module_ext) - 1;
615 assert (strlen (from) + 1 == (size_t) (to - from));
616 assert (strlen (to) + 1 == (size_t) (module - to));
617 assert (strlen (module) + 1 == (size_t) (wp - module));
619 new_module (from, to - from, to, module - to, directory, module, wp - module,
624 /* Read the config file and add the data for this directory to that. */
626 handle_dir (const char *dir)
633 size_t dirlen = strlen (dir);
635 if (dir[dirlen - 1] != '/')
637 char *newp = (char *) xmalloc (dirlen + 2);
638 dir = memcpy (newp, dir, dirlen);
639 newp[dirlen++] = '/';
643 cp = infile = (char *) alloca (prefix_len + dirlen + sizeof "gconv-modules");
645 cp = mempcpy (cp, prefix, prefix_len);
646 strcpy (mempcpy (cp, dir, dirlen), "gconv-modules");
648 fp = fopen (infile, "r");
651 error (0, errno, "cannot open `%s'", infile);
655 /* No threads present. */
656 __fsetlocking (fp, FSETLOCKING_BYCALLER);
658 while (!feof_unlocked (fp))
660 char *rp, *endp, *word;
661 ssize_t n = __getdelim (&line, &linelen, '\n', fp);
664 /* An error occurred. */
668 /* Terminate the line (excluding comments or newline) with a NUL
669 byte to simplify the following code. */
670 endp = strchr (rp, '#');
674 if (rp[n - 1] == '\n')
677 while (isspace (*rp))
680 /* If this is an empty line go on with the next one. */
685 while (*rp != '\0' && !isspace (*rp))
688 if (rp - word == sizeof ("alias") - 1
689 && memcmp (word, "alias", sizeof ("alias") - 1) == 0)
691 else if (rp - word == sizeof ("module") - 1
692 && memcmp (word, "module", sizeof ("module") - 1) == 0)
693 add_module (rp, dir);
695 /* Otherwise ignore the line. */
707 append_module (const void *nodep, VISIT value, int level)
711 if (value != leaf && value != postorder)
714 mo = *(struct module **) nodep;
717 && strcmp (module_list[nmodule_list - 1]->fromname, mo->fromname) == 0)
720 mo->next = module_list[nmodule_list - 1];
721 module_list[nmodule_list - 1] = mo;
726 if (nmodule_list_max == nmodule_list)
728 nmodule_list_max += 50;
729 module_list = (struct module **) xrealloc (module_list,
731 * sizeof (struct module *)));
734 module_list[nmodule_list++] = mo;
741 twalk (modules, append_module);
750 /* Add all aliases. */
751 for (cnt = 0; cnt < nbuiltin_alias; ++cnt)
752 new_alias (builtin_alias[cnt].from,
753 strlen (builtin_alias[cnt].from) + 1,
754 builtin_alias[cnt].to,
755 strlen (builtin_alias[cnt].to) + 1);
757 /* add the builtin transformations. */
758 for (cnt = 0; cnt < nbuiltin_trans; ++cnt)
759 new_module (builtin_trans[cnt].from,
760 strlen (builtin_trans[cnt].from) + 1,
761 builtin_trans[cnt].to,
762 strlen (builtin_trans[cnt].to) + 1,
763 "", builtin_trans[cnt].module,
764 strlen (builtin_trans[cnt].module) + 1,
765 builtin_trans[cnt].cost, 0);
770 name_compare (const void *p1, const void *p2)
772 const struct name *n1 = (const struct name *) p1;
773 const struct name *n2 = (const struct name *) p2;
775 return strcmp (n1->name, n2->name);
780 new_name (const char *str, struct Strent *strent)
782 struct name *newp = (struct name *) xmalloc (sizeof (struct name));
785 newp->strent = strent;
786 newp->module_idx = -1;
787 newp->hashval = __hash_string (str);
796 generate_name_list (void)
800 /* A name we always need. */
801 tsearch (new_name ("INTERNAL", strtabadd (strtab, "INTERNAL",
802 sizeof ("INTERNAL"))),
803 &names, name_compare);
805 for (i = 0; i < nmodule_list; ++i)
809 if (strcmp (module_list[i]->fromname, "INTERNAL") != 0)
810 tsearch (new_name (module_list[i]->fromname,
811 module_list[i]->fromname_strent),
812 &names, name_compare);
814 for (runp = module_list[i]; runp != NULL; runp = runp->next)
815 if (strcmp (runp->toname, "INTERNAL") != 0)
816 tsearch (new_name (runp->toname, runp->toname_strent),
817 &names, name_compare);
823 name_to_module_idx (const char *name, int add)
826 struct name fake_name = { .name = name };
829 res = (struct name **) tfind (&fake_name, &names, name_compare);
833 idx = (*res)->module_idx;
834 if (idx == -1 && add)
835 /* No module index assigned yet. */
836 idx = (*res)->module_idx = nname_info++;
843 generate_name_info (void)
848 name_info = (struct name_info *) xcalloc (nmodule_list + 1,
849 sizeof (struct name_info));
851 /* First add a special entry for the INTERNAL name. This must have
853 idx = name_to_module_idx ("INTERNAL", 1);
854 name_info[0].canonical_name = "INTERNAL";
855 name_info[0].canonical_strent = strtabadd (strtab, "INTERNAL",
856 sizeof ("INTERNAL"));
857 assert (nname_info == 1);
859 for (i = 0; i < nmodule_list; ++i)
863 for (runp = module_list[i]; runp != NULL; runp = runp->next)
864 if (strcmp (runp->fromname, "INTERNAL") == 0)
866 idx = name_to_module_idx (runp->toname, 1);
867 name_info[idx].from_internal = runp;
868 assert (name_info[idx].canonical_name == NULL
869 || strcmp (name_info[idx].canonical_name,
871 name_info[idx].canonical_name = runp->toname;
872 name_info[idx].canonical_strent = runp->toname_strent;
874 else if (strcmp (runp->toname, "INTERNAL") == 0)
876 idx = name_to_module_idx (runp->fromname, 1);
877 name_info[idx].to_internal = runp;
878 assert (name_info[idx].canonical_name == NULL
879 || strcmp (name_info[idx].canonical_name,
880 runp->fromname) == 0);
881 name_info[idx].canonical_name = runp->fromname;
882 name_info[idx].canonical_strent = runp->fromname_strent;
886 /* This is a transformation not to or from the INTERNAL
888 int from_idx = name_to_module_idx (runp->fromname, 1);
889 int to_idx = name_to_module_idx (runp->toname, 1);
890 struct other_conv_list *newp;
892 newp = (struct other_conv_list *)
893 xmalloc (sizeof (struct other_conv_list));
894 newp->other_conv.module_idx = to_idx;
895 newp->other_conv.module = runp;
896 newp->other_conv.next = NULL; /* XXX Allow multiple module sequence */
897 newp->dest_idx = to_idx;
898 newp->next = name_info[from_idx].other_conv_list;
899 name_info[from_idx].other_conv_list = newp;
900 assert (name_info[from_idx].canonical_name == NULL
901 || strcmp (name_info[from_idx].canonical_name,
902 runp->fromname) == 0);
903 name_info[from_idx].canonical_name = runp->fromname;
904 name_info[from_idx].canonical_strent = runp->fromname_strent;
910 /* Now add the module index information for all the aliases. */
911 for (i = 0; i < nalias_list; ++i)
913 struct name fake_name = { .name = alias_list[i]->toname };
914 struct name **tonamep;
916 tonamep = (struct name **) tfind (&fake_name, &names, name_compare);
919 struct name *newp = new_name (alias_list[i]->fromname,
920 alias_list[i]->froment);
921 newp->module_idx = (*tonamep)->module_idx;
922 tsearch (newp, &names, name_compare);
929 is_prime (unsigned long int candidate)
931 /* No even number and none less than 10 will be passed here. */
932 unsigned long int divn = 3;
933 unsigned long int sq = divn * divn;
935 while (sq < candidate && candidate % divn != 0)
942 return candidate % divn != 0;
947 next_prime (uint32_t seed)
949 /* Make it definitely odd. */
952 while (!is_prime (seed))
959 /* Format of the output file.
961 Offset Length Description
962 0000 4 Magic header bytes
963 0004 4 Offset of string table (stoff)
964 0008 4 Offset of name hashing table (hoff)
965 000C 4 Hashing table size (hsize)
966 0010 4 Offset of module table (moff)
967 0014 4 Offset of other conversion module table (ooff)
969 stoff ??? String table
971 hoff 8*hsize Array of tuples
975 moff ??? Array of tuples
976 canonical name offset
977 from-internal module dir name offset
978 from-internal module name off
979 to-internal module dir name offset
980 to-internal module name offset
981 offset into other conversion table
983 ooff ??? One or more of
984 number of steps/modules
986 canonical name offset for output
987 module dir name offset
989 (following last entry with step count 0)
996 size_t string_table_size;
997 struct gconvcache_header header;
998 struct hash_entry *hash_table;
1000 struct module_entry *module_table;
1002 char *cur_extra_table;
1005 struct iovec iov[6];
1006 static const gidx_t null_word;
1008 char tmpfname[prefix_len + sizeof (GCONV_MODULES_CACHE)
1009 + strlen (".XXXXXX")];
1010 char finalname[prefix_len + sizeof (GCONV_MODULES_CACHE)];
1012 /* Function to insert the names. */
1013 static void name_insert (const void *nodep, VISIT value, int level)
1019 if (value != leaf && value != postorder)
1022 name = *(struct name **) nodep;
1023 idx = name->hashval % hash_size;
1024 hval2 = 1 + name->hashval % (hash_size - 2);
1026 while (hash_table[idx].string_offset != 0)
1027 if ((idx += hval2) >= hash_size)
1030 hash_table[idx].string_offset = strtaboffset (name->strent);
1032 assert (name->module_idx != -1);
1033 hash_table[idx].module_idx = name->module_idx;
1036 /* Open the output file. */
1037 assert (GCONV_MODULES_CACHE[0] == '/');
1038 strcpy (stpcpy (mempcpy (tmpfname, prefix, prefix_len), GCONV_MODULES_CACHE),
1040 fd = mkstemp (tmpfname);
1044 strcpy (mempcpy (finalname, prefix, prefix_len), GCONV_MODULES_CACHE);
1046 /* Create the string table. */
1047 string_table = strtabfinalize (strtab, &string_table_size);
1049 /* Create the hashing table. We know how many strings we have.
1050 Creating a perfect hash table is not reasonable here. Therefore
1051 we use open hashing and a table size which is the next prime 40%
1052 larger than the number of strings. */
1053 hash_size = next_prime (nnames * 1.4);
1054 hash_table = (struct hash_entry *) xcalloc (hash_size,
1055 sizeof (struct hash_entry));
1056 /* Fill the hash table. */
1057 twalk (names, name_insert);
1059 /* Create the section for the module list. */
1060 module_table = (struct module_entry *) xcalloc (sizeof (struct module_entry),
1063 /* Allocate memory for the non-INTERNAL conversions. The allocated
1064 memory can be more than is actually needed. */
1065 extra_table = (char *) xcalloc (sizeof (struct extra_entry)
1067 + sizeof (struct extra_entry_module),
1069 cur_extra_table = extra_table;
1071 /* Fill in the module information. */
1072 for (n = 0; n < nname_info; ++n)
1074 module_table[n].canonname_offset =
1075 strtaboffset (name_info[n].canonical_strent);
1077 if (name_info[n].from_internal == NULL)
1079 module_table[n].fromdir_offset = 0;
1080 module_table[n].fromname_offset = 0;
1084 module_table[n].fromdir_offset =
1085 strtaboffset (name_info[n].from_internal->directory_strent);
1086 module_table[n].fromname_offset =
1087 strtaboffset (name_info[n].from_internal->filename_strent);
1090 if (name_info[n].to_internal == NULL)
1092 module_table[n].todir_offset = 0;
1093 module_table[n].toname_offset = 0;
1097 module_table[n].todir_offset =
1098 strtaboffset (name_info[n].to_internal->directory_strent);
1099 module_table[n].toname_offset =
1100 strtaboffset (name_info[n].to_internal->filename_strent);
1103 if (name_info[n].other_conv_list != NULL)
1105 struct other_conv_list *other = name_info[n].other_conv_list;
1107 /* Store the reference. We add 1 to distinguish the entry
1108 at offset zero from the case where no extra modules are
1109 available. The file reader has to account for the
1111 module_table[n].extra_offset = 1 + cur_extra_table - extra_table;
1115 struct other_conv *runp;
1116 struct extra_entry *extra;
1118 /* Allocate new entry. */
1119 extra = (struct extra_entry *) cur_extra_table;
1120 cur_extra_table += sizeof (struct extra_entry);
1121 extra->module_cnt = 0;
1123 runp = &other->other_conv;
1126 cur_extra_table += sizeof (struct extra_entry_module);
1127 extra->module[extra->module_cnt].outname_offset =
1129 ? other->dest_idx : runp->next->module_idx;
1130 extra->module[extra->module_cnt].dir_offset =
1131 strtaboffset (runp->module->directory_strent);
1132 extra->module[extra->module_cnt].name_offset =
1133 strtaboffset (runp->module->filename_strent);
1134 ++extra->module_cnt;
1138 while (runp != NULL);
1140 other = other->next;
1142 while (other != NULL);
1144 /* Final module_cnt is zero. */
1145 *((gidx_t *) cur_extra_table) = 0;
1146 cur_extra_table += sizeof (gidx_t);
1150 header.magic = GCONVCACHE_MAGIC;
1152 iov[0].iov_base = &header;
1153 iov[0].iov_len = sizeof (struct gconvcache_header);
1154 total = iov[0].iov_len;
1156 header.string_offset = total;
1157 iov[1].iov_base = string_table;
1158 iov[1].iov_len = string_table_size;
1159 total += iov[1].iov_len;
1162 if ((string_table_size & (sizeof (gidx_t) - 1)) != 0)
1164 iov[2].iov_base = (void *) &null_word;
1165 iov[2].iov_len = (sizeof (gidx_t)
1166 - (string_table_size & (sizeof (gidx_t) - 1)));
1167 total += iov[2].iov_len;
1171 header.hash_offset = total;
1172 header.hash_size = hash_size;
1173 iov[idx].iov_base = hash_table;
1174 iov[idx].iov_len = hash_size * sizeof (struct hash_entry);
1175 total += iov[idx].iov_len;
1178 header.module_offset = total;
1179 iov[idx].iov_base = module_table;
1180 iov[idx].iov_len = nname_info * sizeof (struct module_entry);
1181 total += iov[idx].iov_len;
1184 assert ((size_t) (cur_extra_table - extra_table)
1185 <= ((sizeof (struct extra_entry) + sizeof (gidx_t)
1186 + sizeof (struct extra_entry_module))
1188 header.otherconv_offset = total;
1189 iov[idx].iov_base = extra_table;
1190 iov[idx].iov_len = cur_extra_table - extra_table;
1191 total += iov[idx].iov_len;
1194 if ((size_t) TEMP_FAILURE_RETRY (writev (fd, iov, idx)) != total
1195 /* The file was created with mode 0600. Make it world-readable. */
1196 || fchmod (fd, 0644) != 0
1197 /* Rename the file, possibly replacing an old one. */
1198 || rename (tmpfname, finalname) != 0)
1200 int save_errno = errno;
1203 error (EXIT_FAILURE, save_errno,
1204 gettext ("cannot generate output file"));