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-rw-r--r--iconv/iconvconfig.c1165
1 files changed, 1165 insertions, 0 deletions
diff --git a/iconv/iconvconfig.c b/iconv/iconvconfig.c
new file mode 100644
index 0000000..05b3c9d
--- /dev/null
+++ b/iconv/iconvconfig.c
@@ -0,0 +1,1165 @@
+/* Generate fastloading iconv module configuration files.
+ Copyright (C) 2000, 2001 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2000.
+
+ 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. */
+
+#include <argp.h>
+#include <assert.h>
+#include <error.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <libintl.h>
+#include <locale.h>
+#include <mcheck.h>
+#include <search.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdio_ext.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/uio.h>
+
+#include "iconvconfig.h"
+
+/* Get libc version number. */
+#include "../version.h"
+
+#define PACKAGE _libc_intl_domainname
+
+
+/* The hashing function we use. */
+#include "../intl/hash-string.h"
+
+
+/* Types used. */
+struct module
+{
+ char *fromname;
+ struct Strent *fromname_strent;
+ char *filename;
+ struct Strent *filename_strent;
+ const char *directory;
+ struct Strent *directory_strent;
+ struct module *next;
+ int cost;
+ struct Strent *toname_strent;
+ char toname[0];
+};
+
+struct alias
+{
+ char *fromname;
+ struct Strent *froment;
+ struct module *module;
+ struct Strent *toent;
+ char toname[0];
+};
+
+struct name
+{
+ const char *name;
+ struct Strent *strent;
+ int module_idx;
+ uint32_t hashval;
+};
+
+struct name_info
+{
+ const char *canonical_name;
+ struct Strent *canonical_strent;
+
+ struct module *from_internal;
+ struct module *to_internal;
+
+ struct other_conv_list
+ {
+ int dest_idx;
+ struct other_conv
+ {
+ gidx_t module_idx;
+ struct module *module;
+ struct other_conv *next;
+ } other_conv;
+ struct other_conv_list *next;
+ } *other_conv_list;
+};
+
+
+/* Name and version of program. */
+static void print_version (FILE *stream, struct argp_state *state);
+void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
+
+#define OPT_VERBOSE 1000
+
+/* Definitions of arguments for argp functions. */
+static const struct argp_option options[] =
+{
+ { "verbose", OPT_VERBOSE, NULL, 0, N_("print progress information") },
+ { NULL, 0, NULL, 0, NULL }
+};
+
+/* Short description of program. */
+static const char doc[] = N_("\
+Create fastloading iconv module configuration file.");
+
+/* Strings for arguments in help texts. */
+static const char args_doc[] = N_("[DIR...]");
+
+/* Prototype for option handler. */
+static error_t parse_opt (int key, char *arg, struct argp_state *state);
+
+/* Function to print some extra text in the help message. */
+static char *more_help (int key, const char *text, void *input);
+
+/* Data structure to communicate with argp functions. */
+static struct argp argp =
+{
+ options, parse_opt, args_doc, doc, NULL, more_help
+};
+
+
+/* The function doing the actual work. */
+static int handle_dir (const char *dir);
+
+/* Add all known builtin conversions and aliases. */
+static void add_builtins (void);
+
+/* Create list of all aliases without circular aliases. */
+static void get_aliases (void);
+
+/* Create list of all modules. */
+static void get_modules (void);
+
+/* Get list of all the names and thereby indexing them. */
+static void generate_name_list (void);
+
+/* Collect information about all the names. */
+static void generate_name_info (void);
+
+/* Write the output file. */
+static int write_output (void);
+
+
+/* Nonzero if verbose ouput is wanted. */
+static int verbose;
+
+/* Search tree of the modules we know. */
+static void *modules;
+
+/* Search tree of the aliases we know. */
+static void *aliases;
+
+/* Search tree for name to index mapping. */
+static void *names;
+
+/* Number of names we know about. */
+static int nnames;
+
+/* List of all aliases. */
+static struct alias **alias_list;
+static size_t nalias_list;
+static size_t nalias_list_max;
+
+/* List of all modules. */
+static struct module **module_list;
+static size_t nmodule_list;
+static size_t nmodule_list_max;
+
+/* Names and information about them. */
+static struct name_info *name_info;
+static size_t nname_info;
+
+/* Number of translations not from or to INTERNAL. */
+static size_t nextra_modules;
+
+
+/* Names and aliases for the builtin transformations. */
+static struct
+{
+ const char *from;
+ const char *to;
+} builtin_alias[] =
+ {
+#define BUILTIN_ALIAS(alias, real) \
+ { .from = alias, .to = real },
+#define BUILTIN_TRANSFORMATION(From, To, Cost, Name, Fct, MinF, MaxF, \
+ MinT, MaxT)
+#include <gconv_builtin.h>
+ };
+#define nbuiltin_alias (sizeof (builtin_alias) / sizeof (builtin_alias[0]))
+
+static struct
+{
+ const char *from;
+ const char *to;
+ const char *module;
+ int cost;
+} builtin_trans[] =
+ {
+#define BUILTIN_ALIAS(alias, real)
+#define BUILTIN_TRANSFORMATION(From, To, Cost, Name, Fct, MinF, MaxF, \
+ MinT, MaxT) \
+ { .from = From, .to = To, .module = Name, .cost = Cost },
+#include <gconv_builtin.h>
+ };
+#define nbuiltin_trans (sizeof (builtin_trans) / sizeof (builtin_trans[0]))
+
+
+/* Filename extension for the modules. */
+#ifndef MODULE_EXT
+# define MODULE_EXT ".so"
+#endif
+static const char gconv_module_ext[] = MODULE_EXT;
+
+
+extern void *xmalloc (size_t n) __attribute__ ((__malloc__));
+extern void *xcalloc (size_t n, size_t m) __attribute__ ((__malloc__));
+extern void *xrealloc (void *p, size_t n);
+
+
+/* C string table handling. */
+struct Strtab;
+struct Strent;
+
+/* Create new C string table object in memory. */
+extern struct Strtab *strtabinit (void);
+
+/* Free resources allocated for C string table ST. */
+extern void strtabfree (struct Strtab *st);
+
+/* Add string STR (length LEN is != 0) to C string table ST. */
+extern struct Strent *strtabadd (struct Strtab *st, const char *str,
+ size_t len);
+
+/* Finalize string table ST and store size in *SIZE and return a pointer. */
+extern void *strtabfinalize (struct Strtab *st, size_t *size);
+
+/* Get offset in string table for string associated with SE. */
+extern size_t strtaboffset (struct Strent *se);
+
+/* String table we construct. */
+static struct Strtab *strtab;
+
+
+
+int
+main (int argc, char *argv[])
+{
+ int remaining;
+ int status = 0;
+ char *path;
+ char *tp;
+
+ /* Enable memory use testing. */
+ mcheck_pedantic (NULL);
+
+ /* Set locale via LC_ALL. */
+ setlocale (LC_ALL, "");
+
+ /* Set the text message domain. */
+ textdomain (_libc_intl_domainname);
+
+ /* Parse and process arguments. */
+ argp_parse (&argp, argc, argv, 0, &remaining, NULL);
+
+ /* Initialize the string table. */
+ strtab = strtabinit ();
+
+ /* Handle all directories mentioned. */
+ while (remaining < argc)
+ status |= handle_dir (argv[remaining++]);
+
+ /* In any case also handle the standard directory. */
+ path = strdupa (GCONV_PATH);
+ tp = strtok (path, ":");
+ while (tp != NULL)
+ {
+ status |= handle_dir (tp);
+
+ tp = strtok (NULL, ":");
+ }
+
+ /* Add the builtin transformations and aliases without overwriting
+ anything. */
+ add_builtins ();
+
+ /* Store aliases in an array. */
+ get_aliases ();
+
+ /* Get list of all modules. */
+ get_modules ();
+
+ /* Generate list of all the names we know to handle in some way. */
+ generate_name_list ();
+
+ /* Now we know all the names we will handle, collect information
+ about them. */
+ generate_name_info ();
+
+ /* Write the output file. */
+ status = write_output ();
+
+ return status;
+}
+
+
+/* Handle program arguments. */
+static error_t
+parse_opt (int key, char *arg, struct argp_state *state)
+{
+ switch (key)
+ {
+ case OPT_VERBOSE:
+ verbose = 1;
+ break;
+ default:
+ return ARGP_ERR_UNKNOWN;
+ }
+ return 0;
+}
+
+
+static char *
+more_help (int key, const char *text, void *input)
+{
+ switch (key)
+ {
+ case ARGP_KEY_HELP_EXTRA:
+ /* We print some extra information. */
+ return strdup (gettext ("\
+Report bugs using the `glibcbug' script to <bugs@gnu.org>.\n"));
+ default:
+ break;
+ }
+ return (char *) text;
+}
+
+
+/* Print the version information. */
+static void
+print_version (FILE *stream, struct argp_state *state)
+{
+ fprintf (stream, "iconvconfig (GNU %s) %s\n", PACKAGE, VERSION);
+ fprintf (stream, gettext ("\
+Copyright (C) %s Free Software Foundation, Inc.\n\
+This is free software; see the source for copying conditions. There is NO\n\
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
+"), "2001");
+ fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper");
+}
+
+
+static int
+alias_compare (const void *p1, const void *p2)
+{
+ const struct alias *a1 = (const struct alias *) p1;
+ const struct alias *a2 = (const struct alias *) p2;
+
+ return strcmp (a1->fromname, a2->fromname);
+}
+
+
+static void
+new_alias (const char *fromname, size_t fromlen, const char *toname,
+ size_t tolen)
+{
+ struct alias *newp;
+ void **inserted;
+
+ newp = (struct alias *) xmalloc (sizeof (struct alias) + fromlen + tolen);
+
+ newp->fromname = mempcpy (newp->toname, toname, tolen);
+ memcpy (newp->fromname, fromname, fromlen);
+ newp->module = NULL;
+
+ inserted = (void **) tsearch (newp, &aliases, alias_compare);
+ if (inserted == NULL)
+ error (EXIT_FAILURE, errno, gettext ("while inserting in search tree"));
+ if (*inserted != newp)
+ /* Something went wrong, free this entry. */
+ free (newp);
+ else
+ {
+ newp->froment = strtabadd (strtab, newp->fromname, fromlen);
+ newp->toent = strtabadd (strtab, newp->toname, tolen);
+ }
+}
+
+
+/* Add new alias. */
+static void
+add_alias (char *rp)
+{
+ /* We now expect two more string. The strings are normalized
+ (converted to UPPER case) and strored in the alias database. */
+ char *from;
+ char *to;
+ char *wp;
+
+ while (isspace (*rp))
+ ++rp;
+ from = wp = rp;
+ while (*rp != '\0' && !isspace (*rp))
+ *wp++ = toupper (*rp++);
+ if (*rp == '\0')
+ /* There is no `to' string on the line. Ignore it. */
+ return;
+ *wp++ = '\0';
+ to = ++rp;
+ while (isspace (*rp))
+ ++rp;
+ while (*rp != '\0' && !isspace (*rp))
+ *wp++ = toupper (*rp++);
+ if (to == wp)
+ /* No `to' string, ignore the line. */
+ return;
+ *wp++ = '\0';
+
+ new_alias (from, to - from, to, wp - to);
+}
+
+
+static void
+append_alias (const void *nodep, VISIT value, int level)
+{
+ if (value != leaf && value != postorder)
+ return;
+
+ if (nalias_list_max == nalias_list)
+ {
+ nalias_list_max += 50;
+ alias_list = (struct alias **) xrealloc (alias_list,
+ (nalias_list_max
+ * sizeof (struct alias *)));
+ }
+
+ alias_list[nalias_list++] = *(struct alias **) nodep;
+}
+
+
+static void
+get_aliases (void)
+{
+ twalk (aliases, append_alias);
+}
+
+
+static int
+module_compare (const void *p1, const void *p2)
+{
+ const struct module *m1 = (const struct module *) p1;
+ const struct module *m2 = (const struct module *) p2;
+ int result;
+
+ result = strcmp (m1->fromname, m2->fromname);
+ if (result == 0)
+ result = strcmp (m1->toname, m2->toname);
+
+ return result;
+}
+
+
+/* Create new module record. */
+static void
+new_module (const char *fromname, size_t fromlen, const char *toname,
+ size_t tolen, const char *directory,
+ const char *filename, size_t filelen, int cost, size_t need_ext)
+{
+ struct module *new_module;
+ size_t dirlen = strlen (directory) + 1;
+ char *tmp;
+ void **inserted;
+
+ new_module = (struct module *) xmalloc (sizeof (struct module)
+ + fromlen + tolen + filelen
+ + need_ext);
+
+ new_module->fromname = mempcpy (new_module->toname, toname, tolen);
+
+ new_module->filename = mempcpy (new_module->fromname, fromname, fromlen);
+
+ new_module->cost = cost;
+ new_module->next = NULL;
+
+ tmp = mempcpy (new_module->filename, filename, filelen);
+ if (need_ext)
+ {
+ memcpy (tmp - 1, gconv_module_ext, sizeof (gconv_module_ext));
+ filelen += sizeof (gconv_module_ext) - 1;
+ }
+ new_module->directory = directory;
+
+ /* Now insert the new module data structure in our search tree. */
+ inserted = (void **) tsearch (new_module, &modules, module_compare);
+ if (inserted == NULL)
+ error (EXIT_FAILURE, errno, "while inserting in search tree");
+ if (*inserted != new_module)
+ free (new_module);
+ else
+ {
+ new_module->fromname_strent = strtabadd (strtab, new_module->fromname,
+ fromlen);
+ new_module->toname_strent = strtabadd (strtab, new_module->toname,
+ tolen);
+ new_module->filename_strent = strtabadd (strtab, new_module->filename,
+ filelen);
+ new_module->directory_strent = strtabadd (strtab, directory, dirlen);
+ }
+}
+
+
+/* Add new module. */
+static void
+internal_function
+add_module (char *rp, const char *directory)
+{
+ /* We expect now
+ 1. `from' name
+ 2. `to' name
+ 3. filename of the module
+ 4. an optional cost value
+ */
+ char *from;
+ char *to;
+ char *module;
+ char *wp;
+ int need_ext;
+ int cost;
+
+ while (isspace (*rp))
+ ++rp;
+ from = rp;
+ while (*rp != '\0' && !isspace (*rp))
+ {
+ *rp = toupper (*rp);
+ ++rp;
+ }
+ if (*rp == '\0')
+ return;
+ *rp++ = '\0';
+ to = wp = rp;
+ while (isspace (*rp))
+ ++rp;
+ while (*rp != '\0' && !isspace (*rp))
+ *wp++ = toupper (*rp++);
+ if (*rp == '\0')
+ return;
+ *wp++ = '\0';
+ do
+ ++rp;
+ while (isspace (*rp));
+ module = wp;
+ while (*rp != '\0' && !isspace (*rp))
+ *wp++ = *rp++;
+ if (*rp == '\0')
+ {
+ /* There is no cost, use one by default. */
+ *wp++ = '\0';
+ cost = 1;
+ }
+ else
+ {
+ /* There might be a cost value. */
+ char *endp;
+
+ *wp++ = '\0';
+ cost = strtol (rp, &endp, 10);
+ if (rp == endp || cost < 1)
+ /* No useful information. */
+ cost = 1;
+ }
+
+ if (module[0] == '\0')
+ /* No module name given. */
+ return;
+
+ /* See whether we must add the ending. */
+ need_ext = 0;
+ if (wp - module < sizeof (gconv_module_ext)
+ || memcmp (wp - sizeof (gconv_module_ext), gconv_module_ext,
+ sizeof (gconv_module_ext)) != 0)
+ /* We must add the module extension. */
+ need_ext = sizeof (gconv_module_ext) - 1;
+
+ assert (strlen (from) + 1 == to - from);
+ assert (strlen (to) + 1 == module - to);
+ assert (strlen (module) + 1 == wp - module);
+
+ new_module (from, to - from, to, module - to, directory, module, wp - module,
+ cost, need_ext);
+}
+
+
+/* Read the config file and add the data for this directory to that. */
+static int
+handle_dir (const char *dir)
+{
+ char *infile;
+ FILE *fp;
+ char *line = NULL;
+ size_t linelen = 0;
+ size_t dirlen = strlen (dir);
+
+ if (dir[dirlen - 1] != '/')
+ {
+ char *newp = (char *) xmalloc (dirlen + 2);
+ dir = memcpy (newp, dir, dirlen);
+ newp[dirlen++] = '/';
+ newp[dirlen] = '\0';
+ }
+
+ infile = (char *) alloca (dirlen + sizeof "gconv-modules");
+ strcpy (mempcpy (infile, dir, dirlen), "gconv-modules");
+
+ fp = fopen (infile, "r");
+ if (fp == NULL)
+ {
+ error (0, errno, "cannot open `%s'", infile);
+ return 1;
+ }
+
+ /* No threads present. */
+ __fsetlocking (fp, FSETLOCKING_BYCALLER);
+
+ while (!feof_unlocked (fp))
+ {
+ char *rp, *endp, *word;
+ ssize_t n = __getdelim (&line, &linelen, '\n', fp);
+
+ if (n < 0)
+ /* An error occurred. */
+ break;
+
+ rp = line;
+ /* Terminate the line (excluding comments or newline) with a NUL
+ byte to simplify the following code. */
+ endp = strchr (rp, '#');
+ if (endp != NULL)
+ *endp = '\0';
+ else
+ if (rp[n - 1] == '\n')
+ rp[n - 1] = '\0';
+
+ while (isspace (*rp))
+ ++rp;
+
+ /* If this is an empty line go on with the next one. */
+ if (rp == endp)
+ continue;
+
+ word = rp;
+ while (*rp != '\0' && !isspace (*rp))
+ ++rp;
+
+ if (rp - word == sizeof ("alias") - 1
+ && memcmp (word, "alias", sizeof ("alias") - 1) == 0)
+ add_alias (rp);
+ else if (rp - word == sizeof ("module") - 1
+ && memcmp (word, "module", sizeof ("module") - 1) == 0)
+ add_module (rp, dir);
+ /* else */
+ /* Otherwise ignore the line. */
+ }
+
+ free (line);
+
+ fclose (fp);
+
+ return 0;
+}
+
+
+static void
+append_module (const void *nodep, VISIT value, int level)
+{
+ struct module *mo;
+
+ if (value != leaf && value != postorder)
+ return;
+
+ mo = *(struct module **) nodep;
+
+ if (nmodule_list > 0
+ && strcmp (module_list[nmodule_list - 1]->fromname, mo->fromname) == 0)
+ {
+ /* Same name. */
+ mo->next = module_list[nmodule_list - 1];
+ module_list[nmodule_list - 1] = mo;
+
+ return;
+ }
+
+ if (nmodule_list_max == nmodule_list)
+ {
+ nmodule_list_max += 50;
+ module_list = (struct module **) xrealloc (module_list,
+ (nmodule_list_max
+ * sizeof (struct module *)));
+ }
+
+ module_list[nmodule_list++] = mo;
+}
+
+
+static void
+get_modules (void)
+{
+ twalk (modules, append_module);
+}
+
+
+static void
+add_builtins (void)
+{
+ size_t cnt;
+
+ /* Add all aliases. */
+ for (cnt = 0; cnt < nbuiltin_alias; ++cnt)
+ new_alias (builtin_alias[cnt].from,
+ strlen (builtin_alias[cnt].from) + 1,
+ builtin_alias[cnt].to,
+ strlen (builtin_alias[cnt].to) + 1);
+
+ /* add the builtin transformations. */
+ for (cnt = 0; cnt < nbuiltin_trans; ++cnt)
+ new_module (builtin_trans[cnt].from,
+ strlen (builtin_trans[cnt].from) + 1,
+ builtin_trans[cnt].to,
+ strlen (builtin_trans[cnt].to) + 1,
+ "", builtin_trans[cnt].module,
+ strlen (builtin_trans[cnt].module) + 1,
+ builtin_trans[cnt].cost, 0);
+}
+
+
+static int
+name_compare (const void *p1, const void *p2)
+{
+ const struct name *n1 = (const struct name *) p1;
+ const struct name *n2 = (const struct name *) p2;
+
+ return strcmp (n1->name, n2->name);
+}
+
+
+static struct name *
+new_name (const char *str, struct Strent *strent)
+{
+ struct name *newp = (struct name *) xmalloc (sizeof (struct name));
+
+ newp->name = str;
+ newp->strent = strent;
+ newp->module_idx = -1;
+ newp->hashval = hash_string (str);
+
+ ++nnames;
+
+ return newp;
+}
+
+
+static void
+generate_name_list (void)
+{
+ size_t i;
+
+ for (i = 0; i < nmodule_list; ++i)
+ {
+ struct module *runp;
+
+ if (strcmp (module_list[i]->fromname, "INTERNAL") != 0)
+ tsearch (new_name (module_list[i]->fromname,
+ module_list[i]->fromname_strent),
+ &names, name_compare);
+
+ for (runp = module_list[i]; runp != NULL; runp = runp->next)
+ if (strcmp (runp->toname, "INTERNAL") != 0)
+ tsearch (new_name (runp->toname, runp->toname_strent),
+ &names, name_compare);
+ }
+}
+
+
+static int
+name_to_module_idx (const char *name, int add)
+{
+ struct name **res;
+ struct name fake_name = { .name = name };
+ int idx;
+
+ res = (struct name **) tfind (&fake_name, &names, name_compare);
+ if (res == NULL)
+ abort ();
+
+ idx = (*res)->module_idx;
+ if (idx == -1 && add)
+ /* No module index assigned yet. */
+ idx = (*res)->module_idx = nname_info++;
+
+ return idx;
+}
+
+
+static void
+generate_name_info (void)
+{
+ size_t i;
+
+ name_info = (struct name_info *) xcalloc (nmodule_list,
+ sizeof (struct name_info));
+
+ for (i = 0; i < nmodule_list; ++i)
+ {
+ struct module *runp;
+
+ for (runp = module_list[i]; runp != NULL; runp = runp->next)
+ if (strcmp (runp->fromname, "INTERNAL") == 0)
+ {
+ int idx = name_to_module_idx (runp->toname, 1);
+ name_info[idx].from_internal = runp;
+ assert (name_info[idx].canonical_name == NULL
+ || strcmp (name_info[idx].canonical_name,
+ runp->toname) == 0);
+ name_info[idx].canonical_name = runp->toname;
+ name_info[idx].canonical_strent = runp->toname_strent;
+ }
+ else if (strcmp (runp->toname, "INTERNAL") == 0)
+ {
+ int idx = name_to_module_idx (runp->fromname, 1);
+ name_info[idx].to_internal = runp;
+ assert (name_info[idx].canonical_name == NULL
+ || strcmp (name_info[idx].canonical_name,
+ runp->fromname) == 0);
+ name_info[idx].canonical_name = runp->fromname;
+ name_info[idx].canonical_strent = runp->fromname_strent;
+ }
+ else
+ {
+ /* This is a transformation not to or from the INTERNAL
+ encoding. */
+ int from_idx = name_to_module_idx (runp->fromname, 1);
+ int to_idx = name_to_module_idx (runp->toname, 1);
+ struct other_conv_list *newp;
+
+ newp = (struct other_conv_list *)
+ xmalloc (sizeof (struct other_conv_list));
+ newp->other_conv.module_idx = to_idx;
+ newp->other_conv.module = runp;
+ newp->other_conv.next = NULL; /* XXX Allow multiple module sequence */
+ newp->dest_idx = to_idx;
+ newp->next = name_info[from_idx].other_conv_list;
+ name_info[from_idx].other_conv_list = newp;
+ assert (name_info[from_idx].canonical_name == NULL
+ || strcmp (name_info[from_idx].canonical_name,
+ runp->fromname) == 0);
+ name_info[from_idx].canonical_name = runp->fromname;
+ name_info[from_idx].canonical_strent = runp->fromname_strent;
+
+ ++nextra_modules;
+ }
+ }
+
+ /* Now add the module index information for all the aliases. */
+ for (i = 0; i < nalias_list; ++i)
+ {
+ struct name fake_name = { .name = alias_list[i]->toname };
+ struct name **tonamep;
+
+ tonamep = (struct name **) tfind (&fake_name, &names, name_compare);
+ if (tonamep != NULL)
+ {
+ struct name *newp = new_name (alias_list[i]->fromname,
+ alias_list[i]->froment);
+ newp->module_idx = (*tonamep)->module_idx;
+ tsearch (newp, &names, name_compare);
+ }
+ }
+}
+
+
+static int
+is_prime (unsigned long int candidate)
+{
+ /* No even number and none less than 10 will be passed here. */
+ unsigned long int divn = 3;
+ unsigned long int sq = divn * divn;
+
+ while (sq < candidate && candidate % divn != 0)
+ {
+ ++divn;
+ sq += 4 * divn;
+ ++divn;
+ }
+
+ return candidate % divn != 0;
+}
+
+
+static uint32_t
+next_prime (uint32_t seed)
+{
+ /* Make it definitely odd. */
+ seed |= 1;
+
+ while (!is_prime (seed))
+ seed += 2;
+
+ return seed;
+}
+
+
+/* Format of the output file.
+
+ Offset Length Description
+ 0000 4 Magic header bytes
+ 0004 4 Offset of string table (stoff)
+ 0008 4 Offset of name hashing table (hoff)
+ 000C 4 Hashing table size (hsize)
+ 0010 4 Offset of module table (moff)
+ 0014 4 Offset of other conversion module table (ooff)
+
+ stoff ??? String table
+
+ hoff 8*hsize Array of tuples
+ string table offset
+ module index
+
+ moff ??? Array of tuples
+ canonical name offset
+ from-internal module dir name offset
+ from-internal module name off
+ to-internal module dir name offset
+ to-internal module name offset
+ offset into other conversion table
+
+ ooff ??? Sequence of words
+ name offset
+ one or more of tuple
+ canonical name offset
+ module dir name offset
+ module name offset
+ (following last entry canocical name offset is 0)
+*/
+static int
+write_output (void)
+{
+ int fd;
+ char *string_table;
+ size_t string_table_size;
+ struct gconvcache_header header;
+ struct hash_entry *hash_table;
+ size_t hash_size;
+ struct module_entry *module_table;
+ char *extra_table;
+ char *cur_extra_table;
+ size_t n;
+ int idx;
+ struct iovec iov[6];
+ static const gidx_t null_word;
+ size_t total;
+
+ /* Function to insert the names. */
+ void name_insert (const void *nodep, VISIT value, int level)
+ {
+ struct name *name;
+ unsigned int idx;
+ unsigned int hval2;
+
+ if (value != leaf && value != postorder)
+ return;
+
+ name = *(struct name **) nodep;
+ idx = name->hashval % hash_size;
+ hval2 = 1 + name->hashval % (hash_size - 2);
+
+ while (hash_table[idx].string_offset != 0)
+ if ((idx += hval2) >= hash_size)
+ idx -= hash_size;
+
+ hash_table[idx].string_offset = strtaboffset (name->strent);
+
+ assert (name->module_idx != -1);
+ hash_table[idx].module_idx = name->module_idx;
+ }
+
+ /* Open the output file. */
+ fd = open (GCONV_MODULES_CACHE, O_TRUNC | O_CREAT | O_RDWR, 0644);
+ if (fd == -1)
+ return 1;
+
+ /* Create the string table. */
+ string_table = strtabfinalize (strtab, &string_table_size);
+
+ /* Create the hashing table. We know how many strings we have.
+ Creating a perfect hash table is not reasonable here. Therefore
+ we use open hashing and a table size which is the next prime 40%
+ larger than the number of strings. */
+ hash_size = next_prime (nnames * 1.4);
+ hash_table = (struct hash_entry *) xcalloc (hash_size,
+ sizeof (struct hash_entry));
+ /* Fill the hash table. */
+ twalk (names, name_insert);
+
+ /* Create the section for the module list. */
+ module_table = (struct module_entry *) xcalloc (sizeof (struct module_entry),
+ nname_info);
+
+ /* Allocate memory for the non-INTERNAL conversions. The allocated
+ memory can be more than is actually needed. */
+ extra_table = (char *) xcalloc (sizeof (struct extra_entry)
+ + sizeof (gidx_t)
+ + sizeof (struct extra_entry_module),
+ nextra_modules);
+ cur_extra_table = extra_table;
+
+ /* Fill in the module information. */
+ for (n = 0; n < nname_info; ++n)
+ {
+ module_table[n].canonname_offset =
+ strtaboffset (name_info[n].canonical_strent);
+
+ if (name_info[n].from_internal == NULL)
+ {
+ module_table[n].fromdir_offset = 0;
+ module_table[n].fromname_offset = 0;
+ }
+ else
+ {
+ module_table[n].fromdir_offset =
+ strtaboffset (name_info[n].from_internal->directory_strent);
+ module_table[n].fromname_offset =
+ strtaboffset (name_info[n].from_internal->filename_strent);
+ }
+
+ if (name_info[n].to_internal == NULL)
+ {
+ module_table[n].todir_offset = 0;
+ module_table[n].toname_offset = 0;
+ }
+ else
+ {
+ module_table[n].todir_offset =
+ strtaboffset (name_info[n].to_internal->directory_strent);
+ module_table[n].toname_offset =
+ strtaboffset (name_info[n].to_internal->filename_strent);
+ }
+
+ if (name_info[n].other_conv_list != NULL)
+ {
+ struct other_conv_list *other = name_info[n].other_conv_list;
+
+ /* Store the reference. We add 1 to distinguish the entry
+ at offset zero from the case where no extra modules are
+ available. The file reader has to account for the
+ offset. */
+ module_table[n].extra_offset = 1 + cur_extra_table - extra_table;
+
+ do
+ {
+ struct other_conv *runp;
+ struct extra_entry *extra;
+
+ /* Allocate new entry. */
+ extra = (struct extra_entry *) cur_extra_table;
+ cur_extra_table += sizeof (struct extra_entry);
+ extra->module_cnt = 0;
+
+ runp = &other->other_conv;
+ do
+ {
+ cur_extra_table += sizeof (struct extra_entry_module);
+ extra->module[extra->module_cnt].outname_offset =
+ runp->next == NULL
+ ? other->dest_idx : runp->next->module_idx;
+ extra->module[extra->module_cnt].dir_offset =
+ strtaboffset (runp->module->directory_strent);
+ extra->module[extra->module_cnt].name_offset =
+ strtaboffset (runp->module->filename_strent);
+ ++extra->module_cnt;
+
+ runp = runp->next;
+ }
+ while (runp != NULL);
+
+ other = other->next;
+ }
+ while (other != NULL);
+
+ /* Final module_cnt is zero. */
+ *((gidx_t *) cur_extra_table) = 0;
+ cur_extra_table += sizeof (gidx_t);
+ }
+ }
+
+ header.magic = GCONVCACHE_MAGIC;
+
+ iov[0].iov_base = &header;
+ iov[0].iov_len = sizeof (struct gconvcache_header);
+ total = iov[0].iov_len;
+
+ header.string_offset = total;
+ iov[1].iov_base = string_table;
+ iov[1].iov_len = string_table_size;
+ total += iov[1].iov_len;
+
+ idx = 2;
+ if ((string_table_size & (sizeof (gidx_t) - 1)) != 0)
+ {
+ iov[2].iov_base = (void *) &null_word;
+ iov[2].iov_len = (sizeof (gidx_t)
+ - (string_table_size & (sizeof (gidx_t) - 1)));
+ total += iov[2].iov_len;
+ ++idx;
+ }
+
+ header.hash_offset = total;
+ header.hash_size = hash_size;
+ iov[idx].iov_base = hash_table;
+ iov[idx].iov_len = hash_size * sizeof (struct hash_entry);
+ total += iov[idx].iov_len;
+ ++idx;
+
+ header.module_offset = total;
+ iov[idx].iov_base = module_table;
+ iov[idx].iov_len = nname_info * sizeof (struct module_entry);
+ total += iov[idx].iov_len;
+ ++idx;
+
+ assert (cur_extra_table - extra_table
+ <= ((sizeof (struct extra_entry) + sizeof (gidx_t)
+ + sizeof (struct extra_entry_module))
+ * nextra_modules));
+ header.otherconv_offset = total;
+ iov[idx].iov_base = extra_table;
+ iov[idx].iov_len = cur_extra_table - extra_table;
+ total += iov[idx].iov_len;
+ ++idx;
+
+ if (TEMP_FAILURE_RETRY (writev (fd, iov, idx)) != total)
+ {
+ int save_errno = errno;
+ close (fd);
+ unlink (GCONV_MODULES_CACHE);
+ error (EXIT_FAILURE, save_errno, gettext ("cannot write output file"));
+ }
+
+ close (fd);
+
+ return 0;
+}