Minor portability improvements.

[cdecl99.git] / src / error.c

diff --git a/src/error.c b/src/error.c
index e18ec80091e03539986e687a54dc2ab827975055..093f56c5c58e134800998fce8ad05c3e28dfabe3 100644 (file)
--- a/src/error.c
+++ b/src/error.c
@@ -1,12 +1,31 @@
+/*
+ *  Error handling for libcdecl.
+ *  Copyright © 2011-2012, 2021 Nick Bowler
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include <config.h>
 #include <stdlib.h>
 #include <string.h>
 #include <assert.h>
+
 #include <glthread/lock.h>
 #include <glthread/tls.h>
+
 #include "cdecl.h"
-#include "error.h"
-#include "i18n.h"
+#include "cdecl-internal.h"
 
 gl_once_define(static, tls_initialized);
 static gl_tls_key_t tls_key;
@@ -14,58 +33,42 @@ static gl_tls_key_t tls_key;
 struct err_state {
        struct cdecl_error err;
        size_t nstr;
-       char str[];
+       char str[FLEXIBLE_ARRAY_MEMBER];
 };
 
 /* This error is reserved for extremely dire out-of-memory conditions. */
 static struct err_state err_no_mem = {
        .err = {
                .code = CDECL_ENOMEM,
-               .str  = "failed to allocate memory",
+               .str  = NULL,
        },
 };
 
-static void free_err(void *err)
-{
-       if (err == &err_no_mem)
-               return;
-
-       free(err);
-}
-
-static void initialize(void)
+const char *cdecl__strerror(unsigned code)
 {
-       cdecl__init_i18n();
-       err_no_mem.err.str = gettext(err_no_mem.err.str);
+#include "errtab.h"
 
-       gl_tls_key_init(tls_key, free_err);
+       switch (code) {
+       case CDECL_ENOMEM: return gettext(strtab+err_enomem);
+       case CDECL_ENOPARSE: return gettext(strtab+err_enoparse);
+       }
 
-       /*
-        * This default error message is a stop-gap measure until all library
-        * error conditions use the new interface.
-        */
-       cdecl__set_error(&(const struct cdecl_error){ .code = CDECL_ENOPARSE });
+       assert(0);
 }
 
-const struct cdecl_error *cdecl_get_error(void)
+static void free_err(void *err)
 {
-       struct err_state *state;
-
-       gl_once(tls_initialized, initialize);
-
-       state = gl_tls_get(tls_key);
-       assert(state);
+       if (err == &err_no_mem)
+               return;
 
-       return &state->err;
+       free(err);
 }
 
-void cdecl__set_error(const struct cdecl_error *err)
+static void set_error(const struct cdecl_error *err)
 {
        struct err_state *state;
        size_t need_len = 0;
 
-       gl_once(tls_initialized, initialize);
-
        if (err->str) {
                need_len = strlen(err->str) + 1;
        }
@@ -98,6 +101,39 @@ void cdecl__set_error(const struct cdecl_error *err)
                memcpy(state->str, err->str, need_len);
                state->err.str = state->str;
        } else {
-               state->err.str = "unknown error";
+               state->err.str = cdecl__strerror(state->err.code);
        }
 }
+
+static void initialize(void)
+{
+       cdecl__init_i18n();
+       err_no_mem.err.str = cdecl__strerror(CDECL_ENOMEM);
+
+       gl_tls_key_init(tls_key, free_err);
+
+       /*
+        * This default error message is a stop-gap measure until all library
+        * error conditions use the new interface.
+        */
+       set_error(&(const struct cdecl_error){ .code = CDECL_ENOPARSE });
+}
+
+const struct cdecl_error *cdecl_get_error(void)
+{
+       struct err_state *state;
+
+       gl_once(tls_initialized, initialize);
+
+       state = gl_tls_get(tls_key);
+       assert(state);
+
+       return &state->err;
+}
+
+void cdecl__set_error(const struct cdecl_error *err)
+{
+       gl_once(tls_initialized, initialize);
+
+       set_error(err);
+}