+Sun Sep 10 12:37:40 2000 Owen Taylor <otaylor@redhat.com>
+
+ * glib.h gconvert.c (g_convert): Havoc Pennington's implementation
+ of convenient character set conversion using iconv, with
+ the addition of GError. We probably need a fallback that
+ just does conversions between, say UTF-8,16,32 and ISO-8859-1
+ for targets without iconv at all.
+
+ Also add g_convert_with_fallback() to take care of conversions
+ where we accept some loss going to the target encoding.
+
2000-09-10 Havoc Pennington <hp@redhat.com>
* gutf8.c (g_utf8_validate): Add this function.
+Sun Sep 10 12:37:40 2000 Owen Taylor <otaylor@redhat.com>
+
+ * glib.h gconvert.c (g_convert): Havoc Pennington's implementation
+ of convenient character set conversion using iconv, with
+ the addition of GError. We probably need a fallback that
+ just does conversions between, say UTF-8,16,32 and ISO-8859-1
+ for targets without iconv at all.
+
+ Also add g_convert_with_fallback() to take care of conversions
+ where we accept some loss going to the target encoding.
+
2000-09-10 Havoc Pennington <hp@redhat.com>
* gutf8.c (g_utf8_validate): Add this function.
+Sun Sep 10 12:37:40 2000 Owen Taylor <otaylor@redhat.com>
+
+ * glib.h gconvert.c (g_convert): Havoc Pennington's implementation
+ of convenient character set conversion using iconv, with
+ the addition of GError. We probably need a fallback that
+ just does conversions between, say UTF-8,16,32 and ISO-8859-1
+ for targets without iconv at all.
+
+ Also add g_convert_with_fallback() to take care of conversions
+ where we accept some loss going to the target encoding.
+
2000-09-10 Havoc Pennington <hp@redhat.com>
* gutf8.c (g_utf8_validate): Add this function.
+Sun Sep 10 12:37:40 2000 Owen Taylor <otaylor@redhat.com>
+
+ * glib.h gconvert.c (g_convert): Havoc Pennington's implementation
+ of convenient character set conversion using iconv, with
+ the addition of GError. We probably need a fallback that
+ just does conversions between, say UTF-8,16,32 and ISO-8859-1
+ for targets without iconv at all.
+
+ Also add g_convert_with_fallback() to take care of conversions
+ where we accept some loss going to the target encoding.
+
2000-09-10 Havoc Pennington <hp@redhat.com>
* gutf8.c (g_utf8_validate): Add this function.
+Sun Sep 10 12:37:40 2000 Owen Taylor <otaylor@redhat.com>
+
+ * glib.h gconvert.c (g_convert): Havoc Pennington's implementation
+ of convenient character set conversion using iconv, with
+ the addition of GError. We probably need a fallback that
+ just does conversions between, say UTF-8,16,32 and ISO-8859-1
+ for targets without iconv at all.
+
+ Also add g_convert_with_fallback() to take care of conversions
+ where we accept some loss going to the target encoding.
+
2000-09-10 Havoc Pennington <hp@redhat.com>
* gutf8.c (g_utf8_validate): Add this function.
+Sun Sep 10 12:37:40 2000 Owen Taylor <otaylor@redhat.com>
+
+ * glib.h gconvert.c (g_convert): Havoc Pennington's implementation
+ of convenient character set conversion using iconv, with
+ the addition of GError. We probably need a fallback that
+ just does conversions between, say UTF-8,16,32 and ISO-8859-1
+ for targets without iconv at all.
+
+ Also add g_convert_with_fallback() to take care of conversions
+ where we accept some loss going to the target encoding.
+
2000-09-10 Havoc Pennington <hp@redhat.com>
* gutf8.c (g_utf8_validate): Add this function.
+Sun Sep 10 12:37:40 2000 Owen Taylor <otaylor@redhat.com>
+
+ * glib.h gconvert.c (g_convert): Havoc Pennington's implementation
+ of convenient character set conversion using iconv, with
+ the addition of GError. We probably need a fallback that
+ just does conversions between, say UTF-8,16,32 and ISO-8859-1
+ for targets without iconv at all.
+
+ Also add g_convert_with_fallback() to take care of conversions
+ where we accept some loss going to the target encoding.
+
2000-09-10 Havoc Pennington <hp@redhat.com>
* gutf8.c (g_utf8_validate): Add this function.
+Sun Sep 10 12:37:40 2000 Owen Taylor <otaylor@redhat.com>
+
+ * glib.h gconvert.c (g_convert): Havoc Pennington's implementation
+ of convenient character set conversion using iconv, with
+ the addition of GError. We probably need a fallback that
+ just does conversions between, say UTF-8,16,32 and ISO-8859-1
+ for targets without iconv at all.
+
+ Also add g_convert_with_fallback() to take care of conversions
+ where we accept some loss going to the target encoding.
+
2000-09-10 Havoc Pennington <hp@redhat.com>
* gutf8.c (g_utf8_validate): Add this function.
gbacktrace.c \
gcache.c \
gcompletion.c \
+ gconvert.c \
gdataset.c \
gdate.c \
gerror.c \
--- /dev/null
+/* GLIB - Library of useful routines for C programming
+ *
+ * gconvert.c: Convert between character sets using iconv
+ * Copyright Red Hat Inc., 2000
+ * Authors: Havoc Pennington <hp@redhat.com>, Owen Taylor <otaylor@redhat.com
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <iconv.h>
+#include <errno.h>
+#include <string.h>
+
+#include "glib.h"
+
+GQuark
+g_convert_error_quark()
+{
+ static GQuark quark;
+ if (!quark)
+ quark = g_quark_from_static_string ("g_convert_error");
+ return quark;
+}
+
+static iconv_t
+open_converter (const gchar *to_codeset,
+ const gchar *from_codeset,
+ GError **error)
+{
+ iconv_t cd = iconv_open (to_codeset, from_codeset);
+
+ if (cd == (iconv_t) -1)
+ {
+ /* Something went wrong. */
+ if (errno == EINVAL)
+ g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_NO_CONVERSION,
+ "Conversion from character set `%s' to `%s' is not supported",
+ from_codeset, to_codeset);
+ else
+ g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_OTHER,
+ "Could not open converter from `%s' to `%s': %s",
+ from_codeset, to_codeset, strerror (errno));
+ }
+
+ return cd;
+
+}
+
+/**
+ * g_convert:
+ * @str: the string to convert
+ * @len: the length of the string
+ * @to_codeset: name of character set into which to convert @str
+ * @from_codeset: character set of @str.
+ * @bytes_read: location to store the number of bytes in the
+ * input string that were successfully converted, or %NULL.
+ * Even if the conversion was succesful, this may be
+ * less than len if there were partial characters
+ * at the end of the input. If the error
+ * G_CONVERT_ERROR_ILLEGAL_SEQUENCE occurs, the value
+ * stored will the byte fofset after the last valid
+ * input sequence.
+ * @error: location to store the error occuring, or %NULL to ignore
+ * errors. Any of the errors in #GConvertError may occur.
+ *
+ * Convert a string from one character set to another.
+ *
+ * Return value: If the conversion was successful, a newly allocated
+ * NUL-terminated string, which must be freed with
+ * g_free. Otherwise %NULL and @error will be set.
+ **/
+gchar*
+g_convert (const gchar *str,
+ gint len,
+ const gchar *to_codeset,
+ const gchar *from_codeset,
+ gint *bytes_read,
+ gint *bytes_written,
+ GError **error)
+{
+ gchar *dest;
+ gchar *outp;
+ const gchar *p;
+ size_t inbytes_remaining;
+ size_t outbytes_remaining;
+ size_t err;
+ iconv_t cd;
+ size_t outbuf_size;
+ gboolean have_error = FALSE;
+
+ g_return_val_if_fail (str != NULL, NULL);
+ g_return_val_if_fail (to_codeset != NULL, NULL);
+ g_return_val_if_fail (from_codeset != NULL, NULL);
+
+ cd = open_converter (to_codeset, from_codeset, error);
+
+ if (cd == (iconv_t) -1)
+ {
+ if (bytes_read)
+ *bytes_read = 0;
+
+ if (bytes_written)
+ *bytes_written = 0;
+
+ return NULL;
+ }
+
+ if (len < 0)
+ len = strlen (str);
+
+ p = str;
+ inbytes_remaining = len;
+ outbuf_size = len + 1; /* + 1 for nul in case len == 1 */
+ outbytes_remaining = outbuf_size - 1; /* -1 for nul */
+ outp = dest = g_malloc (outbuf_size);
+
+ again:
+
+ err = iconv (cd, &p, &inbytes_remaining, &outp, &outbytes_remaining);
+
+ if (err == (size_t) -1)
+ {
+ switch (errno)
+ {
+ case EINVAL:
+ /* Incomplete text, do not report an error */
+ break;
+ case E2BIG:
+ {
+ size_t used = outp - dest;
+ outbuf_size *= 2;
+ dest = g_realloc (dest, outbuf_size);
+
+ outp = dest + used;
+ outbytes_remaining = outbuf_size - used - 1; /* -1 for nul */
+
+ goto again;
+ }
+ case EILSEQ:
+ g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ "Invalid byte sequence in conversion input");
+ have_error = TRUE;
+ break;
+ default:
+ g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_OTHER,
+ "Error during conversion: %s",
+ strerror (errno));
+ have_error = TRUE;
+ break;
+ }
+ }
+
+ *outp = '\0';
+
+ iconv_close (cd);
+
+ if (bytes_read)
+ *bytes_read = p - str;
+
+ if (bytes_written)
+ *bytes_written = outp - dest; /* Doesn't include '\0' */
+
+ if (have_error)
+ {
+ g_free (dest);
+ return NULL;
+ }
+ else
+ return dest;
+}
+
+/**
+ * g_convert_with_fallback:
+ * @str: the string to convert
+ * @len: the length of the string
+ * @to_codeset: name of character set into which to convert @str
+ * @from_codeset: character set of @str.
+ * @fallback: UTF-8 string to use in place of character not
+ * present in the target encoding. (This must be
+ * in the target encoding), if %NULL, characters
+ * not in the target encoding will be represented
+ * as Unicode escapes \x{XXXX} or \x{XXXXXX}.
+ * @bytes_read: location to store the number of bytes in the
+ * input string that were successfully converted, or %NULL.
+ * Even if the conversion was succesful, this may be
+ * less than len if there were partial characters
+ * at the end of the input. If the error
+ * G_CONVERT_ERROR_ILLEGAL_SEQUENCE occurs, the value
+ * stored will the byte fofset after the last valid
+ * input sequence.
+ * @error: location to store the error occuring, or %NULL to ignore
+ * errors. Any of the errors in #GConvertError may occur.
+ *
+ * Convert a string from one character set to another, possibly
+ * including fallback sequences for characters not representable
+ * in the output. Note that it is not guaranteed that the specification
+ * for the fallback sequences in @fallback will be honored. Some
+ * systems may do a approximate conversion from @from_codeset
+ * to @to_codeset in their iconv() functions, in which case GLib
+ * will simply return that approximate conversion.
+ *
+ * Return value: If the conversion was successful, a newly allocated
+ * NUL-terminated string, which must be freed with
+ * g_free. Otherwise %NULL and @error will be set.
+ **/
+gchar*
+g_convert_with_fallback (const gchar *str,
+ gint len,
+ const gchar *to_codeset,
+ const gchar *from_codeset,
+ gchar *fallback,
+ gint *bytes_read,
+ gint *bytes_written,
+ GError **error)
+{
+ gchar *utf8;
+ gchar *dest;
+ gchar *outp;
+ const gchar *insert_str = NULL;
+ const gchar *p;
+ size_t inbytes_remaining;
+ const gchar *save_p = NULL;
+ size_t save_inbytes = 0;
+ size_t outbytes_remaining;
+ size_t err;
+ iconv_t cd;
+ size_t outbuf_size;
+ gboolean have_error = FALSE;
+ gboolean done = FALSE;
+
+ GError *local_error = NULL;
+
+ g_return_val_if_fail (str != NULL, NULL);
+ g_return_val_if_fail (to_codeset != NULL, NULL);
+ g_return_val_if_fail (from_codeset != NULL, NULL);
+
+ if (len < 0)
+ len = strlen (str);
+
+ /* Try an exact conversion; we only proceed if this fails
+ * due to an illegal sequence in the input string.
+ */
+ dest = g_convert (str, len, to_codeset, from_codeset,
+ bytes_read, bytes_written, &local_error);
+ if (!local_error)
+ return dest;
+
+ if (!g_error_matches (local_error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE))
+ {
+ g_propagate_error (error, local_error);
+ return NULL;
+ }
+ else
+ g_error_free (local_error);
+
+ /* No go; to proceed, we need a converter from "UTF-8" to
+ * to_codeset, and the string as UTF-8.
+ */
+ cd = open_converter (to_codeset, "UTF-8", error);
+ if (cd == (iconv_t) -1)
+ {
+ if (bytes_read)
+ *bytes_read = 0;
+
+ if (bytes_written)
+ *bytes_written = 0;
+
+ return NULL;
+ }
+
+ utf8 = g_convert (str, len, "UTF-8", from_codeset,
+ bytes_read, &inbytes_remaining, error);
+ if (!utf8)
+ return NULL;
+
+ /* Now the heart of the code. We loop through the UTF-8 string, and
+ * whenever we hit an offending character, we form fallback, convert
+ * the fallback to the target codeset, and then go back to
+ * converting the original string after finishing with the fallback.
+ *
+ * The variables save_p and save_inbytes store the input state
+ * for the original string while we are converting the fallback
+ */
+ p = utf8;
+ outbuf_size = len + 1; /* + 1 for nul in case len == 1 */
+ outbytes_remaining = outbuf_size - 1; /* -1 for nul */
+ outp = dest = g_malloc (outbuf_size);
+
+ while (!done && !have_error)
+ {
+ err = iconv (cd, &p, &inbytes_remaining, &outp, &outbytes_remaining);
+
+ if (err == (size_t) -1)
+ {
+ switch (errno)
+ {
+ case EINVAL:
+ g_assert_not_reached();
+ break;
+ case E2BIG:
+ {
+ size_t used = outp - dest;
+ outbuf_size *= 2;
+ dest = g_realloc (dest, outbuf_size);
+
+ outp = dest + used;
+ outbytes_remaining = outbuf_size - used - 1; /* -1 for nul */
+
+ break;
+ }
+ case EILSEQ:
+ if (save_p)
+ {
+ /* Error converting fallback string - fatal
+ */
+ g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ "Cannot convert fallback '%s' to codeset '%s'",
+ insert_str, to_codeset);
+ have_error = TRUE;
+ break;
+ }
+ else
+ {
+ if (!fallback)
+ {
+ gunichar ch = g_utf8_get_char (p);
+ insert_str = g_strdup_printf ("\\x{%0*X}",
+ (ch < 0x10000) ? 4 : 6,
+ ch);
+ }
+ else
+ insert_str = fallback;
+
+ save_p = g_utf8_next_char (p);
+ save_inbytes = inbytes_remaining - (save_p - p);
+ p = insert_str;
+ inbytes_remaining = strlen (p);
+ }
+ break;
+ default:
+ g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_OTHER,
+ "Error during conversion: %s",
+ strerror (errno));
+ have_error = TRUE;
+ break;
+ }
+ }
+ else
+ {
+ if (save_p)
+ {
+ if (!fallback)
+ g_free ((gchar *)insert_str);
+ p = save_p;
+ inbytes_remaining = save_inbytes;
+ save_p = NULL;
+ }
+ else
+ done = TRUE;
+ }
+ }
+
+ /* Cleanup
+ */
+ *outp = '\0';
+
+ iconv_close (cd);
+
+ if (bytes_written)
+ *bytes_written = outp - str; /* Doesn't include '\0' */
+
+ g_free (utf8);
+
+ if (have_error)
+ {
+ if (save_p && !fallback)
+ g_free ((gchar *)insert_str);
+ g_free (dest);
+ return NULL;
+ }
+ else
+ return dest;
+}
/* Stop all currently unused threads, but leave the limit untouched */
void g_thread_pool_stop_unused_threads (void);
+typedef enum
+{
+ G_CONVERT_ERROR_NO_CONVERSION,
+ G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ G_CONVERT_ERROR_OTHER
+} GConvertError;
+
+#define G_CONVERT_ERROR g_convert_error_quark()
+GQuark g_convert_error_quark();
+
+gchar* g_convert (const gchar *str,
+ gint len,
+ const gchar *to_codeset,
+ const gchar *from_codeset,
+ gint *bytes_read,
+ gint *bytes_written,
+ GError **error);
+gchar* g_convert_with_fallback (const gchar *str,
+ gint len,
+ const gchar *to_codeset,
+ const gchar *from_codeset,
+ gchar *fallback,
+ gint *bytes_read,
+ gint *bytes_written,
+ GError **error);
+
#ifdef __cplusplus
}
#endif /* __cplusplus */
gbacktrace.c \
gcache.c \
gcompletion.c \
+ gconvert.c \
gdataset.c \
gdate.c \
gerror.c \
--- /dev/null
+/* GLIB - Library of useful routines for C programming
+ *
+ * gconvert.c: Convert between character sets using iconv
+ * Copyright Red Hat Inc., 2000
+ * Authors: Havoc Pennington <hp@redhat.com>, Owen Taylor <otaylor@redhat.com
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <iconv.h>
+#include <errno.h>
+#include <string.h>
+
+#include "glib.h"
+
+GQuark
+g_convert_error_quark()
+{
+ static GQuark quark;
+ if (!quark)
+ quark = g_quark_from_static_string ("g_convert_error");
+ return quark;
+}
+
+static iconv_t
+open_converter (const gchar *to_codeset,
+ const gchar *from_codeset,
+ GError **error)
+{
+ iconv_t cd = iconv_open (to_codeset, from_codeset);
+
+ if (cd == (iconv_t) -1)
+ {
+ /* Something went wrong. */
+ if (errno == EINVAL)
+ g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_NO_CONVERSION,
+ "Conversion from character set `%s' to `%s' is not supported",
+ from_codeset, to_codeset);
+ else
+ g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_OTHER,
+ "Could not open converter from `%s' to `%s': %s",
+ from_codeset, to_codeset, strerror (errno));
+ }
+
+ return cd;
+
+}
+
+/**
+ * g_convert:
+ * @str: the string to convert
+ * @len: the length of the string
+ * @to_codeset: name of character set into which to convert @str
+ * @from_codeset: character set of @str.
+ * @bytes_read: location to store the number of bytes in the
+ * input string that were successfully converted, or %NULL.
+ * Even if the conversion was succesful, this may be
+ * less than len if there were partial characters
+ * at the end of the input. If the error
+ * G_CONVERT_ERROR_ILLEGAL_SEQUENCE occurs, the value
+ * stored will the byte fofset after the last valid
+ * input sequence.
+ * @error: location to store the error occuring, or %NULL to ignore
+ * errors. Any of the errors in #GConvertError may occur.
+ *
+ * Convert a string from one character set to another.
+ *
+ * Return value: If the conversion was successful, a newly allocated
+ * NUL-terminated string, which must be freed with
+ * g_free. Otherwise %NULL and @error will be set.
+ **/
+gchar*
+g_convert (const gchar *str,
+ gint len,
+ const gchar *to_codeset,
+ const gchar *from_codeset,
+ gint *bytes_read,
+ gint *bytes_written,
+ GError **error)
+{
+ gchar *dest;
+ gchar *outp;
+ const gchar *p;
+ size_t inbytes_remaining;
+ size_t outbytes_remaining;
+ size_t err;
+ iconv_t cd;
+ size_t outbuf_size;
+ gboolean have_error = FALSE;
+
+ g_return_val_if_fail (str != NULL, NULL);
+ g_return_val_if_fail (to_codeset != NULL, NULL);
+ g_return_val_if_fail (from_codeset != NULL, NULL);
+
+ cd = open_converter (to_codeset, from_codeset, error);
+
+ if (cd == (iconv_t) -1)
+ {
+ if (bytes_read)
+ *bytes_read = 0;
+
+ if (bytes_written)
+ *bytes_written = 0;
+
+ return NULL;
+ }
+
+ if (len < 0)
+ len = strlen (str);
+
+ p = str;
+ inbytes_remaining = len;
+ outbuf_size = len + 1; /* + 1 for nul in case len == 1 */
+ outbytes_remaining = outbuf_size - 1; /* -1 for nul */
+ outp = dest = g_malloc (outbuf_size);
+
+ again:
+
+ err = iconv (cd, &p, &inbytes_remaining, &outp, &outbytes_remaining);
+
+ if (err == (size_t) -1)
+ {
+ switch (errno)
+ {
+ case EINVAL:
+ /* Incomplete text, do not report an error */
+ break;
+ case E2BIG:
+ {
+ size_t used = outp - dest;
+ outbuf_size *= 2;
+ dest = g_realloc (dest, outbuf_size);
+
+ outp = dest + used;
+ outbytes_remaining = outbuf_size - used - 1; /* -1 for nul */
+
+ goto again;
+ }
+ case EILSEQ:
+ g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ "Invalid byte sequence in conversion input");
+ have_error = TRUE;
+ break;
+ default:
+ g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_OTHER,
+ "Error during conversion: %s",
+ strerror (errno));
+ have_error = TRUE;
+ break;
+ }
+ }
+
+ *outp = '\0';
+
+ iconv_close (cd);
+
+ if (bytes_read)
+ *bytes_read = p - str;
+
+ if (bytes_written)
+ *bytes_written = outp - dest; /* Doesn't include '\0' */
+
+ if (have_error)
+ {
+ g_free (dest);
+ return NULL;
+ }
+ else
+ return dest;
+}
+
+/**
+ * g_convert_with_fallback:
+ * @str: the string to convert
+ * @len: the length of the string
+ * @to_codeset: name of character set into which to convert @str
+ * @from_codeset: character set of @str.
+ * @fallback: UTF-8 string to use in place of character not
+ * present in the target encoding. (This must be
+ * in the target encoding), if %NULL, characters
+ * not in the target encoding will be represented
+ * as Unicode escapes \x{XXXX} or \x{XXXXXX}.
+ * @bytes_read: location to store the number of bytes in the
+ * input string that were successfully converted, or %NULL.
+ * Even if the conversion was succesful, this may be
+ * less than len if there were partial characters
+ * at the end of the input. If the error
+ * G_CONVERT_ERROR_ILLEGAL_SEQUENCE occurs, the value
+ * stored will the byte fofset after the last valid
+ * input sequence.
+ * @error: location to store the error occuring, or %NULL to ignore
+ * errors. Any of the errors in #GConvertError may occur.
+ *
+ * Convert a string from one character set to another, possibly
+ * including fallback sequences for characters not representable
+ * in the output. Note that it is not guaranteed that the specification
+ * for the fallback sequences in @fallback will be honored. Some
+ * systems may do a approximate conversion from @from_codeset
+ * to @to_codeset in their iconv() functions, in which case GLib
+ * will simply return that approximate conversion.
+ *
+ * Return value: If the conversion was successful, a newly allocated
+ * NUL-terminated string, which must be freed with
+ * g_free. Otherwise %NULL and @error will be set.
+ **/
+gchar*
+g_convert_with_fallback (const gchar *str,
+ gint len,
+ const gchar *to_codeset,
+ const gchar *from_codeset,
+ gchar *fallback,
+ gint *bytes_read,
+ gint *bytes_written,
+ GError **error)
+{
+ gchar *utf8;
+ gchar *dest;
+ gchar *outp;
+ const gchar *insert_str = NULL;
+ const gchar *p;
+ size_t inbytes_remaining;
+ const gchar *save_p = NULL;
+ size_t save_inbytes = 0;
+ size_t outbytes_remaining;
+ size_t err;
+ iconv_t cd;
+ size_t outbuf_size;
+ gboolean have_error = FALSE;
+ gboolean done = FALSE;
+
+ GError *local_error = NULL;
+
+ g_return_val_if_fail (str != NULL, NULL);
+ g_return_val_if_fail (to_codeset != NULL, NULL);
+ g_return_val_if_fail (from_codeset != NULL, NULL);
+
+ if (len < 0)
+ len = strlen (str);
+
+ /* Try an exact conversion; we only proceed if this fails
+ * due to an illegal sequence in the input string.
+ */
+ dest = g_convert (str, len, to_codeset, from_codeset,
+ bytes_read, bytes_written, &local_error);
+ if (!local_error)
+ return dest;
+
+ if (!g_error_matches (local_error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE))
+ {
+ g_propagate_error (error, local_error);
+ return NULL;
+ }
+ else
+ g_error_free (local_error);
+
+ /* No go; to proceed, we need a converter from "UTF-8" to
+ * to_codeset, and the string as UTF-8.
+ */
+ cd = open_converter (to_codeset, "UTF-8", error);
+ if (cd == (iconv_t) -1)
+ {
+ if (bytes_read)
+ *bytes_read = 0;
+
+ if (bytes_written)
+ *bytes_written = 0;
+
+ return NULL;
+ }
+
+ utf8 = g_convert (str, len, "UTF-8", from_codeset,
+ bytes_read, &inbytes_remaining, error);
+ if (!utf8)
+ return NULL;
+
+ /* Now the heart of the code. We loop through the UTF-8 string, and
+ * whenever we hit an offending character, we form fallback, convert
+ * the fallback to the target codeset, and then go back to
+ * converting the original string after finishing with the fallback.
+ *
+ * The variables save_p and save_inbytes store the input state
+ * for the original string while we are converting the fallback
+ */
+ p = utf8;
+ outbuf_size = len + 1; /* + 1 for nul in case len == 1 */
+ outbytes_remaining = outbuf_size - 1; /* -1 for nul */
+ outp = dest = g_malloc (outbuf_size);
+
+ while (!done && !have_error)
+ {
+ err = iconv (cd, &p, &inbytes_remaining, &outp, &outbytes_remaining);
+
+ if (err == (size_t) -1)
+ {
+ switch (errno)
+ {
+ case EINVAL:
+ g_assert_not_reached();
+ break;
+ case E2BIG:
+ {
+ size_t used = outp - dest;
+ outbuf_size *= 2;
+ dest = g_realloc (dest, outbuf_size);
+
+ outp = dest + used;
+ outbytes_remaining = outbuf_size - used - 1; /* -1 for nul */
+
+ break;
+ }
+ case EILSEQ:
+ if (save_p)
+ {
+ /* Error converting fallback string - fatal
+ */
+ g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ "Cannot convert fallback '%s' to codeset '%s'",
+ insert_str, to_codeset);
+ have_error = TRUE;
+ break;
+ }
+ else
+ {
+ if (!fallback)
+ {
+ gunichar ch = g_utf8_get_char (p);
+ insert_str = g_strdup_printf ("\\x{%0*X}",
+ (ch < 0x10000) ? 4 : 6,
+ ch);
+ }
+ else
+ insert_str = fallback;
+
+ save_p = g_utf8_next_char (p);
+ save_inbytes = inbytes_remaining - (save_p - p);
+ p = insert_str;
+ inbytes_remaining = strlen (p);
+ }
+ break;
+ default:
+ g_set_error (error, G_CONVERT_ERROR, G_CONVERT_ERROR_OTHER,
+ "Error during conversion: %s",
+ strerror (errno));
+ have_error = TRUE;
+ break;
+ }
+ }
+ else
+ {
+ if (save_p)
+ {
+ if (!fallback)
+ g_free ((gchar *)insert_str);
+ p = save_p;
+ inbytes_remaining = save_inbytes;
+ save_p = NULL;
+ }
+ else
+ done = TRUE;
+ }
+ }
+
+ /* Cleanup
+ */
+ *outp = '\0';
+
+ iconv_close (cd);
+
+ if (bytes_written)
+ *bytes_written = outp - str; /* Doesn't include '\0' */
+
+ g_free (utf8);
+
+ if (have_error)
+ {
+ if (save_p && !fallback)
+ g_free ((gchar *)insert_str);
+ g_free (dest);
+ return NULL;
+ }
+ else
+ return dest;
+}
/* Stop all currently unused threads, but leave the limit untouched */
void g_thread_pool_stop_unused_threads (void);
+typedef enum
+{
+ G_CONVERT_ERROR_NO_CONVERSION,
+ G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
+ G_CONVERT_ERROR_OTHER
+} GConvertError;
+
+#define G_CONVERT_ERROR g_convert_error_quark()
+GQuark g_convert_error_quark();
+
+gchar* g_convert (const gchar *str,
+ gint len,
+ const gchar *to_codeset,
+ const gchar *from_codeset,
+ gint *bytes_read,
+ gint *bytes_written,
+ GError **error);
+gchar* g_convert_with_fallback (const gchar *str,
+ gint len,
+ const gchar *to_codeset,
+ const gchar *from_codeset,
+ gchar *fallback,
+ gint *bytes_read,
+ gint *bytes_written,
+ GError **error);
+
#ifdef __cplusplus
}
#endif /* __cplusplus */
projects / dana / cg-glib.git / commitdiff