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/* Message list header manipulation.
Copyright (C) 2007, 2015-2016 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2007.
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/>. */
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
/* Specification. */
#include "msgl-header.h"
#include <string.h>
#include "xalloc.h"
#define SIZEOF(a) (sizeof(a) / sizeof(a[0]))
void
msgdomain_list_set_header_field (msgdomain_list_ty *mdlp,
const char *field, const char *value)
{
/* The known fields in their usual order. */
static const struct
{
const char *name;
size_t len;
}
known_fields[] =
{
{ "Project-Id-Version:", sizeof ("Project-Id-Version:") - 1 },
{ "Report-Msgid-Bugs-To:", sizeof ("Report-Msgid-Bugs-To:") - 1 },
{ "POT-Creation-Date:", sizeof ("POT-Creation-Date:") - 1 },
{ "PO-Revision-Date:", sizeof ("PO-Revision-Date:") - 1 },
{ "Last-Translator:", sizeof ("Last-Translator:") - 1 },
{ "Language-Team:", sizeof ("Language-Team:") - 1 },
{ "Language:", sizeof ("Language:") - 1 },
{ "MIME-Version:", sizeof ("MIME-Version:") - 1 },
{ "Content-Type:", sizeof ("Content-Type:") - 1 },
{ "Content-Transfer-Encoding:",
sizeof ("Content-Transfer-Encoding:") - 1 }
};
size_t field_len;
int field_index;
size_t k, i;
field_len = strlen (field);
/* Search the field in known_fields[]. */
field_index = -1;
for (k = 0; k < SIZEOF (known_fields); k++)
if (strcmp (known_fields[k].name, field) == 0)
{
field_index = k;
break;
}
for (i = 0; i < mdlp->nitems; i++)
{
message_list_ty *mlp = mdlp->item[i]->messages;
size_t j;
/* Search the header entry. */
for (j = 0; j < mlp->nitems; j++)
if (is_header (mlp->item[j]) && !mlp->item[j]->obsolete)
{
message_ty *mp = mlp->item[j];
/* Modify the header entry. */
const char *header = mp->msgstr;
char *new_header =
XNMALLOC (strlen (header) + 1
+ strlen (field) + 1 + strlen (value) + 1 + 1,
char);
/* Test whether the field already occurs in the header entry. */
const char *h;
for (h = header; *h != '\0'; )
{
if (strncmp (h, field, field_len) == 0)
break;
h = strchr (h, '\n');
if (h == NULL)
break;
h++;
}
if (h != NULL && *h != '\0')
{
/* Replace the field. */
char *p = new_header;
memcpy (p, header, h - header);
p += h - header;
p = stpcpy (p, field);
p = stpcpy (stpcpy (stpcpy (p, " "), value), "\n");
h = strchr (h, '\n');
if (h != NULL)
{
h++;
stpcpy (p, h);
}
}
else if (field_index < 0)
{
/* An unknown field. Append it at the end. */
char *p = new_header;
p = stpcpy (p, header);
if (p > new_header && p[-1] != '\n')
*p++ = '\n';
p = stpcpy (p, field);
stpcpy (stpcpy (stpcpy (p, " "), value), "\n");
}
else
{
/* Find the appropriate position for inserting the field. */
for (h = header; *h != '\0'; )
{
/* Test whether h starts with a field name whose index is
> field_index. */
for (k = field_index + 1; k < SIZEOF (known_fields); k++)
if (strncmp (h, known_fields[k].name, known_fields[k].len)
== 0)
break;
if (k < SIZEOF (known_fields))
break;
h = strchr (h, '\n');
if (h == NULL)
break;
h++;
}
if (h != NULL && *h != '\0')
{
/* Insert the field at position h. */
char *p = new_header;
memcpy (p, header, h - header);
p += h - header;
p = stpcpy (p, field);
p = stpcpy (stpcpy (stpcpy (p, " "), value), "\n");
stpcpy (p, h);
}
else
{
/* Append it at the end. */
char *p = new_header;
p = stpcpy (p, header);
if (p > new_header && p[-1] != '\n')
*p++ = '\n';
p = stpcpy (p, field);
stpcpy (stpcpy (stpcpy (p, " "), value), "\n");
}
}
mp->msgstr = new_header;
}
}
}
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