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/* argcontext.c - Simple command line argument parsing
* Copyright 1999, 2003 Red Hat Software
*
* 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 <string.h>
#include <stdlib.h>
#include <errno.h>
#include "argcontext.h"
struct _ArgContext
{
GPtrArray *tables;
gpointer cb_data;
};
GQuark
arg_context_error_quark (void)
{
static GQuark q = 0;
if (q == 0)
q = g_quark_from_static_string ("arg-context-error-quark");
return q;
}
ArgContext *
arg_context_new (gpointer cb_data)
{
ArgContext *result = g_new (ArgContext, 1);
result->tables = g_ptr_array_new ();
result->cb_data = cb_data;
return result;
}
void
arg_context_free (ArgContext *context)
{
g_ptr_array_free (context->tables, TRUE);
g_free (context);
}
void
arg_context_add_table (ArgContext *context,
const ArgDesc *table)
{
g_ptr_array_add (context->tables, (ArgDesc *)table);
}
static gboolean
parse_int (const char *arg_name,
const char *arg,
gint *result,
GError **error)
{
gchar *end;
glong tmp = strtol (arg, &end, 0);
errno = 0;
if (*arg == '\0' || *end != '\0')
{
g_set_error (error,
ARG_CONTEXT_ERROR, ARG_CONTEXT_ERROR_BAD_VALUE,
"Cannot parse integer value '%s' for --%s",
arg, arg_name);
return FALSE;
}
*result = tmp;
if (*result != tmp || errno == ERANGE)
{
g_set_error (error,
ARG_CONTEXT_ERROR, ARG_CONTEXT_ERROR_BAD_VALUE,
"Integer value '%s' for %s out of range",
arg, arg_name);
return FALSE;
}
return TRUE;
}
void
arg_context_print_help (ArgContext *context)
{
unsigned int j, k;
int max_name_len = 0;
for (j = 0; j < context->tables->len; j++)
{
ArgDesc *table = context->tables->pdata[j];
for (k = 0; table[k].name; k++)
max_name_len = MAX (strlen (table[k].name), max_name_len);
}
for (j = 0; j < context->tables->len; j++)
{
ArgDesc *table = context->tables->pdata[j];
for (k = 0; table[k].name; k++)
g_print (" --%-*s %s\n",
max_name_len, table[k].name,
table[k].help ? table[k].help : "");
}
}
gboolean
arg_context_parse (ArgContext *context,
gint *argc,
gchar ***argv,
GError **error)
{
int i, j, k;
if (argc && argv)
{
for (i = 1; i < *argc; i++)
{
char *arg;
if ((*argv)[i][0] == '-' && (*argv)[i][1] != '-')
{
g_set_error (error,
ARG_CONTEXT_ERROR, ARG_CONTEXT_ERROR_UNKNOWN_OPTION,
"Unknown option %s", (*argv)[i]);
return FALSE;
}
if (!((*argv)[i][0] == '-' && (*argv)[i][1] == '-'))
continue;
arg = (*argv)[i] + 2;
/* '--' terminates list of arguments */
if (*arg == '\0')
{
(*argv)[i] = NULL;
break;
}
for (j = 0; j < context->tables->len; j++)
{
ArgDesc *table = context->tables->pdata[j];
for (k = 0; table[k].name; k++)
{
switch (table[k].type)
{
case ARG_STRING:
case ARG_CALLBACK:
case ARG_INT:
{
int len = strlen (table[k].name);
if (strncmp (arg, table[k].name, len) == 0 &&
(arg[len] == '=' || arg[len] == 0))
{
const char *value = NULL;
(*argv)[i] = NULL;
if (arg[len] == '=')
value = arg + len + 1;
else if (i < *argc - 1)
{
value = (*argv)[i + 1];
(*argv)[i+1] = NULL;
i++;
}
else
value = "";
switch (table[k].type)
{
case ARG_STRING:
*(const gchar **)table[k].location = value;
break;
case ARG_INT:
if (!parse_int (table[k].name, value,
(gint *)table[k].location,
error))
return FALSE;
break;
case ARG_CALLBACK:
(*table[k].callback)(context, table[k].name, value, context->cb_data);
break;
default:
;
}
goto next_arg;
}
break;
}
case ARG_BOOL:
case ARG_NOBOOL:
if (strcmp (arg, table[k].name) == 0)
{
(*argv)[i] = NULL;
*(gboolean *)table[k].location = (table[k].type == ARG_BOOL) ? TRUE : FALSE;
goto next_arg;
}
}
}
}
g_set_error (error,
ARG_CONTEXT_ERROR, ARG_CONTEXT_ERROR_UNKNOWN_OPTION,
"Unknown option --%s",
arg);
return FALSE;
next_arg:
;
}
for (i = 1; i < *argc; i++)
{
for (k = i; k < *argc; k++)
if ((*argv)[k] != NULL)
break;
if (k > i)
{
k -= i;
for (j = i + k; j < *argc; j++)
(*argv)[j-k] = (*argv)[j];
*argc -= k;
}
}
}
return TRUE;
}
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