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e94ee3bfad
Both scm_to_locale_string and scm_to_utf8_string return newly allocated char*. It is not necessary to return a strdup'd char* and free the original.
293 lines
10 KiB
C
293 lines
10 KiB
C
/********************************************************************\
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* gnc-guile-utils.c -- basic guile extensions *
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* Copyright (C) 2012 Geert Janssens *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License as *
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* published by the Free Software Foundation; either version 2 of *
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* the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License*
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* along with this program; if not, write to the Free Software *
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
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\********************************************************************/
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#include <config.h>
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#include <glib.h>
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#include "swig-runtime.h"
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#include <libguile.h>
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#include "gnc-guile-utils.h"
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#include "guile-mappings.h"
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/********************************************************************\
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* gnc_scm_to_utf8_string *
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* returns the string representation of the scm string in *
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* a newly allocated gchar * or NULL if it can't be retrieved. *
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* *
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* Args: symbol_value - the scm symbol *
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* Returns: newly allocated gchar * or NULL, should be freed with *
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* g_free by the caller *
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\********************************************************************/
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gchar *gnc_scm_to_utf8_string(SCM scm_string)
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{
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if (scm_is_string (scm_string))
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return scm_to_utf8_stringn(scm_string, NULL);
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/* Unable to extract string from the symbol...*/
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g_error ("bad value\n");
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return NULL;
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}
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/********************************************************************\
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* gnc_scm_to_locale_string *
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* returns the string representation of the scm string in *
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* a newly allocated gchar * or NULL if it can't be retrieved. *
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* The string will be encoded in the current locale's encoding. *
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* Note: this function should only be use to convert filenames or *
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* strings from the environment. Or other strings that are in the *
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* system locale. *
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* *
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* Args: symbol_value - the scm symbol *
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* Returns: newly allocated gchar * or NULL, should be freed with *
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* g_free by the caller *
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\********************************************************************/
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gchar *gnc_scm_to_locale_string(SCM scm_string)
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{
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if (scm_is_string (scm_string))
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return scm_to_locale_string(scm_string);
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/* Unable to extract string from the symbol...*/
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g_error ("bad value\n");
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return NULL;
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}
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/********************************************************************\
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* gnc_scm_symbol_to_locale_string *
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* returns the string representation of the scm symbol in *
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* a newly allocated gchar * or NULL if it can't be retrieved. *
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* *
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* Args: symbol_value - the scm symbol *
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* Returns: newly allocated gchar * or NULL, should be freed with *
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* g_free by the caller *
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\********************************************************************/
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gchar *
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gnc_scm_symbol_to_locale_string(SCM symbol_value)
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{
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if (scm_is_symbol(symbol_value))
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{
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SCM string_value = scm_symbol_to_string (symbol_value);
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if (scm_is_string (string_value))
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return scm_to_utf8_string (string_value);
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}
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/* Unable to extract string from the symbol...*/
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g_error ("bad value\n");
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return NULL;
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}
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/********************************************************************\
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* gnc_scm_call_1_to_string *
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* returns the malloc'ed string returned by the guile function *
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* or NULL if it can't be retrieved *
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* *
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* Args: func - the guile function to call *
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* arg - the single function argument *
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* Returns: g_malloc'ed char * or NULL must be freed with g_free *
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\********************************************************************/
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char *
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gnc_scm_call_1_to_string(SCM func, SCM arg)
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{
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SCM value;
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if (scm_is_procedure(func))
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{
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value = scm_call_1(func, arg);
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if (scm_is_string(value))
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{
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return gnc_scm_to_utf8_string(value);
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}
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else
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{
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g_error ("bad value\n");
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}
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}
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else
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{
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g_error ("not a procedure\n");
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}
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return NULL;
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}
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/********************************************************************\
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* gnc_scm_call_1_symbol_to_string *
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* returns the malloc'ed string returned by the guile function *
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* or NULL if it can't be retrieved. The return value of the *
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* function should be a symbol. *
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* *
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* Args: func - the guile function to call *
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* arg - the single function argument *
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* Returns: malloc'ed char * or NULL *
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\********************************************************************/
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char *
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gnc_scm_call_1_symbol_to_string(SCM func, SCM arg)
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{
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SCM symbol_value;
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if (scm_is_procedure(func))
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{
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symbol_value = scm_call_1(func, arg);
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return gnc_scm_symbol_to_locale_string (symbol_value);
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}
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else
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{
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g_error ("not a procedure\n");
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}
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return NULL;
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}
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/********************************************************************\
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* gnc_scm_call_1_to_procedure *
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* returns the SCM handle to the procedure returned by the guile *
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* function, or SCM_UNDEFINED if it couldn't be retrieved. *
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* *
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* Args: func - the guile function to call *
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* arg - the single function argument *
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* Returns: SCM function handle or SCM_UNDEFINED *
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\********************************************************************/
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SCM
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gnc_scm_call_1_to_procedure(SCM func, SCM arg)
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{
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SCM value;
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if (scm_is_procedure(func))
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{
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value = scm_call_1(func, arg);
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if (scm_is_procedure(value))
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return value;
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else
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{
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g_error ("bad value\n");
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}
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}
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else
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{
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g_error ("not a procedure\n");
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}
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return SCM_UNDEFINED;
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}
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/********************************************************************\
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* gnc_scm_call_1_to_list *
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* returns the SCM handle to the list returned by the guile *
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* function, or SCM_UNDEFINED if it couldn't be retrieved. *
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* *
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* Args: func - the guile function to call *
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* arg - the single function argument *
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* Returns: SCM list handle or SCM_UNDEFINED *
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\********************************************************************/
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SCM
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gnc_scm_call_1_to_list(SCM func, SCM arg)
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{
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SCM value;
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if (scm_is_procedure(func))
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{
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value = scm_call_1(func, arg);
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if (scm_is_list(value))
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return value;
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else
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{
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g_error ("bad value\n");
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}
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}
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else
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{
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g_error ("not a procedure\n");
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}
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return SCM_UNDEFINED;
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}
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/********************************************************************\
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* gnc_scm_call_1_to_vector *
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* returns the SCM handle to the vector returned by the guile *
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* function, or SCM_UNDEFINED if it couldn't be retrieved. *
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* *
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* Args: func - the guile function to call *
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* arg - the single function argument *
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* Returns: SCM vector handle or SCM_UNDEFINED *
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\********************************************************************/
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SCM
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gnc_scm_call_1_to_vector(SCM func, SCM arg)
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{
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SCM value;
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if (scm_is_procedure(func))
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{
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value = scm_call_1(func, arg);
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if (scm_is_vector(value))
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return value;
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else
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{
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g_error ("bad value\n");
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}
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}
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else
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{
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g_error ("not a procedure\n");
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}
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return SCM_UNDEFINED;
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}
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/* Clean up a scheme options string for use in a key/value file.
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* This function removes all full line comments, removes all blank
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* lines, and removes all leading/trailing white space. */
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gchar *gnc_scm_strip_comments (SCM scm_text)
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{
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gchar *raw_text, *text, **splits;
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gint i, j;
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raw_text = gnc_scm_to_utf8_string (scm_text);
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splits = g_strsplit(raw_text, "\n", -1);
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for (i = j = 0; splits[i]; i++)
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{
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if ((splits[i][0] == ';') || (splits[i][0] == '\0'))
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{
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g_free(splits[i]);
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continue;
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}
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splits[j++] = splits [i];
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}
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splits[j] = NULL;
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text = g_strjoinv(" ", splits);
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g_free (raw_text);
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g_strfreev(splits);
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return text;
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}
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