eccodes/src/action_class_template.c

/*
 * (C) Copyright 2005- ECMWF.
 *
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
 *
 * In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
 * virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
 */

/***************************************************************************
 *   Jean Baptiste Filippi - 01.11.2005                                                           *
 *   Enrico Fucile
 *                                                                         *
 ***************************************************************************/

#include "grib_api_internal.h"
/*
   This is used by make_class.pl

   START_CLASS_DEF
   CLASS      = action
   SUPER      = action_class_section
   IMPLEMENTS = create_accessor
   IMPLEMENTS = dump
   IMPLEMENTS = destroy
   IMPLEMENTS = reparse
   MEMBERS    = int nofail
   MEMBERS    = char*           arg
   END_CLASS_DEF

 */

/* START_CLASS_IMP */

/*

Don't edit anything between START_CLASS_IMP and END_CLASS_IMP
Instead edit values between START_CLASS_DEF and END_CLASS_DEF
or edit "action.class" and rerun ./make_class.pl

*/

static void init_class      (grib_action_class*);
static void dump            (grib_action* d, FILE*,int);
static void destroy         (grib_context*,grib_action*);
static int create_accessor(grib_section*,grib_action*,grib_loader*);
static grib_action* reparse(grib_action* a,grib_accessor* acc,int *doit);


typedef struct grib_action_template {
    grib_action          act;  
    /* Members defined in section */
    /* Members defined in template */
    int nofail;
    char*           arg;
} grib_action_template;

extern grib_action_class* grib_action_class_section;

static grib_action_class _grib_action_class_template = {
    &grib_action_class_section,                              /* super                     */
    "action_class_template",                              /* name                      */
    sizeof(grib_action_template),            /* size                      */
    0,                                   /* inited */
    &init_class,                         /* init_class */
    0,                               /* init                      */
    &destroy,                            /* destroy */

    &dump,                               /* dump                      */
    0,                               /* xref                      */

    &create_accessor,             /* create_accessor*/

    0,                            /* notify_change */
    &reparse,                            /* reparse */
    0,                            /* execute */
};

grib_action_class* grib_action_class_template = &_grib_action_class_template;

static void init_class(grib_action_class* c)
{
    c->xref    =    (*(c->super))->xref;
    c->notify_change    =    (*(c->super))->notify_change;
    c->execute    =    (*(c->super))->execute;
}
/* END_CLASS_IMP */

grib_action* grib_action_create_template(grib_context* context, int nofail, const char* name, const char* arg1)
{
    grib_action_template* a;
    grib_action_class* c = grib_action_class_template;
    grib_action* act     = (grib_action*)grib_context_malloc_clear_persistent(context, c->size);
    act->name            = grib_context_strdup_persistent(context, name);
    act->op              = grib_context_strdup_persistent(context, "section");
    act->cclass          = c;
    act->next            = NULL;
    act->context         = context;
    a                    = (grib_action_template*)act;
    a->nofail            = nofail;
    if (arg1)
        a->arg = grib_context_strdup_persistent(context, arg1);
    else
        a->arg = NULL;

    return act;
}

static void dump(grib_action* act, FILE* f, int lvl)
{
    grib_action_template* a = (grib_action_template*)act;
    int i                   = 0;
    for (i = 0; i < lvl; i++)
        grib_context_print(act->context, f, "     ");
    grib_context_print(act->context, f, "Template %s  %s\n", act->name, a->arg);
}

grib_action* get_empty_template(grib_context* c, int* err)
{
    char fname[] = "empty_template.def";
    char* path   = 0;

    path = grib_context_full_defs_path(c, fname);
    if (path) {
        *err = GRIB_SUCCESS;
        return grib_parse_file(c, path);
    }
    else {
        *err = GRIB_INTERNAL_ERROR;
        grib_context_log(c, GRIB_LOG_ERROR, "get_empty_template: unable to get template %s", fname);
        return NULL;
    }
}

static int create_accessor(grib_section* p, grib_action* act, grib_loader* h)
{
    int ret                 = GRIB_SUCCESS;
    grib_action_template* a = (grib_action_template*)act;
    grib_action* la         = NULL;
    grib_action* next       = NULL;
    grib_accessor* as       = NULL;
    grib_section* gs        = NULL;

    char fname[1024] = {0,};
    char* fpath = 0;

    as = grib_accessor_factory(p, act, 0, NULL);

    if (!as)
        return GRIB_INTERNAL_ERROR;
    if (a->arg) {
        ret = grib_recompose_name(p->h, as, a->arg, fname, 1);

        if ((fpath = grib_context_full_defs_path(p->h->context, fname)) == NULL) {
            if (!a->nofail) {
                grib_context_log(p->h->context, GRIB_LOG_ERROR,
                                 "Unable to find template %s from %s ", act->name, fname);
                return GRIB_FILE_NOT_FOUND;
            }
            la = get_empty_template(p->h->context, &ret);
            if (ret)
                return ret;
        }
        else
            la = grib_parse_file(p->h->context, fpath);
    }
    as->flags |= GRIB_ACCESSOR_FLAG_HIDDEN;
    gs         = as->sub_section;
    gs->branch = la; /* Will be used to prevent unnecessary reparse */

    grib_push_accessor(as, p->block);

    if (la) {
        next = la;

        while (next) {
            ret = grib_create_accessor(gs, next, h);
            if (ret != GRIB_SUCCESS) {
                if (p->h->context->debug) {
                    grib_context_log(p->h->context, GRIB_LOG_ERROR,
                                     "Error processing template %s: %s [%s] %04lx",
                                     fname, grib_get_error_message(ret), next->name, next->flags);
                }
                return ret;
            }
            next = next->next;
        }
    }
    return GRIB_SUCCESS;
}

static grib_action* reparse(grib_action* a, grib_accessor* acc, int* doit)
{
    grib_action_template* self = (grib_action_template*)a;
    char* fpath                = 0;

    if (self->arg) {
        char fname[1024];
        grib_recompose_name(grib_handle_of_accessor(acc), NULL, self->arg, fname, 1);

        if ((fpath = grib_context_full_defs_path(acc->context, fname)) == NULL) {
            if (!self->nofail) {
                grib_context_log(acc->context, GRIB_LOG_ERROR,
                                 "Unable to find template %s from %s ", a->name, fname);
                return NULL;
            }
            return a;
        }

        /* printf("REPARSE %s\n",fpath); */
        return grib_parse_file(acc->context, fpath);
    }

    return NULL;
}

static void destroy(grib_context* context, grib_action* act)
{
    grib_action_template* a = (grib_action_template*)act;

    grib_context_free_persistent(context, a->arg);
    grib_context_free_persistent(context, act->name);
    grib_context_free_persistent(context, act->op);
}