bindings/python/python-complements.c

   1 /*
   2  * python-complements.c
   3  *
   4  * Babeltrace Python module complements, required for Python bindings
   5  *
   6  * Copyright 2012 EfficiOS Inc.
   7  *
   8  * Author: Danny Serres <danny.serres@efficios.com>
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  */
  20
  21 #include "python-complements.h"
  22
  23 /* FILE functions
  24    ----------------------------------------------------
  25 */
  26
  27 FILE *_bt_file_open(char *file_path, char *mode)
  28 {
  29         FILE *fp = stdout;
  30         if (file_path != NULL)
  31                 fp = fopen(file_path, mode);
  32         return fp;
  33 }
  34
  35 void _bt_file_close(FILE *fp)
  36 {
  37         if (fp != NULL)
  38                 fclose(fp);
  39 }
  40
  41
  42 /* List-related functions
  43    ----------------------------------------------------
  44 */
  45
  46 /* ctf-field-list */
  47 struct bt_definition **_bt_python_field_listcaller(
  48                 const struct bt_ctf_event *ctf_event,
  49                 const struct bt_definition *scope)
  50 {
  51         struct bt_definition **list;
  52         unsigned int count;
  53         int ret;
  54
  55         ret = bt_ctf_get_field_list(ctf_event, scope,
  56                 (const struct bt_definition * const **)&list, &count);
  57
  58         if (ret < 0)    /* For python to know an error occured */
  59                 list = NULL;
  60         else            /* For python to know the end is reached */
  61                 list[count] = NULL;
  62
  63         return list;
  64 }
  65
  66 struct bt_definition *_bt_python_field_one_from_list(
  67                 struct bt_definition **list, int index)
  68 {
  69         return list[index];
  70 }
  71
  72 /* event_decl_list */
  73 struct bt_ctf_event_decl **_bt_python_event_decl_listcaller(
  74                 int handle_id, struct bt_context *ctx)
  75 {
  76         struct bt_ctf_event_decl **list;
  77         unsigned int count;
  78         int ret;
  79
  80         ret = bt_ctf_get_event_decl_list(handle_id, ctx,
  81                 (struct bt_ctf_event_decl * const **)&list, &count);
  82
  83         if (ret < 0)    /* For python to know an error occured */
  84                 list = NULL;
  85         else            /* For python to know the end is reached */
  86                 list[count] = NULL;
  87
  88         return list;
  89 }
  90
  91 struct bt_ctf_event_decl *_bt_python_decl_one_from_list(
  92                 struct bt_ctf_event_decl **list, int index)
  93 {
  94         return list[index];
  95 }
  96
  97 /* decl_fields */
  98 struct bt_ctf_field_decl **_by_python_field_decl_listcaller(
  99                 struct bt_ctf_event_decl *event_decl,
 100                 enum bt_ctf_scope scope)
 101 {
 102         struct bt_ctf_field_decl **list;
 103         unsigned int count;
 104         int ret;
 105
 106         ret = bt_ctf_get_decl_fields(event_decl, scope,
 107                 (const struct bt_ctf_field_decl * const **)&list, &count);
 108
 109         if (ret < 0)    /* For python to know an error occured */
 110                 list = NULL;
 111         else            /* For python to know the end is reached */
 112                 list[count] = NULL;
 113
 114         return list;
 115 }
 116
 117 struct bt_ctf_field_decl *_bt_python_field_decl_one_from_list(
 118                 struct bt_ctf_field_decl **list, int index)
 119 {
 120         return list[index];
 121 }
 122
 123 struct definition_array *_bt_python_get_array_from_def(
 124                 struct bt_definition *field)
 125 {
 126         const struct bt_declaration *array_decl;
 127         struct definition_array *array = NULL;
 128
 129         if (!field) {
 130                 goto end;
 131         }
 132
 133         array_decl = bt_ctf_get_decl_from_def(field);
 134         if (bt_ctf_field_type(array_decl) == CTF_TYPE_ARRAY) {
 135                 array = container_of(field, struct definition_array, p);
 136         }
 137 end:
 138         return array;
 139 }