forked from enlightenment/efl
Eina: Eina error documentation improvement.
SVN revision: 60605
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@ -14,6 +14,7 @@ SRCS = \
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eina_accessor_01.c \
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eina_array_01.c \
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eina_array_02.c \
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eina_error_01.c \
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eina_hash_01.c \
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eina_hash_02.c \
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eina_iterator_01.c \
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@ -37,6 +38,7 @@ pkglib_PROGRAMS += \
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eina_accessor_01 \
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eina_array_01 \
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eina_array_02 \
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eina_error_01 \
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eina_hash_01 \
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eina_hash_02 \
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eina_iterator_01 \
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@ -0,0 +1,80 @@
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//Compile with:
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//gcc -g `pkg-config --cflags --libs eina` eina_error_01.c -o eina_error_01
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#include <stdlib.h>
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#include <stdio.h>
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#include <eina_error.h>
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Eina_Error MY_ERROR_NEGATIVE;
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Eina_Error MY_ERROR_NULL;
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void *data_new()
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{
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eina_error_set(0);
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eina_error_set(MY_ERROR_NULL);
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return NULL;
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}
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int test(int n)
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{
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eina_error_set(0);
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if (n < 0)
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{
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eina_error_set(MY_ERROR_NEGATIVE);
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return 0;
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}
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return 1;
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}
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int main(void)
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{
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void *data;
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if (!eina_init())
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{
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printf ("Error during the initialization of eina_error module\n");
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return EXIT_FAILURE;
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}
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MY_ERROR_NEGATIVE = eina_error_msg_static_register("Negative number");
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MY_ERROR_NULL = eina_error_msg_static_register("NULL pointer");
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data = data_new();
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if (!data)
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{
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Eina_Error err;
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err = eina_error_get();
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if (err)
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printf("Error during memory allocation: %s\n",
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eina_error_msg_get(err));
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}
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if (!test(0))
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{
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Eina_Error err;
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err = eina_error_get();
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if (err)
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printf("Error during test function: %s\n",
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eina_error_msg_get(err));
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}
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if (!test(-1))
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{
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Eina_Error err;
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err = eina_error_get();
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if (err)
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printf("Error during test function: %s\n",
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eina_error_msg_get(err));
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}
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eina_shutdown();
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return EXIT_SUCCESS;
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}
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@ -27,16 +27,9 @@
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/**
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* @page tutorial_error_page Error Tutorial
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*
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* @section tutorial_error_introduction Introduction
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*
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* The Eina error module provides a way to manage errors in a simple
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* but powerful way in libraries and modules. It is also used in Eina
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* itself. Similar to libC's @c errno and strerror() facilities, this
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* is extensible and recommended for other libraries and applications.
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*
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* @section tutorial_error_registering_msg Registering messages
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*
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* The error module can provide a system that mimic the errno system
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* The error module can provide a system that mimics the errno system
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* of the C standard library. It consists in 2 parts:
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*
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* @li a way of registering new messages with
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@ -53,85 +46,7 @@
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*
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* Here is an example of use:
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*
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* @code
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* #include <stdlib.h>
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* #include <stdio.h>
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*
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* #include <eina_error.h>
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*
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* Eina_Error MY_ERROR_NEGATIVE;
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* Eina_Error MY_ERROR_NULL;
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*
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* voi *data_new()
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* {
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* eina_error_set(0);
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*
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* eina_error_set(MY_ERROR_NULL);
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* return NULL;
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* }
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*
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* int test(int n)
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* {
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* eina_error_set(0);
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*
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* if (n < 0)
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* {
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* eina_error_set(MY_ERROR_NEGATIVE);
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* return 0;
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* }
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*
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* return 1;
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* }
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*
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* int main(void)
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* {
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* void *data;
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*
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* if (!eina_init())
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* {
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* printf ("Error during the initialization of eina_error module\n");
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* return EXIT_FAILURE;
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* }
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*
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* MY_ERROR_NEGATIVE = eina_error_msg_register("Negative number");
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* MY_ERROR_NULL = eina_error_msg_register("NULL pointer");
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* data = data_new();
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* if (!data)
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* {
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* Eina_Error err;
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*
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* err = eina_error_get();
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* if (err)
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* printf("Error during memory allocation: %s\n",
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* eina_error_msg_get(err));
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* }
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*
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* if (!test(0))
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* {
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* Eina_Error err;
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*
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* err = eina_error_get();
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* if (err)
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* printf("Error during test function: %s\n",
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* eina_error_msg_get(err));
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* }
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*
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* if (!test(-1))
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* {
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* Eina_Error err;
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*
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* err = eina_error_get();
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* if (err)
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* printf("Error during test function: %s\n",
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* eina_error_msg_get(err));
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* }
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*
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* eina_shutdown();
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*
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* return EXIT_SUCCESS;
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* }
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* @endcode
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* @include eina_error_01.c
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*
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* Of course, instead of printf(), eina_log_print() can be used to
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* have beautiful error messages.
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@ -142,13 +57,13 @@
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*
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* @brief These functions provide error management for projects.
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*
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* To use the error system Eina must be initialized with eina_init()
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* and later shut down with eina_shutdown(). Error codes are
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* registered with eina_error_msg_register() and converted from
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* identifier to original message string with eina_error_msg_get().
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* The Eina error module provides a way to manage errors in a simple but
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* powerful way in libraries and modules. It is also used in Eina itself.
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* Similar to libC's @c errno and strerror() facilities, this is extensible and
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* recommended for other libraries and applications.
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*
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* Logging functions are not in eina_error anymore, see
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* eina_log_print() instead.
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* A simple example of how to use this can be seen @ref tutorial_error_page
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* "here".
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*
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* @{
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*/
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@ -217,7 +132,7 @@ EAPI Eina_Error eina_error_msg_static_register(const char *msg) EINA_ARG_NONNUL
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* @param error The Eina_Error to change the message of
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* @param msg The description of the error. This string will be
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* duplicated only if the error was registered with @ref eina_error_msg_register
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* otherwise it must remain intact for the duration
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* otherwise it must remain intact for the duration.
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* @return EINA_TRUE if successful, EINA_FALSE on error
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*
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* This function modifies the message associated with @p error and changes
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@ -247,6 +162,9 @@ EAPI Eina_Error eina_error_get(void);
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*
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* This function sets the last error identifier. The last error can be
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* retrieved with eina_error_get().
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*
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* @note This is also used to clear previous errors, in that case @p err should
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* be @c 0.
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*/
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EAPI void eina_error_set(Eina_Error err);
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