Imported Upstream version 17.05.2

[deb_dpdk.git] / lib / librte_cfgfile / rte_cfgfile.h

diff --git a/lib/librte_cfgfile/rte_cfgfile.h b/lib/librte_cfgfile/rte_cfgfile.h
index f649836..fa10d40 100644 (file)
--- a/lib/librte_cfgfile/rte_cfgfile.h
+++ b/lib/librte_cfgfile/rte_cfgfile.h
@@ -34,6 +34,8 @@
 #ifndef __INCLUDE_RTE_CFGFILE_H__
 #define __INCLUDE_RTE_CFGFILE_H__
 
+#include <stddef.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -64,18 +66,60 @@ struct rte_cfgfile_entry {
        char value[CFG_VALUE_LEN]; /**< Value */
 };
 
+/** Configuration file operation optional arguments */
+struct rte_cfgfile_parameters {
+       /** Config file comment character; one of '!', '#', '%', ';', '@' */
+       char comment_character;
+};
+
+/**@{ cfgfile load operation flags */
+enum {
+       /**
+        * Indicates that the file supports key value entries before the first
+        * defined section.  These entries can be accessed in the "GLOBAL"
+        * section.
+        */
+       CFG_FLAG_GLOBAL_SECTION = 1,
+
+       /**
+        * Indicates that file supports key value entries where the value can
+        * be zero length (e.g., "key=").
+        */
+       CFG_FLAG_EMPTY_VALUES = 2,
+};
+/**@} */
+
+/** Defines the default comment character used for parsing config files. */
+#define CFG_DEFAULT_COMMENT_CHARACTER ';'
+
 /**
 * Open config file
 *
 * @param filename
 *   Config file name
 * @param flags
-*   Config file flags, Reserved for future use. Must be set to 0.
+*   Config file flags
 * @return
 *   Handle to configuration file on success, NULL otherwise
 */
 struct rte_cfgfile *rte_cfgfile_load(const char *filename, int flags);
 
+/**
+ * Open config file with specified optional parameters.
+ *
+ * @param filename
+ *   Config file name
+ * @param flags
+ *   Config file flags
+ * @param params
+ *   Additional configuration attributes.  Must be configured with desired
+ *   values prior to invoking this API.
+ * @return
+ *   Handle to configuration file on success, NULL otherwise
+ */
+struct rte_cfgfile *rte_cfgfile_load_with_params(const char *filename,
+       int flags, const struct rte_cfgfile_parameters *params);
+
 /**
 * Get number of sections in config file
 *
@@ -86,7 +130,7 @@ struct rte_cfgfile *rte_cfgfile_load(const char *filename, int flags);
 * @param length
 *   Maximum section name length
 * @return
-*   0 on success, error code otherwise
+*   Number of sections
 */
 int rte_cfgfile_num_sections(struct rte_cfgfile *cfg, const char *sec_name,
        size_t length);
@@ -100,13 +144,13 @@ int rte_cfgfile_num_sections(struct rte_cfgfile *cfg, const char *sec_name,
 * @param cfg
 *   Config file
 * @param sections
-*   Array containing section names after successful invocation. Each elemen
+*   Array containing section names after successful invocation. Each element
 *   of this array should be preallocated by the user with at least
 *   CFG_NAME_LEN characters.
 * @param max_sections
 *   Maximum number of section names to be stored in sections array
 * @return
-*   0 on success, error code otherwise
+*   Number of populated sections names
 */
 int rte_cfgfile_sections(struct rte_cfgfile *cfg, char *sections[],
        int max_sections);
@@ -134,12 +178,13 @@ int rte_cfgfile_has_section(struct rte_cfgfile *cfg, const char *sectionname);
 * @param sectionname
 *   Section name
 * @return
-*   Number of entries in section
+*   Number of entries in section on success, -1 otherwise
 */
 int rte_cfgfile_section_num_entries(struct rte_cfgfile *cfg,
        const char *sectionname);
 
-/** Get section entries as key-value pairs
+/**
+* Get section entries as key-value pairs
 *
 * If multiple sections have the given name this function operates on the
 * first one.
@@ -154,14 +199,15 @@ int rte_cfgfile_section_num_entries(struct rte_cfgfile *cfg,
 * @param max_entries
 *   Maximum number of section entries to be stored in entries array
 * @return
-*   0 on success, error code otherwise
+*   Number of entries populated on success, -1 otherwise
 */
 int rte_cfgfile_section_entries(struct rte_cfgfile *cfg,
        const char *sectionname,
        struct rte_cfgfile_entry *entries,
        int max_entries);
 
-/** Get section entries as key-value pairs
+/**
+* Get section entries as key-value pairs
 *
 * The index of a section is the same as the index of its name in the
 * result of rte_cfgfile_sections. This API can be used when there are
@@ -180,7 +226,7 @@ int rte_cfgfile_section_entries(struct rte_cfgfile *cfg,
 * @param max_entries
 *   Maximum number of section entries to be stored in entries array
 * @return
-*   Number of entries populated on success, negative error code otherwise
+*   Number of entries populated on success, -1 otherwise
 */
 int rte_cfgfile_section_entries_by_index(struct rte_cfgfile *cfg,
        int index,
@@ -188,7 +234,8 @@ int rte_cfgfile_section_entries_by_index(struct rte_cfgfile *cfg,
        struct rte_cfgfile_entry *entries,
        int max_entries);
 
-/** Get value of the named entry in named config file section
+/**
+* Get value of the named entry in named config file section
 *
 * If multiple sections have the given name this function operates on the
 * first one.
@@ -200,13 +247,14 @@ int rte_cfgfile_section_entries_by_index(struct rte_cfgfile *cfg,
 * @param entryname
 *   Entry name
 * @return
-*   Entry value
+*   Entry value on success, NULL otherwise
 */
 const char *rte_cfgfile_get_entry(struct rte_cfgfile *cfg,
        const char *sectionname,
        const char *entryname);
 
-/** Check if given entry exists in named config file section
+/**
+* Check if given entry exists in named config file section
 *
 * If multiple sections have the given name this function operates on the
 * first one.
@@ -223,12 +271,13 @@ const char *rte_cfgfile_get_entry(struct rte_cfgfile *cfg,
 int rte_cfgfile_has_entry(struct rte_cfgfile *cfg, const char *sectionname,
        const char *entryname);
 
-/** Close config file
+/**
+* Close config file
 *
 * @param cfg
 *   Config file
 * @return
-*   0 on success, error code otherwise
+*   0 on success, -1 otherwise
 */
 int rte_cfgfile_close(struct rte_cfgfile *cfg);