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48 lines
1.4 KiB
48 lines
1.4 KiB
6 years ago
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#ifndef _SELFDRIVE_COMMON_PARAMS_H_
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#define _SELFDRIVE_COMMON_PARAMS_H_
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#include <stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define ERR_NO_VALUE -33
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int write_db_value(const char* params_path, const char* key, const char* value,
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size_t value_size);
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// Reads a value from the params database.
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// Inputs:
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// params_path: The path of the database, or NULL to use the default.
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// key: The key to read.
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// value: A pointer where a newly allocated string containing the db value will
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// be written.
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// value_sz: A pointer where the size of value will be written. Does not
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// include the NULL terminator.
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//
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// Returns: Negative on failure, otherwise 0.
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int read_db_value(const char* params_path, const char* key, char** value,
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size_t* value_sz);
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// Delete a value from the params database.
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// Inputs are the same as read_db_value, without value and value_sz.
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int delete_db_value(const char* params_path, const char* key);
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// Reads a value from the params database, blocking until successful.
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// Inputs are the same as read_db_value.
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void read_db_value_blocking(const char* params_path, const char* key,
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char** value, size_t* value_sz);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#ifdef __cplusplus
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#include <map>
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#include <string>
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int read_db_all(const char* params_path, std::map<std::string, std::string> *params);
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#endif
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#endif // _SELFDRIVE_COMMON_PARAMS_H_
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