mpeg4ip_config_set.h

完整的RTP RTSP代码库

/*
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is MPEG4IP.
 * 
 * The Initial Developer of the Original Code is Cisco Systems Inc.
 * Portions created by Cisco Systems Inc. are
 * Copyright (C) Cisco Systems Inc. 2000, 2001.  All Rights Reserved.
 * 
 * Contributor(s): 
 *		Dave Mackie		[e-mail]
 *		Bill May 		[e-mail]
 */

#ifndef __CONFIG_SET_H__
#define __CONFIG_SET_H__

#include <mpeg4ip.h>


#ifndef CONFIG_SAFETY
#define CONFIG_SAFETY 1
#endif

typedef u_int32_t config_integer_t;

typedef u_int32_t config_index_t;


enum ConfigException {
	CONFIG_ERR_INAME,
	CONFIG_ERR_TYPE,
	CONFIG_ERR_MEMORY,
};

// TBD type specific exception info and printing utility
class CConfigException {
public:
	CConfigException(ConfigException e) {
		type = e;
	}
	ConfigException	type;
};

#define CONFIG_MAX_STRLEN	255

// TBD weld this in, and throw exception

typedef enum ConfigType {
	CONFIG_TYPE_UNDEFINED,
	CONFIG_TYPE_INTEGER,
	CONFIG_TYPE_BOOL,
	CONFIG_TYPE_STRING,
	CONFIG_TYPE_FLOAT
} ConfigType;

union UConfigValue {
	UConfigValue(void) {
		m_svalue = NULL;
	}
	UConfigValue(config_integer_t ivalue) {
		m_ivalue = ivalue;
	}
	UConfigValue(bool bvalue) {
		m_bvalue = bvalue;
	}
  UConfigValue(const char *svalue) {
    m_svalue = svalue;
  }
	UConfigValue(char* svalue) {
		m_svalue = svalue;
	}
	UConfigValue(float fvalue) {
		m_fvalue = fvalue;
	}

	config_integer_t	m_ivalue;
	bool			m_bvalue;
	const char*		m_svalue;
	float				m_fvalue;
};

typedef struct SConfigVariable {
        config_index_t	               *m_iName;
	const char* 			m_sName;
	ConfigType			m_type;
	UConfigValue			m_defaultValue;
	const char*                     m_helpString;
	UConfigValue			m_value;
} SConfigVarible;



struct SUnknownConfigVariable {
  struct SUnknownConfigVariable *next;
  SConfigVariable *value;
};

class CConfigSet {
public:
	CConfigSet(const SConfigVariable* variables, 
	  config_index_t numVariables, 
	  const char* defaultFileName) {
	  uint32_t size;
		m_debug = false;
		m_numVariables = numVariables;
		size = sizeof(SConfigVariable) * numVariables;
		m_variables = 
		  (SConfigVariable*)malloc(size);

		memcpy(m_variables, variables, size);
		m_fileName = defaultFileName == NULL ? NULL : 
		  strdup(defaultFileName);
		SetToDefaults();
		m_unknown_head = NULL;
	};

	~CConfigSet() {
		CHECK_AND_FREE(m_fileName);
		for (config_index_t i = 0; i < m_numVariables; i++) {
		  CleanUpConfig(&m_variables[i]);
		}
		free(m_variables);
		m_variables = NULL;
		SUnknownConfigVariable *ptr = m_unknown_head;
		while (ptr != NULL) {
		  m_unknown_head = ptr->next;
		  CHECK_AND_FREE(ptr->value->m_sName);
		  CHECK_AND_FREE(ptr->value->m_value.m_svalue);
		  free(ptr->value);
		  free(ptr);
		  ptr = m_unknown_head;
		}
	}

	void InitializeIndexes(void) {
	  for (config_index_t ix = 0; ix < m_numVariables; ix++) {
	      *m_variables[ix].m_iName = ix;
	    }
	}

	void AddConfigVariables (const SConfigVariable* vars,
				 config_index_t numVariables) {
	  config_index_t start = m_numVariables;
	  uint32_t size = sizeof(SConfigVariable) * 
	    (m_numVariables + numVariables);
	  m_variables = (SConfigVariable*)realloc(m_variables, size);
	  memcpy(&m_variables[m_numVariables], vars, 
		 numVariables * sizeof(SConfigVariable));
	  m_numVariables += numVariables;
	  SetToDefaults(start);
	}

	const char* GetFileName() {
		return m_fileName;
	}

	void SetFileName(const char *name) {
	  CHECK_AND_FREE(m_fileName);
	  m_fileName = strdup(name);
	};
	
	inline void CheckIName(config_index_t iName) {
		if (iName >= m_numVariables) {
		  fprintf(stderr, 
			  "config variable index failure - try %u max %u\n",
			  iName, m_numVariables);
		  fflush(stderr);
		  throw new CConfigException(CONFIG_ERR_INAME);
		}
		if (*m_variables[iName].m_iName != iName) {
		  fprintf(stderr, 
			   "config variable index mismatch %u should %u\n",
			   iName, *m_variables[iName].m_iName);
		  fflush(stderr);
		  throw new CConfigException(CONFIG_ERR_INAME);
		}
	}


	inline void CheckIntegerType(config_index_t iName) {
		if (m_variables[iName].m_type != CONFIG_TYPE_INTEGER) {
		  fprintf(stderr, 
			  "config type mismatch on %s - shouldn't be integer\n", 
			  m_variables[iName].m_sName);
		  fflush(stderr);
		  throw new CConfigException(CONFIG_ERR_TYPE);
		}
	}

	inline void CheckBoolType(config_index_t iName) {
		if (m_variables[iName].m_type != CONFIG_TYPE_BOOL) {
		  fprintf(stderr, 
			  "config type mismatch on %s - shouldn't be bool\n", 
			  m_variables[iName].m_sName);
		  fflush(stderr);
		  throw new CConfigException(CONFIG_ERR_TYPE);
		}
	}

	inline void CheckStringType(config_index_t iName) {
		if (m_variables[iName].m_type != CONFIG_TYPE_STRING) {
		  fprintf(stderr, 
			  "config type mismatch on %s - shouldn't be string\n", 
			  m_variables[iName].m_sName);
		  fflush(stderr);
			throw new CConfigException(CONFIG_ERR_TYPE);
		}
	}

	inline void CheckFloatType(config_index_t iName) {
		if (m_variables[iName].m_type != CONFIG_TYPE_FLOAT) {
		  fprintf(stderr, 
			  "config type mismatch on %s - shouldn't be float\n", 
			  m_variables[iName].m_sName);
		  fflush(stderr);
			throw new CConfigException(CONFIG_ERR_TYPE);
		}
	}

	inline bool IsDefault (const config_index_t iName) {
#if CONFIG_SAFETY
	  CheckIName(iName);
#endif
	  return IsValueDefault(&m_variables[iName]);
	};

	inline config_integer_t GetIntegerValue(const config_index_t iName) {
#if CONFIG_SAFETY
		CheckIName(iName);
		CheckIntegerType(iName);
#endif
		return m_variables[iName].m_value.m_ivalue;
	}

	inline void SetIntegerValue(const config_index_t iName, 
	  config_integer_t ivalue) {
#if CONFIG_SAFETY
		CheckIName(iName);
		CheckIntegerType(iName);
#endif
		m_variables[iName].m_value.m_ivalue = ivalue;
	}

	inline bool GetBoolValue(const config_index_t iName) {
#if CONFIG_SAFETY
		CheckIName(iName);
		CheckBoolType(iName);
#endif
		return m_variables[iName].m_value.m_bvalue;;
	}

	inline void SetBoolValue(const config_index_t iName, bool bvalue) {
#if CONFIG_SAFETY
		CheckIName(iName);
		CheckBoolType(iName);
#endif
		m_variables[iName].m_value.m_bvalue = bvalue;
	}

	inline const char* GetStringValue(const config_index_t iName) {
#if CONFIG_SAFETY
		CheckIName(iName);
		CheckStringType(iName);
#endif
		return m_variables[iName].m_value.m_svalue;
	}

	inline const char* GetHelpValue(const config_index_t iName) {
#if CONFIG_SAFETY
	  CheckIName(iName);
#endif
	  return m_variables[iName].m_helpString;
	};

	inline void SetStringValue(const config_index_t iName, const char* svalue) {
#if CONFIG_SAFETY
		CheckIName(iName);
		CheckStringType(iName);
#endif
		if (svalue == m_variables[iName].m_value.m_svalue) {
			return;
		}
		CHECK_AND_FREE(m_variables[iName].m_value.m_svalue);
		if (svalue == NULL) {
		  m_variables[iName].m_value.m_svalue = NULL;
		} else {
		  m_variables[iName].m_value.m_svalue = strdup(svalue);
		  if (m_variables[iName].m_value.m_svalue == NULL) {
		    throw new CConfigException(CONFIG_ERR_MEMORY);
		  }
		}
	}

	inline float GetFloatValue(const config_index_t iName) {
#if CONFIG_SAFETY
		CheckIName(iName);
		CheckFloatType(iName);
#endif
		return m_variables[iName].m_value.m_fvalue;
	}

	inline void SetFloatValue(const config_index_t iName, float fvalue) {
#if CONFIG_SAFETY
		CheckIName(iName);
		CheckFloatType(iName);
#endif
		m_variables[iName].m_value.m_fvalue = fvalue;
	}

	void SetToDefaults(int start = 0) {
		for (config_index_t i = start; i < m_numVariables; i++) {
			SetToDefault(&m_variables[i]);
		}
	}

	void SetToDefault(const config_index_t iName) {
	  SetToDefault(&m_variables[iName]);
	}

	void ProcessLine (char *line) {
	// comment
	  SConfigVariable* var;
	  if (line[0] == '#') {
	    return;
	  }
	  char* s = line, *name;
	  while (*s != '\0') s++;
	  s--;
	  while (isspace(*s)) {