libcm is a C development framework with an emphasis on audio signal processing applications.
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cmPgmOpts.h 8.7KB

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  1. #ifndef cmPgmOpts_h
  2. #define cmPgmOpts_h
  3. //{
  4. //(
  5. // Command line program option syntax:
  6. //
  7. //
  8. // '-'<charId>* <value>+ - a dash followed by one or more one character id's optionally followed by a parameter value.
  9. // '--'<wordId> <value>+ - a double dash followed by a word id optionally followed by a parameter value.
  10. //
  11. // A char id is a single character.
  12. // A word id is a string of characters with no intervening white space.
  13. //
  14. // Notes:
  15. // 1) There is no way to give multiple <values> without an intervening character or word id.
  16. // A <value> must therefore always be immediately preceded by an id.
  17. // 2) There must never be a space between the dash(es) and the characters forming the identifier.
  18. // 3) There must always be a space between the identifier and any subsequent <value>.
  19. // 4) See src/mas/src/main.c for a complete example.
  20. //
  21. // Terms:
  22. // Parameter - Description of the allowable types and constraints for a program option.
  23. // Argument - An instance of a parameter or the values associated with a parameter.
  24. //
  25. //)
  26. #ifdef __cplusplus
  27. extern "C" {
  28. #endif
  29. //(
  30. // cmPgmOpts Result Codes
  31. enum
  32. {
  33. kOkPoRC = cmOkRC,
  34. kSyntaxErrPoRC,
  35. kInvalidIdxPoRC,
  36. kParseFailPoRC,
  37. kNoReqArgPoRC,
  38. kDuplicateIdPoRC,
  39. kArgCntErrPoRC,
  40. kParmNotFoundPoRC,
  41. kInstNotFoundPoRC,
  42. kTypeErrPoRC
  43. };
  44. // cmPgmOpts parameter id's
  45. enum
  46. {
  47. kPrintHelpPoId,
  48. kVersionPoId,
  49. kPrintParmsPoId,
  50. kNoExecPoId,
  51. kBasePoId
  52. };
  53. typedef cmRC_t cmPoRC_t;
  54. typedef cmHandle_t cmPgmOptH_t;
  55. extern cmPgmOptH_t cmPgmOptNullHandle;
  56. // Initialize a program options parser.
  57. cmPoRC_t cmPgmOptInitialize(cmCtx_t* c, cmPgmOptH_t* hp, const cmChar_t* helpBegStr, const cmChar_t* helpEndStr );
  58. // Finalize a program options parser.
  59. cmPoRC_t cmPgmOptFinalize( cmPgmOptH_t* hp );
  60. // Return true if the program options parser was successfully initialized.
  61. bool cmPgmOptIsValid( cmPgmOptH_t h );
  62. // Flag used by the 'flags' arg. to cmPgmOptInstall().
  63. enum {
  64. kNoPoFlags = 0x000,
  65. kReqPoFl = 0x001, // this is a required parameter
  66. kBoolPoFl = 0x002, // this parameter takes a value
  67. kCharPoFl = 0x004, // parm. value is a character
  68. kIntPoFl = 0x008, // parm. value is a decimal int
  69. kUIntPoFl = 0x010, // parm. value is a decimal unsigned int
  70. kHexPoFl = 0x020, // parm. value is a hex. unsigned int
  71. kDblPoFl = 0x040, // parm. value is a decimal double
  72. kStrPoFl = 0x080, // parm. value is a string (default)
  73. kEnumPoFl = 0x100, // parm. valus is a enum type (automatically set by a non-zero enumId)
  74. kTypeMaskPoFl = 0x1f6
  75. };
  76. // Define a parameter.
  77. //
  78. // unsigned numId, - numeric id used to identify this parameter
  79. // const cmChar_t charId, - a character used to identify this parameter
  80. // const cmChar_t* wordId, - a label used to identify this parameter
  81. // unsigned flags, - kNoPoFlags | kReqPoFl (the type flags are automatically assigned)
  82. // unsigned enumId, - non-zero value used to group enumerated parameter values (ignored for non-enum types)
  83. // unsigned cnt, - count of times this parameter may repeated or 0 for an unlimited repetitions
  84. // const cmChar_t* helpStr - a textual description of this parameter
  85. //
  86. // Notes
  87. // 1) 'numId','charId', and 'wordId' must all be unique among all parameter definitions.
  88. // 2) If no parameter value type flag is given then the type is assumed to be of type bool.
  89. // 3) For all parameter value types except the string type arguments are automatically parsed to the
  90. // defined type. To avoid automatic parsing simply define the type as a string (using cmPgmOptInstallStr()).
  91. // 4) All expected parameters must be defined prior to calling cmPgmOptParse().
  92. // 5) One call to cmPgmOPtInstallEnum() is made for each possible enumeration value - where the 'enumId' gives the value.
  93. // A given set of associated enum values is grouped by giving a common 'numId'.
  94. // Example:
  95. // cmPgmOptInstallEnum(h,colorId,...,redId,...);
  96. // cmPgmOptInstallEnum(h,colorId,...,greenId,...);
  97. // cmPgmOptInstallEnum(h,colorId,...,blueId,...);
  98. //
  99. // 6) The following id's are used for built-in actions and are therefore restricted from use by the client:
  100. // a. -h --help Print the program usage information.
  101. // b. -v --version Print the program version informatoin.
  102. // c. -p --parms Print the program parameter values.
  103. //
  104. cmPoRC_t cmPgmOptInstallChar(cmPgmOptH_t h, unsigned numId, cmChar_t charId, const cmChar_t* worldId, unsigned flags, cmChar_t dfltVal, cmChar_t* retValPtr, unsigned cnt, const cmChar_t* helpStr );
  105. cmPoRC_t cmPgmOptInstallBool(cmPgmOptH_t h, unsigned numId, cmChar_t charId, const cmChar_t* worldId, unsigned flags, bool dfltVal, bool* retValPtr, unsigned cnt, const cmChar_t* helpStr );
  106. cmPoRC_t cmPgmOptInstallInt( cmPgmOptH_t h, unsigned numId, cmChar_t charId, const cmChar_t* worldId, unsigned flags, int dfltVal, int* retValPtr, unsigned cnt, const cmChar_t* helpStr );
  107. cmPoRC_t cmPgmOptInstallUInt(cmPgmOptH_t h, unsigned numId, cmChar_t charId, const cmChar_t* worldId, unsigned flags, unsigned dfltVal, unsigned* retValPtr, unsigned cnt, const cmChar_t* helpStr );
  108. cmPoRC_t cmPgmOptInstallDbl( cmPgmOptH_t h, unsigned numId, cmChar_t charId, const cmChar_t* worldId, unsigned flags, double dfltVal, double* retValPtr, unsigned cnt, const cmChar_t* helpStr );
  109. cmPoRC_t cmPgmOptInstallStr( cmPgmOptH_t h, unsigned numId, cmChar_t charId, const cmChar_t* worldId, unsigned flags, const cmChar_t* dfltVal, const cmChar_t** retValPtr, unsigned cnt, const cmChar_t* helpStr );
  110. cmPoRC_t cmPgmOptInstallEnum(cmPgmOptH_t h, unsigned numId, cmChar_t charId, const cmChar_t* worldId, unsigned flags, unsigned enumId, unsigned dfltVal, unsigned* retValPtr, unsigned cnt, const cmChar_t* helpStr );
  111. // Parse a set of command line arguments.
  112. cmPoRC_t cmPgmOptParse( cmPgmOptH_t h, unsigned argCnt, char* argArray[] );
  113. // Get the total count of arguments passed to cmPgmOptParse().
  114. unsigned cmPgmOptArgCount( cmPgmOptH_t h);
  115. // Get the numeric id associated with each argument.
  116. unsigned cmPgmOptNumId( cmPgmOptH_t h, unsigned argIdx );
  117. // Manually convert each argument string into the specified type.
  118. // These functions are useful if all of the parameters were defined using cmPgmOptInstallStr().
  119. // Use cmPgmOptRC() to check for errors.
  120. char cmPgmOptParseArgChar(cmPgmOptH_t h, unsigned argIdx );
  121. bool cmPgmOptParseArgBool(cmPgmOptH_t h, unsigned argIdx );
  122. int cmPgmOptParseArgInt( cmPgmOptH_t h, unsigned argIdx );
  123. unsigned cmPgmOptParseArgUInt(cmPgmOptH_t h, unsigned argIdx );
  124. double cmPgmOptParseArgDbl( cmPgmOptH_t h, unsigned argIdx );
  125. const char* cmPgmOptParseArgStr( cmPgmOptH_t h, unsigned argIdx );
  126. // Get the count of arg's for a given parameter.
  127. unsigned cmPgmOptParmArgCount( cmPgmOptH_t h, unsigned numId );
  128. // Get the value associated with each parsed argument.
  129. // If no argument was given for the requested parameter
  130. // (cmPgmOptParmArgCount(numId)==0) and 'instIdx' == 0 then the default value is returned.
  131. // Use cmPgOptRC() to check for errors.
  132. //
  133. // The parameter identified by numId must has been defined by an earlier call to
  134. // cmPgmOptInstallChar() or this function
  135. char cmPgmOptArgChar( cmPgmOptH_t h, unsigned numId, unsigned instIdx );
  136. // No matter the type of the parameter it will be converted to a bool.
  137. bool cmPgmOptArgBool( cmPgmOptH_t h, unsigned numId, unsigned instIdx );
  138. // All types, except strings, are converted to type int. Doubles are rounded.
  139. int cmPgmOptArgInt( cmPgmOptH_t h, unsigned numId, unsigned instIdx );
  140. // All types, except strings, are converted to type unsigned. Doubles are rounded.
  141. unsigned cmPgmOptArgUInt( cmPgmOptH_t h, unsigned numId, unsigned instIdx );
  142. // All types except strings, are converted to double.
  143. double cmPgmOptArgDbl( cmPgmOptH_t h, unsigned numId, unsigned instIdx );
  144. // If the parameter is not defined as a string then the arg. string value us returned.
  145. const char* cmPgmOptArgStr( cmPgmOptH_t h, unsigned numId, unsigned instIdx );
  146. // Get and set the current result code.
  147. cmPoRC_t cmPgmOptRC( cmPgmOptH_t h, cmPoRC_t rc );
  148. // Returns 'true' only if non- built-in options were selected
  149. bool cmPgmOptHandleBuiltInActions( cmPgmOptH_t h, cmRpt_t* rpt );
  150. void cmPgmOptPrintHelp( cmPgmOptH_t h, cmRpt_t* rpt );
  151. void cmPgmOptPrintVersion( cmPgmOptH_t h, cmRpt_t* rpt );
  152. void cmPgmOptPrintParms( cmPgmOptH_t h, cmRpt_t* rpt );
  153. //)
  154. //}
  155. #ifdef __cplusplus
  156. }
  157. #endif
  158. #endif