1 /* 2 ******************************************************************************* 3 * 4 * Copyright (C) 2000, International Business Machines 5 * Corporation and others. All Rights Reserved. 6 * 7 ******************************************************************************* 8 * file name: uoptions.h 9 * encoding: US-ASCII 10 * tab size: 8 (not used) 11 * indentation:4 12 * 13 * created on: 2000apr17 14 * created by: Markus W. Scherer 15 * 16 * This file provides a command line argument parser. 17 */ 18 19 #ifndef __UOPTIONS_H__ 20 #define __UOPTIONS_H__ 21 22 #include "unicode/utypes.h" 23 24 /* This should usually be called before calling u_parseArgs */ 25 /*#if defined(OS390) && (U_CHARSET_FAMILY == U_ASCII_FAMILY)*/ 26 /* translate args from EBCDIC to ASCII */ 27 /*# define U_MAIN_INIT_ARGS(argc, argv) __argvtoascii_a(argc, argv)*/ 28 /*#elif defined(XP_MAC_CONSOLE)*/ 29 #if defined(XP_MAC_CONSOLE) 30 # include <console.h> 31 /* Get the arguments from the GUI, since old Macs don't have a console Window. */ 32 # define U_MAIN_INIT_ARGS(argc, argv) argc = ccommand((char***)&argv) 33 #else 34 /* Normally we do nothing. */ 35 # define U_MAIN_INIT_ARGS(argc, argv) 36 #endif 37 38 39 40 /* forward declarations for the function declaration */ 41 struct UOption; 42 typedef struct UOption UOption; 43 44 /* function to be called for a command line option */ 45 typedef int UOptionFn(void *context, UOption *option); 46 47 /* values of UOption.hasArg */ 48 enum { UOPT_NO_ARG, UOPT_REQUIRES_ARG, UOPT_OPTIONAL_ARG }; 49 50 /* structure describing a command line option */ 51 struct UOption { 52 const char *longName; /* "foo" for --foo */ 53 const char *value; /* output placeholder, will point to the argument string, if any */ 54 UOptionFn *optionFn; /* function to be called when this option occurs */ 55 void *context; /* parameter for the function */ 56 char shortName; /* 'f' for -f */ 57 char hasArg; /* enum value: option takes no/requires/may have argument */ 58 char doesOccur; /* boolean for "this one occured" */ 59 }; 60 61 /* macro for an entry in a declaration of UOption[] */ 62 #define UOPTION_DEF(longName, shortName, hasArg) \ 63 { longName, NULL, NULL, NULL, shortName, hasArg, 0 } 64 65 /* ICU Tools option definitions */ 66 #define UOPTION_HELP_H UOPTION_DEF("help", 'h', UOPT_NO_ARG) 67 #define UOPTION_HELP_QUESTION_MARK UOPTION_DEF("help", '?', UOPT_NO_ARG) 68 #define UOPTION_VERBOSE UOPTION_DEF("verbose", 'v', UOPT_NO_ARG) 69 #define UOPTION_QUIET UOPTION_DEF("quiet", 'q', UOPT_NO_ARG) 70 #define UOPTION_VERSION UOPTION_DEF("version", 'V', UOPT_NO_ARG) 71 #define UOPTION_COPYRIGHT UOPTION_DEF("copyright", 'c', UOPT_NO_ARG) 72 73 #define UOPTION_DESTDIR UOPTION_DEF("destdir", 'd', UOPT_REQUIRES_ARG) 74 #define UOPTION_SOURCEDIR UOPTION_DEF("sourcedir", 's', UOPT_REQUIRES_ARG) 75 #define UOPTION_ENCODING UOPTION_DEF("encoding", 'e', UOPT_REQUIRES_ARG) 76 #define UOPTION_ICUDATADIR UOPTION_DEF("icudatadir", 'i', UOPT_REQUIRES_ARG) 77 #define UOPTION_WRITE_JAVA UOPTION_DEF("write-java", 'j', UOPT_OPTIONAL_ARG) 78 #define UOPTION_PACKAGE_NAME UOPTION_DEF("package-name", 'p', UOPT_REQUIRES_ARG) 79 #define UOPTION_BUNDLE_NAME UOPTION_DEF("bundle-name", 'b', UOPT_REQUIRES_ARG) 80 81 /** 82 * C Command line argument parser. 83 * 84 * This function takes the argv[argc] command line and a description of 85 * the program's options in form of an array of UOption structures. 86 * Each UOption defines a long and a short name (a string and a character) 87 * for options like "--foo" and "-f". 88 * 89 * Each option is marked with whether it does not take an argument, 90 * requires one, or optionally takes one. The argument may follow in 91 * the same argv[] entry for short options, or it may always follow 92 * in the next argv[] entry. 93 * 94 * An argument is in the next argv[] entry for both long and short name 95 * options, except it is taken from directly behind the short name in 96 * its own argv[] entry if there are characters following the option letter. 97 * An argument in its own argv[] entry must not begin with a '-' 98 * unless it is only the '-' itself. There is no restriction of the 99 * argument format if it is part of the short name options's argv[] entry. 100 * 101 * The argument is stored in the value field of the corresponding 102 * UOption entry, and the doesOccur field is set to 1 if the option 103 * is found at all. 104 * 105 * Short name options without arguments can be collapsed into a single 106 * argv[] entry. After an option letter takes an argument, following 107 * letters will be taken as its argument. 108 * 109 * If the same option is found several times, then the last 110 * argument value will be stored in the value field. 111 * 112 * For each option, a function can be called. This could be used 113 * for options that occur multiple times and all arguments are to 114 * be collected. 115 * 116 * All options are removed from the argv[] array itself. If the parser 117 * is successful, then it returns the number of remaining non-option 118 * strings (including argv[0]). 119 * argv[0], the program name, is never read or modified. 120 * 121 * An option "--" ends option processing; everything after this 122 * remains in the argv[] array. 123 * 124 * An option string "-" alone is treated as a non-option. 125 * 126 * If an option is not recognized or an argument missing, then 127 * the parser returns with the negative index of the argv[] entry 128 * where the error was detected. 129 * 130 * The OS/400 compiler requires that argv either be "char* argv[]", 131 * or "const char* const argv[]", and it will not accept, 132 * "const char* argv[]" as a definition for main(). 133 * 134 * @param argv This parameter is modified 135 * @param options This parameter is modified 136 */ 137 U_CAPI int U_EXPORT2 138 u_parseArgs(int argc, char* argv[], 139 int optionCount, UOption options[]); 140 141 #endif 142