1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/intl/icu/source/tools/toolutil/uoptions.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,122 @@
1.4 +/*
1.5 +*******************************************************************************
1.6 +*
1.7 +* Copyright (C) 2000, International Business Machines
1.8 +* Corporation and others. All Rights Reserved.
1.9 +*
1.10 +*******************************************************************************
1.11 +* file name: uoptions.c
1.12 +* encoding: US-ASCII
1.13 +* tab size: 8 (not used)
1.14 +* indentation:4
1.15 +*
1.16 +* created on: 2000apr17
1.17 +* created by: Markus W. Scherer
1.18 +*
1.19 +* This file provides a command line argument parser.
1.20 +*/
1.21 +
1.22 +#include "unicode/utypes.h"
1.23 +#include "cstring.h"
1.24 +#include "uoptions.h"
1.25 +
1.26 +U_CAPI int U_EXPORT2
1.27 +u_parseArgs(int argc, char* argv[],
1.28 + int optionCount, UOption options[]) {
1.29 + char *arg;
1.30 + int i=1, remaining=1;
1.31 + char c, stopOptions=0;
1.32 +
1.33 + while(i<argc) {
1.34 + arg=argv[i];
1.35 + if(!stopOptions && *arg=='-' && (c=arg[1])!=0) {
1.36 + /* process an option */
1.37 + UOption *option=NULL;
1.38 + arg+=2;
1.39 + if(c=='-') {
1.40 + /* process a long option */
1.41 + if(*arg==0) {
1.42 + /* stop processing options after "--" */
1.43 + stopOptions=1;
1.44 + } else {
1.45 + /* search for the option string */
1.46 + int j;
1.47 + for(j=0; j<optionCount; ++j) {
1.48 + if(options[j].longName && uprv_strcmp(arg, options[j].longName)==0) {
1.49 + option=options+j;
1.50 + break;
1.51 + }
1.52 + }
1.53 + if(option==NULL) {
1.54 + /* no option matches */
1.55 + return -i;
1.56 + }
1.57 + option->doesOccur=1;
1.58 +
1.59 + if(option->hasArg!=UOPT_NO_ARG) {
1.60 + /* parse the argument for the option, if any */
1.61 + if(i+1<argc && !(argv[i+1][0]=='-' && argv[i+1][1]!=0)) {
1.62 + /* argument in the next argv[], and there is not an option in there */
1.63 + option->value=argv[++i];
1.64 + } else if(option->hasArg==UOPT_REQUIRES_ARG) {
1.65 + /* there is no argument, but one is required: return with error */
1.66 + return -i;
1.67 + }
1.68 + }
1.69 + }
1.70 + } else {
1.71 + /* process one or more short options */
1.72 + do {
1.73 + /* search for the option letter */
1.74 + int j;
1.75 + for(j=0; j<optionCount; ++j) {
1.76 + if(c==options[j].shortName) {
1.77 + option=options+j;
1.78 + break;
1.79 + }
1.80 + }
1.81 + if(option==NULL) {
1.82 + /* no option matches */
1.83 + return -i;
1.84 + }
1.85 + option->doesOccur=1;
1.86 +
1.87 + if(option->hasArg!=UOPT_NO_ARG) {
1.88 + /* parse the argument for the option, if any */
1.89 + if(*arg!=0) {
1.90 + /* argument following in the same argv[] */
1.91 + option->value=arg;
1.92 + /* do not process the rest of this arg as option letters */
1.93 + break;
1.94 + } else if(i+1<argc && !(argv[i+1][0]=='-' && argv[i+1][1]!=0)) {
1.95 + /* argument in the next argv[], and there is not an option in there */
1.96 + option->value=argv[++i];
1.97 + /* this break is redundant because we know that *arg==0 */
1.98 + break;
1.99 + } else if(option->hasArg==UOPT_REQUIRES_ARG) {
1.100 + /* there is no argument, but one is required: return with error */
1.101 + return -i;
1.102 + }
1.103 + }
1.104 +
1.105 + /* get the next option letter */
1.106 + option=NULL;
1.107 + c=*arg++;
1.108 + } while(c!=0);
1.109 + }
1.110 +
1.111 + if(option!=0 && option->optionFn!=0 && option->optionFn(option->context, option)<0) {
1.112 + /* the option function was called and returned an error */
1.113 + return -i;
1.114 + }
1.115 +
1.116 + /* go to next argv[] */
1.117 + ++i;
1.118 + } else {
1.119 + /* move a non-option up in argv[] */
1.120 + argv[remaining++]=arg;
1.121 + ++i;
1.122 + }
1.123 + }
1.124 + return remaining;
1.125 +}
