123 lines
4.4 KiB
C
123 lines
4.4 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 2000, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: uoptions.c
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2000apr17
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* created by: Markus W. Scherer
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*
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* This file provides a command line argument parser.
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*/
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#include "unicode/utypes.h"
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#include "cstring.h"
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#include "uoptions.h"
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U_CAPI int U_EXPORT2
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u_parseArgs(int argc, char* argv[],
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int optionCount, UOption options[]) {
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char *arg;
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int i=1, remaining=1;
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char c, stopOptions=0;
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while(i<argc) {
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arg=argv[i];
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if(!stopOptions && *arg=='-' && (c=arg[1])!=0) {
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/* process an option */
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UOption *option=NULL;
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arg+=2;
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if(c=='-') {
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/* process a long option */
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if(*arg==0) {
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/* stop processing options after "--" */
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stopOptions=1;
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} else {
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/* search for the option string */
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int j;
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for(j=0; j<optionCount; ++j) {
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if(uprv_strcmp(arg, options[j].longName)==0) {
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option=options+j;
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break;
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}
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}
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if(option==NULL) {
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/* no option matches */
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return -i;
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}
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option->doesOccur=1;
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if(option->hasArg!=UOPT_NO_ARG) {
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/* parse the argument for the option, if any */
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if(i+1<argc && !(argv[i+1][0]=='-' && argv[i+1][1]!=0)) {
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/* argument in the next argv[], and there is not an option in there */
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option->value=argv[++i];
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} else if(option->hasArg==UOPT_REQUIRES_ARG) {
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/* there is no argument, but one is required: return with error */
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return -i;
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}
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}
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}
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} else {
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/* process one or more short options */
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do {
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/* search for the option letter */
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int j;
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for(j=0; j<optionCount; ++j) {
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if(c==options[j].shortName) {
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option=options+j;
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break;
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}
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}
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if(option==NULL) {
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/* no option matches */
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return -i;
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}
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option->doesOccur=1;
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if(option->hasArg!=UOPT_NO_ARG) {
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/* parse the argument for the option, if any */
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if(*arg!=0) {
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/* argument following in the same argv[] */
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option->value=arg;
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/* do not process the rest of this arg as option letters */
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break;
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} else if(i+1<argc && !(argv[i+1][0]=='-' && argv[i+1][1]!=0)) {
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/* argument in the next argv[], and there is not an option in there */
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option->value=argv[++i];
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/* this break is redundant because we know that *arg==0 */
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break;
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} else if(option->hasArg==UOPT_REQUIRES_ARG) {
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/* there is no argument, but one is required: return with error */
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return -i;
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}
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}
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/* get the next option letter */
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option=NULL;
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c=*arg++;
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} while(c!=0);
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}
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if(option!=0 && option->optionFn!=0 && option->optionFn(option->context, option)<0) {
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/* the option function was called and returned an error */
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return -i;
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}
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/* go to next argv[] */
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++i;
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} else {
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/* move a non-option up in argv[] */
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argv[remaining++]=arg;
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++i;
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}
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}
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return remaining;
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}
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