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#include <stdio.h> |
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#include <stdlib.h> |
| 3 |
#include <string.h> |
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|
| 5 |
#define STR_BUFFER_SIZE 500 |
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|
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// ******************************************************* |
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// Uncomment the following two tyedefs to support multiple |
| 9 |
// input files |
| 10 |
// ******************************************************* |
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|
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typedef struct{ |
| 13 |
char fileName[STR_BUFFER_SIZE]; |
| 14 |
FILE* filePtr; |
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} fileStruct; |
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|
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typedef struct linkedNameTag { |
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char name[STR_BUFFER_SIZE]; |
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struct linkedNameTag* next; |
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} linkedName; |
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|
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// ******************************************************* |
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// end multiple file support |
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// ******************************************************* |
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|
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|
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char *programName; /*the name of the program */ |
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void usage(void); |
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|
| 30 |
int main(argC, argV) |
| 31 |
int argC; |
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char *argV[]; |
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{ |
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int i,j; // loop counters |
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|
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char* outPrefix; // the output prefix |
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|
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char* conversionCheck; |
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int conversionError; |
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int optionError; |
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|
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char currentFlag; // used in parsing the flags |
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int done = 0; // multipurpose boolean |
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int havePrefix; // boolean for the output prefix |
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|
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int flag1; |
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char flag1Arg1[STR_BUFFER_SIZE]; |
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char flag1Arg2[STR_BUFFER_SIZE]; |
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int flag2; |
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double flag2Val; |
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int flag3; |
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int rFlag; |
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int iFlag, iVal; |
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|
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// ********************************************************** |
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// to support single or multiple input files, uncomment the |
| 57 |
// appropriate declarations |
| 58 |
// ********************************************************** |
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// single: |
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|
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char* inName; |
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FILE* inFile; |
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|
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// *********************************************************** |
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// multiple: |
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|
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fileStruct* inputArray; |
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linkedName* headName; |
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linkedName* currentName; |
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int nInputs; |
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|
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// end input file declarations |
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// *********************************************************** |
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|
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|
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|
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// intialize default values |
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|
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|
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// ******************************************** |
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// single input: |
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|
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inName = NULL; |
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inFile = NULL; |
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|
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// ********************************************* |
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// multiple input: |
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|
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nInputs = 0; |
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inputArray = NULL; |
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headName = NULL; |
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currentName = NULL; |
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|
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// end file initialization |
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// ********************************************** |
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|
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|
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|
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outPrefix = NULL; |
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|
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conversionError = 0; |
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optionError = 0; |
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|
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havePrefix = 0; |
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flag1 = 0; |
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flag2 = 0; |
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flag3 = 0; |
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rFlag = 0; |
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iFlag = 0; |
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|
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|
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iVal = 0; |
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|
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|
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|
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// here we set the name of the program need by the usage message |
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programName = argV[0]; |
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|
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|
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for( i = 1; i < argC; i++){ |
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|
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if(argV[i][0] =='-'){ |
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|
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// parse the option |
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|
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if(argV[i][1] == '-' ){ |
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|
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// parse long word options |
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|
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if( !strcmp( argV[i], "--flag1" ) ){ |
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flag1 = 1; // set flag1 to true |
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|
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i++; |
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strcpy( flag1Arg1, argV[i] ); |
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i++; |
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strcpy( flag1Arg2, argV[i] ); |
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} |
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|
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else if( !strcmp( argV[i], "--flag2" ) ){ |
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flag2 = 1; // set the flag2 to true; |
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|
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i++; |
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flag2Val = strtod( argV[i], &conversionCheck ); |
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if( conversionCheck == argV[i] ) conversionError = 1; |
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if( *conversionCheck != '\0' ) conversionError = 1; |
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|
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if( conversionError ){ |
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|
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fprintf( stderr, |
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"Error converting \"%s\" to a double\n", argV[i] ); |
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usage(); |
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exit(0); |
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} |
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|
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} |
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|
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else if( !strcmp( argV[i], "--flag3") ){ |
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flag3 = 1; // set flag3 to be true |
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|
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} |
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|
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// anything else is an error |
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|
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else{ |
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fprintf( stderr, |
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"Invalid option \"%s\"\n", argV[i] ); |
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usage(); |
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exit(0); |
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} |
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} |
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|
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else{ |
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|
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// parse single character options |
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|
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done =0; |
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j = 1; |
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currentFlag = argv[i][j]; |
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while( (current_flag != '\0') && (!done) ){ |
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|
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switch(current_flag){ |
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|
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case 'h': |
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// -h => give the usage help message |
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|
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usage(); |
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exit(0); |
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break; |
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|
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case 'o': |
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// -o <prefix> => the output prefix. |
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|
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j++; |
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currentFlag = argV[i][j]; |
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|
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if( currentFlag != '\0' ) optionError = 1; |
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|
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if( optionError ){ |
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fprintf( stderr, |
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"\n" |
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"The -o flag should end an option sequence.\n" |
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" example: -ro <outname> *NOT* -or <outname>\n" ); |
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usage(); |
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exit(0); |
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} |
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|
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i++; |
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outPrefix = argV[i]; |
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if( outPrefix[0] == '-' ) optionError = 1; |
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|
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if( optionError ){ |
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fprintf( stderr, |
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"\n" |
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"\"%s\" is not a valid out prefix/name.\n" |
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"Out prefix/name should not begin with a dash.\n", |
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outPrefix ); |
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usage(); |
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exit(0); |
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} |
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|
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havePrefix = 1; |
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done = 1; |
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break; |
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|
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|
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|
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case 'r': |
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// the r flag |
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|
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rFlag = 1; // set rflag to true |
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break; |
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|
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case 'i': |
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// -i <int> set <int> to the iVal |
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|
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iFlag = 1; // set iFlag to true |
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j++; |
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currentFlag = argV[i][j]; |
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|
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if( currentFlag != '\0' ) optionError = 1; |
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|
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if( optionError ){ |
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fprintf( stderr, |
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"\n" |
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"The -i flag should end an option sequence.\n" |
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" example: -ri <int> *NOT* -ir <int>\n" ); |
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usage(); |
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exit(0); |
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} |
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|
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i++; |
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iVal = (int)strtol( argV[i], &conversionCheck, 10 ); |
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if( conversionCheck == argV[i] ) conversionError = 1; |
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if( *conversionCheck != '\0' ) conversionError = 1; |
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|
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if( conversionError ){ |
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|
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fprintf( stderr, |
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"Error converting \"%s\" to a int\n", argV[i] ); |
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usage(); |
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exit(0); |
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} |
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|
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done = 1; |
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|
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break; |
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|
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default: |
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|
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(void)fprintf(stderr, |
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"\n" |
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"Bad option \"-%c\"\n", current_flag); |
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usage(); |
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} |
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j++; |
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current_flag = argv[i][j]; |
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} |
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} |
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} |
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|
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else{ |
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|
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|
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// ******************************************************** |
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// for only a single input file, leave this as it is. |
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// ******************************************************** |
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|
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if( inName != NULL ){ |
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fprintf( stderr, |
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"\n" |
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"Error at \"%s\", program does not currently support\n" |
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"more than one input file.\n" |
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"\n", |
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argV[i]); |
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usage(); |
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exit(0); |
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} |
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|
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inName = argvV[i]; |
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|
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// ************************************************************* |
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|
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|
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// ************************************************************ |
| 305 |
// To support more than one input file, uncomment the following |
| 306 |
// section. |
| 307 |
// ************************************************************ |
| 308 |
|
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|
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nInputs++; |
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currentName = (linkedName *) malloc( sizeof( linkedName ) ); |
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if( currentName == NULL ){ |
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fprintf( stderr, |
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"\n" |
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"Ran out of memory\n" ); |
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exit(0); |
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} |
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|
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strcpy( currentName->name, argV[i] ); |
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|
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currentName->next = headName; |
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headName = currentName; |
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|
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// ********************************************************** |
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// end multiple input files |
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// ********************************************************** |
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} |
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} |
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|
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|
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|
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|
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// initialize the input file(s) |
| 334 |
|
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// *********************************************************** |
| 336 |
// single file: |
| 337 |
|
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if(inName == NULL){ |
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|
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fprintf( stderr, |
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"\n" |
| 342 |
"Error, no input file was given\n"); |
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usage(); |
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exit(0); |
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} |
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|
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inFile = fopen( inName, "r" ); |
| 348 |
if( inFile == NULL ){ |
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|
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fprintf( stderr, |
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"\n" |
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"Error trying to open \"%s\" for reading\n", |
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inName ); |
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exit(0); |
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} |
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|
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// ************************************************************** |
| 358 |
// multiple files: |
| 359 |
|
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if( !nInputs ){ |
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|
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fprintf( stderr, |
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"\n" |
| 364 |
"Error, no input files were given\n"); |
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usage(); |
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exit(0); |
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} |
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|
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// create the input array |
| 370 |
|
| 371 |
inputArray = (fileStruct *) calloc( nInputs, sizeof( fileStruct ) ); |
| 372 |
if( inputArray == NULL ){ |
| 373 |
fprintf(stderr, |
| 374 |
"\n" |
| 375 |
"Ran out of memory\n" ); |
| 376 |
exit(0); |
| 377 |
} |
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|
| 379 |
j = nInputs - 1; |
| 380 |
currentName = headName; |
| 381 |
while( currentName != NULL ){ |
| 382 |
|
| 383 |
strcopy( inputArray[j].fileName, currentName->name ); |
| 384 |
inputArray[i].filePtr = NULL; |
| 385 |
j--; |
| 386 |
currentName = currentName->next; |
| 387 |
} |
| 388 |
|
| 389 |
// delete linked list |
| 390 |
|
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while( headName != NULL ){ |
| 392 |
|
| 393 |
currentName = headName; |
| 394 |
headName = currentName->next; |
| 395 |
|
| 396 |
free( currentName ); |
| 397 |
} |
| 398 |
|
| 399 |
|
| 400 |
// open the files for reading |
| 401 |
|
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for(i=0; i<nInputs; i++){ |
| 403 |
|
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inputArray[i].filePtr = fopen( inName, "r" ); |
| 405 |
if( inputArray[i].filePtr == NULL ){ |
| 406 |
|
| 407 |
fprintf( stderr, |
| 408 |
"\n" |
| 409 |
"Error trying to open \"%s\" for reading\n", |
| 410 |
inputArray[i].fileName ); |
| 411 |
exit(0); |
| 412 |
} |
| 413 |
|
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//read and do stuff here |
| 415 |
|
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} |
| 417 |
|
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// ************************************************************* |
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// end file opening |
| 420 |
// ************************************************************* |
| 421 |
|
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|
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|
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// or read files here |
| 425 |
|
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|
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|
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|
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|
| 430 |
// close files when we are done. |
| 431 |
|
| 432 |
// *********************************************************** |
| 433 |
// single: |
| 434 |
|
| 435 |
fclose( inFile ); |
| 436 |
|
| 437 |
// ************************************************************* |
| 438 |
// multiple: |
| 439 |
|
| 440 |
for( i=0; i<nInputs; i++){ |
| 441 |
|
| 442 |
fclose( inputArray[i].filePtr ); |
| 443 |
} |
| 444 |
|
| 445 |
free( inputArray ); // free the input Array if we are done; |
| 446 |
inputArray = NULL; |
| 447 |
|
| 448 |
// ************************************************************ |
| 449 |
// end file closing |
| 450 |
// ************************************************************ |
| 451 |
|
| 452 |
} |
| 453 |
|
| 454 |
|
| 455 |
/*************************************************************************** |
| 456 |
* prints out the usage for the command line arguments, then exits. |
| 457 |
***************************************************************************/ |
| 458 |
|
| 459 |
void usage(){ |
| 460 |
(void)fprintf(stdout, |
| 461 |
"The proper usage is: %s [options] <input_file>\n" |
| 462 |
"\n" |
| 463 |
"Options:\n" |
| 464 |
"\n" |
| 465 |
" short:\n" |
| 466 |
" ------\n" |
| 467 |
" -h Display this message\n" |
| 468 |
" -o <name> The output name/prefix\n" |
| 469 |
" -r the r flag\n" |
| 470 |
" -i <int> set number to <#>\n" |
| 471 |
|
| 472 |
"\n" |
| 473 |
" long:\n" |
| 474 |
" -----\n" |
| 475 |
" --flag1 <arg1> <arg2> does flag 1 for arg1 and 2\n" |
| 476 |
" --flag2 <double> does flag 2 for double\n" |
| 477 |
" --flag3 does flag 3\n" |
| 478 |
|
| 479 |
"\n" |
| 480 |
"\n", |
| 481 |
program_name) |
| 482 |
exit(0); |
| 483 |
} |
