| 1 |
#include <stdio.h> |
| 2 |
#include <stdlib.h> |
| 3 |
#include <string.h> |
| 4 |
|
| 5 |
#define STR_BUFFER_SIZE 500 |
| 6 |
|
| 7 |
// ******************************************************* |
| 8 |
// Uncomment the following two tyedefs to support multiple |
| 9 |
// input files |
| 10 |
// ******************************************************* |
| 11 |
|
| 12 |
typedef struct{ |
| 13 |
char fileName[STR_BUFFER_SIZE]; |
| 14 |
FILE* filePtr; |
| 15 |
} fileStruct; |
| 16 |
|
| 17 |
typedef struct linkedNameTag { |
| 18 |
char name[STR_BUFFER_SIZE]; |
| 19 |
struct linkedNameTag* next; |
| 20 |
} linkedName; |
| 21 |
|
| 22 |
// ******************************************************* |
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// end multiple file support |
| 24 |
// ******************************************************* |
| 25 |
|
| 26 |
|
| 27 |
char *programName; /*the name of the program */ |
| 28 |
void usage(void); |
| 29 |
|
| 30 |
int main(argC, argV) |
| 31 |
int argC; |
| 32 |
char *argV[]; |
| 33 |
{ |
| 34 |
int i,j; // loop counters |
| 35 |
|
| 36 |
char* outPrefix; // the output prefix |
| 37 |
|
| 38 |
char* conversionCheck; |
| 39 |
int conversionError; |
| 40 |
int optionError; |
| 41 |
|
| 42 |
char currentFlag; // used in parsing the flags |
| 43 |
int done = 0; // multipurpose boolean |
| 44 |
int havePrefix; // boolean for the output prefix |
| 45 |
|
| 46 |
int flag1; |
| 47 |
char flag1Arg1[STR_BUFFER_SIZE]; |
| 48 |
char flag1Arg2[STR_BUFFER_SIZE]; |
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int flag2; |
| 50 |
double flag2Val; |
| 51 |
int flag3; |
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int rFlag; |
| 53 |
int iFlag, iVal; |
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|
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// ********************************************************** |
| 56 |
// to support single or multiple input files, uncomment the |
| 57 |
// appropriate declarations |
| 58 |
// ********************************************************** |
| 59 |
// single: |
| 60 |
|
| 61 |
// 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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|
| 67 |
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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flag2Val = 0.0; |
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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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if( i>=argC ){ |
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fprintf( stderr, |
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"\n" |
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"not enough arguments for flag1\n"); |
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usage(); |
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exit(0); |
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} |
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strcpy( flag1Arg1, argV[i] ); |
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|
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i++; |
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if( i>=argC ){ |
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fprintf( stderr, |
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"\n" |
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"not enough arguments for flag1\n"); |
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usage(); |
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exit(0); |
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} |
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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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if( i>=argC ){ |
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fprintf( stderr, |
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"\n" |
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"not enough arguments for flag2\n"); |
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usage(); |
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exit(0); |
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} |
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|
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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( (currentFlag != '\0') && (!done) ){ |
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|
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switch(currentFlag){ |
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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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if( i>=argC ){ |
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fprintf( stderr, |
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"\n" |
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"not enough arguments for -o\n"); |
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usage(); |
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exit(0); |
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} |
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|
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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 |
| 266 |
|
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iFlag = 1; // set iFlag to true |
| 268 |
j++; |
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currentFlag = argV[i][j]; |
| 270 |
|
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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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if( i>=argC ){ |
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fprintf( stderr, |
| 285 |
"\n" |
| 286 |
"not enough arguments for -i\n"); |
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usage(); |
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exit(0); |
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} |
| 290 |
|
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iVal = (int)strtol( argV[i], &conversionCheck, 10 ); |
| 292 |
if( conversionCheck == argV[i] ) conversionError = 1; |
| 293 |
if( *conversionCheck != '\0' ) conversionError = 1; |
| 294 |
|
| 295 |
if( conversionError ){ |
| 296 |
|
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fprintf( stderr, |
| 298 |
"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; |
| 304 |
|
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break; |
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|
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default: |
| 308 |
|
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(void)fprintf(stderr, |
| 310 |
"\n" |
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"Bad option \"-%c\"\n", currentFlag); |
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usage(); |
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} |
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j++; |
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currentFlag = argV[i][j]; |
| 316 |
} |
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} |
| 318 |
} |
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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. |
| 325 |
// ******************************************************** |
| 326 |
|
| 327 |
// if( inName != NULL ){ |
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// fprintf( stderr, |
| 329 |
// "\n" |
| 330 |
// "Error at \"%s\", program does not currently support\n" |
| 331 |
// "more than one input file.\n" |
| 332 |
// "\n", |
| 333 |
// argV[i]); |
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// usage(); |
| 335 |
// exit(0); |
| 336 |
// } |
| 337 |
|
| 338 |
// inName = argV[i]; |
| 339 |
|
| 340 |
// ************************************************************* |
| 341 |
|
| 342 |
|
| 343 |
// ************************************************************ |
| 344 |
// To support more than one input file, uncomment the following |
| 345 |
// section. |
| 346 |
// ************************************************************ |
| 347 |
|
| 348 |
|
| 349 |
nInputs++; |
| 350 |
currentName = (linkedName *) malloc( sizeof( linkedName ) ); |
| 351 |
if( currentName == NULL ){ |
| 352 |
fprintf( stderr, |
| 353 |
"\n" |
| 354 |
"Ran out of memory\n" ); |
| 355 |
exit(0); |
| 356 |
} |
| 357 |
|
| 358 |
strcpy( currentName->name, argV[i] ); |
| 359 |
|
| 360 |
currentName->next = headName; |
| 361 |
headName = currentName; |
| 362 |
|
| 363 |
// ********************************************************** |
| 364 |
// end multiple input files |
| 365 |
// ********************************************************** |
| 366 |
} |
| 367 |
} |
| 368 |
|
| 369 |
|
| 370 |
|
| 371 |
|
| 372 |
// initialize the input file(s) |
| 373 |
|
| 374 |
// *********************************************************** |
| 375 |
// single file: |
| 376 |
|
| 377 |
// if(inName == NULL){ |
| 378 |
|
| 379 |
// fprintf( stderr, |
| 380 |
// "\n" |
| 381 |
// "Error, no input file was given\n"); |
| 382 |
// usage(); |
| 383 |
// exit(0); |
| 384 |
// } |
| 385 |
|
| 386 |
// inFile = fopen( inName, "r" ); |
| 387 |
// if( inFile == NULL ){ |
| 388 |
|
| 389 |
// fprintf( stderr, |
| 390 |
// "\n" |
| 391 |
// "Error trying to open \"%s\" for reading\n", |
| 392 |
// inName ); |
| 393 |
// exit(0); |
| 394 |
// } |
| 395 |
|
| 396 |
// ************************************************************** |
| 397 |
// multiple files: |
| 398 |
|
| 399 |
if( !nInputs ){ |
| 400 |
|
| 401 |
fprintf( stderr, |
| 402 |
"\n" |
| 403 |
"Error, no input files were given\n"); |
| 404 |
usage(); |
| 405 |
exit(0); |
| 406 |
} |
| 407 |
|
| 408 |
// create the input array |
| 409 |
|
| 410 |
inputArray = (fileStruct *) calloc( nInputs, sizeof( fileStruct ) ); |
| 411 |
if( inputArray == NULL ){ |
| 412 |
fprintf(stderr, |
| 413 |
"\n" |
| 414 |
"Ran out of memory\n" ); |
| 415 |
exit(0); |
| 416 |
} |
| 417 |
|
| 418 |
j = nInputs - 1; |
| 419 |
currentName = headName; |
| 420 |
while( currentName != NULL ){ |
| 421 |
|
| 422 |
strcpy( inputArray[j].fileName, currentName->name ); |
| 423 |
inputArray[j].filePtr = NULL; |
| 424 |
j--; |
| 425 |
currentName = currentName->next; |
| 426 |
} |
| 427 |
|
| 428 |
// delete linked list |
| 429 |
|
| 430 |
while( headName != NULL ){ |
| 431 |
|
| 432 |
currentName = headName; |
| 433 |
headName = currentName->next; |
| 434 |
|
| 435 |
free( currentName ); |
| 436 |
} |
| 437 |
|
| 438 |
|
| 439 |
// open the files for reading |
| 440 |
|
| 441 |
for(i=0; i<nInputs; i++){ |
| 442 |
|
| 443 |
inputArray[i].filePtr = fopen( inputArray[i].fileName, "r" ); |
| 444 |
if( inputArray[i].filePtr == NULL ){ |
| 445 |
|
| 446 |
fprintf( stderr, |
| 447 |
"\n" |
| 448 |
"Error trying to open \"%s\" for reading\n", |
| 449 |
inputArray[i].fileName ); |
| 450 |
exit(0); |
| 451 |
} |
| 452 |
|
| 453 |
//read and do stuff here |
| 454 |
|
| 455 |
} |
| 456 |
|
| 457 |
// ************************************************************* |
| 458 |
// end file opening |
| 459 |
// ************************************************************* |
| 460 |
|
| 461 |
|
| 462 |
|
| 463 |
// or read and do stuff here. |
| 464 |
|
| 465 |
|
| 466 |
|
| 467 |
|
| 468 |
|
| 469 |
// close files when we are done. |
| 470 |
|
| 471 |
// *********************************************************** |
| 472 |
// single: |
| 473 |
|
| 474 |
// fclose( inFile ); |
| 475 |
|
| 476 |
// ************************************************************* |
| 477 |
// multiple: |
| 478 |
|
| 479 |
for( i=0; i<nInputs; i++){ |
| 480 |
|
| 481 |
fclose( inputArray[i].filePtr ); |
| 482 |
} |
| 483 |
|
| 484 |
free( inputArray ); // free the input Array if we are done; |
| 485 |
inputArray = NULL; |
| 486 |
|
| 487 |
// ************************************************************ |
| 488 |
// end file closing |
| 489 |
// ************************************************************ |
| 490 |
|
| 491 |
} |
| 492 |
|
| 493 |
|
| 494 |
/*************************************************************************** |
| 495 |
* prints out the usage for the command line arguments, then exits. |
| 496 |
***************************************************************************/ |
| 497 |
|
| 498 |
void usage(){ |
| 499 |
(void)fprintf(stdout, |
| 500 |
"\n" |
| 501 |
"The proper usage is: %s [options] <input_file>\n" |
| 502 |
"\n" |
| 503 |
"Options:\n" |
| 504 |
"\n" |
| 505 |
" short:\n" |
| 506 |
" ------\n" |
| 507 |
" -h Display this message\n" |
| 508 |
" -o <name> The output name/prefix\n" |
| 509 |
" -r the r flag\n" |
| 510 |
" -i <int> set number to <#>\n" |
| 511 |
|
| 512 |
"\n" |
| 513 |
" long:\n" |
| 514 |
" -----\n" |
| 515 |
" --flag1 <arg1> <arg2> does flag 1 for arg1 and 2\n" |
| 516 |
" --flag2 <double> does flag 2 for double\n" |
| 517 |
" --flag3 does flag 3\n" |
| 518 |
|
| 519 |
"\n" |
| 520 |
"\n", |
| 521 |
programName); |
| 522 |
exit(0); |
| 523 |
} |
