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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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v_12_10
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allison
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arglist2.cpp
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C/C++ Source or Header
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1994-09-06
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1KB
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53 lines
LISTING 16
#include <fstream.h>
#include <cstring.h>
#include "arglist2.h"
Arglist::Arglist(size_t arg_count, char **arg_vec)
{
args = new string[arg_count];
available = arg_count;
used = 0;
// INVARIANT: available+used == amount allocated
for (int i = 0; i < arg_count; ++i)
if (arg_vec[i][0] == '@')
expand(arg_vec[i]+1);
else
add(arg_vec[i]);
}
Arglist::~Arglist()
{
delete [] args;
}
void Arglist::expand(char *fname)
{
ifstream f(fname);
const size_t BUFSIZ = 64;
char token[BUFSIZ];
while (f >> token)
if (token[0] == '@')
expand(token+1);
else
add(token);
}
void Arglist::add(char *arg)
{
if (!available)
{
/* Grow argument list */
string *new_args = new string[used + CHUNK];
for (int i = 0; i < used; ++i)
new_args[i] = args[i];
args = new_args;
available = CHUNK;
}
args[used++] = arg;
--available;
}