1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/* This program expands the input file several times. This
* is done in order to obtain large (and maybe huge) files for
* testing. Note that the input file is stored in memory. It's
* last line must properly be terminated.
* Max input line size is 10K.
*
* command line options:
* -f file to be used for input (else stdin)
* -c number of times the file is to be copied
* -n add line numbers (default: off)
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
/* input file is stored in a single-linked list */
struct line {
struct line *next;
char *ln;
} *root, *tail;
static FILE *fpIn;
static FILE *fpOut;
static int nCopies = 1;
static int linenbrs = 0;
/* read the input file and create in-memory representation
*/
static inline void
readFile()
{
char *r;
char lnBuf[10240];
struct line *node;
root = tail = NULL;
r = fgets(lnBuf, sizeof(lnBuf), fpIn);
while(r != NULL) {
node = malloc(sizeof(struct line));
if(node == NULL) {
perror("malloc node");
exit(1);
}
node->next = NULL;
node->ln = strdup(lnBuf);
if(node->ln == NULL) {
perror("malloc node");
exit(1);
}
if(tail == NULL) {
tail = root = node;
} else {
tail->next = node;
tail = node;
}
r = fgets(lnBuf, sizeof(lnBuf), fpIn);
}
if(!feof(fpIn)) {
perror("fgets");
fprintf(stderr, "end of read loop, but not end of file!");
exit(1);
}
}
static void
genCopies()
{
int i;
long long unsigned lnnbr;
struct line *node;
lnnbr = 0;
for(i = 0 ; i < nCopies ; ++i) {
if(i % 1000 == 0)
printf("In copyrun %d\n", i);
for(node = root ; node != NULL ; node = node->next) {
if(linenbrs)
fprintf(fpOut, "%12.12llu:%s", lnnbr, node->ln);
else
fprintf(fpOut, "%s", node->ln);
++lnnbr;
}
}
}
void main(int argc, char *argv[])
{
int opt;
fpIn = stdin;
fpOut = stdout;
while((opt = getopt(argc, argv, "i:o:c:n")) != -1) {
switch (opt) {
case 'i': /* input file */
if((fpIn = fopen(optarg, "r")) == NULL) {
perror(optarg);
exit(1);
}
break;
case 'o': /* output file */
if((fpOut = fopen(optarg, "w")) == NULL) {
perror(optarg);
exit(1);
}
break;
case 'c':
nCopies = atoi(optarg);
break;
case 'n':
linenbrs = 1;
break;
default: printf("invalid option '%c' or value missing - terminating...\n", opt);
exit (1);
break;
}
}
readFile();
genCopies();
}
|
