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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/*
** JGREP.C - A utility to search files for text.
**
** public domain by Jerry Coffin
**
** Link with wildargs.obj (Borland), setargv.obj (Microsoft), _mainX.obj
** (Symantech/Zortech), or wildargX.obj (Watcom) which allows you to pass
** wildcards on the command line.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <ctype.h>
#define LINELEN 1024
#define BUFSIZE 32767
#if defined(_QC) || defined(_MSC_VER)
void _cdecl _setenvp(void) {}
void _cdecl _nullcheck(void) {}
#endif
enum { FALSE, TRUE };
typedef unsigned char uchar;
static size_t table[UCHAR_MAX+1];
static size_t len;
static char *string=NULL;
void init_find(char *new_string)
{
size_t i;
if (NULL != string)
free(string);
string = strdup(new_string);
len = strlen(string);
for (i=0;i<=UCHAR_MAX;i++)
table[i]=len;
for (i=0;i<len;i++)
table[string[i]]=len-i-1;
}
char *find_case(char *string2)
{
size_t limit = strlen(string2);
size_t shift;
size_t pos=len-1;
char *here;
while (pos < limit)
{
while( pos < limit && (shift=table[(uchar)string2[pos]])>0)
pos+=shift;
if (0==shift)
{
if (!memcmp(string,here=string2+pos-len+1,len))
return(here);
else pos++;
}
}
return NULL;
}
char *find_no_case(char *string2)
{
size_t limit = strlen(string2);
size_t shift;
size_t pos=len-1;
char *here;
while (pos < limit)
{
while( pos < limit &&
(shift=table[(uchar)toupper(string2[pos])])>0)
{
pos+=shift;
}
if (0==shift)
{
if (!memicmp(string,here=string2+pos-len+1,len))
return(here);
else pos++;
}
}
return NULL;
}
char *( *find) (char *)=find_case;
int _cdecl main(int argc, char **argv)
{
int k, first;
unsigned line;
int line_numbers=FALSE, reverse=FALSE, print_file_name=FALSE;
int no_case = TRUE;
char line_buffer[LINELEN],*string,c;
FILE *infile=NULL;
static char buffer[BUFSIZE];
while ((c=argv[1][0])=='/' || c=='-')
{
switch(tolower(argv[1][1]))
{
case 'c':
case 'y':
no_case=FALSE;
break;
case 'f':
print_file_name=TRUE;
case 'n':
line_numbers=TRUE;
break;
case 'v':
reverse = TRUE;
break;
default:
fprintf(stderr,"unknown switch -%c",argv[1][1]);
}
argv++;
argc--;
}
if (argc < 3)
{
fprintf(stderr ,"\nsyntax: find [-c|y][-n][-v][-f] "
"string filename ..."
"\n\t-c | -y : make case significant ('c' != 'C')"
"\n\t-n : number lines"
"\n\t-f : place file name before lines ( forces -n)"
"\n\t-v : print lines that don't match"
"\n - by itself to read from standard input");
return(1);
}
string=argv[1];
if (no_case)
{
strupr(string);
find=find_no_case;
}
init_find(string);
for (k=2;k<argc;k++)
{
if (infile != NULL)
fclose(infile);
if ((infile=fopen(argv[k],"r"))==NULL)
continue;
first=TRUE;
setvbuf(infile,buffer,_IOFBF,BUFSIZE);
line=0;
while (fgets(line_buffer,LINELEN,infile)!=NULL)
{
line ++;
if ((NULL!=find(line_buffer)) ^ reverse)
{
if (first && !print_file_name )
{
printf("\n\t%s:\n",argv[k]);
first = FALSE;
}
if (print_file_name)
printf(" %s ",argv[k]);
if (line_numbers)
printf("%d:",line);
printf("%s",line_buffer);
}
}
}
return 0;
}
|
