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| #include <stdio.h>
#include <ctype.h>
#include <string.h>
void lowercase(char *str)
{
if(str != NULL)
{
char *p;
for(p = str; *p != '\0'; p++)
{
*p = tolower((unsigned) (*p));
}
}
}
void uppercase(char *str)
{
if(str != NULL)
{
char *p;
for(p = str; *p != '\0'; p++)
{
*p = toupper((unsigned) (*p));
}
}
}
int isLow(char const *str)
{
int rv = 0;
if (str != NULL)
{
char const *p;
for (p = str; *p != '\0' && islower((unsigned char) *p); p++)
{
}
rv = (*p == '\0');
}
return rv;
}
int isUpp(char const *str)
{
int rv = 0;
if (str != NULL)
{
char const *p;
for (p = str; *p != '\0' && isupper((unsigned char) *p); p++)
{
}
rv = (*p == '\0');
}
return rv;
}
int main(int argc, char *argv[])
{
FILE *fp;
char buffer[250], *p, fname[15], searchstr[15] ;
int r = 0;
strcpy(fname, argv[argc - 1]);
strcpy(searchstr, argv[argc - 2]);
if(strcmp(argv[1], "-i") != 0)
{
if(argc != 3)
{
printf("Usage : newgrep [-i] searchstr searchfile [-o targetfile]\n");
}
else
{
if((fp = fopen(fname, "r")) == NULL)
{
printf("\n Cannot open file specified.\n");
exit(1);
}
while(fgets(buffer, sizeof(buffer), fp) != NULL)
{
p = strstr(buffer, searchstr);
if(p)
{
uppercase(buffer);
fputs(buffer, stdout);
r++;
}
}
printf("\n Found %s in %i lines.\n", searchstr, r);
}
}
if(strcmp(argv[1], "-i") == 0)
{
if(argc != 4)
{
printf("Usage : newgrep [-i] searchstr searchfile [-o targetfile]\n");
}
else
{
if((fp = fopen(fname, "r")) == NULL)
{
printf("\n Cannot open file specified.\n");
exit(1);
}
if(isUpp(searchstr)) lowercase(searchstr);
while(fgets(buffer, sizeof(buffer), fp) != NULL)
{
p = strstr(buffer, searchstr);
if(p)
{
uppercase(buffer);
fputs(buffer, stdout);
r++;
}
}
printf("\n Found %s in %i lines 00 times.\n", searchstr, r);
}
}
return 0;
} |
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