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max.c
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C/C++ Source or Header
|
1992-05-06
|
2KB
|
87 lines
/**
| "Quick and Dirty" program - MAX <filename> scans filename
| and prints on stdout the length of the longest line, and
| information about non-printable characters eventually
| present in <filename>. MLO 910505
**/
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#define BUFFER_LEN 256
#define INFO_DIM 128
int nFound = 0;
char found[INFO_DIM] = "";
long cFound[INFO_DIM];
void PutInfo(int c);
main(
int argc,
char **argv
){
FILE *fp;
char buffer[BUFFER_LEN];
char *pc;
int n, i, j;
int max = 0;
int tot_lines = 0;
long tot_bytes = 0;
if (argc != 2) exit(0);
if ((fp = fopen(*(++argv), "r")) == NULL) {
fprintf(stderr, "Can't open file %s...\n\n", *argv);
} else {
while (fgets(buffer, BUFFER_LEN, fp) != NULL) {
if ((n = strlen(buffer)) > max) max = n;
tot_lines++;
n--;
for (pc=buffer; *pc; pc++) {
if (!isprint(*pc) && *pc != '\t' && *pc != '\n') {
PutInfo(*pc);
}
}
tot_bytes += (n - 1);
}
fclose(fp);
fprintf(stdout,
"\nFile: %s\n"
"%d characters in %d lines;\n"
"maximum line length is %d characters.\n",
*argv, tot_bytes, tot_lines, max);
if (nFound) {
fprintf(stdout, "\n%d unprintable characters found:\n", nFound);
for (i=0; found[i]; i++) {
fprintf(stdout, "0x%02X ", found[i]);
if (isprint( (j = found[i] + 0x40))) {
fprintf(stdout, "(CTRL-%c): ", j);
} else {
fprintf(stdout, " : ");
}
fprintf(stdout, "%d\n", cFound[i]);
}
}
fprintf(stdout, "\n");
}
exit(0);
}
void PutInfo(
int c
){
char *pC;
if ( (pC = strchr(found, c)) == NULL) {
if (nFound == INFO_DIM) {
fprintf(stderr, "Too few characters in info buffer!\n");
} else {
found[nFound] = c;
cFound[nFound++] = 1;
}
} else {
(cFound[pC - found])++;
}
}