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/*
** This program checks for formatting problems in source code:
**
** * Any use of tab characters
** * White space at the end of a line
** * Blank lines at the end of a file
**
** Any violations are reported.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define CR_OK 0x001
#define WSEOL_OK 0x002
static void checkSpacing(const char *zFile, unsigned flags){
FILE *in = fopen(zFile, "rb");
int i;
int seenSpace;
int seenTab;
int ln = 0;
int lastNonspace = 0;
char zLine[2000];
if( in==0 ){
printf("cannot open %s\n", zFile);
return;
}
while( fgets(zLine, sizeof(zLine), in) ){
seenSpace = 0;
seenTab = 0;
ln++;
for(i=0; zLine[i]; i++){
if( zLine[i]=='\t' && seenTab==0 ){
printf("%s:%d: tab (\\t) character\n", zFile, ln);
seenTab = 1;
}else if( zLine[i]=='\r' ){
if( (flags & CR_OK)==0 ){
printf("%s:%d: carriage-return (\\r) character\n", zFile, ln);
}
}else if( zLine[i]==' ' ){
seenSpace = 1;
}else if( zLine[i]!='\n' ){
lastNonspace = ln;
seenSpace = 0;
}
}
if( seenSpace && (flags & WSEOL_OK)==0 ){
printf("%s:%d: whitespace at end-of-line\n", zFile, ln);
}
}
fclose(in);
if( lastNonspace<ln ){
printf("%s:%d: blank lines at end of file (%d)\n",
zFile, ln, ln - lastNonspace);
}
}
int main(int argc, char **argv){
int i;
unsigned flags = WSEOL_OK;
for(i=1; i<argc; i++){
const char *z = argv[i];
if( z[0]=='-' ){
while( z[0]=='-' ) z++;
if( strcmp(z,"crok")==0 ){
flags |= CR_OK;
}else if( strcmp(z, "wseol")==0 ){
flags &= ~WSEOL_OK;
}else if( strcmp(z, "help")==0 ){
printf("Usage: %s [options] FILE ...\n", argv[0]);
printf(" --crok Do not report on carriage-returns\n");
printf(" --wseol Complain about whitespace at end-of-line\n");
printf(" --help This message\n");
}else{
printf("unknown command-line option: [%s]\n", argv[i]);
printf("use --help for additional information\n");
}
}else{
checkSpacing(argv[i], flags);
}
}
return 0;
}
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