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Add coments in Doxygen style and clearify the code

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This commit is contained in:
Ivaylo Ivanov 2018-10-08 15:34:21 +02:00
parent eec12ea2ff
commit e94d16e7ea
1 changed files with 16 additions and 16 deletions
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32
mygrep/mygrep.c
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@ -15,10 +15,10 @@ int main(int argc, char *argv[]) {
char *ofile = NULL;
char *keyword = NULL;
char *filename = NULL;
int c;
int c = getopt(argc, argv, "io:h"); ///< Get the options
// Get the options
while((c = getopt(argc, argv, "io:h")) != -1) {
/// Process the options
while(c != -1) {
switch(c) {
case 'i':
iflag = 1;
@ -39,7 +39,7 @@ int main(int argc, char *argv[]) {
}
}
// Check if the required argument is there
/// Check if the required argument is there
if(argv[optind] == NULL) {
fprintf(stderr, "Mandatory argument 'keyword' missing.\n");
print_usage();
@ -49,28 +49,28 @@ int main(int argc, char *argv[]) {
filename = argv[optind + 1];
}
// Get user input if there is no input file defined
/// Get user input if there is no input file defined
while(filename == NULL) {
size_t len; // Define an unsigned string length value
size_t len; ///< Define an unsigned string length value
if(getline(&filename, &len, stdin)) { // Read until new line
if(getline(&filename, &len, stdin) != -1) { ///< Read until new line
check_for_string(filename, keyword, iflag, ofile);
filename = NULL; // Reset the input
filename = NULL; ///< Reset the input
}
}
// Get data from input file
/// Get data from input file
if(filename != NULL) {
FILE *in;
if((in = fopen(filename, "r")) == NULL) {
FILE *in = fopen(filename, "r");
if(in == NULL) {
fprintf(stderr, "Error opening the file %s\n", filename);
exit(EXIT_FAILURE);
}
size_t len;
char *line = NULL; // Define a pointer to hold our value
char *line = NULL; ///< Define a pointer to hold our value
// Read the file line by line and execute check_for_string for each line
/// Read the file line by line and execute check_for_string for each line
while(getline(&line, &len, in) != -1) {
check_for_string(line, keyword, iflag, ofile);
}
@ -132,10 +132,10 @@ static void check_for_string(char *to_check, char *to_find, int iflag, char *ofi
* If found, append haystack to the end of the file
* Close the file
**/
FILE *out;
FILE *out = fopen(ofile, "a");
// Check if the file was opened successfully
if((out = fopen(ofile, "a")) == NULL) {
/// Check if the file was opened successfully
if(out == NULL) {
fprintf(stderr, "Error opening the file %s\n", ofile);
exit(EXIT_FAILURE);
}