isWhiteSpace.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define URL_PROMPT "URL:"
#define MAX_BUFFER 256000

char *addressFinder(const char *sPtr, const char *word);
int instanceCounter(const char *ptr, const char *w);
void printPointerDifference(const char *p1, const char *p2, int diff);
void instanceTag(const char *ptr, const char *w);
char *isWhiteSpace (const char *space);

int main(void) {
	char curl[BUFSIZ + 1] = "curl -s ";
	char urlContent[MAX_BUFFER];
	char buffer[BUFSIZ + 1];
	FILE* fp;

	// grader thing
	setvbuf(stdout, NULL, _IONBF, 0);

	// let's prompt for the url and save it
	printf("%s http://wfs.sbcc.edu/staff/nfguebels/web/cs137/html_src_list/simple.html\n", URL_PROMPT);
	fgets(buffer, BUFSIZ, stdin);

	// fgets always ends with '\n' so let's change it to '\0'
	buffer[strlen(buffer) - 1] = '\0';

	// let's concatenate the curl command with the variable url
	strcat(curl, buffer);

	// check for debugging
//	printf("%s\n", curl);

// let's store the content of the html document into fp
	fp = popen(curl, "r");

	if (fp != NULL) {
		while (fgets(buffer, BUFSIZ, fp) != NULL) {
//		let's concatenate the contents of this file line by line
			strcat(urlContent, buffer);
		}

		// remove contents of buffer
		buffer[0] = '\0';

		pclose(fp);

		printf("%s", urlContent);

		do {
			printf("Ready\n");

			fgets(buffer, BUFSIZ, stdin);
//			buffer[strlen(buffer) - 1] = '\0';

			switch (buffer[0]) {
			case 'c':
				printf("%d\n", instanceCounter(urlContent, "src=\""));
				break;
			case 't':
				instanceTag(urlContent, "src=\"");
				break;
			case 'u':
				instanceTag(urlContent, "src=\"");
				break;
			case 'f':
				instanceTag(urlContent, "src=\"");
				break;
			}
		} while (buffer[0] != 'q');

	} else {
		printf("File didn't load. Sorry");
	}

	printf("Complete");

	return EXIT_SUCCESS;
}

char *addressFinder(const char *sPtr, const char *word) {
	sPtr = strstr(sPtr, word);

	return sPtr;
}

int instanceCounter(const char *ptr, const char *w) {
	int count = 0;

	while (ptr = addressFinder(ptr, w)) {
		if (isspace(*(--ptr))) {
			count++;
		}
		ptr += 2;
	}

	return count;
}

void instanceTag(const char *ptr, const char *w) {
	const char *temp1;
	const char *temp2;
//	int repeat = 0;

	while (ptr = addressFinder(ptr, w)) {
//		printf("\n%s\n", "===============");
		temp1 = NULL;
		temp2 = NULL;

		temp1 = ptr;

		if (isspace(*(--temp1))) {
//			printf("Found a %c\n", *temp1);
			while (*(--temp1) != '<') {
//				--temp1;
			}
			if (*temp1 == '<') {
				temp1 += 1;
//				printf("temp1 is %c\n", *(temp1));
				temp2 = temp1;
				temp2 = isWhiteSpace(temp2);
//				temp2 = strchr (temp2, '\n');
//				printf("temp2 is %c\n", *(temp2));
			}
			if (temp2) {
				printPointerDifference(temp1, temp2, (temp2 - temp1));
			}
		} else {
//			printf("Not a ' '\n");
		}

		ptr += 1;
//		printf("%d\n", ++repeat);
	}
}

void printPointerDifference(const char *p1, const char *p2, int diff) {
//	printf("p1 is %c\n", *p1);
//	printf("p2 is %c\n", *p2);
//	printf("diff is %d\n", diff);

	if (diff > 0) {
		char array[diff + 1];

		strncpy(array, p1, diff);
		array[diff] = '\0';

	//	printf("diff is %d\n", diff);
		printf("%s\n", array);
	}
}

void quoteContents () {

}

char *isWhiteSpace (const char *space) {

	while (!isspace(*(++space))) {
//		printf("%c\n", *space);
	}

	return space;
}