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// Written by retoor@molodetz.nl
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// This source code extracts URLs from an input string and replaces them inline with their respective content in Markdown style.
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// Imports used: regex.h for regular expression operations, http.h and url.h for HTTP and URL-related utility functions.
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// MIT License
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#include <regex.h>
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#include "http.h"
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#include "url.h"
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void extract_urls(const char *input, char **urls, int *url_count) {
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const char *pattern = "https?://[^ ]+";
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regex_t regex;
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regcomp(®ex, pattern, REG_EXTENDED);
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regmatch_t match;
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const char *cursor = input;
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*url_count = 0;
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while (!regexec(®ex, cursor, 1, &match, 0)) {
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int length = match.rm_eo - match.rm_so;
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urls[*url_count] = strndup(cursor + match.rm_so, length);
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cursor += match.rm_eo;
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(*url_count)++;
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}
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regfree(®ex);
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}
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void inplace_urls_markdown_style(char *input, char **urls, char **contents, int url_count) {
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for (int i = 0; i < url_count; i++) {
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char *found = strstr(input, urls[i]);
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if (found) {
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char *new_text = (char *)malloc(strlen(input) + strlen(contents[i]) - strlen(urls[i]) + 1);
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strncpy(new_text, input, found - input);
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new_text[found - input] = '\0';
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strcat(new_text, contents[i]);
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strcat(new_text, found + strlen(urls[i]));
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free(input);
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input = new_text;
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}
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}
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} |