Created `src` dir for code, added Makefile

1 files changed, 175 insertions, 0 deletions

diff --git a/src/headers/kat.h b/src/headers/kat.h
new file mode 100644
index 0000000..f5a3a00
--- /dev/null
+++ b/src/headers/kat.h
@@ -0,0 +1,175 @@
+// kat.cfg (kat.h)
+// with love by czjstmax <jstmaxlol@disroot.org>
+// header version 2
+
+#pragma once
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#ifndef KAT
+#define KAT
+
+struct kat_api {
+    int (*create)(const char*);
+    int (*add)(const char*, const char*, const char*);
+    int (*read)(const char*, const char*, char*, size_t);
+    int (*del)(const char*, const char*);
+    int (*edit)(const char*, const char*, const char*);
+    int (*addComment)(const char*, const char*);
+};
+
+// Creates a file
+static inline int katcreate(const char *path) {
+    FILE *f = fopen(path, "w");
+    if (!f) return 1;
+    fclose(f);
+    return 0; // success
+}
+
+// Appends a key=val to file
+static inline int katadd(const char *key, const char *val, const char *path) {
+    FILE *f = fopen(path, "a");
+    if (f) {
+        fprintf(f, "%s=%s\n", key, val);
+        fclose(f);
+        return 0;
+    }
+    return 1;
+}
+
+// Appends a comment to file
+static inline int kataddcomment(const char *str, const char *path) {
+    FILE *f = fopen(path, "a");
+    if (f) {
+        fprintf(f, "#%s\n", str);
+        fclose(f);
+        return 0;
+    }
+    return 1;
+}
+
+// Reads a key from file
+static inline int katreadkey(const char *key, const char *path, char *buffer, size_t bufsize) {
+    FILE *f = fopen(path, "r");
+    if (!f) return 1;
+
+    char line[1024];
+    size_t key_len = strlen(key);
+
+    while (fgets(line, sizeof(line), f)) {
+        // TODO: skip leading whitespace maybe?
+        // check if line starts with key and '=' right after
+        if (strncmp(line, key, key_len) == 0 && line[key_len] == '=') {
+            if (line[0] == '#' || line[0] == ';' || line[0] == '\n') continue;
+            // copy everything after '=' until newline or buffer full (aka bad)
+            char *val_start = line + key_len + 1;
+            size_t len = strcspn(val_start, "\r\n"); // length until newline
+            if (len >= bufsize) len = bufsize - 1;
+            strncpy(buffer, val_start, len);
+            buffer[len] = '\0';
+            fclose(f);
+            return 0;  // success
+        }
+    }
+
+    fclose(f);
+    return 1;
+}
+
+// Deletes a key from file
+static inline int katdelkey(const char *key, const char *path) {
+    FILE *f = fopen(path, "r");
+    if (!f) return 1;
+
+    char temp_path[1024];
+    snprintf(temp_path, sizeof(temp_path), "%s.tmp", path);
+    FILE *temp = fopen(temp_path, "w");
+    if (!temp) {
+        fclose(f);
+        return 1;
+    }
+
+    char line[1024];
+    size_t key_len = strlen(key);
+    int deleted = 0;
+
+    while (fgets(line, sizeof(line), f)) {
+        // skip line if it matches 'key='
+        if (strncmp(line, key, key_len) == 0 && line[key_len] == '=') {
+            deleted = 1;
+            continue;
+        }
+        fputs(line, temp);
+    }
+
+    fclose(f);
+    fclose(temp);
+
+    if (deleted) {
+        // replace original file with temp
+        if (remove(path) != 0) return 1;
+        if (rename(temp_path, path) != 0) return 1;
+    } else {
+        remove(temp_path);
+    }
+
+    return deleted ? 0 : 1; // 0 if deleted, 1 if not found
+}
+
+// Edits a key's value from file
+static inline int kateditkey(const char *key, const char *new_val, const char *path) {
+    FILE *f = fopen(path, "r");
+    if (!f) return 1;
+
+    char temp_path[1024];
+    snprintf(temp_path, sizeof(temp_path), "%s.tmp", path);
+    FILE *temp = fopen(temp_path, "w");
+    if (!temp) {
+        fclose(f);
+        return 1;
+    }
+
+    char line[1024];
+    size_t key_len = strlen(key);
+    int found = 0;
+
+    while (fgets(line, sizeof(line), f)) {
+        // skip leading whitespace for accurate matching
+        char *start = line;
+        while (*start == ' ' || *start == '\t') start++;
+
+        if (strncmp(start, key, key_len) == 0 && start[key_len] == '=') {
+            // replace line with new key=val
+            fprintf(temp, "%s=%s\n", key, new_val);
+            found = 1;
+        } else {
+            fputs(line, temp);
+        }
+    }
+
+    if (!found) {
+        // key not found, add it at the end
+        fprintf(temp, "%s=%s\n", key, new_val);
+    }
+
+    fclose(f);
+    fclose(temp);
+
+    if (remove(path) != 0) return 1;
+    if (rename(temp_path, path) != 0) return 1;
+
+    return 0;
+}
+
+struct kat_api kat = {
+    .create = katcreate,
+    .add = katadd,
+    .read = katreadkey,
+    .del = katdelkey,
+    .edit = kateditkey,
+    .addComment = kataddcomment,
+};
+
+#endif