initial: modular iptv-dl with runtime config from ~/.iptv-downloader/config.json

json.c

@@ -0,0 +1,116 @@
+#include "json.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+char *json_str(const char *json, const char *key) {
+    if (!json || !key) return NULL;
+    char needle[128]; snprintf(needle, sizeof(needle), "\"%s\"", key);
+    const char *p = strstr(json, needle);
+    if (!p) return NULL;
+    p += strlen(needle);
+    while (*p == ' ' || *p == ':') p++;
+    if (*p == '"') {
+        p++;
+        const char *end = p;
+        while (*end && !(*end == '"' && *(end-1) != '\\')) end++;
+        size_t len = end - p;
+        char *r = malloc(len+1); memcpy(r, p, len); r[len] = 0; return r;
+    }
+    const char *end = p;
+    while (*end && *end != ',' && *end != '}' && *end != ']') end++;
+    size_t len = end - p;
+    char *r = malloc(len+1); memcpy(r, p, len); r[len] = 0; return r;
+}
+
+char **json_array(const char *json, int *n) {
+    *n = 0;
+    if (!json) return NULL;
+    const char *p = json;
+    while (*p && *p != '[') p++;
+    if (!*p) return NULL;
+    p++;
+    int cap = 64;
+    char **arr = malloc(cap * sizeof(char*));
+    int depth = 0; const char *obj_start = NULL; int in_str = 0;
+    for (; *p; p++) {
+        if (*p == '"' && (p == json || *(p-1) != '\\')) { in_str = !in_str; continue; }
+        if (in_str) continue;
+        if (*p == '{' || *p == '[') { if (depth == 0) obj_start = p; depth++; }
+        else if (*p == '}' || *p == ']') {
+            depth--;
+            if (depth == 0 && obj_start) {
+                size_t len = p - obj_start + 1;
+                char *obj = malloc(len+1); memcpy(obj, obj_start, len); obj[len] = 0;
+                if (*n >= cap) { cap *= 2; arr = realloc(arr, cap*sizeof(char*)); }
+                arr[(*n)++] = obj;
+                obj_start = NULL;
+                if (*p == ']') break;
+            }
+        }
+    }
+    return arr;
+}
+
+void urldecode(char *s) {
+    char *w = s, *r = s;
+    while (*r) {
+        if (*r == '%' && r[1] && r[2]) {
+            char hex[3] = {r[1], r[2], 0}; *w++ = (char)strtol(hex, NULL, 16); r += 3;
+        } else if (*r == '+') { *w++ = ' '; r++; }
+        else { *w++ = *r++; }
+    }
+    *w = 0;
+}
+
+char *qparam(const char *qs, const char *key) {
+    if (!qs || !key) return NULL;
+    char needle[128]; snprintf(needle, sizeof(needle), "%s=", key);
+    const char *p = strstr(qs, needle);
+    if (!p) return NULL;
+    p += strlen(needle);
+    const char *end = strchr(p, '&');
+    size_t len = end ? (size_t)(end-p) : strlen(p);
+    char *r = malloc(len+1); memcpy(r, p, len); r[len] = 0;
+    urldecode(r);
+    return r;
+}
+
+void html_esc(Buf *b, const char *s) {
+    for (; *s; s++) {
+        if      (*s == '<') buf_str(b, "&lt;");
+        else if (*s == '>') buf_str(b, "&gt;");
+        else if (*s == '&') buf_str(b, "&amp;");
+        else if (*s == '"') buf_str(b, "&quot;");
+        else buf_append(b, s, 1);
+    }
+}
+
+void js_esc(Buf *b, const char *s) {
+    for (; *s; s++) {
+        if      (*s == '\'') buf_str(b, "\\'");
+        else if (*s == '\\') buf_str(b, "\\\\");
+        else if (*s == '\n' || *s == '\r') {}
+        else buf_append(b, s, 1);
+    }
+}
+
+void fwrite_json_str(FILE *f, const char *s) {
+    fputc('"', f);
+    for (; *s; s++) {
+        if (*s == '"' || *s == '\\') fputc('\\', f);
+        if ((unsigned char)*s >= 0x20) fputc(*s, f);
+    }
+    fputc('"', f);
+}
+
+int str_icontains(const char *hay, const char *needle) {
+    if (!hay || !needle || !*needle) return 1;
+    char h[2048], n[256];
+    strncpy(h, hay, sizeof(h)-1); h[sizeof(h)-1] = 0;
+    strncpy(n, needle, sizeof(n)-1); n[sizeof(n)-1] = 0;
+    for (char *p = h; *p; p++) if (*p >= 'A' && *p <= 'Z') *p += 32;
+    for (char *p = n; *p; p++) if (*p >= 'A' && *p <= 'Z') *p += 32;
+    return strstr(h, n) != NULL;
+}