stamail

commit 5ab44094c8d9dc2736501ecff5a7bae648759c29
parent c12a9d015ed92c1b16b6e8ffaef2f0cd132860bc
Author: Nathaniel Chappelle <nathaniel@chappelle.dev>
Date:   Sat, 24 Jan 2026 15:10:29 -0800

Callback creates linked list (thread?)

Diffstat:
M
stamail.c
 | 
53
+++++++++++++++++++++++++++++++++++++++++++++++++++--
A
stamail.h
 | 
11
+++++++++++

2 files changed, 62 insertions(+), 2 deletions(-)
diff --git a/stamail.c b/stamail.c
@@ -1,8 +1,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include "json.h"
+#include "stamail.h"
 
-/* Current callback handler */
+/* Callback handler */
+/*
 static void print_message(struct message *m, void *ud) {
     (void)ud;
 
@@ -15,6 +17,33 @@ static void print_message(struct message *m, void *ud) {
     }
     printf("--------------------------------------------------\n");
 }
+*/
+
+static struct message_node *head = NULL;
+static struct message_node *tail = NULL;
+
+/* Current callback handler */
+static void collect_message(struct message *m, void *ud) {
+    (void)ud;
+
+    struct message_node *n = malloc(sizeof(struct message_node));
+    if (!n) {
+        perror("malloc");
+        exit(1);
+    }
+
+    /* shallow copy: pointers still reference JSON buffer */
+    n->m = *m;
+    n->next = NULL;
+
+    if (!head) {
+        head = tail = n;
+    } else {
+        tail->next = n;
+        tail = n;
+    }
+}
+
 
 int main(void) {
     /* Slurp stdin */
@@ -36,9 +65,29 @@ int main(void) {
 
     if (!buf) return 0;
 
-    parse_mail_json(buf, len, print_message, NULL);
+    parse_mail_json(buf, len, collect_message, NULL);
+
+    for (struct message_node *n = head; n; n = n->next) {
+        struct message *m = &n->m;
+
+        printf("Message-ID: %.*s\n", m->id_len, m->id);
+        printf("From:       %.*s\n", m->from_len, m->from);
+        printf("Subject:    %.*s\n", m->subject_len, m->subject);
+        printf("Date:       %.*s\n", m->date_len, m->date);
+        if (m->body) {
+            printf("Body:\n%.*s\n", m->body_len, m->body);
+        }
+        printf("--------------------------------------------------\n");
+    }
 
     free(buf);
+    struct message_node *n = head;
+    while (n) {
+        struct message_node *next = n->next;
+        free(n);
+        n = next;
+    }
+
     return 0;
 }
 
diff --git a/stamail.h b/stamail.h
@@ -0,0 +1,11 @@
+#ifndef STAMAIL_H
+#define STAMAIL_H
+
+#include "json.h"
+
+struct message_node {
+    struct message m;
+    struct message_node *next;
+};
+
+#endif