checkpoint!

1 files changed, 98 insertions, 0 deletions

diff --git a/include/vec.h b/include/vec.h
new file mode 100644
index 0000000..498fac4
--- /dev/null
+++ b/include/vec.h
@@ -0,0 +1,98 @@
+/*
+
+  pkgit - package it!
+
+  Copyright (C) 2026 dacctal
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+*/
+
+#ifndef PKGIT_VEC_H
+#define PKGIT_VEC_H
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+#define VEC_INITIAL_SIZE 5
+
+#define VEC_DECL(T, name)                                                      \
+	typedef struct {                                                           \
+		T *data;                                                               \
+		size_t len;                                                            \
+		size_t cap;                                                            \
+	} name
+
+#define vec_append(v, item)                                                    \
+	do {                                                                       \
+		if ((v)->len + 1 > (v)->cap) {                                         \
+			if ((v)->cap == 0)                                                 \
+				(v)->cap = VEC_INITIAL_SIZE;                                   \
+			else                                                               \
+				(v)->cap += ((v)->cap >> 1);                                   \
+			(v)->data = realloc((v)->data, sizeof(*(v)->data) * (v)->cap);     \
+			check_alloc((v)->data);                                            \
+		}                                                                      \
+		(v)->data[(v)->len++] = (item);                                        \
+	} while (0)
+
+#define vec_clear(v)                                                           \
+	do {                                                                       \
+		memset((v)->data, 0, sizeof(*(v)->data) * (v)->cap);                   \
+		(v)->len = 0;                                                          \
+	} while (0)
+
+#define vec_free(v)                                                            \
+	do {                                                                       \
+		if ((v)->data) {                                                       \
+			free((v)->data);                                                   \
+			(v)->data = NULL;                                                  \
+		}                                                                      \
+	} while (0)
+
+#define vec_reserve(v, amt)                                                    \
+	do {                                                                       \
+		if (amt >= (v)->len) {                                                 \
+			(v)->data = realloc((v)->data, sizeof(*(v)->data) * amt);          \
+			check_alloc((v)->data);                                            \
+			(v)->cap = amt;                                                    \
+		}                                                                      \
+	} while (0)
+
+#define vec_append_many(v, itms, itms_len)                                     \
+	do {                                                                       \
+		if ((v)->len + itms_len > (v)->cap) {                                  \
+			(v)->cap += itms_len;                                              \
+			(v)->data = realloc((v)->data, sizeof(*(v)->data) * (v)->cap);     \
+			check_alloc((v)->data);                                            \
+		}                                                                      \
+		memcpy(&(v)->data[(v)->len], itms, sizeof(*(v)->data) * itms_len);     \
+		(v)->len += itms_len;                                                  \
+	} while (0)
+
+#define vec_last(v) ((v)->data[(assert((v)->len > 0), (v)->len - 1)])
+
+#define vec_at(v, pos)                                                         \
+	((v)->data[(assert(0 <= (pos) && (pos) < (v)->len), pos)])
+
+#define vec_pop(v) ((v)->data[(assert((v)->len > 0), --(v)->len)])
+
+#define vec_pop_many(v, count)                                                 \
+	do {                                                                       \
+		assert(count < (v)->len);                                              \
+		(v)->len -= count;                                                     \
+	} while (0)
+
+#endif // PKGIT_VEC_H