commit 60277d27ee7f5763765bf7a0c811b72268e79320
Author: finwo <finwo@pm.me>
Date: Wed, 15 Jul 2026 00:38:43 +0200
Project init
Diffstat:
8 files changed, 221 insertions(+), 0 deletions(-)
diff --git a/.dep b/.dep
diff --git a/.editorconfig b/.editorconfig
@@ -0,0 +1,13 @@
+# 2d0e4a3f-ac19-430c-bf1b-46c68651ce21
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+indent_size = 2
+indent_style = space
+trim_trailing_whitespace = true
+
+[Makefile*]
+indent_style = tab
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,3 @@
+/confgen
+*.o
+/lib/
diff --git a/LICENSE.md b/LICENSE.md
@@ -0,0 +1,34 @@
+Copyright (c) 2026 finwo
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to use, copy,
+modify, and distribute the Software, subject to the following conditions:
+
+ 1. Redistributions of source code must retain the above copyright notice, this
+ list of conditions, and the following disclaimer.
+
+ 2. Redistributions in binary form, or any public offering of the Software
+ (including hosted or managed services), must reproduce the above copyright
+ notice, this list of conditions, and the following disclaimer in the
+ documentation and/or other materials provided.
+
+ 3. Any redistribution or public offering of the Software must clearly attribute
+ the Software to the original copyright holder, reference this License, and
+ include a link to the official project repository or website.
+
+ 4. The Software may not be renamed, rebranded, or marketed in a manner that
+ implies it is an independent or proprietary product. Derivative works must
+ clearly state that they are based on the Software.
+
+ 5. Modifications to copies of the Software must carry prominent notices stating
+ that changes were made, the nature of the modifications, and the date of the
+ modifications.
+
+Any violation of these conditions terminates the permissions granted herein.
+
+THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/Makefile b/Makefile
@@ -0,0 +1,37 @@
+# Initial config
+# LIBS=
+SRC:=
+SRC+=$(wildcard src/*.c)
+SRC+=$(wildcard src/*/*.c)
+
+CFLAGS?=-Wall -s -O2
+
+INCLUDES:=
+INCLUDES+=-I src
+
+# include lib/.dep/config.mk
+
+CFLAGS+=$(INCLUDES)
+
+# Which objects to generate before merging everything together
+OBJ:=$(SRC:.c=.o)
+
+BIN=confgen
+
+.PHONY: default
+default: $(BIN)
+# default: $(BIN) $(BIN).1
+
+%.o: %.c $(LIBS)
+ $(CC) $(CFLAGS) $(@:.o=.c) -D__NAME=\"$(BIN)\" -c -o $@
+
+$(BIN): $(OBJ)
+ $(CC) $(CFLAGS) $(OBJ) -o $@
+
+# # Build manpage
+# $(BIN).1: manpage.1.md
+# env NAME=$(BIN) envsubst < manpage.1.md | pandoc --standalone --from markdown --to man -o $(BIN).1
+
+.PHONY: clean
+clean:
+ rm -f $(OBJ)
diff --git a/src/main.c b/src/main.c
@@ -0,0 +1,41 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "util/buffer.h"
+
+int main() {
+
+ struct confgen_buffer *buf = calloc(1, sizeof(struct confgen_buffer));
+
+ confgen_buffer_append(buf, "Hello world", 11);
+
+ printf("Stats:\n");
+ printf(" alloc: %p\n" , buf->alloc);
+ printf(" dat : %p\n" , buf->dat);
+ printf(" len : %ld\n", buf->len);
+ printf(" cap : %ld\n", buf->cap);
+ printf(" data : [%*s]\n", (int)(buf->len), buf->dat);
+ printf("\n");
+
+ confgen_buffer_append(buf, "™", 3);
+
+ printf("Stats:\n");
+ printf(" alloc: %p\n" , buf->alloc);
+ printf(" dat : %p\n" , buf->dat);
+ printf(" len : %ld\n", buf->len);
+ printf(" cap : %ld\n", buf->cap);
+ printf(" data : [%*s]\n", (int)(buf->len), buf->dat);
+ printf("\n");
+
+ confgen_buffer_consume(buf, 6);
+
+ printf("Stats:\n");
+ printf(" alloc: %p\n" , buf->alloc);
+ printf(" dat : %p\n" , buf->dat);
+ printf(" len : %ld\n", buf->len);
+ printf(" cap : %ld\n", buf->cap);
+ printf(" data : [%*s]\n", (int)(buf->len), buf->dat);
+ printf("\n");
+
+ return 0;
+}
diff --git a/src/util/buffer.c b/src/util/buffer.c
@@ -0,0 +1,61 @@
+#include <string.h>
+#include <stdlib.h>
+
+#include "buffer.h"
+
+#ifndef MAX
+#define MAX(a,b) ((a)>(b)?(a):(b))
+#endif
+
+#ifndef MIN
+#define MIN(a,b) ((a)<(b)?(a):(b))
+#endif
+
+
+void confgen_buffer_append(struct confgen_buffer *subject, const char *source, size_t length) {
+ if (!subject) return;
+
+ // Initial alloc if blank buffer
+ if (!subject->alloc) {
+ size_t l = MAX(32, length);
+ subject->alloc = malloc(l);
+ subject->dat = subject->alloc;
+ subject->cap = l;
+ subject->len = 0;
+ goto confgen_buffer_append_copy; // Simply skips cap checks
+ }
+
+ // Eject consumed data if we need space
+ if (
+ (subject->dat != subject->alloc) &&
+ ((subject->len + length) > subject->cap)
+ ) {
+ size_t diff = subject->dat - subject->alloc;
+ memmove(subject->alloc, subject->dat, subject->len);
+ subject->cap += diff;
+ subject->dat = subject->alloc;
+ }
+
+ // Grow buffer if still not enough space
+ if ((subject->len + length) > subject->cap) {
+ subject->cap = MAX(32, subject->cap * 2);
+ subject->alloc = realloc(subject->alloc, subject->cap);
+ subject->dat = subject->alloc;
+ }
+
+ // Add the data to the end
+confgen_buffer_append_copy:
+ memcpy(subject->dat + subject->len, source, length);
+ subject->len += length;
+}
+
+size_t confgen_buffer_consume(struct confgen_buffer *subject, size_t length) {
+ if (!subject) return 0;
+
+ size_t n = MIN(length, subject->len);
+ subject->dat += n;
+ subject->len -= n;
+ subject->cap -= n;
+
+ return n;
+}
diff --git a/src/util/buffer.h b/src/util/buffer.h
@@ -0,0 +1,32 @@
+#ifndef __CONFGEN_UTIL_BUFFER_H__
+#define __CONFGEN_UTIL_BUFFER_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stddef.h>
+
+struct confgen_buffer {
+ char *alloc;
+ char *dat;
+ size_t len;
+ size_t cap;
+};
+
+/**
+ * Append <length> bytes to the data in the buffer
+ * Copies the data, does not mutate the source
+ */
+void confgen_buffer_append(struct confgen_buffer *subject, const char *source, size_t length);
+
+/**
+ * Remove <length> bytes from the front of the buffer
+ */
+size_t confgen_buffer_consume(struct confgen_buffer *subject, size_t length);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // __CONFGEN_UTIL_BUFFER_H__
