From 9e660e594f6d3a43ea1427fb872801a2fcedad93 Mon Sep 17 00:00:00 2001
From: Krow Savcik <krow@savcik.xyz>
Date: Tue, 26 Sep 2023 22:32:35 +0300
Subject: initial commit

---
 src/palette.c | 113 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 src/palette.c

(limited to 'src/palette.c')

diff --git a/src/palette.c b/src/palette.c
new file mode 100644
index 0000000..3584e55
--- /dev/null
+++ b/src/palette.c
@@ -0,0 +1,113 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "palette.h"
+#include "debug.h"
+#include "types.h"
+
+Palette *
+palette_clone(const Palette *p)
+{
+	Palette *res;
+
+	/* TODO: better malloc (place list and num together) */
+	res = malloc(sizeof(Palette));
+	res->clist = malloc(p->num*sizeof(*p->clist));
+
+	res->num = p->num;
+	memcpy(res->clist, p->clist, p->num * sizeof(*p->clist));
+
+	return res;
+}
+
+static char *
+palette_intern_get_num(char *s, int *a)
+{
+	while (*s == ' ' || *s == '\t')
+		++s;
+	if (*s == '\n')
+		*a = -1;
+	else {
+		*a = 0;
+		while (*s >= '0' && *s <= '9') {
+			*a = (*a) * 10;
+			*a += (int) (*s-'0');
+			++s;
+		}
+	}
+
+	return s;
+}
+
+static uint8
+palette_intern_get_color(char *s, Color *c)
+{
+	int a;
+	char *st = s;
+
+	st = palette_intern_get_num(st, &a);
+	if (a < 0 || a > 255) return 1;
+	c->r = a;
+
+	st = palette_intern_get_num(st, &a);
+	if (a < 0 || a > 255) return 1;
+	c->g = a;
+
+	st = palette_intern_get_num(st, &a);
+	if (a < 0 || a > 255) return 1;
+	c->b = a;
+
+	return 0;
+}
+
+static uint
+palette_intern_get_color_number(const char *s)
+{
+	FILE *fp;
+	char line[1024];
+	size_t len = 1024;
+	uint ans = 0;
+
+	fp = fopen(s, "r");
+	while (fgets(line, len, fp)) {
+		if (line[0] >= '0' && line[0] <= '9')
+			++ans;
+	}
+	fclose(fp);
+
+	return ans;
+}
+
+Palette *
+palette_open_gpl(const char *p)
+{
+	/* TODO: check if file exists */
+	/* TODO: better parsing */
+	/* TODO: better malloc (place list and num together) */
+	Palette *res;
+	FILE *fp;
+	Color *c;
+	char line[1024];
+	size_t len = 1024;
+
+	res = malloc(sizeof(Palette));
+	res->num = palette_intern_get_color_number(p);
+	res->clist = malloc(res->num*sizeof(*res->clist));
+	c = res->clist;
+
+	fp = fopen(p, "r");
+	while (fgets(line, len, fp)) {
+		if (line[0] >= '0' && line[0] <= '9') {
+			if (palette_intern_get_color(line, c)) {
+				free(res->clist);
+				free(res);
+				return NULL;
+			}
+			c++;
+		}
+	}
+	fclose(fp);
+
+	return res;
+}
-- 
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