From 9a88f7da453eadc72d8f333700dbd80777feecd1 Mon Sep 17 00:00:00 2001
From: David Oberhollenzer <david.oberhollenzer@tele2.at>
Date: Sun, 25 Feb 2018 14:33:19 +0100
Subject: Initial commit

Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>
---
 lib/src/splitkv.c | 124 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 lib/src/splitkv.c

(limited to 'lib/src/splitkv.c')

diff --git a/lib/src/splitkv.c b/lib/src/splitkv.c
new file mode 100644
index 0000000..6c6fe94
--- /dev/null
+++ b/lib/src/splitkv.c
@@ -0,0 +1,124 @@
+#include <ctype.h>
+
+#include "util.h"
+
+static char *skpspc(char *ptr)
+{
+	while (*ptr == ' ' || *ptr == '\t')
+		++ptr;
+	return ptr;
+}
+
+static int xdigit(int x)
+{
+	if (isupper(x))
+		return x - 'A' + 0x0A;
+	if (islower(x))
+		return x - 'a' + 0x0A;
+	return x - '0';
+}
+
+static char *parse_str(char *src)
+{
+	char *dst = src;
+	int c;
+
+	for (;;) {
+		c = *(src++);
+
+		switch (c) {
+		case '\\':
+			c = *(src++);
+
+			switch (c) {
+			case 'a': c = '\a'; break;
+			case 'b': c = '\b'; break;
+			case 'f': c = '\f'; break;
+			case 'n': c = '\n'; break;
+			case 't': c = '\t'; break;
+			case '\\': break;
+			case '"': break;
+			case 'x':
+				c = 0;
+				if (isxdigit(*src))
+					c = (c << 4) | xdigit(*(src++));
+				if (isxdigit(*src))
+					c = (c << 4) | xdigit(*(src++));
+				break;
+			case '0':
+				c = 0;
+				if (isdigit(*src) && *src < '8')
+					c = (c << 3) | (*(src++) - '0');
+				if (isdigit(*src) && *src < '8')
+					c = (c << 3) | (*(src++) - '0');
+				if (isdigit(*src) && *src < '8')
+					c = (c << 3) | (*(src++) - '0');
+				break;
+			default:
+				return NULL;
+			}
+			break;
+		case '"':
+			*(dst++) = '\0';
+			goto out;
+		}
+
+		*(dst++) = c;
+	}
+out:
+	return src;
+}
+
+int splitkv(char *line, char **key, char **value)
+{
+	*key = NULL;
+	*value = NULL;
+
+	line = skpspc(line);
+
+	if (*line == '#' || *line == '\0')
+		return 0;
+
+	if (!isalpha(*line))
+		return -1;
+
+	*key = line;
+
+	while (isalnum(*line))
+		++line;
+
+	if (*line == ' ' || *line == '\t') {
+		*(line++) = '\0';
+		line = skpspc(line);
+	}
+
+	if (*line != '=')
+		return -1;
+
+	*(line++) = '\0';
+	line = skpspc(line);
+
+	if (*line == '"') {
+		++line;
+		*value = line;
+
+		line = parse_str(line);
+	} else if (isalnum(*line)) {
+		*value = line;
+
+		while (isalnum(*line) || *line == '.' || *line == '_')
+			++line;
+
+		if (*line != '\0')
+			*(line++) = '\0';
+	} else {
+		return -1;
+	}
+
+	line = skpspc(line);
+
+	if (*line != '\0' && *line != '#')
+		return -1;
+
+	return 0;
+}
-- 
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