Import beginnings of a CSS parsing library.

Currently comprises a lexer.

svn path=/trunk/libcss/; revision=4112

4 files changed, 183 insertions, 0 deletions

diff --git a/src/utils/Makefile b/src/utils/Makefile
new file mode 100644
index 0000000..912590c
--- /dev/null
+++ b/src/utils/Makefile
@@ -0,0 +1,46 @@
+# Child makefile fragment
+#
+# Toolchain is provided by top-level makefile
+#
+# Variables provided by top-level makefile
+#
+# COMPONENT		The name of the component
+# EXPORT		The location of the export directory
+# TOP			The location of the source tree root
+# RELEASEDIR		The place to put release objects
+# DEBUGDIR		The place to put debug objects
+#
+# do_include		Canned command sequence to include a child makefile
+#
+# Variables provided by parent makefile:
+#
+# DIR			The name of the directory we're in, relative to $(TOP)
+#
+# Variables we can manipulate:
+#
+# ITEMS_CLEAN		The list of items to remove for "make clean"
+# ITEMS_DISTCLEAN	The list of items to remove for "make distclean"
+# TARGET_TESTS		The list of target names to run for "make test"
+#
+# SOURCES		The list of sources to build for $(COMPONENT)
+#
+# Plus anything from the toolchain
+
+# Push parent directory onto the directory stack
+sp             := $(sp).x
+dirstack_$(sp) := $(d)
+d              := $(DIR)
+
+# Sources
+SRCS_$(d) := errors.c
+
+# Append to sources for component
+SOURCES += $(addprefix $(d), $(SRCS_$(d)))
+
+# Now include any children we may have
+MAKE_INCLUDES := $(wildcard $(d)*/Makefile)
+$(eval $(foreach INC, $(MAKE_INCLUDES), $(call do_include,$(INC))))
+
+# Finally, pop off the directory stack
+d  := $(dirstack_$(sp))
+sp := $(basename $(sp))
diff --git a/src/utils/errors.c b/src/utils/errors.c
new file mode 100644
index 0000000..ac7dd42
--- /dev/null
+++ b/src/utils/errors.c
@@ -0,0 +1,80 @@
+/*
+ * This file is part of LibCSS.
+ * Licensed under the MIT License,
+ *                http://www.opensource.org/licenses/mit-license.php
+ * Copyright 2007 John-Mark Bell <jmb@netsurf-browser.org>
+ */
+
+#include <string.h>
+
+#include <libcss/errors.h>
+
+/**
+ * Convert a LibCSS error code to a string
+ *
+ * \param error  The error code to convert
+ * \return Pointer to string representation of error, or NULL if unknown.
+ */
+const char *css_error_to_string(css_error error)
+{
+	const char *result = NULL;
+
+	switch (error) {
+	case CSS_OK:
+		result = "No error";
+		break;
+	case CSS_NOMEM:
+		result = "Insufficient memory";
+		break;
+	case CSS_BADPARM:
+		result = "Bad parameter";
+		break;
+	case CSS_INVALID:
+		result = "Invalid input";
+		break;
+	case CSS_FILENOTFOUND:
+		result = "File not found";
+		break;
+	case CSS_NEEDDATA:
+		result = "Insufficient data";
+		break;
+	case CSS_BADCHARSET:
+		result = "BOM and @charset mismatch";
+		break;
+	case CSS_EOF:
+		result = "EOF encountered";
+		break;
+	}
+
+	return result;
+}
+
+/**
+ * Convert a string representation of an error name to a LibCSS error code
+ *
+ * \param str  String containing error name
+ * \param len  Length of string (bytes)
+ * \return LibCSS error code, or CSS_OK if unknown
+ */
+css_error css_error_from_string(const char *str, size_t len)
+{
+	if (strncmp(str, "CSS_OK", len) == 0) {
+		return CSS_OK;
+	} else if (strncmp(str, "CSS_NOMEM", len) == 0) {
+		return CSS_NOMEM;
+	} else if (strncmp(str, "CSS_BADPARM", len) == 0) {
+		return CSS_BADPARM;
+	} else if (strncmp(str, "CSS_INVALID", len) == 0) {
+		return CSS_INVALID;
+	} else if (strncmp(str, "CSS_FILENOTFOUND", len) == 0) {
+		return CSS_FILENOTFOUND;
+	} else if (strncmp(str, "CSS_NEEDDATA", len) == 0) {
+		return CSS_NEEDDATA;
+	} else if (strncmp(str, "CSS_BADCHARSET", len) == 0) {
+		return CSS_BADCHARSET;
+	} else if (strncmp(str, "CSS_EOF", len) == 0) {
+		return CSS_EOF;
+	}
+
+	return CSS_OK;
+}
diff --git a/src/utils/parserutilserror.h b/src/utils/parserutilserror.h
new file mode 100644
index 0000000..d2cffb6
--- /dev/null
+++ b/src/utils/parserutilserror.h
@@ -0,0 +1,29 @@
+/*
+ * This file is part of LibCSS.
+ * Licensed under the MIT License,
+ *                http://www.opensource.org/licenses/mit-license.php
+ * Copyright 2007 John-Mark Bell <jmb@netsurf-browser.org>
+ */
+
+#ifndef css_utils_parserutilserror_h_
+#define css_utils_parserutilserror_h_
+
+#include <parserutils/errors.h>
+
+#include <libcss/errors.h>
+
+/**
+ * Convert a ParserUtils error into a LibCSS error
+ * 
+ * \param error  The ParserUtils error to convert
+ * \return The corresponding LibCSS error
+ */
+static inline css_error css_error_from_parserutils_error(
+		parserutils_error error)
+{
+	/* Currently, there's a 1:1 mapping, so we've nothing to do */
+	return (css_error) error;
+}
+
+#endif
+
diff --git a/src/utils/utils.h b/src/utils/utils.h
new file mode 100644
index 0000000..ac19e59
--- /dev/null
+++ b/src/utils/utils.h
@@ -0,0 +1,28 @@
+/*
+ * This file is part of LibCSS.
+ * Licensed under the MIT License,
+ *                http://www.opensource.org/licenses/mit-license.php
+ * Copyright 2007 John-Mark Bell <jmb@netsurf-browser.org>
+ */
+
+#ifndef css_utils_h_
+#define css_utils_h_
+
+#ifndef max
+#define max(a,b) ((a)>(b)?(a):(b))
+#endif
+
+#ifndef min
+#define min(a,b) ((a)<(b)?(a):(b))
+#endif
+
+#ifndef SLEN
+/* Calculate length of a string constant */
+#define SLEN(s) (sizeof((s)) - 1) /* -1 for '\0' */
+#endif
+
+#ifndef UNUSED
+#define UNUSED(x) ((x)=(x))
+#endif
+
+#endif