Add reading from a file

1 files changed, 27 insertions, 1 deletions

diff --git a/cudl.c b/cudl.c
index 94e3f7f..9c71d57 100644
--- a/cudl.c
+++ b/cudl.c
@@ -30,6 +30,24 @@ struct cudl_value {
 #define CUDL_OK 0
 #define CUDL_ERR_OUT_OF_MEMORY 1
 #define CUDL_ERR_MISSING_VALUE 2
+#define CUDL_ERR_READING 3
+
+static char *fread_all(FILE *file) {
+	size_t size;
+	char *buffer;
+	fseek(file, 0, SEEK_END);
+	size = ftell(file);
+	rewind(file);
+	clearerr(file);
+	if ((buffer = malloc(size + 1)) == NULL)
+		return NULL;
+	if (fread(buffer, 1, size, file) != size) {
+		free(buffer);
+		return NULL;
+	}
+	buffer[size] = '\0';
+	return buffer;
+}
 
 void cudl_debug(struct cudl_value *value) {
 }
@@ -50,7 +68,15 @@ void cudl_deinit_value(struct cudl_value value) {
 	}
 }
 
-int cudl_parse_from_file(FILE input_file, struct cudl_value *value) {
+int cudl_parse_from_file(FILE *file, struct cudl_value *value) {
+	char *input;
+	if ((input = fread_all(file)) == NULL) {
+		if (ferror(file))
+			return CUDL_ERR_READING;
+		else
+			return CUDL_ERR_OUT_OF_MEMORY;
+	}
+	return cudl_parse(input, value);
 }
 
 int cudl_parse(char *input, struct cudl_value *value) {