imported original firmware WRT54GL_v4.30.11_11_US

1 files changed, 91 insertions, 0 deletions

diff --git a/release/src/router/busybox/libbb/read_package_field.c b/release/src/router/busybox/libbb/read_package_field.c
new file mode 100644
index 00000000..f561df83
--- /dev/null
+++ b/release/src/router/busybox/libbb/read_package_field.c
@@ -0,0 +1,91 @@
+#include <stdlib.h>
+#include <string.h>
+#include "libbb.h"
+
+/*
+ * Gets the next package field from package_buffer, seperated into the field name
+ * and field value, it returns the int offset to the first character of the next field
+ */
+int read_package_field(const char *package_buffer, char **field_name, char **field_value)
+{
+	int offset_name_start = 0;
+	int offset_name_end = 0;
+	int offset_value_start = 0;
+	int offset_value_end = 0;
+	int offset = 0;
+	int next_offset;
+	int name_length;
+	int value_length;
+	int exit_flag = FALSE;
+
+	if (package_buffer == NULL) {
+		*field_name = NULL;
+		*field_value = NULL;
+		return(-1);
+	}
+	while (1) {
+		next_offset = offset + 1;
+		switch (package_buffer[offset]) {
+			case('\0'):
+				exit_flag = TRUE;
+				break;
+			case(':'):
+				if (offset_name_end == 0) {
+					offset_name_end = offset;
+					offset_value_start = next_offset;
+				}
+				/* TODO: Name might still have trailing spaces if ':' isnt
+				 * immediately after name */
+				break;
+			case('\n'):
+				/* TODO: The char next_offset may be out of bounds */
+				if (package_buffer[next_offset] != ' ') {
+					exit_flag = TRUE;
+					break;
+				}
+			case('\t'):
+			case(' '):
+				/* increment the value start point if its a just filler */
+				if (offset_name_start == offset) {
+					offset_name_start++;
+				}
+				if (offset_value_start == offset) {
+					offset_value_start++;
+				}
+				break;
+		}
+		if (exit_flag == TRUE) {
+			/* Check that the names are valid */
+			offset_value_end = offset;
+			name_length = offset_name_end - offset_name_start;
+			value_length = offset_value_end - offset_value_start;
+			if (name_length == 0) {
+				break;
+			}
+			if ((name_length > 0) && (value_length > 0)) {
+				break;
+			}
+
+			/* If not valid, start fresh with next field */
+			exit_flag = FALSE;
+			offset_name_start = offset + 1;
+			offset_name_end = 0;
+			offset_value_start = offset + 1;
+			offset_value_end = offset + 1;
+			offset++;
+		}
+		offset++;
+	}
+	if (name_length == 0) {
+		*field_name = NULL;
+	} else {
+		*field_name = xstrndup(&package_buffer[offset_name_start], name_length);
+	}
+	if (value_length > 0) {
+		*field_value = xstrndup(&package_buffer[offset_value_start], value_length);
+	} else {
+		*field_value = NULL;
+	}
+	return(next_offset);
+}
+