add parse escape sequence to i18n.c

git-svn-id: http://opensvn.csie.org/pttbbs/branches/Jaky.i18n@1900 63ad8ddf-47c3-0310-b6dd-a9e9d9715204

1 files changed, 54 insertions, 5 deletions

diff --git a/mbbsd/i18n.c b/mbbsd/i18n.c
index ddae4213..b23216d6 100644
--- a/mbbsd/i18n.c
+++ b/mbbsd/i18n.c
@@ -1,14 +1,62 @@
 #include "bbs.h"
 
+/* Created by Chia-Kuang Yu, Apr 26th, 2004 */
+
 #define MAX_LANGFILE_SIZE (512 * 1024)
 #define MAX_STRING_LEN 4096
 #define MAX_BUFFER_SIZE (MAX_LANG * MAX_STRING * 20)
 
 #ifdef I18N
+int parse_hex(unsigned char *buf, unsigned char *ret) {
+	unsigned char table[] = "0123456789ABCDEF";
+	unsigned char digit[2];
+	char ptr[2];
+	digit[0] = toupper(*buf);
+	digit[1] = toupper(*(buf + 1));
+	if ((ptr[0] = strchr(table, digit[0])) && 
+		(ptr[1] = strchr(table, digit[1]))) {
+		*ret = (char)((ptr[0] - table) << 4 + (ptr[1] - table));
+		return 0;
+	}
+	return -1;
+}
+
+int parse_oct(unsigned char *buf, unsigned char *ret) {
+	int i;
+	*ret = 0;
+	for (i = 0; i < 3; i++) {
+		if (buf[i] - '0' < 0 && buf[i] - '0' > 8)
+			return -1;
+		*ret = (char)(*ret * 8 + buf[i] - '0');
+	}
+	return 0;
+}
+unsigned char parse_escape(char *buf, int *length) {
+	unsigned char input[] = "abfnrtv\\?'\"";
+	unsigned char output[] = "\a\b\f\n\r\t\v\\\?\'\"";
+	unsigned char ret = *buf;
+	*length = 1;
+	for (unsigned char *ptr = input; *ptr != 0; ptr++)
+		if (*buf == *ptr)
+			return output[ptr - input];
+	
+	/* hexidecimal number*/
+	if (*buf == 'x')
+		if (parse_hex(buf + 1, &ret) != -1)
+			length = 2;	
+				
+	/* octal number */
+	else if(isdigit(*buf))
+		if (parse_oct(buf, &ret) != -1)
+			length = 3;
+	return ret;
+}
+
 void load_language(char *filename, char *lang_str[MAX_STRING], int *_offset) {
 	int i, num_string, string_index, filesize;
-	int inside_string, digit;
+	int inside_string, digit, length;
 	char *buf, *start, temp[256];
+	char escape_sequence;
 	FILE *f;	
 	char *p_str_head = SHM->i18nstrbody;
 	int offset = *_offset;
@@ -42,14 +90,16 @@ void load_language(char *filename, char *lang_str[MAX_STRING], int *_offset) {
 					p_str_head[offset] = 0;
 					if (string_index >= 0 && string_index < MAX_STRING) {
 						lang_str[string_index] = start;
-						//printf ("%d \"%s\"\n", string_index, start);
-						//printf("%d\n", strlen(lang_str[string_index]));
-						//fflush(0);
 					}
 					string_index = 0;
 					offset++;
 					continue;
 				}
+				else if (buf[i] == '\\' && inside_string == TRUE) {
+					escape_sequence = parse_escape(buf + i + 1, &length);
+					i += length;
+					buf[i] = escape_sequence;
+				}
 				if (inside_string == TRUE) {
 					if (offset < MAX_BUFFER_SIZE) {
 						p_str_head[offset] = buf[i];
@@ -79,6 +129,5 @@ void load_i18nstring() {
 	offset = 1;
 	for (i = 0; i < MAX_LANG; i++)
 		load_language(lang_file[i], SHM->i18nstr[i], &offset);
-	//printf ("%d\n", offset);
 }
 #endif