Copied from old documentation. Removed all Gedcom_val details.
[gedcom-parse.git] / gedcom / gedcom_lex_common.c
index efc4bf931eed796ff332e6dec4df9a36f20d9c28..06c1f77a8a5fefb51696d6fb7ac63e9b1c7f917c 100644 (file)
 #include "gedcom_internal.h"
 #include "multilex.h"
 #include "encoding.h"
+#include "encoding_state.h"
 #include "gedcom.h"
 #include "gedcom.tabgen.h"
 #include "compat.h"
 
 static size_t encoding_width;
 static int current_level = -1;
-static int level_diff=MAXGEDCLEVEL;
+static int level_diff = MAXGEDCLEVEL;
 static size_t line_len = 0;
+static int tab_space = 0;
+static int current_tag = -1;
 
-static char ptr_buf[MAXGEDCPTRLEN * UTF_FACTOR + 1];
-static char tag_buf[MAXGEDCTAGLEN * UTF_FACTOR + 1];
-static char str_buf[MAXGEDCLINELEN * UTF_FACTOR + 1];
+static struct conv_buffer* ptr_buffer = NULL;
+static struct conv_buffer* tag_buffer = NULL;
+static struct conv_buffer* str_buffer = NULL;
+
+#define INITIAL_PTR_BUFFER_LEN MAXGEDCPTRLEN * UTF_FACTOR + 1
+#define INITIAL_TAG_BUFFER_LEN MAXGEDCTAGLEN * UTF_FACTOR + 1
+#define INITIAL_STR_BUFFER_LEN MAXGEDCLINELEN * UTF_FACTOR + 1
 
 #ifdef LEXER_TEST 
 YYSTYPE gedcom_lval;
 int line_no = 1;
-int compat_at = 0;
 
 int gedcom_lex();
 
@@ -90,7 +96,8 @@ int test_loop(ENCODING enc, const char* code)
 
 static void error_line_too_long()
 {
-  gedcom_error(_("Line too long, max %d characters allowed"), MAXGEDCLINELEN); 
+  gedcom_error(_("Line too long, max %d characters allowed"),
+              MAXGEDCLINELEN); 
 }
 
 static void error_level_leading_zero()
@@ -131,6 +138,11 @@ static void error_at_character()
   gedcom_error(_("'@' character should be written as '@@' in values"));
 }
 
+static void error_tab_character()
+{
+  gedcom_error(_("Tab character is not allowed in values"));
+}
+
 static void error_unexpected_character(const char* str, char ch)
 {
   gedcom_error(_("Unexpected character: '%s' (0x%02x)"), str, ch);
@@ -143,7 +155,7 @@ static int dummy_conv = 0;
 #elif LEX_SECTION == 2
 
 #define TO_INTERNAL(STR,OUTBUF) \
-  (dummy_conv ? STR : to_internal(STR, yyleng, OUTBUF, sizeof(OUTBUF)))
+  (dummy_conv ? STR : to_internal(STR, yyleng, OUTBUF))
 
 #define INIT_LINE_LEN \
   line_len = 0;
@@ -151,7 +163,8 @@ static int dummy_conv = 0;
 #define CHECK_LINE_LEN                                                        \
   { if (line_len != (size_t)-1) {                                             \
       line_len += strlen(yytext);                                             \
-      if (line_len > MAXGEDCLINELEN * encoding_width) {                       \
+      if (line_len > MAXGEDCLINELEN * encoding_width                          \
+         && ! compat_long_line(current_level, current_tag)) {                \
         error_line_too_long();                                                \
         line_len = (size_t)-1;                                                \
         return BADTOKEN;                                                      \
@@ -159,12 +172,20 @@ static int dummy_conv = 0;
     }                                                                         \
   }
 
+#define GENERATE_TAB_SPACE                                                    \
+  { gedcom_lval.string = " ";                                                 \
+    tab_space--;                                                              \
+    return DELIM;                                                             \
+  }
+
 #define MKTAGACTION(THETAG)                                                  \
   { CHECK_LINE_LEN;                                                          \
-    gedcom_lval.tag.string = TO_INTERNAL(yytext, tag_buf);                   \
-    gedcom_lval.tag.value  = TAG_##THETAG;                                   \
+    gedcom_lval.tag.string = TO_INTERNAL(yytext, tag_buffer);                \
+    current_tag            = TAG_##THETAG;                                   \
+    gedcom_lval.tag.value  = current_tag;                                    \
     BEGIN(NORMAL);                                                           \
-    return TAG_##THETAG;                                                     \
+    line_no++;                                                               \
+    return current_tag;                                                      \
   }
 
 /* The GEDCOM level number is converted into a sequence of opening
@@ -200,10 +221,16 @@ static int dummy_conv = 0;
 
    But because this means that one token is converted into a series
    of tokens, there is some initial code following immediately here
-   that returns "pending" tokens. */
+   that returns "pending" tokens.
+
+   Also, for compatibility tabs are converted into spaces, which is
+   also handled here */
 
 #define ACTION_BEFORE_REGEXPS                                                 \
-   { if (level_diff < 1) {                                                    \
+   { if (compat_mode(C_TAB_CHARACTER) && tab_space-- > 0) {                   \
+       GENERATE_TAB_SPACE;                                                    \
+     }                                                                        \
+     else if (level_diff < 1) {                                               \
        level_diff++;                                                          \
        return CLOSE;                                                          \
      }                                                                        \
@@ -231,10 +258,11 @@ static int dummy_conv = 0;
 
 
 #define ACTION_DIGITS                                                         \
-   { int level = atoi(TO_INTERNAL(yytext, str_buf));                          \
+   { int level = atoi(TO_INTERNAL(yytext, str_buffer));                       \
      CHECK_LINE_LEN;                                                          \
      if ((level < 0) || (level > MAXGEDCLEVEL)) {                             \
        error_level_out_of_range();                                            \
+       line_no++;                                                             \
        return BADTOKEN;                                                       \
      }                                                                        \
      level_diff = level - current_level;                                      \
@@ -252,6 +280,7 @@ static int dummy_conv = 0;
      else {                                                                   \
        /* should never happen (error to GEDCOM spec) */                       \
        error_level_too_high(level_diff);                                      \
+       line_no++;                                                             \
        return BADTOKEN;                                                       \
      }                                                                        \
    } 
@@ -260,19 +289,21 @@ static int dummy_conv = 0;
 #define ACTION_ALPHANUM                                                       \
    { if (strlen(yytext) > MAXGEDCTAGLEN * encoding_width) {                   \
        error_tag_too_long(yytext);                                            \
+       line_no++;                                                             \
        return BADTOKEN;                                                       \
      }                                                                        \
      CHECK_LINE_LEN;                                                          \
-     gedcom_lval.tag.string = TO_INTERNAL(yytext, tag_buf);                   \
+     gedcom_lval.tag.string = TO_INTERNAL(yytext, tag_buffer);                \
      gedcom_lval.tag.value  = USERTAG;                                        \
      BEGIN(NORMAL);                                                           \
+     line_no++;                                                               \
      return USERTAG;                                                          \
    }
 
 
 #define ACTION_DELIM                                                          \
   { CHECK_LINE_LEN;                                                           \
-    gedcom_lval.string = TO_INTERNAL(yytext, str_buf);                        \
+    gedcom_lval.string = TO_INTERNAL(yytext, str_buffer);                     \
     return DELIM;                                                             \
   }
 
@@ -280,7 +311,7 @@ static int dummy_conv = 0;
 #define ACTION_ANY                                                            \
   { char* tmp;                                                                \
     CHECK_LINE_LEN;                                                           \
-    tmp = TO_INTERNAL(yytext, str_buf);                                       \
+    tmp = TO_INTERNAL(yytext, str_buffer);                                    \
     if (!tmp) {                                                               \
       /* Something went wrong during conversion... */                         \
           error_invalid_character(yytext, yytext[0]);                         \
@@ -302,7 +333,7 @@ static int dummy_conv = 0;
 
 #define ACTION_ESCAPE                                                         \
   { CHECK_LINE_LEN;                                                           \
-    gedcom_lval.string = TO_INTERNAL(yytext, str_buf);                        \
+    gedcom_lval.string = TO_INTERNAL(yytext, str_buffer);                     \
     return ESCAPE;                                                            \
   }
 
@@ -313,7 +344,7 @@ static int dummy_conv = 0;
       error_pointer_too_long(yytext);                                         \
       return BADTOKEN;                                                        \
     }                                                                         \
-    gedcom_lval.string = TO_INTERNAL(yytext, ptr_buf);                        \
+    gedcom_lval.string = TO_INTERNAL(yytext, ptr_buffer);                     \
     return POINTER;                                                           \
   }
 
@@ -327,7 +358,8 @@ static int dummy_conv = 0;
 #define ACTION_TERMINATOR                                                     \
   { CHECK_LINE_LEN;                                                           \
     INIT_LINE_LEN;                                                            \
-    line_no++;                                                                \
+    if (line_no == 1)                                                         \
+      set_read_encoding_terminator(TO_INTERNAL(yytext, str_buffer));          \
     BEGIN(INITIAL);                                                           \
   }
 
@@ -353,7 +385,7 @@ static int dummy_conv = 0;
   } 
 
 #define ACTION_NORMAL_AT                                                      \
-  { if (compat_at) {                                                          \
+  { if (compat_mode(C_NO_DOUBLE_AT)) {                                        \
       int i, j;                                                               \
       char *yycopy = strdup(yytext);                                          \
       if (yycopy) {                                                           \
@@ -372,6 +404,17 @@ static int dummy_conv = 0;
     }                                                                         \
   }
 
+#define ACTION_TAB                                                            \
+  { if (compat_mode(C_TAB_CHARACTER)) {                                       \
+      tab_space = 8;                                                          \
+      GENERATE_TAB_SPACE;                                                     \
+    }                                                                         \
+    else {                                                                    \
+      error_tab_character();                                                  \
+      return BADTOKEN;                                                        \
+    }                                                                         \
+  }
+
 #define ACTION_UNEXPECTED                                                     \
   { error_unexpected_character(yytext, yytext[0]);                            \
     return BADTOKEN;                                                          \
@@ -384,11 +427,28 @@ int yywrap()
   return 1;
 }
 
+static void free_conv_buffers()
+{
+  free_conv_buffer(ptr_buffer);
+  free_conv_buffer(tag_buffer);
+  free_conv_buffer(str_buffer);
+}
+
 static void yylex_cleanup()
 {
   /* fix memory leak in lex */
   yy_delete_buffer(yy_current_buffer);
   yy_current_buffer = NULL;
+  free_conv_buffers();
+}
+
+static void init_conv_buffers()
+{
+  if (!ptr_buffer) {
+    ptr_buffer = create_conv_buffer(INITIAL_PTR_BUFFER_LEN);
+    tag_buffer = create_conv_buffer(INITIAL_TAG_BUFFER_LEN);
+    str_buffer = create_conv_buffer(INITIAL_STR_BUFFER_LEN);
+  }
 }
 
 static int exitfuncregistered = 0;
@@ -397,6 +457,7 @@ void yymyinit(FILE *f)
 {
   if (! exitfuncregistered && atexit(yylex_cleanup) == 0)
     exitfuncregistered = 1;
+  init_conv_buffers();
   yyin = f;
   yyrestart(f);
   /* Reset our state */