#include "gedcom_internal.h"
#include "multilex.h"
#include "encoding.h"
+#include "encoding_state.h"
#include "xref.h"
-int line_no;
+int line_no = 0;
typedef int (*lex_func)(void);
lex_func lf;
-int lexer_init(ENCODING enc, FILE* f)
+#define NEW_MODEL_FILE "new.ged"
+
+int lexer_init(Encoding enc, FILE* f)
{
if (enc == ONE_BYTE) {
- gedcom_1byte_in = f;
- lf = &gedcom_1byte_lex;
- set_encoding_width(enc);
+ lf = &gedcom_1byte_lex;
+ gedcom_1byte_myinit(f);
+ set_read_encoding_width(enc);
return open_conv_to_internal("ASCII");
}
else if (enc == TWO_BYTE_HILO) {
- gedcom_hilo_in = f;
- lf = &gedcom_hilo_lex;
- set_encoding_width(enc);
+ lf = &gedcom_hilo_lex;
+ gedcom_hilo_myinit(f);
+ set_read_encoding_width(enc);
return open_conv_to_internal("UNICODE");
}
else if (enc == TWO_BYTE_LOHI) {
- gedcom_lohi_in = f;
- lf = &gedcom_lohi_lex;
- set_encoding_width(enc);
+ lf = &gedcom_lohi_lex;
+ gedcom_lohi_myinit(f);
+ set_read_encoding_width(enc);
return open_conv_to_internal("UNICODE");
}
else {
return (*lf)();
}
+void rewind_file(FILE* f)
+{
+ if (fseek(f, 0, 0) != 0)
+ gedcom_warning(_("Error positioning input file: %s"), strerror(errno));
+}
+
int determine_encoding(FILE* f)
{
char first[2];
+ int read;
- fread(first, 1, 2, f);
- if ((first[0] == '0') && (first[1] == ' ')) {
- gedcom_debug_print(_("One-byte encoding"));
- fseek(f, 0, 0);
+ set_read_encoding_bom(WITHOUT_BOM);
+ read = fread(first, 1, 2, f);
+ if (read != 2) {
+ gedcom_warning(_("Error reading from input file: %s"), strerror(errno));
+ rewind_file(f);
+ return ONE_BYTE;
+ }
+ else if ((first[0] == '0') && (first[1] == ' ')) {
+ gedcom_debug_print("One-byte encoding");
+ rewind_file(f);
return ONE_BYTE;
}
- else if ((first[0] == '\0') && (first[1] == '0'))
- {
- gedcom_debug_print(_("Two-byte encoding, high-low"));
- fseek(f, 0, 0);
+ else if ((first[0] == '\0') && (first[1] == '0')) {
+ gedcom_debug_print("Two-byte encoding, high-low");
+ rewind_file(f);
return TWO_BYTE_HILO;
}
- else if ((first[0] == '\xFE') && (first[1] == '\xFF'))
- {
- gedcom_debug_print(_("Two-byte encoding, high-low, with BOM"));
+ else if ((first[0] == '\xFE') && (first[1] == '\xFF')) {
+ gedcom_debug_print("Two-byte encoding, high-low, with BOM");
+ set_read_encoding_bom(WITH_BOM);
return TWO_BYTE_HILO;
}
- else if ((first[0] == '0') && (first[1] == '\0'))
- {
- gedcom_debug_print(_("Two-byte encoding, low-high"));
- fseek(f, 0, 0);
+ else if ((first[0] == '0') && (first[1] == '\0')) {
+ gedcom_debug_print("Two-byte encoding, low-high");
+ rewind_file(f);
return TWO_BYTE_LOHI;
}
- else if ((first[0] == '\xFF') && (first[1] == '\xFE'))
- {
- gedcom_debug_print(_("Two-byte encoding, low-high, with BOM"));
+ else if ((first[0] == '\xFF') && (first[1] == '\xFE')) {
+ gedcom_debug_print("Two-byte encoding, low-high, with BOM");
+ set_read_encoding_bom(WITH_BOM);
return TWO_BYTE_LOHI;
}
+ else if ((first[0] == '\xEF') && (first[1] == '\xBB')) {
+ read = fread(first, 1, 1, f);
+ if (read != 1) {
+ gedcom_warning(_("Error reading from input file: %s"), strerror(errno));
+ rewind_file(f);
+ }
+ else if (first[0] == '\xBF') {
+ set_read_encoding_bom(WITH_BOM);
+ gedcom_debug_print("UTF-8 encoding, with BOM");
+ }
+ else {
+ gedcom_warning(_("Unknown encoding, falling back to one-byte"));
+ rewind_file(f);
+ }
+ return ONE_BYTE;
+ }
else {
gedcom_warning(_("Unknown encoding, falling back to one-byte"));
- fseek(f, 0, 0);
+ rewind_file(f);
return ONE_BYTE;
}
}
-int gedcom_parse_file(char* file_name)
+int init_called = 0;
+
+/** This function initializes the Gedcom parser library and must be called
+ before any other function in this library.
+
+ The function also initializes locale handling by calling
+ <tt> setlocale(LC_ALL, "") </tt>, in case the application would not do this
+ (it doesn't hurt for the application to do the same).
+
+ \attention This function should be called as early as possible. The
+ requirement
+ is that it should come before the first call to \c iconv_open (part of the
+ generic character set conversion feature) in the program, either by your
+ program itself, or indirectly by the library calls it makes.
+ \attention Practically,
+ it should e.g. come before any calls to any GTK functions, because GTK
+ uses \c iconv_open in its initialization.
+
+ \retval 0 in case of success
+ \retval nonzero in case of failure (e.g. failure to set locale)
+ */
+int gedcom_init()
+{
+ init_called = 1;
+ update_gconv_search_path();
+ init_encodings();
+ if (!setlocale(LC_ALL, "")
+ || ! bindtextdomain(PACKAGE, LOCALEDIR)
+ || ! bind_textdomain_codeset(PACKAGE, INTERNAL_ENCODING))
+ return 1;
+ else
+ return 0;
+}
+
+/** This function parses the given file. By itself, it doesn't provide any
+ other information than the parse result.
+
+ The function also empties the cross-reference table before parsing, and
+ checks the validity of the
+ cross-references if the parse was successful.
+ The following conditions can occur in the cross-reference table:
+ - An xref was defined, but not used (warning)
+ - An xref was used, but not defined (error)
+ - An xref was used as a different type than the defined type (error)
+
+ \param file_name The name of the Gedcom file to parse
+
+ \retval 0 if the parse was successful and no errors were found in the
+ cross-reference table
+ \retval nonzero on errors, which can include:
+ - \ref gedcom_init() was not called
+ - The given file was not found
+ - The parse of the given file failed
+ - There were errors found in the cross-reference table
+ */
+
+int gedcom_parse_file(const char* file_name)
{
- ENCODING enc;
+ Encoding enc;
int result = 1;
FILE* file;
-
- char *save_locale = setlocale(LC_ALL, NULL);
- char *save_textdom = textdomain(NULL);
- setlocale(LC_ALL, "");
- bindtextdomain(PACKAGE, LOCALEDIR);
- bind_textdomain_codeset(PACKAGE, INTERNAL_ENCODING);
- textdomain(PACKAGE);
-
- line_no = 1;
- file = fopen(file_name, "r");
- if (!file) {
- gedcom_error(_("Could not open file '%s'"), file_name);
+
+ if (!init_called) {
+ gedcom_error(_("Internal error: GEDCOM parser not initialized"));
}
else {
- init_encodings();
- enc = determine_encoding(file);
-
- if (lexer_init(enc, file)) {
+ file = fopen(file_name, "r");
+ if (!file) {
+ gedcom_error(_("Could not open file '%s': %s"),
+ file_name, strerror(errno));
+ }
+ else {
line_no = 1;
- make_xref_table();
- result = gedcom_parse();
- if (result == 0)
- result = check_xref_table();
+ enc = determine_encoding(file);
+
+ if (lexer_init(enc, file)) {
+ line_no = 0;
+ make_xref_table();
+ result = gedcom_parse();
+ line_no = 0;
+ if (result == 0)
+ result = check_xref_table();
+ }
+ lexer_close();
+ fclose(file);
}
- lexer_close();
- fclose(file);
}
- textdomain(save_textdom);
- setlocale(LC_ALL, save_locale);
return result;
}
+/** This function starts a new model. It does this by parsing the \c new.ged
+ file in the data directory of the library (\c $PREFIX/share/gedcom-parse).
+ This can be used to start from an empty model, and to build up the model
+ by adding new records yourself.
+
+ \retval 0 on success
+ \retval nonzero on errors (mainly the errors from \ref gedcom_parse_file()).
+ */
+
+int gedcom_new_model()
+{
+ int result = 1;
+ FILE* file;
+
+ file = fopen(NEW_MODEL_FILE, "r");
+ if (file) {
+ fclose(file);
+ result = gedcom_parse_file(NEW_MODEL_FILE);
+ }
+ else {
+ char* filename = (char*) malloc(strlen(PKGDATADIR) + strlen(NEW_MODEL_FILE)
+ + 2);
+ if (!filename)
+ MEMORY_ERROR;
+ else {
+ sprintf(filename, "%s/%s", PKGDATADIR, NEW_MODEL_FILE);
+ result = gedcom_parse_file(filename);
+ free(filename);
+ }
+ }
+ return result;
+}
+
+int gedcom_check_version(int major, int minor, int patch)
+{
+ if (major < GEDCOM_PARSE_VERSION_MAJOR)
+ return 1;
+ else if (major > GEDCOM_PARSE_VERSION_MAJOR)
+ return 0;
+ else if (minor < GEDCOM_PARSE_VERSION_MINOR)
+ return 1;
+ else if (minor > GEDCOM_PARSE_VERSION_MINOR)
+ return 0;
+ else if (patch <= GEDCOM_PARSE_VERSION_PATCH)
+ return 1;
+ else
+ return 0;
+}
projects / gedcom-parse.git / blobdiff