+++ /dev/null
-/*
- * PROJECT: .inf file parser
- * LICENSE: GPL - See COPYING in the top level directory
- * PROGRAMMER: Royce Mitchell III
- * Eric Kohl
- * Ge van Geldorp <gvg@reactos.org>
- */
-
-/* INCLUDES *****************************************************************/
-
-#include "inflib.h"
-
-#define NDEBUG
-#include <debug.h>
-
-#define CONTROL_Z '\x1a'
-#define MAX_SECTION_NAME_LEN 255
-#define MAX_FIELD_LEN 511 /* larger fields get silently truncated */
-/* actual string limit is MAX_INF_STRING_LENGTH+1 (plus terminating null) under Windows */
-#define MAX_STRING_LEN (MAX_INF_STRING_LENGTH+1)
-
-
-/* parser definitions */
-
-enum parser_state
-{
- LINE_START, /* at beginning of a line */
- SECTION_NAME, /* parsing a section name */
- KEY_NAME, /* parsing a key name */
- VALUE_NAME, /* parsing a value name */
- EOL_BACKSLASH, /* backslash at end of line */
- QUOTES, /* inside quotes */
- LEADING_SPACES, /* leading spaces */
- TRAILING_SPACES, /* trailing spaces */
- COMMENT, /* inside a comment */
- NB_PARSER_STATES
-};
-
-struct parser
-{
- const WCHAR *start; /* start position of item being parsed */
- const WCHAR *end; /* end of buffer */
- PINFCACHE file; /* file being built */
- enum parser_state state; /* current parser state */
- enum parser_state stack[4]; /* state stack */
- int stack_pos; /* current pos in stack */
-
- PINFCACHESECTION cur_section; /* pointer to the section being parsed*/
- PINFCACHELINE line; /* current line */
- unsigned int line_pos; /* current line position in file */
- INFSTATUS error; /* error code */
- unsigned int token_len; /* current token len */
- WCHAR token[MAX_FIELD_LEN+1]; /* current token */
-};
-
-typedef const WCHAR * (*parser_state_func)( struct parser *parser, const WCHAR *pos );
-
-/* parser state machine functions */
-static const WCHAR *line_start_state( struct parser *parser, const WCHAR *pos );
-static const WCHAR *section_name_state( struct parser *parser, const WCHAR *pos );
-static const WCHAR *key_name_state( struct parser *parser, const WCHAR *pos );
-static const WCHAR *value_name_state( struct parser *parser, const WCHAR *pos );
-static const WCHAR *eol_backslash_state( struct parser *parser, const WCHAR *pos );
-static const WCHAR *quotes_state( struct parser *parser, const WCHAR *pos );
-static const WCHAR *leading_spaces_state( struct parser *parser, const WCHAR *pos );
-static const WCHAR *trailing_spaces_state( struct parser *parser, const WCHAR *pos );
-static const WCHAR *comment_state( struct parser *parser, const WCHAR *pos );
-
-static const parser_state_func parser_funcs[NB_PARSER_STATES] =
-{
- line_start_state, /* LINE_START */
- section_name_state, /* SECTION_NAME */
- key_name_state, /* KEY_NAME */
- value_name_state, /* VALUE_NAME */
- eol_backslash_state, /* EOL_BACKSLASH */
- quotes_state, /* QUOTES */
- leading_spaces_state, /* LEADING_SPACES */
- trailing_spaces_state, /* TRAILING_SPACES */
- comment_state /* COMMENT */
-};
-
-
-/* PRIVATE FUNCTIONS ********************************************************/
-
-static PINFCACHELINE
-InfpFreeLine (PINFCACHELINE Line)
-{
- PINFCACHELINE Next;
- PINFCACHEFIELD Field;
-
- if (Line == NULL)
- {
- return NULL;
- }
-
- Next = Line->Next;
- if (Line->Key != NULL)
- {
- FREE (Line->Key);
- Line->Key = NULL;
- }
-
- /* Remove data fields */
- while (Line->FirstField != NULL)
- {
- Field = Line->FirstField->Next;
- FREE (Line->FirstField);
- Line->FirstField = Field;
- }
- Line->LastField = NULL;
-
- FREE (Line);
-
- return Next;
-}
-
-
-PINFCACHESECTION
-InfpFreeSection (PINFCACHESECTION Section)
-{
- PINFCACHESECTION Next;
-
- if (Section == NULL)
- {
- return NULL;
- }
-
- /* Release all keys */
- Next = Section->Next;
- while (Section->FirstLine != NULL)
- {
- Section->FirstLine = InfpFreeLine (Section->FirstLine);
- }
- Section->LastLine = NULL;
-
- FREE (Section);
-
- return Next;
-}
-
-
-PINFCACHESECTION
-InfpFindSection(PINFCACHE Cache,
- PCWSTR Name)
-{
- PINFCACHESECTION Section = NULL;
-
- if (Cache == NULL || Name == NULL)
- {
- return NULL;
- }
-
- /* iterate through list of sections */
- Section = Cache->FirstSection;
- while (Section != NULL)
- {
- if (strcmpiW(Section->Name, Name) == 0)
- {
- return Section;
- }
-
- /* get the next section*/
- Section = Section->Next;
- }
-
- return NULL;
-}
-
-
-PINFCACHESECTION
-InfpAddSection(PINFCACHE Cache,
- PCWSTR Name)
-{
- PINFCACHESECTION Section = NULL;
- ULONG Size;
-
- if (Cache == NULL || Name == NULL)
- {
- DPRINT("Invalid parameter\n");
- return NULL;
- }
-
- /* Allocate and initialize the new section */
- Size = (ULONG)FIELD_OFFSET(INFCACHESECTION,
- Name[strlenW(Name) + 1]);
- Section = (PINFCACHESECTION)MALLOC(Size);
- if (Section == NULL)
- {
- DPRINT("MALLOC() failed\n");
- return NULL;
- }
- ZEROMEMORY (Section,
- Size);
-
- /* Copy section name */
- strcpyW(Section->Name, Name);
-
- /* Append section */
- if (Cache->FirstSection == NULL)
- {
- Cache->FirstSection = Section;
- Cache->LastSection = Section;
- }
- else
- {
- Cache->LastSection->Next = Section;
- Section->Prev = Cache->LastSection;
- Cache->LastSection = Section;
- }
-
- return Section;
-}
-
-
-PINFCACHELINE
-InfpAddLine(PINFCACHESECTION Section)
-{
- PINFCACHELINE Line;
-
- if (Section == NULL)
- {
- DPRINT("Invalid parameter\n");
- return NULL;
- }
-
- Line = (PINFCACHELINE)MALLOC(sizeof(INFCACHELINE));
- if (Line == NULL)
- {
- DPRINT("MALLOC() failed\n");
- return NULL;
- }
- ZEROMEMORY(Line,
- sizeof(INFCACHELINE));
-
- /* Append line */
- if (Section->FirstLine == NULL)
- {
- Section->FirstLine = Line;
- Section->LastLine = Line;
- }
- else
- {
- Section->LastLine->Next = Line;
- Line->Prev = Section->LastLine;
- Section->LastLine = Line;
- }
- Section->LineCount++;
-
- return Line;
-}
-
-
-PVOID
-InfpAddKeyToLine(PINFCACHELINE Line,
- PCWSTR Key)
-{
- if (Line == NULL)
- {
- DPRINT1("Invalid Line\n");
- return NULL;
- }
-
- if (Line->Key != NULL)
- {
- DPRINT1("Line already has a key\n");
- return NULL;
- }
-
- Line->Key = (PWCHAR)MALLOC((strlenW(Key) + 1) * sizeof(WCHAR));
- if (Line->Key == NULL)
- {
- DPRINT1("MALLOC() failed\n");
- return NULL;
- }
-
- strcpyW(Line->Key, Key);
-
- return (PVOID)Line->Key;
-}
-
-
-PVOID
-InfpAddFieldToLine(PINFCACHELINE Line,
- PCWSTR Data)
-{
- PINFCACHEFIELD Field;
- ULONG Size;
-
- Size = (ULONG)FIELD_OFFSET(INFCACHEFIELD,
- Data[strlenW(Data) + 1]);
- Field = (PINFCACHEFIELD)MALLOC(Size);
- if (Field == NULL)
- {
- DPRINT1("MALLOC() failed\n");
- return NULL;
- }
- ZEROMEMORY (Field,
- Size);
- strcpyW(Field->Data, Data);
-
- /* Append key */
- if (Line->FirstField == NULL)
- {
- Line->FirstField = Field;
- Line->LastField = Field;
- }
- else
- {
- Line->LastField->Next = Field;
- Field->Prev = Line->LastField;
- Line->LastField = Field;
- }
- Line->FieldCount++;
-
- return (PVOID)Field;
-}
-
-
-PINFCACHELINE
-InfpFindKeyLine(PINFCACHESECTION Section,
- PCWSTR Key)
-{
- PINFCACHELINE Line;
-
- Line = Section->FirstLine;
- while (Line != NULL)
- {
- if (Line->Key != NULL && strcmpiW(Line->Key, Key) == 0)
- {
- return Line;
- }
-
- Line = Line->Next;
- }
-
- return NULL;
-}
-
-
-/* push the current state on the parser stack */
-__inline static void push_state( struct parser *parser, enum parser_state state )
-{
-// assert( parser->stack_pos < sizeof(parser->stack)/sizeof(parser->stack[0]) );
- parser->stack[parser->stack_pos++] = state;
-}
-
-
-/* pop the current state */
-__inline static void pop_state( struct parser *parser )
-{
-// assert( parser->stack_pos );
- parser->state = parser->stack[--parser->stack_pos];
-}
-
-
-/* set the parser state and return the previous one */
-__inline static enum parser_state set_state( struct parser *parser, enum parser_state state )
-{
- enum parser_state ret = parser->state;
- parser->state = state;
- return ret;
-}
-
-
-/* check if the pointer points to an end of file */
-__inline static int is_eof( struct parser *parser, const WCHAR *ptr )
-{
- return (ptr >= parser->end || *ptr == CONTROL_Z || *ptr == 0);
-}
-
-
-/* check if the pointer points to an end of line */
-__inline static int is_eol( struct parser *parser, const WCHAR *ptr )
-{
- return (ptr >= parser->end ||
- *ptr == CONTROL_Z ||
- *ptr == '\n' ||
- (*ptr == '\r' && *(ptr + 1) == '\n') ||
- *ptr == 0);
-}
-
-
-/* push data from current token start up to pos into the current token */
-static int push_token( struct parser *parser, const WCHAR *pos )
-{
- UINT len = (UINT)(pos - parser->start);
- const WCHAR *src = parser->start;
- WCHAR *dst = parser->token + parser->token_len;
-
- if (len > MAX_FIELD_LEN - parser->token_len)
- len = MAX_FIELD_LEN - parser->token_len;
-
- parser->token_len += len;
- for ( ; len > 0; len--, dst++, src++)
- {
- if (*src)
- {
- *dst = *src;
- }
- else
- {
- *dst = ' ';
- }
- }
-
- *dst = 0;
- parser->start = pos;
-
- return 0;
-}
-
-
-
-/* add a section with the current token as name */
-static PVOID add_section_from_token( struct parser *parser )
-{
- PINFCACHESECTION Section;
-
- if (parser->token_len > MAX_SECTION_NAME_LEN)
- {
- parser->error = INF_STATUS_SECTION_NAME_TOO_LONG;
- return NULL;
- }
-
- Section = InfpFindSection(parser->file,
- parser->token);
- if (Section == NULL)
- {
- /* need to create a new one */
- Section= InfpAddSection(parser->file,
- parser->token);
- if (Section == NULL)
- {
- parser->error = INF_STATUS_NOT_ENOUGH_MEMORY;
- return NULL;
- }
- }
-
- parser->token_len = 0;
- parser->cur_section = Section;
-
- return (PVOID)Section;
-}
-
-
-/* add a field containing the current token to the current line */
-static struct field *add_field_from_token( struct parser *parser, int is_key )
-{
- PVOID field;
-
- if (!parser->line) /* need to start a new line */
- {
- if (parser->cur_section == NULL) /* got a line before the first section */
- {
- parser->error = INF_STATUS_WRONG_INF_STYLE;
- return NULL;
- }
-
- parser->line = InfpAddLine(parser->cur_section);
- if (parser->line == NULL)
- goto error;
- }
- else
- {
-// assert(!is_key);
- }
-
- if (is_key)
- {
- field = InfpAddKeyToLine(parser->line, parser->token);
- }
- else
- {
- field = InfpAddFieldToLine(parser->line, parser->token);
- }
-
- if (field != NULL)
- {
- parser->token_len = 0;
- return field;
- }
-
-error:
- parser->error = INF_STATUS_NOT_ENOUGH_MEMORY;
- return NULL;
-}
-
-
-/* close the current line and prepare for parsing a new one */
-static void close_current_line( struct parser *parser )
-{
- parser->line = NULL;
-}
-
-
-
-/* handler for parser LINE_START state */
-static const WCHAR *line_start_state( struct parser *parser, const WCHAR *pos )
-{
- const WCHAR *p;
-
- for (p = pos; !is_eof( parser, p ); p++)
- {
- switch(*p)
- {
- case '\r':
- continue;
-
- case '\n':
- parser->line_pos++;
- close_current_line( parser );
- break;
-
- case ';':
- push_state( parser, LINE_START );
- set_state( parser, COMMENT );
- return p + 1;
-
- case '[':
- parser->start = p + 1;
- set_state( parser, SECTION_NAME );
- return p + 1;
-
- default:
- if (!isspaceW(*p))
- {
- parser->start = p;
- set_state( parser, KEY_NAME );
- return p;
- }
- break;
- }
- }
- close_current_line( parser );
- return NULL;
-}
-
-
-/* handler for parser SECTION_NAME state */
-static const WCHAR *section_name_state( struct parser *parser, const WCHAR *pos )
-{
- const WCHAR *p;
-
- for (p = pos; !is_eol( parser, p ); p++)
- {
- if (*p == ']')
- {
- push_token( parser, p );
- if (add_section_from_token( parser ) == NULL)
- return NULL;
- push_state( parser, LINE_START );
- set_state( parser, COMMENT ); /* ignore everything else on the line */
- return p + 1;
- }
- }
- parser->error = INF_STATUS_BAD_SECTION_NAME_LINE; /* unfinished section name */
- return NULL;
-}
-
-
-/* handler for parser KEY_NAME state */
-static const WCHAR *key_name_state( struct parser *parser, const WCHAR *pos )
-{
- const WCHAR *p, *token_end = parser->start;
-
- for (p = pos; !is_eol( parser, p ); p++)
- {
- if (*p == ',') break;
- switch(*p)
- {
-
- case '=':
- push_token( parser, token_end );
- if (!add_field_from_token( parser, 1 )) return NULL;
- parser->start = p + 1;
- push_state( parser, VALUE_NAME );
- set_state( parser, LEADING_SPACES );
- return p + 1;
- case ';':
- push_token( parser, token_end );
- if (!add_field_from_token( parser, 0 )) return NULL;
- push_state( parser, LINE_START );
- set_state( parser, COMMENT );
- return p + 1;
- case '"':
- push_token( parser, token_end );
- parser->start = p + 1;
- push_state( parser, KEY_NAME );
- set_state( parser, QUOTES );
- return p + 1;
- case '\\':
- push_token( parser, token_end );
- parser->start = p;
- push_state( parser, KEY_NAME );
- set_state( parser, EOL_BACKSLASH );
- return p;
- default:
- if (!isspaceW(*p)) token_end = p + 1;
- else
- {
- push_token( parser, p );
- push_state( parser, KEY_NAME );
- set_state( parser, TRAILING_SPACES );
- return p;
- }
- break;
- }
- }
- push_token( parser, token_end );
- set_state( parser, VALUE_NAME );
- return p;
-}
-
-
-/* handler for parser VALUE_NAME state */
-static const WCHAR *value_name_state( struct parser *parser, const WCHAR *pos )
-{
- const WCHAR *p, *token_end = parser->start;
-
- for (p = pos; !is_eol( parser, p ); p++)
- {
- switch(*p)
- {
- case ';':
- push_token( parser, token_end );
- if (!add_field_from_token( parser, 0 )) return NULL;
- push_state( parser, LINE_START );
- set_state( parser, COMMENT );
- return p + 1;
- case ',':
- push_token( parser, token_end );
- if (!add_field_from_token( parser, 0 )) return NULL;
- parser->start = p + 1;
- push_state( parser, VALUE_NAME );
- set_state( parser, LEADING_SPACES );
- return p + 1;
- case '"':
- push_token( parser, token_end );
- parser->start = p + 1;
- push_state( parser, VALUE_NAME );
- set_state( parser, QUOTES );
- return p + 1;
- case '\\':
- push_token( parser, token_end );
- parser->start = p;
- push_state( parser, VALUE_NAME );
- set_state( parser, EOL_BACKSLASH );
- return p;
- default:
- if (!isspaceW(*p)) token_end = p + 1;
- else
- {
- push_token( parser, p );
- push_state( parser, VALUE_NAME );
- set_state( parser, TRAILING_SPACES );
- return p;
- }
- break;
- }
- }
- push_token( parser, token_end );
- if (!add_field_from_token( parser, 0 )) return NULL;
- set_state( parser, LINE_START );
- return p;
-}
-
-
-/* handler for parser EOL_BACKSLASH state */
-static const WCHAR *eol_backslash_state( struct parser *parser, const WCHAR *pos )
-{
- const WCHAR *p;
-
- for (p = pos; !is_eof( parser, p ); p++)
- {
- switch(*p)
- {
- case '\r':
- continue;
-
- case '\n':
- parser->line_pos++;
- parser->start = p + 1;
- set_state( parser, LEADING_SPACES );
- return p + 1;
-
- case '\\':
- continue;
-
- case ';':
- push_state( parser, EOL_BACKSLASH );
- set_state( parser, COMMENT );
- return p + 1;
-
- default:
- if (isspaceW(*p))
- continue;
- push_token( parser, p );
- pop_state( parser );
- return p;
- }
- }
- parser->start = p;
- pop_state( parser );
-
- return p;
-}
-
-
-/* handler for parser QUOTES state */
-static const WCHAR *quotes_state( struct parser *parser, const WCHAR *pos )
-{
- const WCHAR *p, *token_end = parser->start;
-
- for (p = pos; !is_eol( parser, p ); p++)
- {
- if (*p == '"')
- {
- if (p+1 < parser->end && p[1] == '"') /* double quotes */
- {
- push_token( parser, p + 1 );
- parser->start = token_end = p + 2;
- p++;
- }
- else /* end of quotes */
- {
- push_token( parser, p );
- parser->start = p + 1;
- pop_state( parser );
- return p + 1;
- }
- }
- }
- push_token( parser, p );
- pop_state( parser );
- return p;
-}
-
-
-/* handler for parser LEADING_SPACES state */
-static const WCHAR *leading_spaces_state( struct parser *parser, const WCHAR *pos )
-{
- const WCHAR *p;
-
- for (p = pos; !is_eol( parser, p ); p++)
- {
- if (*p == '\\')
- {
- parser->start = p;
- set_state( parser, EOL_BACKSLASH );
- return p;
- }
- if (!isspaceW(*p))
- break;
- }
- parser->start = p;
- pop_state( parser );
- return p;
-}
-
-
-/* handler for parser TRAILING_SPACES state */
-static const WCHAR *trailing_spaces_state( struct parser *parser, const WCHAR *pos )
-{
- const WCHAR *p;
-
- for (p = pos; !is_eol( parser, p ); p++)
- {
- if (*p == '\\')
- {
- set_state( parser, EOL_BACKSLASH );
- return p;
- }
- if (!isspaceW(*p))
- break;
- }
- pop_state( parser );
- return p;
-}
-
-
-/* handler for parser COMMENT state */
-static const WCHAR *comment_state( struct parser *parser, const WCHAR *pos )
-{
- const WCHAR *p = pos;
-
- while (!is_eol( parser, p ))
- p++;
- pop_state( parser );
- return p;
-}
-
-
-/* parse a complete buffer */
-INFSTATUS
-InfpParseBuffer (PINFCACHE file,
- const WCHAR *buffer,
- const WCHAR *end,
- PULONG error_line)
-{
- struct parser parser;
- const WCHAR *pos = buffer;
-
- parser.start = buffer;
- parser.end = end;
- parser.file = file;
- parser.line = NULL;
- parser.state = LINE_START;
- parser.stack_pos = 0;
- parser.cur_section = NULL;
- parser.line_pos = 1;
- parser.error = 0;
- parser.token_len = 0;
-
- /* parser main loop */
- while (pos)
- pos = (parser_funcs[parser.state])(&parser, pos);
-
- if (parser.error)
- {
- if (error_line)
- *error_line = parser.line_pos;
- return parser.error;
- }
-
- /* find the [strings] section */
- file->StringsSection = InfpFindSection(file,
- L"Strings");
-
- return INF_STATUS_SUCCESS;
-}
-
-/* EOF */
projects / reactos.git / blobdiff