parse.c File Reference

#include "gwlib/gwlib.h"

Go to the source code of this file.

Data Structures
struct	context

Functions
ParseContext *	parse_context_create (Octstr *str)
void	parse_context_destroy (ParseContext *context)
int	parse_error (ParseContext *context)
void	parse_clear_error (ParseContext *context)
void	parse_set_error (ParseContext *context)
int	parse_limit (ParseContext *context, long length)
int	parse_pop_limit (ParseContext *context)
long	parse_octets_left (ParseContext *context)
int	parse_skip (ParseContext *context, long count)
void	parse_skip_to_limit (ParseContext *context)
int	parse_skip_to (ParseContext *context, long pos)
int	parse_peek_char (ParseContext *context)
int	parse_get_char (ParseContext *context)
Octstr *	parse_get_octets (ParseContext *context, long length)
unsigned long	parse_get_uintvar (ParseContext *context)
Octstr *	parse_get_nul_string (ParseContext *context)
Octstr *	parse_get_line (ParseContext *context)
Octstr *	parse_get_seperated_block (ParseContext *context, Octstr *seperator)
Octstr *	parse_get_rest (ParseContext *context)

Function Documentation

parse_clear_error()

void parse_clear_error

(

ParseContext *

context

)

Definition at line 107 of file parse.c.

References context::error, and gw_assert().

Referenced by unpack_range_value().

{
    gw_assert(context != NULL);

    context->error = 0;
}

parse_context_create()

ParseContext* parse_context_create

(

Octstr *

str

)

Definition at line 74 of file parse.c.

References context::data, context::error, context::limit, context::limit_stack, octstr_len(), and context::pos.

Referenced by mime_decompile(), mime_entity_body(), mime_something_to_entity(), radius_pdu_unpack(), and wsp_headers_unpack().

{
    ParseContext *result;

    result = gw_malloc(sizeof(*result));
    result->data = str;
    result->pos = 0;
    result->limit = octstr_len(str);
    result->limit_stack = NULL;
    result->error = 0;

    return result;
}

parse_context_destroy()

void parse_context_destroy

(

ParseContext *

context

)

Definition at line 88 of file parse.c.

References gw_assert(), gwlist_destroy(), gwlist_extract_first(), gwlist_len(), and context::limit_stack.

Referenced by mime_entity_body(), mime_something_to_entity(), radius_pdu_unpack(), and wsp_headers_unpack().

{
    gw_assert(context != NULL);

    if (context->limit_stack) {
        while (gwlist_len(context->limit_stack) > 0)
            gw_free(gwlist_extract_first(context->limit_stack));
        gwlist_destroy(context->limit_stack, NULL);
    }
    gw_free(context);
}

parse_error()

int parse_error

(

ParseContext *

context

)

Definition at line 100 of file parse.c.

References context::error, and gw_assert().

Referenced by parse_client_specifier(), proxy_unpack_credentials(), receive_push_reply(), unpack_accept_language_general_form(), unpack_broken_parameters(), unpack_cache_directive(), unpack_credentials(), unpack_field_name(), unpack_multi_octet_integer(), unpack_parameter(), unpack_range_value(), unpack_warning_value(), wsp_headers_unpack(), wsp_unpack_accept_charset_general_form(), wsp_unpack_accept_general_form(), wsp_unpack_all_parameters(), wsp_unpack_app_header(), and wsp_unpack_well_known_field().

{
    gw_assert(context != NULL);

    return context->error;
}

parse_get_char()

int parse_get_char

(

ParseContext *

context

)

Definition at line 218 of file parse.c.

References context::data, context::error, gw_assert(), context::limit, octstr_get_char(), and context::pos.

Referenced by radius_pdu_unpack(), unpack_disposition(), unpack_encoding_version(), unpack_multi_octet_integer(), unpack_q_value(), unpack_range_value(), unpack_retry_after(), wsp_field_value(), wsp_headers_unpack(), wsp_secondary_field_value(), wsp_unpack_date_value(), and wsp_unpack_integer_value().

{
    gw_assert(context != NULL);

    if (context->pos == context->limit) {
        context->error = 1;
        return -1;
    }

    return octstr_get_char(context->data, context->pos++);
}

parse_get_line()

Octstr* parse_get_line

(

ParseContext *

context

)

Definition at line 282 of file parse.c.

References context::data, context::error, gw_assert(), context::limit, octstr_copy, octstr_search_char(), octstr_strip_crlfs(), and context::pos.

Referenced by mime_something_to_entity(), and read_mime_headers().

{
    Octstr *result;
    long pos;

    gw_assert(context != NULL);

    pos = octstr_search_char(context->data, '\n', context->pos);
    if (pos < 0 || pos >= context->limit) {
        context->error = 1;
        return NULL;
    }
    
    result = octstr_copy(context->data, context->pos, pos - context->pos);
    context->pos = pos + 1;

    octstr_strip_crlfs(result);

    return result;
}

parse_get_nul_string()

Octstr* parse_get_nul_string

(

ParseContext *

context

)

Definition at line 263 of file parse.c.

References context::data, context::error, gw_assert(), context::limit, octstr_copy, octstr_search_char(), and context::pos.

Referenced by proxy_unpack_credentials(), unpack_accept_language_general_form(), unpack_cache_directive(), unpack_challenge(), unpack_credentials(), unpack_field_name(), unpack_parameter(), unpack_warning_value(), wsp_unpack_accept_charset_general_form(), wsp_unpack_accept_general_form(), wsp_unpack_app_header(), and wsp_unpack_well_known_field().

{
    Octstr *result;
    long pos;

    gw_assert(context != NULL);

    pos = octstr_search_char(context->data, 0, context->pos);
    if (pos < 0 || pos >= context->limit) {
        context->error = 1;
        return NULL;
    }

    result = octstr_copy(context->data, context->pos, pos - context->pos);
    context->pos = pos + 1;

    return result;
}

parse_get_octets()

Octstr* parse_get_octets	(	ParseContext *	context,
		long	length
	)

Definition at line 230 of file parse.c.

References context::data, context::error, gw_assert(), context::limit, octstr_copy, and context::pos.

Referenced by mime_decompile(), radius_pdu_unpack(), and wsp_unpack_well_known_field().

{
    Octstr *result;

    gw_assert(context != NULL);

    if (context->pos + length > context->limit) {
        context->error = 1;
        return NULL;
    }

    result = octstr_copy(context->data, context->pos, length);
    context->pos += length;
    return result;
}

parse_get_rest()

Octstr* parse_get_rest

(

ParseContext *

context

)

Definition at line 329 of file parse.c.

References context::data, gw_assert(), octstr_delete(), octstr_duplicate, and context::pos.

Referenced by mime_entity_body(), and mime_something_to_entity().

{
    Octstr *rest;
    
    gw_assert(context != NULL);
    
    octstr_delete(context->data, 0, context->pos);
    rest = octstr_duplicate(context->data);   
    
    return rest;   
}

parse_get_seperated_block()

Octstr* parse_get_seperated_block	(	ParseContext *	context,
		Octstr *	seperator
	)

Definition at line 303 of file parse.c.

References context::data, context::error, gw_assert(), context::limit, octstr_copy, octstr_len(), octstr_search(), and context::pos.

Referenced by mime_something_to_entity().

{
    Octstr *result;
    long spos, epos;

    gw_assert(context != NULL);
    gw_assert(seperator != NULL);

    spos = octstr_search(context->data, seperator, context->pos);
    if (spos < 0 || spos >= context->limit) {
        context->error = 1;
        return NULL;
    }
    epos = octstr_search(context->data, seperator, spos + octstr_len(seperator));
    if (epos < 0 || epos >= context->limit) {
        context->error = 1;
        return NULL;
    }

    spos = spos + octstr_len(seperator);
    result = octstr_copy(context->data, spos, epos - spos);
    context->pos = epos;

    return result;
}

parse_get_uintvar()

unsigned long parse_get_uintvar

(

ParseContext *

context

)

Definition at line 246 of file parse.c.

References context::data, context::error, gw_assert(), context::limit, octstr_extract_uintvar(), and context::pos.

Referenced by mime_decompile(), unpack_range_value(), wsp_field_value(), and wsp_secondary_field_value().

{
    long pos;
    unsigned long value;

    gw_assert(context != NULL);

    pos = octstr_extract_uintvar(context->data, &value, context->pos);
    if (pos < 0 || pos > context->limit) {
        context->error = 1;
        return 0;
    }

    context->pos = pos;
    return value;
}

parse_limit()

int parse_limit	(	ParseContext *	context,
		long	length
	)

Definition at line 121 of file parse.c.

References context::error, gw_assert(), gwlist_create, gwlist_insert(), context::limit, context::limit_stack, and context::pos.

Referenced by wsp_field_value().

{
    long *elem;

    gw_assert(context != NULL);

    if (context->pos + length > context->limit) {
        context->error = 1;
        return -1;
    }

    if (context->limit_stack == NULL)
        context->limit_stack = gwlist_create();

    elem = gw_malloc(sizeof(*elem));
    *elem = context->limit;
    gwlist_insert(context->limit_stack, 0, elem);
    context->limit = context->pos + length;
    return 0;
}

parse_octets_left()

long parse_octets_left

(

ParseContext *

context

)

Definition at line 159 of file parse.c.

References gw_assert(), context::limit, and context::pos.

Referenced by mime_decompile(), unpack_broken_parameters(), unpack_cache_directive(), unpack_challenge(), unpack_optional_q_value(), wsp_headers_unpack(), wsp_unpack_all_parameters(), and wsp_unpack_well_known_field().

{
    gw_assert(context != NULL);

    return context->limit - context->pos;
}

parse_peek_char()

int parse_peek_char

(

ParseContext *

context

)

Definition at line 206 of file parse.c.

References context::data, context::error, gw_assert(), context::limit, octstr_get_char(), and context::pos.

Referenced by proxy_unpack_credentials(), unpack_challenge(), and unpack_credentials().

{
    gw_assert(context != NULL);

    if (context->pos == context->limit) {
        context->error = 1;
        return -1;
    }

    return octstr_get_char(context->data, context->pos);
}

parse_pop_limit()

int parse_pop_limit

(

ParseContext *

context

)

Definition at line 142 of file parse.c.

References context::error, gw_assert(), gwlist_extract_first(), gwlist_len(), context::limit, and context::limit_stack.

Referenced by wsp_skip_field_value(), and wsp_unpack_well_known_field().

{
    long *elem;

    gw_assert(context != NULL);

    if (context->limit_stack == NULL || gwlist_len(context->limit_stack) == 0) {
        context->error = 1;
        return -1;
    }

    elem = gwlist_extract_first(context->limit_stack);
    context->limit = *elem;
    gw_free(elem);
    return 0;
}

parse_set_error()

void parse_set_error

(

ParseContext *

context

)

Definition at line 114 of file parse.c.

References context::error, and gw_assert().

Referenced by unpack_parameter().

{
    gw_assert(context != NULL);

    context->error = 1;
}

parse_skip()

int parse_skip	(	ParseContext *	context,
		long	count
	)

Definition at line 166 of file parse.c.

References context::error, gw_assert(), context::limit, and context::pos.

Referenced by proxy_unpack_credentials(), radius_pdu_unpack(), unpack_challenge(), unpack_credentials(), wsp_field_value(), wsp_headers_unpack(), wsp_secondary_field_value(), and wsp_unpack_well_known_field().

{
    gw_assert(context != NULL);

    if (context->pos + count > context->limit) {
        context->pos = context->limit;
        context->error = 1;
        return -1;
    }

    context->pos += count;
    return 0;
}

parse_skip_to()

int parse_skip_to	(	ParseContext *	context,
		long	pos
	)

Definition at line 187 of file parse.c.

References context::error, gw_assert(), context::limit, and context::pos.

{
    gw_assert(context != NULL);

    if (pos < 0) {
        context->error = 1;
        return -1;
    }

    if (pos > context->limit) {
        context->pos = context->limit;
        context->error = 1;
        return -1;
    }

    context->pos = pos;
    return 0;
}

parse_skip_to_limit()

void parse_skip_to_limit

(

ParseContext *

context

)

Definition at line 180 of file parse.c.

References gw_assert(), context::limit, and context::pos.

Referenced by unpack_parameter(), wsp_skip_field_value(), and wsp_unpack_well_known_field().

{
    gw_assert(context != NULL);

    context->pos = context->limit;
}