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parser: cleaned up psycParseRC

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tg(x) 2011-05-09 01:47:06 +02:00
parent b8b8083d9b
commit bc1f3e9083
2 changed files with 36 additions and 32 deletions
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6
include/psyc/parser.h
View file

@ -50,8 +50,6 @@ typedef enum
PSYC_PARSE_ERROR_LENGTH = -2, PSYC_PARSE_ERROR_LENGTH = -2,
/// Error in packet. /// Error in packet.
PSYC_PARSE_ERROR = -1, PSYC_PARSE_ERROR = -1,
// Success, used internally.
PSYC_PARSE_SUCCESS = 0,
/// Buffer contains insufficient amount of data. /// Buffer contains insufficient amount of data.
/// Fill another buffer and concatenate it with the end of the current buffer, /// Fill another buffer and concatenate it with the end of the current buffer,
/// from the cursor position to the end. /// from the cursor position to the end.
@ -90,10 +88,8 @@ typedef enum
/// Content parsing done in one go, value contains the whole content. /// Content parsing done in one go, value contains the whole content.
/// Used when PSYC_PARSE_ROUTING_ONLY is set. /// Used when PSYC_PARSE_ROUTING_ONLY is set.
PSYC_PARSE_CONTENT = 10, PSYC_PARSE_CONTENT = 10,
// Binary value parsing complete, used internally. /// Finished parsing packet.
PSYC_PARSE_COMPLETE = 11, PSYC_PARSE_COMPLETE = 11,
// Binary value parsing incomplete, used internally.
PSYC_PARSE_INCOMPLETE = 12,
} psycParseRC; } psycParseRC;
/** /**

62
src/parser.c
View file

@ -15,6 +15,14 @@
return ret; \ return ret; \
} }
typedef enum {
PARSE_ERROR = -1,
PARSE_SUCCESS = 0,
PARSE_INSUFFICIENT = 1,
PARSE_COMPLETE = 100,
PARSE_INCOMPLETE = 101,
} parseRC;
/** /**
* Determines if the argument is a glyph. * Determines if the argument is a glyph.
* Glyphs are: : = + - ? ! * Glyphs are: : = + - ? !
@ -70,10 +78,10 @@ char isKwChar (uint8_t c)
/** /**
* Parse variable name or method name. * Parse variable name or method name.
* It should contain one or more keyword characters. * It should contain one or more keyword characters.
* @return PSYC_PARSE_ERROR or PSYC_PARSE_SUCCESS * @return PARSE_ERROR or PARSE_SUCCESS
*/ */
static inline static inline
psycParseRC psyc_parseKeyword (psycParseState *state, psycString *name) parseRC psyc_parseKeyword (psycParseState *state, psycString *name)
{ {
name->ptr = state->buffer.ptr + state->cursor; name->ptr = state->buffer.ptr + state->cursor;
name->length = 0; name->length = 0;
@ -84,7 +92,7 @@ psycParseRC psyc_parseKeyword (psycParseState *state, psycString *name)
ADVANCE_CURSOR_OR_RETURN(PSYC_PARSE_INSUFFICIENT); ADVANCE_CURSOR_OR_RETURN(PSYC_PARSE_INSUFFICIENT);
} }
return name->length > 0 ? PSYC_PARSE_SUCCESS : PSYC_PARSE_ERROR; return name->length > 0 ? PARSE_SUCCESS : PARSE_ERROR;
} }
/** /**
@ -95,11 +103,11 @@ psycParseRC psyc_parseKeyword (psycParseState *state, psycString *name)
* @param length Expected length of the data. * @param length Expected length of the data.
* @param parsed Number of bytes parsed so far. * @param parsed Number of bytes parsed so far.
* *
* @return PSYC_PARSE_COMPLETE or PSYC_PARSE_INCOMPLETE * @return PARSE_COMPLETE or PARSE_INCOMPLETE
*/ */
static inline static inline
psycParseRC psyc_parseBinaryValue (psycParseState *state, psycString *value, parseRC psyc_parseBinaryValue (psycParseState *state, psycString *value,
size_t *length, size_t *parsed) size_t *length, size_t *parsed)
{ {
size_t remaining = *length - *parsed; size_t remaining = *length - *parsed;
value->ptr = state->buffer.ptr + state->cursor; value->ptr = state->buffer.ptr + state->cursor;
@ -109,7 +117,7 @@ psycParseRC psyc_parseBinaryValue (psycParseState *state, psycString *value,
value->length = state->buffer.length - state->cursor; value->length = state->buffer.length - state->cursor;
state->cursor += value->length; state->cursor += value->length;
*parsed += value->length; *parsed += value->length;
return PSYC_PARSE_INCOMPLETE; return PARSE_INCOMPLETE;
} }
value->length = remaining; value->length = remaining;
@ -117,24 +125,24 @@ psycParseRC psyc_parseBinaryValue (psycParseState *state, psycString *value,
*parsed += remaining; *parsed += remaining;
assert(*parsed == *length); assert(*parsed == *length);
return PSYC_PARSE_COMPLETE; return PARSE_COMPLETE;
} }
/** /**
* Parse simple or binary variable. * Parse simple or binary variable.
* @return PSYC_PARSE_ERROR or PSYC_PARSE_SUCCESS * @return PARSE_ERROR or PARSE_SUCCESS
*/ */
static inline static inline
psycParseRC psyc_parseModifier (psycParseState *state, char *oper, parseRC psyc_parseModifier (psycParseState *state, char *oper,
psycString *name, psycString *value) psycString *name, psycString *value)
{ {
*oper = *(state->buffer.ptr + state->cursor); *oper = *(state->buffer.ptr + state->cursor);
ADVANCE_CURSOR_OR_RETURN(PSYC_PARSE_INSUFFICIENT); ADVANCE_CURSOR_OR_RETURN(PSYC_PARSE_INSUFFICIENT);
psycParseRC ret = psyc_parseKeyword(state, name); parseRC ret = psyc_parseKeyword(state, name);
if (ret == PSYC_PARSE_ERROR) if (ret == PARSE_ERROR)
return PSYC_PARSE_ERROR_MOD_NAME; return PSYC_PARSE_ERROR_MOD_NAME;
else if (ret != PSYC_PARSE_SUCCESS) else if (ret != PARSE_SUCCESS)
return ret; return ret;
size_t length = 0; size_t length = 0;
@ -168,13 +176,13 @@ psycParseRC psyc_parseModifier (psycParseState *state, char *oper,
return PSYC_PARSE_ERROR_MOD_TAB; return PSYC_PARSE_ERROR_MOD_TAB;
if (++(state->cursor) >= state->buffer.length) if (++(state->cursor) >= state->buffer.length)
return length ? PSYC_PARSE_INCOMPLETE : PSYC_PARSE_SUCCESS; // if length=0 we're done return length ? PARSE_INCOMPLETE : PARSE_SUCCESS; // if length=0 we're done
ret = psyc_parseBinaryValue(state, value, &(state->valueLength), &(state->valueParsed)); ret = psyc_parseBinaryValue(state, value, &(state->valueLength), &(state->valueParsed));
if (ret == PSYC_PARSE_INCOMPLETE) if (ret == PARSE_INCOMPLETE)
return ret; return ret;
return PSYC_PARSE_SUCCESS; return PARSE_SUCCESS;
} }
else if (state->buffer.ptr[state->cursor] == '\t') // simple arg else if (state->buffer.ptr[state->cursor] == '\t') // simple arg
{ {
@ -187,7 +195,7 @@ psycParseRC psyc_parseModifier (psycParseState *state, char *oper,
ADVANCE_CURSOR_OR_RETURN(PSYC_PARSE_INSUFFICIENT); ADVANCE_CURSOR_OR_RETURN(PSYC_PARSE_INSUFFICIENT);
} }
return PSYC_PARSE_SUCCESS; return PARSE_SUCCESS;
} }
else else
return PSYC_PARSE_ERROR_MOD_TAB; return PSYC_PARSE_ERROR_MOD_TAB;
@ -206,7 +214,7 @@ psycParseRC psyc_parse (psycParseState *state, char *oper,
PP(("Invalid flag combination")) PP(("Invalid flag combination"))
#endif #endif
psycParseRC ret; // a return value parseRC ret; // a return value
size_t pos = state->cursor; // a cursor position size_t pos = state->cursor; // a cursor position
// Start position of the current line in the buffer // Start position of the current line in the buffer
@ -245,7 +253,7 @@ psycParseRC psyc_parse (psycParseState *state, char *oper,
{ // it is a glyph, so a variable starts here { // it is a glyph, so a variable starts here
ret = psyc_parseModifier(state, oper, name, value); ret = psyc_parseModifier(state, oper, name, value);
state->routingLength += state->cursor - pos; state->routingLength += state->cursor - pos;
return ret == PSYC_PARSE_SUCCESS ? PSYC_PARSE_ROUTING : ret; return ret == PARSE_SUCCESS ? PSYC_PARSE_ROUTING : ret;
} }
else // not a glyph else // not a glyph
{ {
@ -304,7 +312,7 @@ psycParseRC psyc_parse (psycParseState *state, char *oper,
ret = psyc_parseBinaryValue(state, value, &(state->valueLength), &(state->valueParsed)); ret = psyc_parseBinaryValue(state, value, &(state->valueLength), &(state->valueParsed));
state->contentParsed += value->length; state->contentParsed += value->length;
if (ret == PSYC_PARSE_INCOMPLETE) if (ret == PARSE_INCOMPLETE)
return PSYC_PARSE_ENTITY_CONT; return PSYC_PARSE_ENTITY_CONT;
return PSYC_PARSE_ENTITY_END; return PSYC_PARSE_ENTITY_END;
@ -329,9 +337,9 @@ psycParseRC psyc_parse (psycParseState *state, char *oper,
ret = psyc_parseModifier(state, oper, name, value); ret = psyc_parseModifier(state, oper, name, value);
state->contentParsed += state->cursor - pos; state->contentParsed += state->cursor - pos;
if (ret == PSYC_PARSE_INCOMPLETE) if (ret == PARSE_INCOMPLETE)
return PSYC_PARSE_ENTITY_START; return PSYC_PARSE_ENTITY_START;
else if (ret == PSYC_PARSE_SUCCESS) else if (ret == PARSE_SUCCESS)
return PSYC_PARSE_ENTITY; return PSYC_PARSE_ENTITY;
return ret; return ret;
@ -348,9 +356,9 @@ psycParseRC psyc_parse (psycParseState *state, char *oper,
pos = state->cursor; pos = state->cursor;
ret = psyc_parseKeyword(state, name); ret = psyc_parseKeyword(state, name);
if (ret == PSYC_PARSE_INSUFFICIENT) if (ret == PARSE_INSUFFICIENT)
return ret; return ret;
else if (ret == PSYC_PARSE_SUCCESS) else if (ret == PARSE_SUCCESS)
{ // the method ends with a \n then the data follows { // the method ends with a \n then the data follows
if (state->buffer.ptr[state->cursor] != '\n') if (state->buffer.ptr[state->cursor] != '\n')
return PSYC_PARSE_ERROR_METHOD; return PSYC_PARSE_ERROR_METHOD;
@ -399,7 +407,7 @@ psycParseRC psyc_parse (psycParseState *state, char *oper,
ret = psyc_parseBinaryValue(state, value, &(state->valueLength), &(state->valueParsed)); ret = psyc_parseBinaryValue(state, value, &(state->valueLength), &(state->valueParsed));
state->contentParsed += value->length; state->contentParsed += value->length;
if (ret == PSYC_PARSE_INCOMPLETE) if (ret == PARSE_INCOMPLETE)
return state->valueParsed == value->length ? PSYC_PARSE_BODY_START : PSYC_PARSE_BODY_CONT; return state->valueParsed == value->length ? PSYC_PARSE_BODY_START : PSYC_PARSE_BODY_CONT;
} }
@ -554,7 +562,7 @@ psycParseListRC psyc_parseList (psycParseListState *state, psycString *name,
if (state->elemParsed < state->elemLength) if (state->elemParsed < state->elemLength)
{ {
if (psyc_parseBinaryValue((psycParseState*)state, elem, if (psyc_parseBinaryValue((psycParseState*)state, elem,
&(state->elemLength), &(state->elemParsed)) == PSYC_PARSE_INCOMPLETE) &(state->elemLength), &(state->elemParsed)) == PARSE_INCOMPLETE)
return PSYC_PARSE_LIST_INCOMPLETE; return PSYC_PARSE_LIST_INCOMPLETE;
state->elemLength = 0; state->elemLength = 0;