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parser.c
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/*
MIT License
Copyright (c) 2023 Joseph Herguth
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include "duckLisp.h"
#ifdef USE_PARENTHESIS_INFERENCE
#include "parenthesis-inferrer.h"
#endif /* USE_PARENTHESIS_INFERENCE */
#include "DuckLib/string.h"
static dl_error_t duckLisp_error_pushSyntax(duckLisp_t *duckLisp,
const dl_uint8_t *message,
const dl_size_t message_length,
const dl_uint8_t *fileName,
const dl_size_t fileName_length,
const dl_uint8_t *source,
const dl_size_t source_length,
const dl_ptrdiff_t start_index,
const dl_ptrdiff_t end_index,
const dl_bool_t throwErrors) {
dl_error_t e = dl_error_ok;
dl_ptrdiff_t line = 1;
dl_ptrdiff_t start_column = 0;
dl_ptrdiff_t end_column = 0;
dl_ptrdiff_t column0Index = 0;
if (!throwErrors) goto cleanup;
if (duckLisp->errors.elements_length > 0) {
e = dl_array_pushElements(&duckLisp->errors, DL_STR("\n"));
if (e) goto cleanup;
}
/* This is inefficient. That should be OK as this is only run a few times max per compile. */
DL_DOTIMES(i, start_index) {
if (source[i] == '\n') {
line++;
start_column = 0;
column0Index = i + 1;
}
else {
start_column++;
}
}
end_column = start_column;
for (dl_ptrdiff_t i = column0Index + start_column; i < (dl_ptrdiff_t) source_length; i++) {
if (source[i] == '\n') {
break;
}
end_column++;
}
e = dl_array_pushElements(&duckLisp->errors, fileName, fileName_length);
if (e) goto cleanup;
e = dl_array_pushElements(&duckLisp->errors, DL_STR(":"));
if (e) goto cleanup;
e = dl_string_fromPtrdiff(&duckLisp->errors, line);
if (e) goto cleanup;
e = dl_array_pushElements(&duckLisp->errors, DL_STR(":"));
if (e) goto cleanup;
e = dl_string_fromPtrdiff(&duckLisp->errors, start_column);
if (e) goto cleanup;
e = dl_array_pushElements(&duckLisp->errors, DL_STR("\n"));
if (e) goto cleanup;
e = dl_array_pushElements(&duckLisp->errors, message, message_length);
if (e) goto cleanup;
e = dl_array_pushElements(&duckLisp->errors, DL_STR("\n"));
if (e) goto cleanup;
e = dl_array_pushElements(&duckLisp->errors, source + column0Index, end_column);
if (e) goto cleanup;
e = dl_array_pushElements(&duckLisp->errors, DL_STR("\n"));
if (e) goto cleanup;
DL_DOTIMES(i, start_column) {
e = dl_array_pushElements(&duckLisp->errors, DL_STR(" "));
if (e) goto cleanup;
}
if (end_index == -1) {
e = dl_array_pushElements(&duckLisp->errors, DL_STR("^"));
if (e) goto cleanup;
}
else {
for (dl_ptrdiff_t i = start_index; i < end_index; i++) {
e = dl_array_pushElements(&duckLisp->errors, DL_STR("^"));
if (e) goto cleanup;
}
}
cleanup: return e;
}
dl_error_t duckLisp_ast_compoundExpression_quit(dl_memoryAllocation_t *memoryAllocation,
duckLisp_ast_compoundExpression_t *compoundExpression);
dl_error_t duckLisp_parse_compoundExpression(duckLisp_t *duckLisp,
#ifdef USE_PARENTHESIS_INFERENCE
const dl_bool_t parenthesisInferenceEnabled,
#endif /* USE_PARENTHESIS_INFERENCE */
const dl_uint8_t *fileName,
const dl_size_t fileName_length,
const dl_uint8_t *source,
const dl_size_t source_length,
duckLisp_ast_compoundExpression_t *compoundExpression,
dl_ptrdiff_t *index,
dl_bool_t throwErrors);
dl_error_t ast_print_compoundExpression(duckLisp_t duckLisp, duckLisp_ast_compoundExpression_t compoundExpression);
static dl_bool_t isIdentifierSymbol(const char character) {
if (dl_string_isSpace(character)) return dl_false;
switch (character) {
case '"': /* Fall through */
case '(': /* Fall through */
case ')': /* Fall through */
case ';':
return dl_false;
default:
return dl_true;
}
}
/* Does not consume the line endings. */
static dl_error_t parse_comment(duckLisp_t *duckLisp,
const dl_uint8_t *source,
const dl_size_t source_length,
duckLisp_ast_compoundExpression_t *compoundExpression,
dl_ptrdiff_t *index,
dl_bool_t throwErrors) {
(void) duckLisp;
(void) compoundExpression;
(void) throwErrors;
dl_ptrdiff_t start_index = *index;
dl_ptrdiff_t stop_index = start_index;
if (source[stop_index] != ';') {
return dl_error_invalidValue;
}
while ((stop_index < (dl_ptrdiff_t) source_length)
&& (source[stop_index] != '\r')
&& (source[stop_index] != '\n')) stop_index++;
*index = stop_index;
return dl_error_ok;
}
dl_error_t parse_irrelevant(duckLisp_t *duckLisp,
const dl_uint8_t *source,
const dl_size_t source_length,
duckLisp_ast_compoundExpression_t *compoundExpression,
dl_ptrdiff_t *index,
dl_bool_t throwErrors) {
(void) duckLisp;
(void) compoundExpression;
(void) throwErrors;
dl_ptrdiff_t indexCopy = *index;
while (dl_true) {
if (indexCopy >= (dl_ptrdiff_t) source_length) {
return dl_error_invalidValue;
}
while (dl_string_isSpace(source[indexCopy])) indexCopy++;
dl_error_t e = parse_comment(dl_null, source, source_length, dl_null, &indexCopy, dl_false);
if (e) break;
}
*index = indexCopy;
return dl_error_ok;
}
void ast_expression_init(duckLisp_ast_expression_t *expression) {
expression->compoundExpressions = dl_null;
expression->compoundExpressions_length = 0;
}
dl_error_t duckLisp_ast_expression_quit(dl_memoryAllocation_t *memoryAllocation,
duckLisp_ast_expression_t *expression) {
dl_error_t e = dl_error_ok;
for (dl_ptrdiff_t i = 0; (dl_size_t) i < expression->compoundExpressions_length; i++) {
e = duckLisp_ast_compoundExpression_quit(memoryAllocation, &expression->compoundExpressions[i]);
if (e) goto cleanup;
}
if (expression->compoundExpressions != dl_null) {
e = dl_free(memoryAllocation, (void **) &expression->compoundExpressions);
}
cleanup:
return e;
}
static dl_error_t parse_literalExpression(duckLisp_t *duckLisp,
#ifdef USE_PARENTHESIS_INFERENCE
const dl_bool_t parenthesisInferenceEnabled,
#endif /* USE_PARENTHESIS_INFERENCE */
const dl_uint8_t *fileName,
const dl_size_t fileName_length,
const dl_uint8_t *source,
const dl_size_t source_length,
duckLisp_ast_compoundExpression_t *compoundExpression,
dl_ptrdiff_t *index,
dl_bool_t throwErrors) {
dl_error_t e = dl_error_ok;
dl_error_t eError = dl_error_ok;
dl_ptrdiff_t start_index = *index;
dl_ptrdiff_t indexCopy = start_index;
duckLisp_ast_expression_t expression;
dl_size_t expressionMemorySize = 0;
expression.compoundExpressions = dl_null;
expression.compoundExpressions_length = 0;
/* Basic syntax checks. Need space for two parentheses and the first character must be a parenthesis. */
if (indexCopy + 3 >= (dl_ptrdiff_t) source_length) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Not an expression: file too short."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
if (source[indexCopy] != '#') {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Expected first character to be '#'."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
start_index++;
indexCopy++;
if (source[indexCopy] != '(') {
e = dl_error_invalidValue;
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Unbalanced parenthesis."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
if (eError) e = eError;
goto cleanup;
}
indexCopy++;
if (indexCopy >= (dl_ptrdiff_t) source_length) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Not an expression: file too short."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
while (dl_true) {
duckLisp_ast_compoundExpression_t subCompoundExpression;
dl_ptrdiff_t subIndex = indexCopy;
if (indexCopy >= (dl_ptrdiff_t) source_length) {
e = dl_error_invalidValue;
/* Definitely an error. Always push the error. */
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Unmatched parenthesis."),
fileName,
fileName_length,
source,
source_length,
-1,
-1,
dl_true);
if (eError) e = eError;
goto cleanup;
}
if (source[indexCopy] == ')') break;
e = duckLisp_parse_compoundExpression(duckLisp,
#ifdef USE_PARENTHESIS_INFERENCE
parenthesisInferenceEnabled,
#endif /* USE_PARENTHESIS_INFERENCE */
fileName,
fileName_length,
source,
source_length,
&subCompoundExpression,
&subIndex,
throwErrors);
if (e) goto cleanup;
dl_size_t newLength = expression.compoundExpressions_length + 1;
if (newLength > expressionMemorySize) {
expressionMemorySize = 2 * newLength;
}
e = DL_REALLOC(duckLisp->memoryAllocation,
&expression.compoundExpressions,
expressionMemorySize,
duckLisp_ast_compoundExpression_t);
if (e) goto cleanup;
expression.compoundExpressions[expression.compoundExpressions_length] = subCompoundExpression;
expression.compoundExpressions_length++;
indexCopy = subIndex;
(void) parse_irrelevant(dl_null, source, source_length, dl_null, &indexCopy, dl_false);
}
indexCopy++;
*index = indexCopy;
cleanup:
compoundExpression->type = duckLisp_ast_type_literalExpression;
compoundExpression->value.expression = expression;
return e;
}
static dl_error_t parse_expression(duckLisp_t *duckLisp,
#ifdef USE_PARENTHESIS_INFERENCE
const dl_bool_t parenthesisInferenceEnabled,
#endif /* USE_PARENTHESIS_INFERENCE */
const dl_uint8_t *fileName,
const dl_size_t fileName_length,
const dl_uint8_t *source,
const dl_size_t source_length,
duckLisp_ast_compoundExpression_t *compoundExpression,
dl_ptrdiff_t *index,
dl_bool_t throwErrors) {
dl_error_t e = dl_error_ok;
dl_error_t eError = dl_error_ok;
dl_ptrdiff_t indexCopy = *index;
duckLisp_ast_expression_t expression;
dl_size_t expressionMemorySize = 0;
expression.compoundExpressions = dl_null;
expression.compoundExpressions_length = 0;
/* Basic syntax checks. Need space for two parentheses and the first character must be a parenthesis. */
if (indexCopy >= (dl_ptrdiff_t) source_length) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Not an expression: file too short."),
fileName,
fileName_length,
source,
source_length,
*index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
if (source[indexCopy] != '(') {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Unbalanced parenthesis."),
fileName,
fileName_length,
source,
source_length,
*index,
indexCopy,
dl_true);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
indexCopy++;
if (indexCopy >= (dl_ptrdiff_t) source_length) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Not an expression: file too short."),
fileName,
fileName_length,
source,
source_length,
*index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
while (dl_true) {
duckLisp_ast_compoundExpression_t subCompoundExpression;
dl_ptrdiff_t subIndex = indexCopy;
if (indexCopy >= (dl_ptrdiff_t) source_length) {
e = dl_error_invalidValue;
/* Definitely an error. Always push the error. */
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Unmatched parenthesis."),
fileName,
fileName_length,
source,
source_length,
-1,
-1,
dl_true);
if (eError) e = eError;
goto cleanup;
}
if (source[indexCopy] == ')') break;
e = duckLisp_parse_compoundExpression(duckLisp,
#ifdef USE_PARENTHESIS_INFERENCE
parenthesisInferenceEnabled,
#endif /* USE_PARENTHESIS_INFERENCE */
fileName,
fileName_length,
source,
source_length,
&subCompoundExpression,
&subIndex,
throwErrors);
if (e) goto cleanup;
dl_size_t newLength = expression.compoundExpressions_length + 1;
if (newLength > expressionMemorySize) {
expressionMemorySize = 2 * newLength;
}
e = DL_REALLOC(duckLisp->memoryAllocation,
&expression.compoundExpressions,
expressionMemorySize,
duckLisp_ast_compoundExpression_t);
if (e) goto cleanup;
expression.compoundExpressions[expression.compoundExpressions_length] = subCompoundExpression;
expression.compoundExpressions_length++;
indexCopy = subIndex;
(void) parse_irrelevant(dl_null, source, source_length, dl_null, &indexCopy, dl_false);
}
indexCopy++;
*index = indexCopy;
cleanup:
compoundExpression->type = duckLisp_ast_type_expression;
compoundExpression->value.expression = expression;
return e;
}
void ast_identifier_init(duckLisp_ast_identifier_t *identifier) {
identifier->value = dl_null;
identifier->value_length = 0;
}
static dl_error_t ast_identifier_quit(dl_memoryAllocation_t *memoryAllocation, duckLisp_ast_identifier_t *identifier) {
(void) memoryAllocation; /* Unused when using native malloc */
dl_error_t e = dl_error_ok;
identifier->value_length = 0;
e = dl_free(memoryAllocation, (void **) &identifier->value);
if (e) {
goto l_cleanup;
}
l_cleanup:
return e;
}
static dl_error_t parse_identifier(duckLisp_t *duckLisp,
#ifdef USE_PARENTHESIS_INFERENCE
const dl_bool_t parenthesisInferenceEnabled,
#endif /* USE_PARENTHESIS_INFERENCE */
const dl_uint8_t *fileName,
const dl_size_t fileName_length,
const dl_uint8_t *source,
const dl_size_t source_length,
duckLisp_ast_compoundExpression_t *compoundExpression,
dl_ptrdiff_t *index,
dl_bool_t throwErrors) {
dl_error_t e = dl_error_ok;
dl_error_t eError = dl_error_ok;
#ifdef USE_PARENTHESIS_INFERENCE
(void) parenthesisInferenceEnabled;
#endif /* USE_PARENTHESIS_INFERENCE */
dl_ptrdiff_t start_index = *index;
dl_ptrdiff_t indexCopy = start_index;
dl_ptrdiff_t stop_index = start_index;
dl_bool_t tempBool;
if (indexCopy >= (dl_ptrdiff_t) source_length) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Unexpected end of file in identifier."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
tempBool = isIdentifierSymbol(source[indexCopy]);
if (!tempBool) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Expected an alpha or allowed symbol in identifier."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
indexCopy++;
while ((indexCopy < (dl_ptrdiff_t) source_length) && isIdentifierSymbol(source[indexCopy])) {
indexCopy++;
}
stop_index = indexCopy;
duckLisp_ast_identifier_t identifier;
identifier.value_length = 0;
dl_size_t length = stop_index - start_index;
e = dl_malloc(duckLisp->memoryAllocation, (void **) &identifier.value, length * sizeof(char));
if (e) goto cleanup;
(void) dl_memcopy_noOverlap(identifier.value, &source[start_index], length);
identifier.value_length = length;
compoundExpression->type = duckLisp_ast_type_identifier;
compoundExpression->value.identifier = identifier;
*index = stop_index;
cleanup: return e;
}
static dl_error_t parse_callback(duckLisp_t *duckLisp,
#ifdef USE_PARENTHESIS_INFERENCE
const dl_bool_t parenthesisInferenceEnabled,
#endif /* USE_PARENTHESIS_INFERENCE */
const dl_uint8_t *fileName,
const dl_size_t fileName_length,
const dl_uint8_t *source,
const dl_size_t source_length,
duckLisp_ast_compoundExpression_t *compoundExpression,
dl_ptrdiff_t *index,
dl_bool_t throwErrors) {
#ifdef USE_PARENTHESIS_INFERENCE
(void) parenthesisInferenceEnabled;
#endif /* USE_PARENTHESIS_INFERENCE */
dl_error_t e = dl_error_ok;
dl_error_t eError = dl_error_ok;
dl_ptrdiff_t start_index = *index;
dl_ptrdiff_t indexCopy = start_index;
dl_ptrdiff_t stop_index = start_index;
if (indexCopy >= (dl_ptrdiff_t) source_length) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Unexpected end of file in identifier."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
if (source[indexCopy] != '#') {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Expected first character to be '#'."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
start_index++;
indexCopy++;
while ((indexCopy < (dl_ptrdiff_t) source_length)
&& (dl_string_isAlpha(source[indexCopy])
|| dl_string_isDigit(source[indexCopy])
|| isIdentifierSymbol(source[indexCopy]))) {
indexCopy++;
}
stop_index = indexCopy;
duckLisp_ast_identifier_t identifier;
identifier.value_length = 0;
dl_size_t length = stop_index - start_index;
e = dl_malloc(duckLisp->memoryAllocation, (void **) &identifier.value, length * sizeof(char));
if (e) goto cleanup;
(void) dl_memcopy_noOverlap(identifier.value, &source[start_index], length);
identifier.value_length = length;
compoundExpression->type = duckLisp_ast_type_identifier;
compoundExpression->value.identifier = identifier;
*index = stop_index;
cleanup: return e;
}
void ast_bool_init(duckLisp_ast_bool_t *boolean) {
boolean->value = dl_false;
}
static void ast_bool_quit(dl_memoryAllocation_t *memoryAllocation, duckLisp_ast_bool_t *boolean) {
(void) memoryAllocation;
boolean->value = dl_false;
}
static dl_error_t parse_bool(duckLisp_t *duckLisp,
#ifdef USE_PARENTHESIS_INFERENCE
const dl_bool_t parenthesisInferenceEnabled,
#endif /* USE_PARENTHESIS_INFERENCE */
const dl_uint8_t *fileName,
const dl_size_t fileName_length,
const dl_uint8_t *source,
const dl_size_t source_length,
duckLisp_ast_compoundExpression_t *compoundExpression,
dl_ptrdiff_t *index,
dl_bool_t throwErrors) {
dl_error_t e = dl_error_ok;
dl_error_t eError = dl_error_ok;
#ifdef USE_PARENTHESIS_INFERENCE
(void) parenthesisInferenceEnabled;
#endif /* USE_PARENTHESIS_INFERENCE */
dl_ptrdiff_t start_index = *index;
dl_ptrdiff_t indexCopy = start_index;
dl_ptrdiff_t stop_index = start_index;
dl_bool_t tempBool;
const dl_size_t sizeOfTrue = sizeof("true") - 1;
const dl_size_t sizeOfFalse = sizeof("false") - 1;
if (source_length <= indexCopy + sizeOfTrue) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Encountered EOF"),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
(void) dl_string_compare_partial(&tempBool, &source[indexCopy], DL_STR("true"));
if (tempBool) {
stop_index += sizeOfTrue;
}
else {
if (source_length <= indexCopy + sizeOfFalse) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Encountered EOF"),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
(void) dl_string_compare_partial(&tempBool, &source[indexCopy], DL_STR("false"));
if (tempBool) {
stop_index += sizeOfFalse;
}
else {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Expected a \"true\" or \"false\" in boolean."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
}
duckLisp_ast_bool_t boolean;
e = dl_string_toBool(&boolean.value, &source[start_index], stop_index - start_index);
if (e) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Could not convert token to bool."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
compoundExpression->type = duckLisp_ast_type_bool;
compoundExpression->value.boolean = boolean;
*index = stop_index;
cleanup:
return e;
}
void ast_int_init(duckLisp_ast_integer_t *integer) {
integer->value = 0;
}
static void ast_int_quit(dl_memoryAllocation_t *memoryAllocation, duckLisp_ast_integer_t *integer) {
(void) memoryAllocation;
integer->value = 0;
}
static dl_error_t parse_int(duckLisp_t *duckLisp,
#ifdef USE_PARENTHESIS_INFERENCE
const dl_bool_t parenthesisInferenceEnabled,
#endif /* USE_PARENTHESIS_INFERENCE */
const dl_uint8_t *fileName,
const dl_size_t fileName_length,
const dl_uint8_t *source,
const dl_size_t source_length,
duckLisp_ast_compoundExpression_t *compoundExpression,
dl_ptrdiff_t *index,
dl_bool_t throwErrors) {
dl_error_t e = dl_error_ok;
dl_error_t eError = dl_error_ok;
#ifdef USE_PARENTHESIS_INFERENCE
(void) parenthesisInferenceEnabled;
#endif /* USE_PARENTHESIS_INFERENCE */
dl_ptrdiff_t start_index = *index;
dl_ptrdiff_t indexCopy = start_index;
dl_ptrdiff_t stop_index = start_index;
dl_bool_t tempBool;
dl_bool_t hexadecimal = dl_false;
duckLisp_ast_integer_t integer;
integer.value = 0;
if (indexCopy >= (dl_ptrdiff_t) source_length) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Unexpected end of file in integer."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
if (source[indexCopy] == '-') {
indexCopy++;
if (indexCopy >= (dl_ptrdiff_t) source_length) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Unexpected end of file in integer."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
}
if (!dl_string_isDigit(source[indexCopy])) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Expected a digit in integer."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
indexCopy++;
/* Hexadecimal */
if (indexCopy < (dl_ptrdiff_t) source_length) {
if ((source[indexCopy - 1] == '0') && ((source[indexCopy] == 'x') || (source[indexCopy] == 'X'))) {
indexCopy++;
hexadecimal = dl_true;
if (!dl_string_isHexadecimalDigit(source[indexCopy])) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Expected a digit in integer."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
indexCopy++;
}
}
while (indexCopy < (dl_ptrdiff_t) source_length) {
if (!isIdentifierSymbol(source[indexCopy])) break;
if (hexadecimal) {
tempBool = dl_string_isHexadecimalDigit(source[indexCopy]);
}
else {
tempBool = dl_string_isDigit(source[indexCopy]);
}
if (!tempBool) {
e = dl_error_invalidValue;
goto cleanup;
}
indexCopy++;
}
stop_index = indexCopy;
e = dl_string_toPtrdiff(&integer.value, &source[start_index], stop_index - start_index);
if (e) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Could not convert token to int."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
compoundExpression->type = duckLisp_ast_type_int;
compoundExpression->value.integer = integer;
*index = stop_index;
cleanup: return e;
}
void ast_float_init(duckLisp_ast_float_t *floatingPoint) {
floatingPoint->value = 0.0;
}
static void ast_float_quit(dl_memoryAllocation_t *memoryAllocation, duckLisp_ast_float_t *floatingPoint) {
(void) memoryAllocation;
floatingPoint->value = 0.0;
}
static dl_error_t parse_float(duckLisp_t *duckLisp,
#ifdef USE_PARENTHESIS_INFERENCE
const dl_bool_t parenthesisInferenceEnabled,
#endif /* USE_PARENTHESIS_INFERENCE */
const dl_uint8_t *fileName,
const dl_size_t fileName_length,
const dl_uint8_t *source,
const dl_size_t source_length,
duckLisp_ast_compoundExpression_t *compoundExpression,
dl_ptrdiff_t *index,
dl_bool_t throwErrors) {
dl_error_t e = dl_error_ok;
dl_error_t eError = dl_error_ok;
#ifdef USE_PARENTHESIS_INFERENCE
(void) parenthesisInferenceEnabled;
#endif /* USE_PARENTHESIS_INFERENCE */
dl_ptrdiff_t start_index = *index;
dl_ptrdiff_t indexCopy = start_index;
dl_ptrdiff_t stop_index = start_index;
dl_bool_t tempBool;
dl_bool_t hasDecimalPointOrExponent = dl_false;
duckLisp_ast_float_t floatingPoint;
if (indexCopy >= (dl_ptrdiff_t) source_length) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Unexpected end of fragment in float."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
if (source[indexCopy] == '-') {
indexCopy++;
if (indexCopy >= (dl_ptrdiff_t) source_length) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Expected a digit after minus sign."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
}
/* Try .1 */
if (source[indexCopy] == '.') {
hasDecimalPointOrExponent = dl_true;
indexCopy++;
if (indexCopy >= (dl_ptrdiff_t) source_length) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Expected a digit after decimal point."),
fileName,
fileName_length,
source,
source_length,
start_index,
indexCopy,
throwErrors);
e = eError ? eError : dl_error_invalidValue;
goto cleanup;
}
tempBool = dl_string_isDigit(source[indexCopy]);
if (!tempBool) {
eError = duckLisp_error_pushSyntax(duckLisp,
DL_STR("Expected digit in float."),
fileName,
fileName_length,
source,