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all lexer except atoi

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This commit is contained in:
hugogogo
2026-04-29 00:27:46 +02:00
parent 5108571deb
commit 52c76767bd
2 changed files with 73 additions and 51 deletions
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102
src/lexer.c
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@@ -11,12 +11,9 @@ static int skip_whitespace(const char *input, int input_pos)
return input_pos;
}
// any single letter is a valid variable, like "x" or "y"
static bool token_is_variable(const char *input, int input_pos, int *token_size)
{
if (input[input_pos] == 'x' || input[input_pos] == 'X')
{
return false;
}
if (ft_isalpha(input[input_pos]))
{
*token_size = 1;
@@ -25,13 +22,13 @@ static bool token_is_variable(const char *input, int input_pos, int *token_size)
return false;
}
// number can be double "123.456"
static bool token_is_number(const char *input, int input_pos, int *token_size)
{
int number_size;
int max_number_size;
int is_number;
if (!ft_isnumber(input[input_pos]))
if (!ft_isdigit(input[input_pos]))
{
return false;
}
@@ -40,14 +37,16 @@ static bool token_is_number(const char *input, int input_pos, int *token_size)
max_number_size = 129; // max size for double double is 128 bits, + the coma
while (number_size <= max_number_size)
{
if (ft_isnumber(input[input_pos + number_size]))
if (ft_isdigit(input[input_pos + number_size]))
{
number_size++;
}
else if (input[input_pos] == '.')
else if (input[input_pos + number_size] == '.')
{
number_size++;
}
else
break;
}
if (number_size > max_number_size)
{
@@ -57,6 +56,23 @@ static bool token_is_number(const char *input, int input_pos, int *token_size)
return true;
}
// power can be "^" and "**"
static bool token_is_power(const char *input, int input_pos, int *token_size)
{
if (input[input_pos] == '^')
{
*token_size = 1;
return true;
}
else if (ft_memcmp(&input[input_pos], "**", 2) == 0)
{
*token_size = 2;
return true;
}
return false;
}
// detect a single "+" is valid
static bool token_is_plus(const char *input, int input_pos, int *token_size)
{
if (input[input_pos] == '+')
@@ -67,47 +83,30 @@ static bool token_is_plus(const char *input, int input_pos, int *token_size)
return false;
}
static bool token_is_plus(const char *input, int input_pos, int *token_size)
{
if (input[input_pos] == '+')
{
*token_size = 1;
return true;
}
return false;
}
static bool token_is_plus(const char *input, int input_pos, int *token_size)
{
if (input[input_pos] == '+')
{
*token_size = 1;
return true;
}
return false;
}
static bool token_is_plus(const char *input, int input_pos, int *token_size)
{
if (input[input_pos] == '+')
{
*token_size = 1;
return true;
}
return false;
}
static bool token_is_plus(const char *input, int input_pos, int *token_size)
{
if (input[input_pos] == '+')
{
*token_size = 1;
return true;
}
return false;
}
static bool token_is_plus(const char *input, int input_pos, int *token_size)
// detect a single "-"
static bool token_is_minus(const char *input, int input_pos, int *token_size)
{
if (input[input_pos] == '-')
{
*token_size = 1;
return true;
}
return false;
}
// detect a single "*"
static bool token_is_multiplication(const char *input, int input_pos, int *token_size)
{
if (input[input_pos] == '*')
{
*token_size = 1;
return true;
}
return false;
}
// detect a single "/"
static bool token_is_division(const char *input, int input_pos, int *token_size)
{
if (input[input_pos] == '+')
{
@@ -117,6 +116,9 @@ static bool token_is_plus(const char *input, int input_pos, int *token_size)
return false;
}
/**
* LEXER
*/
int lexerize(const char *input, token tokens[MAX_TOKENS])
{
int token_count;
@@ -143,7 +145,7 @@ int lexerize(const char *input, token tokens[MAX_TOKENS])
else if (token_is_number(input, input_pos, &token_size))
{
tokens[token_count].type = TOKEN_NUMBER;
tokens[token_count].num_value = ft_atoi(input[input_pos]);
tokens[token_count].num_value = ft_atoi(&input[input_pos]);
}
else if (token_is_power(input, input_pos, &token_size))
{