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feat: finished read_value

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This commit is contained in:
Renge 2022-02-18 22:09:39 -05:00
parent 85112634b2
commit d5b8e66ed3
2 changed files with 598 additions and 41 deletions
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618
hw1/src/argo.c
View File

@ -5,11 +5,27 @@
#include "global.h"
#include "debug.h"
ARGO_VALUE *argo_get_next_value();
char argo_get_next_char(FILE *f);
int argo_get_prev_char(FILE *f);
int print_error_helper();
int argo_read_string(ARGO_STRING *s, FILE *f);
int argo_read_number(ARGO_NUMBER *n, FILE *f);
int argo_read_true(ARGO_BASIC *b, FILE *f);
int argo_read_false(ARGO_BASIC *b, FILE *f);
int argo_read_null(ARGO_BASIC *b, FILE *f);
int argo_read_object(ARGO_OBJECT *o, FILE *f);
int argo_read_object_helper(ARGO_VALUE *v, FILE *f);
int argo_read_array(ARGO_ARRAY *a, FILE *f);
int argo_write_basic(ARGO_BASIC *b, FILE *f);
int argo_write_object(ARGO_VALUE *o, FILE *f);
int argo_write_array(ARGO_VALUE *a, FILE *f);
int argo_write_number_helper(ARGO_STRING *s, FILE *f);
int print_indent(FILE *f);
char latest_char;
int argo_chars_read_prev;
/**
* @brief Read JSON input from a specified input stream, parse it,
* and return a data structure representing the corresponding value.
@ -31,33 +47,160 @@ int print_indent(FILE *f);
* @return A valid pointer if the operation is completely successful,
* NULL if there is any error.
*/
// ARGO_VALUE *argo_read_value(FILE *f) {
// // TO BE IMPLEMENTED.
ARGO_VALUE *argo_read_value(FILE *f)
{
ARGO_VALUE *v = argo_get_next_value();
int i = argo_get_next_char(f);
while (i != EOF)
{
if (argo_is_whitespace(i))
{
i = argo_get_next_char(f);
continue;
}
else if (argo_is_control(i))
{
print_error_helper(i);
return NULL;
}
else if (argo_is_digit(i) || i == '-')
{
argo_get_prev_char(f);
if (argo_read_number(&v->content.number, f))
{
return NULL;
}
else
{
v->type = ARGO_NUMBER_TYPE;
return v;
}
}
else if (i == '{')
{
if (argo_read_object(&v->content.object, f))
{
return NULL;
}
else
{
v->type = ARGO_OBJECT_TYPE;
return v;
};
}
else if (i == '[')
{
if (argo_read_array(&v->content.array, f))
{
return NULL;
}
else
{
v->type = ARGO_ARRAY_TYPE;
return v;
};
}
else if (i == '"')
{
if (argo_read_string(&v->content.string, f))
{
return NULL;
}
else
{
v->type = ARGO_STRING_TYPE;
return v;
};
}
else if (i == 't')
{
if (argo_read_true(&v->content.basic, f))
{
return NULL;
}
else
{
v->type = ARGO_BASIC_TYPE;
return v;
};
}
else if (i == 'f')
{
if (argo_read_false(&v->content.basic, f))
{
return NULL;
}
else
{
v->type = ARGO_BASIC_TYPE;
return v;
}
}
else if (i == 'n')
{
if (argo_read_null(&v->content.basic, f))
{
return NULL;
}
else
{
v->type = ARGO_BASIC_TYPE;
return v;
}
}
else
{
print_error_helper();
return NULL;
}
argo_get_next_char(f);
}
// return NULL;
// }
return NULL;
}
// ARGO_VALUE *argo_read_value_helper(FILE *f, ARGO_VALUE *this) {
// int i = fgetc(f);
// int started = 0;
// while (i != EOF) {
// switch (i)
// {
// case '\b':
// case '\f':
// case '\r':
// case '\t':
// break;
// case '\n':
// argo_lines_read++;
// argo_chars_read = 0;
// default:
// break;
// }
// i = fgetc(f);
// }
// return this;
// }
ARGO_VALUE *argo_get_next_value()
{
ARGO_VALUE *v = argo_value_storage;
if (argo_next_value >= NUM_ARGO_VALUES)
{
fprintf(stderr, "Nums of values exceed the maxium \"%d\" values.", NUM_ARGO_VALUES);
abort();
}
v += argo_next_value++;
return v;
}
int print_error_helper()
{
fprintf(stderr, "Unexpected charactor %c at [%d, %d].", latest_char, argo_lines_read, argo_chars_read);
return -1;
}
char argo_get_next_char(FILE *f)
{
char c = fgetc(f);
latest_char = c;
argo_chars_read_prev = argo_chars_read;
argo_chars_read++;
if (c == '\n')
{
argo_lines_read++;
argo_chars_read = 0;
}
return c;
}
int argo_get_prev_char(FILE *f)
{
char c = ungetc(latest_char, f);
argo_chars_read--;
if (c == '\n')
{
argo_lines_read--;
argo_chars_read = argo_chars_read_prev;
}
return 0;
}
/**
* @brief Read JSON input from a specified input stream, attempt to
@ -77,10 +220,83 @@ int print_indent(FILE *f);
* @return Zero if the operation is completely successful,
* nonzero if there is any error.
*/
// int argo_read_string(ARGO_STRING *s, FILE *f) {
// TO BE IMPLEMENTED.
// abort();
// }
int argo_read_string(ARGO_STRING *s, FILE *f)
{
ARGO_CHAR c = argo_get_next_char(f);
while (c != EOF)
{
if (argo_is_control(c))
{
print_error_helper();
}
if (c == '"')
{
break;
}
if (c == '\\')
{
c = argo_get_next_char(f);
int tmp = 0, value = 0;
switch (c)
{
case '/':
c = '/';
break;
case '"':
c = '"';
break;
case '\\':
c = '\\';
break;
case 'b':
c = '\b';
break;
case 'f':
c = '\f';
break;
case 'n':
c = '\n';
break;
case 'r':
c = '\r';
break;
case 't':
c = '\t';
break;
case 'u':
for (size_t i = 0; i < 4; i++)
{
c = argo_get_next_char(f);
if (!argo_is_hex(c))
{
print_error_helper();
}
if (argo_is_digit(c))
{
tmp = c - '0';
}
else if (c <= 'f' && c >= 'a')
{
tmp = c - 'a' + 10;
}
else
{
tmp = c - 'A' + 10;
}
value = value * 16 + tmp;
}
c = value;
break;
default:
break;
}
}
argo_append_char(s, c);
c = argo_get_next_char(f);
}
return 0;
}
/**
* @brief Read JSON input from a specified input stream, attempt to
@ -104,10 +320,329 @@ int print_indent(FILE *f);
* @return Zero if the operation is completely successful,
* nonzero if there is any error.
*/
// int argo_read_number(ARGO_NUMBER *n, FILE *f) {
// TO BE IMPLEMENTED.
// abort();
// }
int argo_read_number(ARGO_NUMBER *n, FILE *f)
{
int has_exp = 0, num_started = 0, exp_started = 0, has_separator = 0, valid_int = 1, valid_float = 1, valid_string = 1, num_is_positive = 1, digits_after_separator = 0;
long int_value = 0;
double float_value = 0;
ARGO_CHAR *string_value = argo_digits;
size_t length = 0;
char c = argo_get_next_char(f);
while (1)
{
if (!(argo_is_digit(c) || c == '+' || c == '-' || c == 'e' || c == 'E' || c == '.'))
{
break;
}
if (length < 9)
{
ARGO_CHAR *ptr = string_value;
ptr += length;
*ptr = c;
length++;
}
else
{
valid_string = 0;
}
if (argo_is_digit(c))
{
if (valid_int)
{
int_value = int_value * 10 + (c - '0');
if (num_started && int_value == 0 && c == '0')
{
return print_error_helper();
}
}
if (valid_float)
{
if (has_separator)
{
digits_after_separator++;
float_value += (c - '0') / (10 ^ digits_after_separator);
}
else
{
float_value = float_value + 10 + (c - '0');
}
}
}
switch (c)
{
case '-':
if (!num_started)
{
num_is_positive = -1;
c = argo_get_next_char(f);
continue;
}
else if (has_exp && !exp_started)
{
}
else
{
return print_error_helper();
}
break;
case '+':
if (has_exp && !exp_started)
{
}
else
{
return print_error_helper();
}
break;
case 'e':
case 'E':
if (has_exp)
{
return print_error_helper();
}
valid_float = 0;
valid_int = 0;
has_exp = 1;
c = argo_get_next_char(f);
continue;
break;
case '.':
if (has_separator)
{
return print_error_helper();
}
valid_int = 0;
has_separator = 1;
break;
default:
break;
}
num_started = 1;
if (has_exp)
{
exp_started = 1;
}
c = argo_get_next_char(f);
}
if (!valid_int && !valid_float && !valid_string)
{
fprintf(stderr, "num at [%d, %d] is in exponential format and too long(larger than 10 digits", argo_lines_read, argo_chars_read);
}
int_value *= num_is_positive;
float_value *= num_is_positive;
n->int_value = int_value;
n->float_value = float_value;
for (size_t i = 0; i < length; i++)
{
ARGO_CHAR *tmp = string_value;
tmp += (i);
argo_append_char(&n->string_value, *tmp);
}
n->valid_int = valid_int;
n->valid_float = valid_float;
n->valid_string = valid_string;
argo_get_prev_char(f);
return 0;
}
int argo_read_true(ARGO_BASIC *b, FILE *f)
{
char c = argo_get_next_char(f);
if (c == 'r')
{
c = argo_get_next_char(f);
if (c == 'u')
{
c = argo_get_next_char(f);
if (c == 'e')
{
*b = ARGO_TRUE;
return 0;
}
}
}
return print_error_helper();
}
int argo_read_false(ARGO_BASIC *b, FILE *f)
{
char c = argo_get_next_char(f);
if (c == 'a')
{
c = argo_get_next_char(f);
if (c == 'l')
{
c = argo_get_next_char(f);
if (c == 's')
{
if (c == 'e')
{
*b = ARGO_FALSE;
return 0;
}
}
}
}
return print_error_helper();
}
int argo_read_null(ARGO_BASIC *b, FILE *f)
{
char c = argo_get_next_char(f);
if (c == 'u')
{
c = argo_get_next_char(f);
if (c == 'l')
{
c = argo_get_next_char(f);
if (c == 'l')
{
*b = ARGO_NULL;
return 0;
}
}
}
return print_error_helper();
}
int argo_read_object(ARGO_OBJECT *o, FILE *f)
{
char c = argo_get_next_char(f);
o->member_list = argo_get_next_value();
ARGO_VALUE *starter = o->member_list;
starter->type = ARGO_NO_TYPE;
starter->next = starter;
starter->prev = starter;
ARGO_VALUE *prev = starter;
ARGO_VALUE *next = argo_get_next_value();
while (1)
{
while (argo_is_whitespace(c))
{
c = argo_get_next_char(f);
}
if (c == '}')
{
break;
}
else if (c == '\"')
{
if (argo_read_string(&next->name, f))
{
return -1;
}
}
else
{
return -1;
}
c = argo_get_next_char(f);
while (argo_is_whitespace(c))
{
c = argo_get_next_char(f);
}
if (c != ':')
{
return -1;
}
if (argo_read_object_helper(next, f))
{
return -1;
}
next->prev = prev;
prev->next = next;
next->next = starter;
starter->prev = next;
prev = next;
next = argo_get_next_value();
c = argo_get_next_char(f);
while (argo_is_whitespace(c))
{
c = argo_get_next_char(f);
}
if (c == '}')
{
break;
}
else if (c == ',')
{
c = argo_get_next_char(f);
continue;
}
}
return 0;
}
int argo_read_object_helper(ARGO_VALUE *v, FILE *f)
{
ARGO_VALUE *tmp = argo_read_value(f);
if (tmp == NULL)
{
return -1;
}
v->type = tmp->type;
v->content = tmp->content;
return 0;
}
int argo_read_array(ARGO_ARRAY *a, FILE *f)
{
char c = argo_get_next_char(f);
a->element_list = argo_get_next_value();
ARGO_VALUE *starter = a->element_list;
starter->type = ARGO_NO_TYPE;
starter->next = starter;
starter->prev = starter;
ARGO_VALUE *prev = starter;
ARGO_VALUE *next = argo_get_next_value();
while (1)
{
while (argo_is_whitespace(c))
{
c = argo_get_next_char(f);
}
if (c == ']')
{
break;
}
else {
argo_get_prev_char(f);
}
if (argo_read_object_helper(next, f))
{
return -1;
}
next->prev = prev;
prev->next = next;
next->next = starter;
starter->prev = next;
prev = next;
next = argo_get_next_value();
c = argo_get_next_char(f);
while (argo_is_whitespace(c))
{
c = argo_get_next_char(f);
}
if (c == ']')
{
break;
}
else if (c == ',')
{
c = argo_get_next_char(f);
continue;
}
}
return 0;
}
/**
* @brief Write canonical JSON representing a specified value to
@ -127,22 +662,22 @@ int argo_write_value(ARGO_VALUE *v, FILE *f)
switch (v->type)
{
case ARGO_BASIC_TYPE:
argo_write_basic(&v->content.basic, f);
return argo_write_basic(&v->content.basic, f);
break;
case ARGO_NUMBER_TYPE:
argo_write_number(&v->content.number, f);
return argo_write_number(&v->content.number, f);
break;
case ARGO_STRING_TYPE:
argo_write_string(&v->content.string, f);
return argo_write_string(&v->content.string, f);
break;
case ARGO_OBJECT_TYPE:
argo_write_object(v->content.object.member_list, f);
return argo_write_object(v->content.object.member_list, f);
break;
case ARGO_ARRAY_TYPE:
argo_write_array(v->content.array.element_list, f);
return argo_write_array(v->content.array.element_list, f);
break;
default:
abort();
return 1;
break;
}
return 0;
@ -382,6 +917,11 @@ int argo_write_object(ARGO_VALUE *o, FILE *f)
{
argo_write_string(&ptr->next->name, f);
fprintf(f, ":");
if (global_options & PRETTY_PRINT_OPTION)
{
fprintf(f, " ");
}
argo_write_value(ptr->next, f);
ptr = ptr->next;
if (ptr->next->type != ARGO_NO_TYPE)

21
hw1/src/main.c
View File

@ -25,19 +25,36 @@ int main(int argc, char **argv)
USAGE(*argv, EXIT_SUCCESS);
else if (global_options == VALIDATE_OPTION)
{
argo_read_value(stdin);
ARGO_VALUE *json = argo_read_value(stdin);
if (json == NULL)
{
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
else if (global_options == CANONICALIZE_OPTION)
{
ARGO_VALUE *json = argo_read_value(stdin);
if (json == NULL)
{
return EXIT_FAILURE;
}
argo_write_value(json, stdout);
return EXIT_SUCCESS;
}
else if (global_options & PRETTY_PRINT_OPTION)
{
ARGO_VALUE *json = argo_read_value(stdin);
argo_write_value(json, stdout);
if (json == NULL)
{
return EXIT_FAILURE;
}
if (argo_write_value(json, stdout)) {
return EXIT_FAILURE;
}
fprintf(stdout, "\n");
return EXIT_SUCCESS;
}
// TO BE IMPLEMENTED