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Backport from xs.

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default 2023-09-03 20:22:32 +02:00
parent e3fbb807ff
commit 8535fc84c9
3 changed files with 122 additions and 72 deletions
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7
xs.h
View file

@ -28,9 +28,6 @@ typedef enum {
} xstype; } xstype;
/* dynamic strings */
typedef char d_char;
/* types */ /* types */
typedef char xs_val; typedef char xs_val;
typedef char xs_str; typedef char xs_str;
@ -157,7 +154,7 @@ xs_val xs_stock_dict[] = { XSTYPE_DICT, 0, 0, 5, XSTYPE_EOM };
void *_xs_realloc(void *ptr, size_t size, const char *file, int line, const char *func) void *_xs_realloc(void *ptr, size_t size, const char *file, int line, const char *func)
{ {
d_char *ndata = realloc(ptr, size); xs_val *ndata = realloc(ptr, size);
if (ndata == NULL) { if (ndata == NULL) {
fprintf(stderr, "**OUT OF MEMORY**\n"); fprintf(stderr, "**OUT OF MEMORY**\n");
@ -530,7 +527,7 @@ int xs_starts_and_ends(const char *prefix, const char *str, const char *suffix)
xs_str *xs_crop_i(xs_str *str, int start, int end) xs_str *xs_crop_i(xs_str *str, int start, int end)
/* crops the d_char to be only from start to end */ /* crops the string to be only from start to end */
{ {
XS_ASSERT_TYPE(str, XSTYPE_STRING); XS_ASSERT_TYPE(str, XSTYPE_STRING);

189
xs_json.h
View file

@ -6,8 +6,13 @@
int xs_json_dump(const xs_val *data, int indent, FILE *f); int xs_json_dump(const xs_val *data, int indent, FILE *f);
xs_str *xs_json_dumps(const xs_val *data, int indent); xs_str *xs_json_dumps(const xs_val *data, int indent);
xs_val *xs_json_loads(const xs_str *json);
xs_val *xs_json_load(FILE *f); xs_val *xs_json_load(FILE *f);
xs_val *xs_json_loads(const xs_str *json);
xstype xs_json_load_type(FILE *f);
int xs_json_load_array_iter(FILE *f, xs_val **value, int *c);
int xs_json_load_object_iter(FILE *f, xs_str **key, xs_val **value, int *c);
#ifdef XS_IMPLEMENTATION #ifdef XS_IMPLEMENTATION
@ -176,8 +181,6 @@ int xs_json_dump(const xs_val *data, int indent, FILE *f)
/** JSON loads **/ /** JSON loads **/
/* this code comes mostly from the Minimum Profit Text Editor (MPDM) */
typedef enum { typedef enum {
JS_ERROR = -1, JS_ERROR = -1,
JS_INCOMPLETE, JS_INCOMPLETE,
@ -326,6 +329,40 @@ static xs_val *_xs_json_load_lexer(FILE *f, js_type *t)
static xs_list *_xs_json_load_array(FILE *f); static xs_list *_xs_json_load_array(FILE *f);
static xs_dict *_xs_json_load_object(FILE *f); static xs_dict *_xs_json_load_object(FILE *f);
int xs_json_load_array_iter(FILE *f, xs_val **value, int *c)
{
js_type t;
*value = _xs_json_load_lexer(f, &t);
if (t == JS_ERROR)
return -1;
if (t == JS_CBRACK)
return 0;
if (*c > 0) {
if (t == JS_COMMA)
*value = _xs_json_load_lexer(f, &t);
else
return -1;
}
if (t == JS_OBRACK)
*value = _xs_json_load_array(f);
else
if (t == JS_OCURLY)
*value = _xs_json_load_object(f);
if (*value == NULL)
return -1;
*c = *c + 1;
return 1;
}
static xs_list *_xs_json_load_array(FILE *f) static xs_list *_xs_json_load_array(FILE *f)
/* parses a JSON array */ /* parses a JSON array */
{ {
@ -333,36 +370,63 @@ static xs_list *_xs_json_load_array(FILE *f)
int c = 0; int c = 0;
for (;;) { for (;;) {
js_type tt; xs *v = NULL;
xs *v = _xs_json_load_lexer(f, &tt); int r = xs_json_load_array_iter(f, &v, &c);
if (tt == JS_ERROR) if (r == -1)
break; l = xs_free(l);
if (tt == JS_CBRACK)
return l;
if (c > 0) {
if (tt == JS_COMMA)
v = _xs_json_load_lexer(f, &tt);
else
break;
}
if (tt == JS_OBRACK)
v = _xs_json_load_array(f);
else
if (tt == JS_OCURLY)
v = _xs_json_load_object(f);
if (v == NULL)
break;
if (r == 1)
l = xs_list_append(l, v); l = xs_list_append(l, v);
c++; else
break;
} }
return xs_free(l); return l;
}
int xs_json_load_object_iter(FILE *f, xs_str **key, xs_val **value, int *c)
{
js_type t;
*key = _xs_json_load_lexer(f, &t);
if (t == JS_ERROR)
return -1;
if (t == JS_CCURLY)
return 0;
if (*c > 0) {
if (t == JS_COMMA)
*key = _xs_json_load_lexer(f, &t);
else
return -1;
}
if (t != JS_STRING)
return -1;
xs_free(_xs_json_load_lexer(f, &t));
if (t != JS_COLON)
return -1;
*value = _xs_json_load_lexer(f, &t);
if (t == JS_OBRACK)
*value = _xs_json_load_array(f);
else
if (t == JS_OCURLY)
*value = _xs_json_load_object(f);
if (*value == NULL)
return -1;
*c = *c + 1;
return 1;
} }
@ -375,47 +439,20 @@ static xs_dict *_xs_json_load_object(FILE *f)
d = xs_dict_new(); d = xs_dict_new();
for (;;) { for (;;) {
js_type tt; xs *k = NULL;
xs *k = _xs_json_load_lexer(f, &tt);
xs *v = NULL; xs *v = NULL;
int r = xs_json_load_object_iter(f, &k, &v, &c);
if (tt == JS_ERROR) if (r == -1)
break; d = xs_free(d);
if (tt == JS_CCURLY)
return d;
if (c > 0) {
if (tt == JS_COMMA)
k = _xs_json_load_lexer(f, &tt);
else
break;
}
if (tt != JS_STRING)
break;
xs_free(_xs_json_load_lexer(f, &tt));
if (tt != JS_COLON)
break;
v = _xs_json_load_lexer(f, &tt);
if (tt == JS_OBRACK)
v = _xs_json_load_array(f);
else
if (tt == JS_OCURLY)
v = _xs_json_load_object(f);
if (v == NULL)
break;
if (r == 1)
d = xs_dict_append(d, k, v); d = xs_dict_append(d, k, v);
c++; else
break;
} }
return xs_free(d); return d;
} }
@ -434,18 +471,34 @@ xs_val *xs_json_loads(const xs_str *json)
} }
xstype xs_json_load_type(FILE *f)
/* identifies the type of a JSON stream */
{
xstype t = XSTYPE_NULL;
js_type jt;
xs_free(_xs_json_load_lexer(f, &jt));
if (jt == JS_OBRACK)
t = XSTYPE_LIST;
else
if (jt == JS_OCURLY)
t = XSTYPE_DICT;
return t;
}
xs_val *xs_json_load(FILE *f) xs_val *xs_json_load(FILE *f)
/* loads a JSON file */ /* loads a JSON file */
{ {
xs_val *v = NULL; xs_val *v = NULL;
js_type t; xstype t = xs_json_load_type(f);
xs_free(_xs_json_load_lexer(f, &t)); if (t == XSTYPE_LIST)
if (t == JS_OBRACK)
v = _xs_json_load_array(f); v = _xs_json_load_array(f);
else else
if (t == JS_OCURLY) if (t == XSTYPE_DICT)
v = _xs_json_load_object(f); v = _xs_json_load_object(f);
return v; return v;

2
xs_version.h
View file

@ -1 +1 @@
/* ce9e43569a7dd29a85c807e496c335cc4999bafd */ /* 9a2b91d7713c862ce8753721da2ab5867abb80fd */