From 8535fc84c92e42ca379558b3c0a3a9a2d0faedaa Mon Sep 17 00:00:00 2001 From: default Date: Sun, 3 Sep 2023 20:22:32 +0200 Subject: [PATCH] Backport from xs. --- xs.h | 7 +- xs_json.h | 185 +++++++++++++++++++++++++++++++++------------------ xs_version.h | 2 +- 3 files changed, 122 insertions(+), 72 deletions(-) diff --git a/xs.h b/xs.h index da9e2a7..6ac70bf 100644 --- a/xs.h +++ b/xs.h @@ -28,9 +28,6 @@ typedef enum { } xstype; -/* dynamic strings */ -typedef char d_char; - /* types */ typedef char xs_val; 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) { - d_char *ndata = realloc(ptr, size); + xs_val *ndata = realloc(ptr, size); if (ndata == NULL) { 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) -/* 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); diff --git a/xs_json.h b/xs_json.h index 3df5d53..639b52d 100644 --- a/xs_json.h +++ b/xs_json.h @@ -6,8 +6,13 @@ int xs_json_dump(const xs_val *data, int indent, FILE *f); 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_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 @@ -176,8 +181,6 @@ int xs_json_dump(const xs_val *data, int indent, FILE *f) /** JSON loads **/ -/* this code comes mostly from the Minimum Profit Text Editor (MPDM) */ - typedef enum { JS_ERROR = -1, 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_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) /* parses a JSON array */ { @@ -333,36 +370,63 @@ static xs_list *_xs_json_load_array(FILE *f) int c = 0; for (;;) { - js_type tt; - xs *v = _xs_json_load_lexer(f, &tt); + xs *v = NULL; + int r = xs_json_load_array_iter(f, &v, &c); - if (tt == JS_ERROR) - break; + if (r == -1) + 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); + if (r == 1) + l = xs_list_append(l, v); else - if (tt == JS_OCURLY) - v = _xs_json_load_object(f); - - if (v == NULL) break; - - l = xs_list_append(l, v); - c++; } - 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(); for (;;) { - js_type tt; - xs *k = _xs_json_load_lexer(f, &tt); + xs *k = NULL; xs *v = NULL; + int r = xs_json_load_object_iter(f, &k, &v, &c); - if (tt == JS_ERROR) - break; + if (r == -1) + 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); + if (r == 1) + d = xs_dict_append(d, k, v); else - if (tt == JS_OCURLY) - v = _xs_json_load_object(f); - - if (v == NULL) break; - - d = xs_dict_append(d, k, v); - c++; } - 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) /* loads a JSON file */ { xs_val *v = NULL; - js_type t; + xstype t = xs_json_load_type(f); - xs_free(_xs_json_load_lexer(f, &t)); - - if (t == JS_OBRACK) + if (t == XSTYPE_LIST) v = _xs_json_load_array(f); else - if (t == JS_OCURLY) + if (t == XSTYPE_DICT) v = _xs_json_load_object(f); return v; diff --git a/xs_version.h b/xs_version.h index 9ac34f0..a5c9ee7 100644 --- a/xs_version.h +++ b/xs_version.h @@ -1 +1 @@ -/* ce9e43569a7dd29a85c807e496c335cc4999bafd */ +/* 9a2b91d7713c862ce8753721da2ab5867abb80fd */