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authorMitya Selivanov <automainint@guattari.tech>2024-07-14 21:12:37 +0200
committerMitya Selivanov <automainint@guattari.tech>2024-07-14 21:12:37 +0200
commit30740ca4131d1f574718262451b4410207dc8d4e (patch)
treefc88b16a216079397ad85b9c6b1a1c1c5712a814 /kit/xml.c
parent5e3c99bb1cf1d03ea006300121265571f5008fd2 (diff)
downloadsaw-30740ca4131d1f574718262451b4410207dc8d4e.zip
Reworking the build system
Diffstat (limited to 'kit/xml.c')
-rw-r--r--kit/xml.c483
1 files changed, 483 insertions, 0 deletions
diff --git a/kit/xml.c b/kit/xml.c
new file mode 100644
index 0000000..f61bfc1
--- /dev/null
+++ b/kit/xml.c
@@ -0,0 +1,483 @@
+#include "xml.h"
+
+#include "input_buffer.h"
+#include <assert.h>
+
+typedef struct {
+ ib_token_t last;
+ str_builder_t text;
+ kit_da_xml_t tags;
+} kit_xml_intermediate_t;
+
+static s32 kit_xml_alloc_and_unescape_(str_builder_t *dst, str_t str,
+ kit_allocator_t *alloc) {
+ assert(dst != NULL);
+ assert(str.size == 0 || str.values != NULL);
+
+ if (dst == NULL)
+ return KIT_ERROR_INTERNAL;
+ if (str.size != 0 && str.values == NULL)
+ return KIT_ERROR_INTERNAL;
+
+ DA_INIT(*dst, str.size, alloc);
+
+ if (dst->size != str.size)
+ return KIT_ERROR_OUT_OF_MEMORY;
+
+ dst->size = 0;
+
+ for (i64 i = 0; i < str.size; i++)
+ if (str.values[i] != '&')
+ dst->values[dst->size++] = str.values[i];
+ else {
+ i64 n = 1;
+ while (i + n < str.size && str.values[i + n] != ';')
+ n++;
+ if (i + n >= str.size) {
+ DA_DESTROY(*dst);
+ return KIT_PARSING_FAILED;
+ }
+ if (n == 3 && memcmp(str.values + i, "&lt;", 4) == 0)
+ dst->values[dst->size++] = '<';
+ else if (n == 3 && memcmp(str.values + i, "&gt;", 4) == 0)
+ dst->values[dst->size++] = '>';
+ else if (n == 4 && memcmp(str.values + i, "&amp;", 5) == 0)
+ dst->values[dst->size++] = '&';
+ else if (n == 5 && memcmp(str.values + i, "&quot;", 6) == 0)
+ dst->values[dst->size++] = '"';
+ else if (n == 5 && memcmp(str.values + i, "&apos;", 6) == 0)
+ dst->values[dst->size++] = '\'';
+ else if (n - 2 <= 8 && str.values[i + 1] == '#' &&
+ str.values[i + 2] == 'x') {
+ // hex encoding
+ //
+
+ c8 buf[8];
+ u64 x = 0;
+
+ memcpy(buf, str.values + (i + 3), n - 2);
+
+ for (i64 k = 0; k < n - 2; k++) {
+ c8 c = str.values[i + 3 + k];
+ x <<= 8;
+ if (c >= '0' && c <= '9')
+ x |= (c - '0');
+ else if (c >= 'a' && c <= 'f')
+ x |= 10 + (c - 'a');
+ else if (c >= 'A' && c <= 'F')
+ x |= 10 + (c - 'A');
+ else {
+ x = 0;
+ break;
+ }
+ }
+
+ if (x == 0 || x > 255u) {
+ // TODO
+ // UTF-8 encoding
+
+ DA_DESTROY(*dst);
+ return KIT_PARSING_FAILED;
+ }
+
+ dst->values[dst->size++] = (c8) x;
+ } else if (n - 1 <= 20 && str.values[i + 1] == '#') {
+ // dec encoding
+ //
+
+ c8 buf[20];
+ u64 x = 0;
+
+ memcpy(buf, str.values + (i + 2), n - 2);
+
+ for (i64 k = 0; k < n - 1; k++) {
+ c8 c = str.values[i + 2 + k];
+ x *= 10;
+ if (c >= '0' && c <= '9')
+ x += (c - '0');
+ else {
+ x = 0;
+ break;
+ }
+ }
+
+ if (x == 0 || x > 255u) {
+ // TODO
+ // UTF-8 encoding
+
+ DA_DESTROY(*dst);
+ return KIT_PARSING_FAILED;
+ }
+
+ dst->values[dst->size++] = (c8) x;
+ } else {
+ DA_DESTROY(*dst);
+ return KIT_PARSING_FAILED;
+ }
+ i += n;
+ }
+
+ return KIT_OK;
+}
+
+static ib_token_t kit_xml_parse_text_(ib_token_t begin,
+ str_builder_t *dst) {
+ ib_token_t last = ib_until(begin, SZ("<"));
+
+ DA_RESIZE(*dst, last.size);
+
+ assert(dst->size == last.size);
+ if (dst->size != last.size)
+ last.status |= KIT_ERROR_OUT_OF_MEMORY;
+ else if (last.size > 0)
+ memcpy(dst->values, ib_str(last).values, last.size);
+
+ for (;;) {
+ ib_token_t comment_open = ib_exact(last, SZ("<!--"));
+
+ if (comment_open.status != KIT_OK)
+ break;
+
+ ib_token_t comment_text = ib_until(comment_open, SZ("-->"));
+ ib_token_t comment_close = ib_exact(comment_text, SZ("-->"));
+ ib_token_t next_text = ib_until(comment_close, SZ("<"));
+
+ if (next_text.status == KIT_OK && next_text.size > 0) {
+ i64 n = dst->size;
+ DA_RESIZE(*dst, n + next_text.size);
+
+ assert(dst->size == n + next_text.size);
+ if (dst->size != n + next_text.size)
+ next_text.status |= KIT_ERROR_OUT_OF_MEMORY;
+ else
+ memcpy(dst->values + n, ib_str(next_text).values,
+ ib_str(next_text).size);
+ }
+
+ last = next_text;
+ }
+
+ return last;
+}
+
+static ib_token_t kit_xml_parse_string_(ib_token_t begin,
+ ib_token_t *value) {
+ assert(value != NULL);
+ if (value == NULL) {
+ begin.status |= KIT_ERROR_INTERNAL;
+ return begin;
+ }
+
+ ib_token_t quotes_open = ib_exact(begin, SZ("\""));
+ ib_token_t apostr_open = ib_exact(begin, SZ("'"));
+
+ ib_token_t open = quotes_open.status == KIT_OK ? quotes_open
+ : apostr_open;
+
+ *value = ib_until(open, ib_str(open));
+ ib_token_t close = ib_exact(*value, ib_str(open));
+
+ return close;
+}
+
+static kit_xml_intermediate_t kit_xml_parse_buf_(
+ ib_token_t begin, kit_allocator_t *alloc) {
+ kit_xml_intermediate_t res;
+ memset(&res, 0, sizeof res);
+
+ ib_token_t last, spaces;
+ memset(&last, 0, sizeof last);
+ memset(&spaces, 0, sizeof spaces);
+
+ str_builder_t tag_text_string;
+ str_builder_t tag_tail_string;
+ DA_INIT(tag_text_string, 0, alloc);
+ DA_INIT(tag_tail_string, 0, alloc);
+
+ ib_token_t tag_text = kit_xml_parse_text_(begin, &tag_text_string);
+ last = tag_text;
+
+ DA_INIT(res.tags, 0, alloc);
+
+ for (;;) {
+ ib_token_t tagend_open = ib_exact(last, SZ("</"));
+ if (tagend_open.status == KIT_OK)
+ break;
+
+ ib_token_t tag_open = ib_exact(last, SZ("<"));
+
+ if (tag_open.status != KIT_OK)
+ break;
+
+ xml_t tag;
+ memset(&tag, 0, sizeof tag);
+
+ ib_token_t decl_open = ib_exact(tag_open, SZ("?"));
+
+ if (decl_open.status == KIT_OK) {
+ tag.is_declaration = 1;
+ last = decl_open;
+ } else
+ last = tag_open;
+
+ spaces = ib_any(last, SZ(" \t\r\n"));
+ ib_token_t tag_name = ib_none(spaces, SZ(" \t\r\n/>"));
+
+ DA_INIT(tag.properties, 0, alloc);
+
+ last = tag_name;
+
+ for (;;) {
+ spaces = ib_any(last, SZ(" \t\r\n"));
+ ib_token_t property = ib_none(spaces, SZ(" \t\r\n=?/>"));
+
+ if (property.status != KIT_OK || property.size == 0)
+ break;
+
+ spaces = ib_any(property, SZ(" \t\r\n"));
+ ib_token_t equals = ib_exact(spaces, SZ("="));
+ spaces = ib_any(equals, SZ(" \t\r\n"));
+
+ ib_token_t value;
+ last = kit_xml_parse_string_(spaces, &value);
+
+ if (last.status == KIT_OK) {
+ i64 n = tag.properties.size;
+ DA_RESIZE(tag.properties, n + 1);
+
+ assert(tag.properties.size == n + 1);
+ if (tag.properties.size != n + 1) {
+ last.status |= KIT_ERROR_OUT_OF_MEMORY;
+ DA_DESTROY(tag.properties);
+ } else {
+ last.status |= kit_xml_alloc_and_unescape_(
+ &tag.properties.values[n].name, ib_str(property),
+ alloc);
+ last.status |= kit_xml_alloc_and_unescape_(
+ &tag.properties.values[n].value, ib_str(value), alloc);
+ }
+ }
+ }
+
+ if (tag.is_declaration) {
+ ib_token_t tag_decl_close = ib_exact(spaces, SZ("?>"));
+
+ last = tag_decl_close;
+
+ DA_INIT(tag.text, 0, alloc);
+ DA_INIT(tag.children, 0, alloc);
+ } else {
+ ib_token_t tag_close = ib_exact(spaces, SZ(">"));
+ ib_token_t tag_close_empty = ib_exact(spaces, SZ("/>"));
+
+ if (tag_close.status == KIT_OK) {
+ kit_xml_intermediate_t im = kit_xml_parse_buf_(tag_close,
+ alloc);
+
+ tag.text = im.text;
+ tag.children = im.tags;
+
+ tagend_open = ib_exact(im.last, SZ("</"));
+ spaces = ib_any(tagend_open, SZ(" \t\r\n"));
+ ib_token_t tagend_name = ib_exact(spaces, ib_str(tag_name));
+ spaces = ib_any(tagend_name, SZ(" \t\r\n"));
+ ib_token_t tagend_close = ib_exact(spaces, SZ(">"));
+
+ last = tagend_close;
+
+ } else if (tag_close_empty.status == KIT_OK) {
+ last = tag_close_empty;
+
+ DA_INIT(tag.text, 0, alloc);
+ DA_INIT(tag.children, 0, alloc);
+ } else
+ last.status |= KIT_PARSING_FAILED;
+ }
+
+ ib_token_t tag_tail = kit_xml_parse_text_(last, &tag_tail_string);
+
+ last = tag_tail;
+
+ if (last.status == KIT_OK) {
+ i64 n = res.tags.size;
+ DA_RESIZE(res.tags, n + 1);
+
+ assert(res.tags.size == n + 1);
+ if (res.tags.size != n + 1) {
+ last.status |= KIT_ERROR_OUT_OF_MEMORY;
+ xml_destroy(&tag);
+ } else {
+ last.status |= kit_xml_alloc_and_unescape_(
+ &tag.tag, ib_str(tag_name), alloc);
+ last.status |= kit_xml_alloc_and_unescape_(
+ &tag.tail, WRAP_STR(tag_tail_string), alloc);
+
+ res.tags.values[n] = tag;
+ }
+ } else
+ xml_destroy(&tag);
+ }
+
+ if (last.status != KIT_OK) {
+ for (i64 i = 0; i < res.tags.size; i++)
+ xml_destroy(res.tags.values + i);
+ DA_DESTROY(res.text);
+ DA_DESTROY(res.tags);
+ } else
+ last.status |= kit_xml_alloc_and_unescape_(
+ &res.text, WRAP_STR(tag_text_string), alloc);
+
+ DA_DESTROY(tag_text_string);
+ DA_DESTROY(tag_tail_string);
+
+ res.last = last;
+ return res;
+}
+
+kit_xml_parse_result_t kit_xml_parse(is_handle_t is,
+ kit_allocator_t *alloc) {
+ input_buffer_t ib = ib_init(is, alloc);
+ kit_xml_intermediate_t im = kit_xml_parse_buf_(ib_token(&ib),
+ alloc);
+
+ kit_xml_parse_result_t res;
+ memset(&res, 0, sizeof res);
+
+ res.status = im.last.status;
+
+ if (res.status != KIT_OK) {
+ ib_destroy(&ib);
+ return res;
+ }
+
+ if (im.text.size == 0 && im.tags.size == 1) {
+ res.xml = im.tags.values[0];
+ DA_DESTROY(im.text);
+ DA_DESTROY(im.tags);
+ ib_destroy(&ib);
+ return res;
+ }
+
+ DA_INIT(res.xml.tag, 0, alloc);
+ DA_INIT(res.xml.tail, 0, alloc);
+ DA_INIT(res.xml.properties, 0, alloc);
+
+ res.xml.text = im.text;
+ res.xml.children = im.tags;
+
+ ib_destroy(&ib);
+ return res;
+}
+
+kit_xml_text_t kit_xml_print(kit_xml_t *xml, kit_allocator_t *alloc) {
+ // TODO
+ //
+
+ assert(xml != NULL);
+
+ xml_text_t result;
+ memset(&result, 0, sizeof result);
+
+ (void) alloc;
+
+ result.status = KIT_ERROR_NOT_IMPLEMENTED;
+ return result;
+}
+
+static s32 kit_xml_append_text_(str_builder_t *buf, xml_t *xml) {
+ assert(buf != NULL);
+ assert(xml != NULL);
+
+ i64 n = buf->size;
+ DA_RESIZE(*buf, n + xml->text.size);
+
+ assert(buf->size == n + xml->text.size);
+ if (buf->size != n + xml->text.size)
+ return KIT_ERROR_OUT_OF_MEMORY;
+
+ if (xml->text.size > 0)
+ memcpy(buf->values + n, xml->text.values, xml->text.size);
+
+ for (i64 i = 0; i < xml->children.size; i++) {
+ s32 s = kit_xml_append_text_(buf, xml->children.values + i);
+ if (s != KIT_OK)
+ return s;
+
+ str_t tail = WRAP_STR(xml->children.values[i].tail);
+
+ if (tail.size <= 0)
+ continue;
+
+ n = buf->size;
+ DA_RESIZE(*buf, n + tail.size);
+
+ assert(buf->size == n + tail.size);
+ if (buf->size != n + tail.size)
+ return KIT_ERROR_OUT_OF_MEMORY;
+
+ if (tail.size > 0)
+ memcpy(buf->values + n, tail.values, tail.size);
+ }
+
+ return KIT_OK;
+}
+
+kit_xml_text_t kit_xml_full_text(kit_xml_t *xml,
+ kit_allocator_t *alloc) {
+ kit_xml_text_t res;
+ res.status = KIT_OK;
+ DA_INIT(res.text, 0, alloc);
+
+ if (xml != NULL)
+ res.status = kit_xml_append_text_(&res.text, xml);
+ else
+ res.status = KIT_ERROR_INVALID_ARGUMENT;
+
+ return res;
+}
+
+b8 kit_xml_has_property(kit_xml_t *xml, kit_str_t name) {
+ assert(xml != NULL);
+ if (xml == NULL)
+ return 0;
+
+ for (i64 i = 0; i < xml->properties.size; i++)
+ if (AR_EQUAL(xml->properties.values[i].name, name))
+ return 1;
+
+ return 0;
+}
+
+str_t kit_xml_property(kit_xml_t *xml, str_t name) {
+ assert(xml != NULL);
+ if (xml == NULL)
+ return str(0, NULL);
+
+ for (i64 i = 0; i < xml->properties.size; i++)
+ if (AR_EQUAL(xml->properties.values[i].name, name))
+ return WRAP_STR(xml->properties.values[i].value);
+
+ assert(0);
+ return str(0, NULL);
+}
+
+void kit_xml_destroy(kit_xml_t *xml) {
+ assert(xml != NULL);
+ if (xml == NULL)
+ return;
+
+ for (i64 i = 0; i < xml->properties.size; i++) {
+ DA_DESTROY(xml->properties.values[i].name);
+ DA_DESTROY(xml->properties.values[i].value);
+ }
+
+ for (i64 i = 0; i < xml->children.size; i++)
+ kit_xml_destroy(xml->children.values + i);
+
+ DA_DESTROY(xml->tag);
+ DA_DESTROY(xml->text);
+ DA_DESTROY(xml->tail);
+
+ DA_DESTROY(xml->properties);
+ DA_DESTROY(xml->children);
+}