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authordec05eba <dec05eba@protonmail.com>2020-01-14 07:54:59 +0100
committerdec05eba <dec05eba@protonmail.com>2020-01-14 07:54:59 +0100
commitf5fc07765303055922e1dfcc35f2f2f620c1e66b (patch)
tree99c82f033e81948f76d9367531d51a0955cb047f /src
parente27bd78c8211532bf0d39d87d2051222f7e86e26 (diff)
add parser...
Diffstat (limited to 'src')
-rw-r--r--src/main.c23
-rw-r--r--src/parser.c39
-rw-r--r--src/tokenizer.c12
3 files changed, 53 insertions, 21 deletions
diff --git a/src/main.c b/src/main.c
index 6653ba2..04932d3 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,9 +1,7 @@
-#include "../include/tokenizer.h"
+#include "../include/parser.h"
#include <string.h>
-#include <stdio.h>
int main() {
- TslTokenizer tokenizer;
const char *code =
"value1 = 1\n"
"value2 = true\n"
@@ -22,20 +20,5 @@ int main() {
"\n"
"str = value9[\"hello\"]\n"
"value9[\"sayHello\"]()";
- tsl_tokenizer_init(&tokenizer, code, strlen(code));
-
- for(;;) {
- TslToken token = tsl_tokenizer_next(&tokenizer);
- if(token == TSL_TOKEN_END_OF_FILE) {
- break;
- } else if(token == TSL_TOKEN_IDENTIFIER) {
- printf("identifier: %.*s\n", (int)tokenizer.identifier.size, tokenizer.identifier.data);
- } else if(token == TSL_TOKEN_NUM) {
- printf("num: %ld\n", tokenizer.number_value);
- } else {
- return 1;
- }
- }
-
- return 0;
-} \ No newline at end of file
+ return tsl_parse(code, strlen(code));
+}
diff --git a/src/parser.c b/src/parser.c
new file mode 100644
index 0000000..35a4abb
--- /dev/null
+++ b/src/parser.c
@@ -0,0 +1,39 @@
+#include "../include/parser.h"
+#include <stdio.h>
+
+typedef struct {
+ TslTokenizer tokenizer;
+} TslParser;
+
+static void tsl_parser_init(TslParser *self, const char *code, size_t code_size) {
+ tsl_tokenizer_init(&self->tokenizer, code, code_size);
+}
+
+static int tsl_parser_parse_rhs(TslParser *self) {
+ return 0;
+}
+
+static int tsl_parser_parse(TslParser *self) {
+ for(;;) {
+ TslToken token = tsl_tokenizer_next(&self->tokenizer);
+ if(token == TSL_TOKEN_IDENTIFIER) {
+ TslStringView identifier = self->tokenizer.identifier;
+ if(!tsl_tokenizer_accept(&self->tokenizer, TSL_TOKEN_EQUAL)) {
+ return -1;
+ }
+ tsl_parser_parse_rhs(self);
+ } else if(token == TSL_TOKEN_END_OF_FILE) {
+ break;
+ } else {
+ fprintf(stderr, "Error: Expected identifier, got TODO\n");
+ return -1;
+ }
+ }
+ return 0;
+}
+
+int tsl_parse(const char *code, size_t code_size) {
+ TslParser parser;
+ tsl_parser_init(&parser, code, code_size);
+ return tsl_parser_parse(&parser);
+}
diff --git a/src/tokenizer.c b/src/tokenizer.c
index 1ab34db..97673f5 100644
--- a/src/tokenizer.c
+++ b/src/tokenizer.c
@@ -76,7 +76,8 @@ const int64_t num_multipliers[] = {
/* TODO: Check if the number if too large to fit into the result */
static int64_t string_to_int(TslStringView *str) {
int64_t num = 0;
- for(size_t i = 0; i < str->size; ++i) {
+ size_t i = 0;
+ for(; i < str->size; ++i) {
char digit = str->data[str->size - 1 - i] - '0';
num += digit * num_multipliers[i];
}
@@ -146,3 +147,12 @@ TslToken tsl_tokenizer_next(TslTokenizer *self) {
return TSL_TOKEN_UNEXPECTED_SYMBOL;
}
}
+
+int tsl_tokenizer_accept(TslTokenizer *self, TslToken expected_token) {
+ TslToken actual_token = tsl_tokenizer_next(self);
+ if(actual_token != expected_token) {
+ fprintf(stderr, "Error: Expected TODO, got TODO\n");
+ return 0;
+ }
+ return 1;
+}