210 lines
4.1 KiB
C
210 lines
4.1 KiB
C
#include "lexer.h"
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#define HTML_BALISE_LEN 12
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typedef struct Cursor {
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int chunk;
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int offset;
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} Cursor;
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Cursor cursor = {
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.chunk = 0,
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.offset = -1,
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};
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Cursor prev = {
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.chunk = 0,
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.offset = -2,
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};
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void increment_cursor(Cursor* cur){
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if (cur->offset+1 < 0){
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printf("init prev cursor.\n");
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cur->offset++;
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return;
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}
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if (page.chunks[cur->chunk][cur->offset+1] == '\0'){
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cur->chunk++;
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cur->offset = 0;
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} else {
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cur->offset++;
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}
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}
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char* nextchar(void){
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increment_cursor(&cursor);
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increment_cursor(&prev);
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if (cursor.chunk >= page.len){
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return NULL;
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}
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return &page.chunks[cursor.chunk][cursor.offset];
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}
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void go_back(void){
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cursor.chunk = prev.chunk;
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cursor.offset = prev.offset;
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prev.offset--;
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printf("got back mf.\n");
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if (cursor.chunk < 0 || cursor.offset < 0){
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printf("chunk = %d | offset= %d\n", cursor.chunk, cursor.offset);
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puts("ERROR: go way too back.");
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exit(1);
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}
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}
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TokenType token_by_name(const char name[HTML_BALISE_LEN]){
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if (name == NULL){
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return UNDEFINED_TYPE;
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} else if (strncmp(name, "body", HTML_BALISE_LEN) == 0){
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return BODY;
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} else if (strncmp(name, "/body", HTML_BALISE_LEN) == 0){
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return END_BODY;
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} else if (strncmp(name, "ul", HTML_BALISE_LEN) == 0){
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return UL;
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} else if (strncmp(name, "li", HTML_BALISE_LEN) == 0){
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return LI;
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} else if (strncmp(name, "h1", HTML_BALISE_LEN) == 0){
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return H1;
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} else if (strncmp(name, "h2", HTML_BALISE_LEN) == 0){
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return H2;
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} else if (strncmp(name, "h3", HTML_BALISE_LEN) == 0){
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return H3;
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} else if (strncmp(name, "h4", HTML_BALISE_LEN) == 0){
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return H4;
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} else if (strncmp(name, "h5", HTML_BALISE_LEN) == 0){
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return H5;
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} else if (strncmp(name, "h6", HTML_BALISE_LEN) == 0){
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return H6;
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}
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return DONT_CARE;
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}
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Token* nexttoken(void){
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Token* token = NULL;
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static char* cursor = NULL;
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cursor = nextchar();
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while (*cursor == '\n'){
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printf("new line skipped.\n");
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cursor = nextchar();
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}
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if (*cursor != '<'){
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int i = 0;
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do {
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cursor = nextchar();
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i++;
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printf("text: '%c'.\n", *cursor);
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} while (*cursor != '<');
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go_back();
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token = malloc(sizeof(Token));
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token->type = TEXT;
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token->value = "TODO";
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token->len = i;
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} else if (*cursor == '<'){
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char balise[HTML_BALISE_LEN] = {0};
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int len = 0;
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cursor = nextchar();
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while (*cursor != '>' && *cursor != ' ' && len < HTML_BALISE_LEN){
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balise[len] = *cursor;
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len++;
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printf("balise: '%c'.\n", *cursor);
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cursor = nextchar();
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}
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token = malloc(sizeof(Token));
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token->type = token_by_name(balise);
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token->value = malloc(sizeof(char) * len);
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strncpy(token->value, balise, len+1);
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token->len = len;
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do {
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cursor = nextchar();
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printf("skip: '%c'.\n", *cursor);
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} while (*cursor != '>');
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}
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return token;
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}
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void printtoken(Token* token){
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if (token == NULL){
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puts("NULL TOKEN");
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return;
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}
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switch (token->type) {
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case UNDEFINED_TYPE:
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printf("UNDEFINED_TYPE: ");
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break;
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case DONT_CARE:
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printf("DONT_CARE: ");
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break;
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case TEXT:
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printf("TEXT: ");
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break;
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case BODY:
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printf("BODY: ");
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break;
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case END_BODY:
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printf("END_BODY: ");
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break;
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case UL:
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printf("UL: ");
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break;
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case LI:
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printf("LI: ");
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break;
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case H1:
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printf("H1: ");
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break;
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case H2:
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printf("H2: ");
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break;
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case H3:
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printf("H3: ");
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break;
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case H4:
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printf("H4: ");
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break;
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case H5:
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printf("H5: ");
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break;
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case H6:
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printf("H6: ");
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break;
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default:
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printf("ERROR: UNKNOWN TOKEN: ");
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break;
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}
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if (token->value == NULL){
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puts("'NO VALUE FOUND'");
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return;
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}
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printf("'%s'\n", token->value);
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}
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#if 0
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>https://n3m0.fr/fr/</title>
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<link rel="canonical" href="https://n3m0.fr/fr/">
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<meta name="robots" content="noindex">
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<meta charset="utf-8">
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<meta http-equiv="refresh" content="0; url=https://n3m0.fr/fr/">
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</head>
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</html>
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#endif
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