Handle escape sequence
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parent
0f722e126b
commit
9f39fd2c85
SSH key fingerprint:
SHA256:B/hgVwUoBpx5vdNsXl9w8XwZljA9766uk6T4ubZp5HM
1 changed files with 86 additions and 25 deletions
111
nsh.c
111
nsh.c
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@ -13,14 +13,17 @@
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#define COLOR_YELLOW "\033[38;2;249;226;175m"
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#define COLOR_SKY "\033[38;2;137;220;235m"
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#define COLOR_RED "\033[38;2;243;139;168m"
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#define COLOR_PEACH "\033[38;2;250;179;135m"
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#define COLOR_PEACH "\033[38;2;250;179;135m"
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#define COLOR_PINK "\033[38;2;245;194;231m"
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const char *keywords[] = {
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"if", "else", "while", "for", "return", "switch", "case", "default", "break", "continue", "const", "#define", "#include", NULL
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"if", "else", "while", "for", "return", "switch", "case", "default",
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"break", "continue", "const", "#define", "#include", NULL
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};
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const char *types[] = {
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"void", "int", "char", "float", "double", "long", "short", "unsigned", "signed", "struct", "enum", "union", NULL
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"void", "int", "char", "float", "double", "long", "short", "unsigned",
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"signed", "struct", "enum", "union", NULL
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};
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/* Function declarations for different token handling */
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@ -137,35 +140,73 @@ void highlight_char(const char *line, int *i)
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printf(COLOR_TEAL "'");
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(*i)++;
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while (line[*i] != '\'' && line[*i] != '\0') {
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if (line[*i] == '\\' && (line[*i + 1] == '\'' || line[*i + 1] == '\\')) {
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printf("%c%c", line[*i], line[*i + 1]); // Handle escape sequences
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(*i) += 2;
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/* Handle escape sequence */
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if (line[*i] == '\\' && line[*i+1] > 32 && line[*i+1] < 127) {
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printf(COLOR_PINK "%c%c" COLOR_RESET, line[*i], line[*i + 1]);
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/* Check if escape sequence is octal */
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int cur_idx = (*i) + 2;
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while (line[cur_idx] > 47 && line[cur_idx] < 58) {
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printf(COLOR_PINK "%c" COLOR_RESET, line[cur_idx]);
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cur_idx++;
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}
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if (cur_idx == *i + 2) {
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/* Not octal escape code */
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(*i) += 2;
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} else {
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(*i) += cur_idx - *i;
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}
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} else {
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printf("%c", line[*i]);
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printf(COLOR_TEAL "%c", line[*i]);
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(*i)++;
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}
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}
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if (line[*i] == '\'') {
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printf("'" COLOR_RESET); // Print closing single quote and reset color
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printf("'" COLOR_RESET);
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}
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}
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/* Function to handle and highlight string literals */
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void highlight_string(const char *line, int *i)
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{
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printf(COLOR_GREEN "\""); // Print opening quote in green
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printf(COLOR_GREEN "\"");
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(*i)++;
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while (line[*i] != '"' && line[*i] != '\0') {
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if (line[*i] == '\\' && (line[*i + 1] == '"' || line[*i + 1] == '\\')) {
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printf("%c%c", line[*i], line[*i + 1]); // Print the escape character and the next character
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(*i) += 2; // Move past the escape character and the next character
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/* Handle escape sequence */
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if (line[*i] == '\\' && line[*i+1] > 32 && line[*i+1] < 127) {
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printf(COLOR_PINK "%c%c" COLOR_RESET, line[*i], line[*i + 1]);
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/* Check if escape sequence is octal */
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int cur_idx = (*i) + 2;
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while (line[cur_idx] > 47 && line[cur_idx] < 58) {
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printf(COLOR_PINK "%c" COLOR_RESET, line[cur_idx]);
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cur_idx++;
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}
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if (cur_idx == *i + 2) {
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/* Not octal escape code */
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(*i) += 2;
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} else {
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(*i) += cur_idx - *i;
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}
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} else {
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printf("%c", line[*i]);
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printf(COLOR_GREEN "%c", line[*i]);
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(*i)++;
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}
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}
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if (line[*i] == '"') {
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printf("\"" COLOR_RESET); // Print the closing quote and reset color
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printf("\"" COLOR_RESET);
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}
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}
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/* Function to handle and highlight include strings */
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void highlight_include(const char *line, int *i)
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{
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printf(COLOR_GREEN "<");
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(*i)++;
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while (line[*i] != '>' && line[*i] != '\0') {
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printf(COLOR_GREEN "%c", line[*i]);
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(*i)++;
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}
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if (line[*i] == '>') {
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printf(">" COLOR_RESET);
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}
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}
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@ -182,11 +223,11 @@ int main(int argc, char **argv)
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fprintf(stderr, "Unable to open file: %s\n", argv[i]);
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exit(1);
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}
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/* handle file without extension
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/* Handle file without extension
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* ext is the extension if . exist in filename, otherwise nothing */
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char *ext = strrchr(argv[i], '.');
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if (ext != NULL) {
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/* how to identify file type if there isn't extension? */
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/* How to identify file type if there isn't extension? */
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ext++;
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}
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char buffer[1024];
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@ -204,6 +245,14 @@ int main(int argc, char **argv)
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highlight_string(buffer, &i);
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continue;
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}
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if (buffer[i] == '<') {
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if (buffer[i-1] != NULL && buffer[i-1] == 'e' ||
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(buffer[i-1] != NULL && buffer[i-1] == ' ' &&
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buffer[i-2] != NULL && buffer[i-2] == 'e')) {
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highlight_include(buffer, &i);
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continue;
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}
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}
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if (buffer[i] == '/' && buffer[i+1] == '/') {
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highlight_single_comment(buffer, &i);
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break;
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@ -211,30 +260,42 @@ int main(int argc, char **argv)
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if (buffer[i] == '/' && buffer[i+1] == '*') {
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highlight_multi_comment(buffer, &i);
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}
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if (isspace(buffer[i]) || (ispunct(buffer[i]) && buffer[i] != '_' && buffer[i] != '#')) {
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if (word_len > 0 && buffer[i] != '*' && buffer[i] != '&' && buffer[i] != '=' && buffer[i] != '+' && buffer[i] != '|') {
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if (isspace(buffer[i]) || (ispunct(buffer[i]) &&
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buffer[i] != '_' && buffer[i] != '#')) {
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if (word_len > 0 && buffer[i] != '*' &&
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buffer[i] != '&' && buffer[i] != '=' &&
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buffer[i] != '+' && buffer[i] != '|') {
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word[word_len] = '\0';
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if (buffer[i] == '(' && !is_keyword(word) && !is_type(word)) {
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highlight_function(word); // Highlight function if it’s not a keyword or type
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if (buffer[i] == '(' && !is_keyword(word) &&
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!is_type(word)) {
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highlight_function(word);
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} else if (is_type(word)) {
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highlight_type(word); // Highlight types correctly
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highlight_type(word);
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} else if (is_keyword(word)) {
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highlight_keyword(word); // Highlight keywords or other words
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highlight_keyword(word);
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} else {
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highlight_normal(word);
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}
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word_len = 0;
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}
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if (buffer[i] == '[' || buffer[i] == ']' || buffer[i] == '(' || buffer[i] == ')' || buffer[i] == '{' || buffer[i] == '}') {
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if (buffer[i] == '[' || buffer[i] == ']' ||
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buffer[i] == '(' || buffer[i] == ')' ||
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buffer[i] == '{' || buffer[i] == '}') {
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word[word_len++] = buffer[i];
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word[word_len] = '\0';
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highlight_brackets(word);
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word_len = 0;
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continue;
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}
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if (buffer[i] == '*' || buffer[i] == '&' || buffer[i] == '=' || buffer[i] == '+' || buffer[i] == '|') {
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if (buffer[i] == '*' || buffer[i] == '&' ||
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buffer[i] == '=' || buffer[i] == '+' ||
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buffer[i] == '|' || buffer[i] == '!' ||
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buffer[i] == '<' || buffer[i] == '>') {
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word[word_len++] = buffer[i];
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if (buffer[i+1] != '*' && buffer[i+1] != '&' && buffer[i+1] != '=' && buffer[i+1] != '+' && buffer[i+1] != '|') {
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if (buffer[i+1] != '*' && buffer[i+1] != '&' &&
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buffer[i+1] != '=' && buffer[i+1] != '+' &&
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buffer[i+1] != '|' && buffer[i] != '!'&&
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buffer[i] != '<' && buffer[i] != '>') {
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word[word_len] = '\0';
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highlight_symbol(word);
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word_len = 0;
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