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Handle escape sequence

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Night Kaly 2024-10-24 10:58:20 +01:00
parent 0f722e126b
commit 9f39fd2c85
Signed by: night0721
SSH key fingerprint: SHA256:B/hgVwUoBpx5vdNsXl9w8XwZljA9766uk6T4ubZp5HM
1 changed files with 86 additions and 25 deletions
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107
nsh.c
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@ -14,13 +14,16 @@
#define COLOR_SKY "\033[38;2;137;220;235m"
#define COLOR_RED "\033[38;2;243;139;168m"
#define COLOR_PEACH "\033[38;2;250;179;135m"
#define COLOR_PINK "\033[38;2;245;194;231m"
const char *keywords[] = {
"if", "else", "while", "for", "return", "switch", "case", "default", "break", "continue", "const", "#define", "#include", NULL
"if", "else", "while", "for", "return", "switch", "case", "default",
"break", "continue", "const", "#define", "#include", NULL
};
const char *types[] = {
"void", "int", "char", "float", "double", "long", "short", "unsigned", "signed", "struct", "enum", "union", NULL
"void", "int", "char", "float", "double", "long", "short", "unsigned",
"signed", "struct", "enum", "union", NULL
};
/* Function declarations for different token handling */
@ -137,35 +140,73 @@ void highlight_char(const char *line, int *i)
printf(COLOR_TEAL "'");
(*i)++;
while (line[*i] != '\'' && line[*i] != '\0') {
if (line[*i] == '\\' && (line[*i + 1] == '\'' || line[*i + 1] == '\\')) {
printf("%c%c", line[*i], line[*i + 1]); // Handle escape sequences
/* Handle escape sequence */
if (line[*i] == '\\' && line[*i+1] > 32 && line[*i+1] < 127) {
printf(COLOR_PINK "%c%c" COLOR_RESET, line[*i], line[*i + 1]);
/* Check if escape sequence is octal */
int cur_idx = (*i) + 2;
while (line[cur_idx] > 47 && line[cur_idx] < 58) {
printf(COLOR_PINK "%c" COLOR_RESET, line[cur_idx]);
cur_idx++;
}
if (cur_idx == *i + 2) {
/* Not octal escape code */
(*i) += 2;
} else {
printf("%c", line[*i]);
(*i) += cur_idx - *i;
}
} else {
printf(COLOR_TEAL "%c", line[*i]);
(*i)++;
}
}
if (line[*i] == '\'') {
printf("'" COLOR_RESET); // Print closing single quote and reset color
printf("'" COLOR_RESET);
}
}
/* Function to handle and highlight string literals */
void highlight_string(const char *line, int *i)
{
printf(COLOR_GREEN "\""); // Print opening quote in green
printf(COLOR_GREEN "\"");
(*i)++;
while (line[*i] != '"' && line[*i] != '\0') {
if (line[*i] == '\\' && (line[*i + 1] == '"' || line[*i + 1] == '\\')) {
printf("%c%c", line[*i], line[*i + 1]); // Print the escape character and the next character
(*i) += 2; // Move past the escape character and the next character
/* Handle escape sequence */
if (line[*i] == '\\' && line[*i+1] > 32 && line[*i+1] < 127) {
printf(COLOR_PINK "%c%c" COLOR_RESET, line[*i], line[*i + 1]);
/* Check if escape sequence is octal */
int cur_idx = (*i) + 2;
while (line[cur_idx] > 47 && line[cur_idx] < 58) {
printf(COLOR_PINK "%c" COLOR_RESET, line[cur_idx]);
cur_idx++;
}
if (cur_idx == *i + 2) {
/* Not octal escape code */
(*i) += 2;
} else {
printf("%c", line[*i]);
(*i) += cur_idx - *i;
}
} else {
printf(COLOR_GREEN "%c", line[*i]);
(*i)++;
}
}
if (line[*i] == '"') {
printf("\"" COLOR_RESET); // Print the closing quote and reset color
printf("\"" COLOR_RESET);
}
}
/* Function to handle and highlight include strings */
void highlight_include(const char *line, int *i)
{
printf(COLOR_GREEN "<");
(*i)++;
while (line[*i] != '>' && line[*i] != '\0') {
printf(COLOR_GREEN "%c", line[*i]);
(*i)++;
}
if (line[*i] == '>') {
printf(">" COLOR_RESET);
}
}
@ -182,11 +223,11 @@ int main(int argc, char **argv)
fprintf(stderr, "Unable to open file: %s\n", argv[i]);
exit(1);
}
/* handle file without extension
/* Handle file without extension
* ext is the extension if . exist in filename, otherwise nothing */
char *ext = strrchr(argv[i], '.');
if (ext != NULL) {
/* how to identify file type if there isn't extension? */
/* How to identify file type if there isn't extension? */
ext++;
}
char buffer[1024];
@ -204,6 +245,14 @@ int main(int argc, char **argv)
highlight_string(buffer, &i);
continue;
}
if (buffer[i] == '<') {
if (buffer[i-1] != NULL && buffer[i-1] == 'e' ||
(buffer[i-1] != NULL && buffer[i-1] == ' ' &&
buffer[i-2] != NULL && buffer[i-2] == 'e')) {
highlight_include(buffer, &i);
continue;
}
}
if (buffer[i] == '/' && buffer[i+1] == '/') {
highlight_single_comment(buffer, &i);
break;
@ -211,30 +260,42 @@ int main(int argc, char **argv)
if (buffer[i] == '/' && buffer[i+1] == '*') {
highlight_multi_comment(buffer, &i);
}
if (isspace(buffer[i]) || (ispunct(buffer[i]) && buffer[i] != '_' && buffer[i] != '#')) {
if (word_len > 0 && buffer[i] != '*' && buffer[i] != '&' && buffer[i] != '=' && buffer[i] != '+' && buffer[i] != '|') {
if (isspace(buffer[i]) || (ispunct(buffer[i]) &&
buffer[i] != '_' && buffer[i] != '#')) {
if (word_len > 0 && buffer[i] != '*' &&
buffer[i] != '&' && buffer[i] != '=' &&
buffer[i] != '+' && buffer[i] != '|') {
word[word_len] = '\0';
if (buffer[i] == '(' && !is_keyword(word) && !is_type(word)) {
highlight_function(word); // Highlight function if it’s not a keyword or type
if (buffer[i] == '(' && !is_keyword(word) &&
!is_type(word)) {
highlight_function(word);
} else if (is_type(word)) {
highlight_type(word); // Highlight types correctly
highlight_type(word);
} else if (is_keyword(word)) {
highlight_keyword(word); // Highlight keywords or other words
highlight_keyword(word);
} else {
highlight_normal(word);
}
word_len = 0;
}
if (buffer[i] == '[' || buffer[i] == ']' || buffer[i] == '(' || buffer[i] == ')' || buffer[i] == '{' || buffer[i] == '}') {
if (buffer[i] == '[' || buffer[i] == ']' ||
buffer[i] == '(' || buffer[i] == ')' ||
buffer[i] == '{' || buffer[i] == '}') {
word[word_len++] = buffer[i];
word[word_len] = '\0';
highlight_brackets(word);
word_len = 0;
continue;
}
if (buffer[i] == '*' || buffer[i] == '&' || buffer[i] == '=' || buffer[i] == '+' || buffer[i] == '|') {
if (buffer[i] == '*' || buffer[i] == '&' ||
buffer[i] == '=' || buffer[i] == '+' ||
buffer[i] == '|' || buffer[i] == '!' ||
buffer[i] == '<' || buffer[i] == '>') {
word[word_len++] = buffer[i];
if (buffer[i+1] != '*' && buffer[i+1] != '&' && buffer[i+1] != '=' && buffer[i+1] != '+' && buffer[i+1] != '|') {
if (buffer[i+1] != '*' && buffer[i+1] != '&' &&
buffer[i+1] != '=' && buffer[i+1] != '+' &&
buffer[i+1] != '|' && buffer[i] != '!'&&
buffer[i] != '<' && buffer[i] != '>') {
word[word_len] = '\0';
highlight_symbol(word);
word_len = 0;