night0721/nsh
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base: night0721:0f722e126bb133019a5980d5b47dd18684302b90
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compare: night0721:abee9ec8fdf86bb5c81231ebd6faec411d43ae47
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night0721:master

4 commits
0f722e126b ... abee9ec8fd

Author SHA1 Message Date
night0721
abee9ec8fd
Resolve compiler warning 2024-11-04 23:20:21 +00:00
night0721
506ec0cb6d
Fix highlight color 2024-10-24 11:28:24 +01:00
night0721
37cbae591c
Remove multiline comment 2024-10-24 11:00:03 +01:00
night0721
9f39fd2c85
Handle escape sequence 2024-10-24 10:58:20 +01:00
1 changed files with 87 additions and 30 deletions
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109
nsh.c
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@ -14,13 +14,16 @@
#define COLOR_SKY "\033[38;2;137;220;235m" #define COLOR_SKY "\033[38;2;137;220;235m"
#define COLOR_RED "\033[38;2;243;139;168m" #define COLOR_RED "\033[38;2;243;139;168m"
#define COLOR_PEACH "\033[38;2;250;179;135m" #define COLOR_PEACH "\033[38;2;250;179;135m"
#define COLOR_PINK "\033[38;2;245;194;231m"
const char *keywords[] = { 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[] = { 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 */ /* Function declarations for different token handling */
@ -137,35 +140,73 @@ void highlight_char(const char *line, int *i)
printf(COLOR_TEAL "'"); printf(COLOR_TEAL "'");
(*i)++; (*i)++;
while (line[*i] != '\'' && line[*i] != '\0') { while (line[*i] != '\'' && line[*i] != '\0') {
if (line[*i] == '\\' && (line[*i + 1] == '\'' || line[*i + 1] == '\\')) { /* Handle escape sequence */
printf("%c%c", line[*i], line[*i + 1]); // Handle escape sequences 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; (*i) += 2;
} else { } else {
printf("%c", line[*i]); (*i) += cur_idx - *i;
}
} else {
printf(COLOR_TEAL "%c", line[*i]);
(*i)++; (*i)++;
} }
} }
if (line[*i] == '\'') { if (line[*i] == '\'') {
printf("'" COLOR_RESET); // Print closing single quote and reset color printf("'" COLOR_RESET);
} }
} }
/* Function to handle and highlight string literals */ /* Function to handle and highlight string literals */
void highlight_string(const char *line, int *i) void highlight_string(const char *line, int *i)
{ {
printf(COLOR_GREEN "\""); // Print opening quote in green printf(COLOR_GREEN "\"");
(*i)++; (*i)++;
while (line[*i] != '"' && line[*i] != '\0') { while (line[*i] != '"' && line[*i] != '\0') {
if (line[*i] == '\\' && (line[*i + 1] == '"' || line[*i + 1] == '\\')) { /* Handle escape sequence */
printf("%c%c", line[*i], line[*i + 1]); // Print the escape character and the next character if (line[*i] == '\\' && line[*i+1] > 32 && line[*i+1] < 127) {
(*i) += 2; // Move past the escape character and the next character 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 { } else {
printf("%c", line[*i]); (*i) += cur_idx - *i;
}
} else {
printf(COLOR_GREEN "%c", line[*i]);
(*i)++; (*i)++;
} }
} }
if (line[*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 +223,10 @@ int main(int argc, char **argv)
fprintf(stderr, "Unable to open file: %s\n", argv[i]); fprintf(stderr, "Unable to open file: %s\n", argv[i]);
exit(1); 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], '.'); char *ext = strrchr(argv[i], '.');
if (ext != NULL) { if (ext != NULL) {
/* how to identify file type if there isn't extension? */ /* How to identify file type if there isn't extension? */
ext++; ext++;
} }
char buffer[1024]; char buffer[1024];
@ -196,6 +236,10 @@ int main(int argc, char **argv)
while (fgets(buffer, sizeof(buffer), f) != NULL) { while (fgets(buffer, sizeof(buffer), f) != NULL) {
if (ext && strcmp(ext, "c") == 0) { if (ext && strcmp(ext, "c") == 0) {
for (int i = 0; buffer[i] != '\0'; i++) { for (int i = 0; buffer[i] != '\0'; i++) {
if (buffer[i] == '\t') {
printf(" ");
continue;
}
if (buffer[i] == '\'') { if (buffer[i] == '\'') {
highlight_char(buffer, &i); highlight_char(buffer, &i);
continue; continue;
@ -204,6 +248,14 @@ int main(int argc, char **argv)
highlight_string(buffer, &i); highlight_string(buffer, &i);
continue; continue;
} }
if (buffer[i] == '<') {
if ((buffer[i-1] != '\0' && buffer[i-1] == 'e') ||
(buffer[i-1] != '\0' && buffer[i-1] == ' ' &&
buffer[i-2] != '\0' && buffer[i-2] == 'e')) {
highlight_include(buffer, &i);
continue;
}
}
if (buffer[i] == '/' && buffer[i+1] == '/') { if (buffer[i] == '/' && buffer[i+1] == '/') {
highlight_single_comment(buffer, &i); highlight_single_comment(buffer, &i);
break; break;
@ -211,34 +263,39 @@ int main(int argc, char **argv)
if (buffer[i] == '/' && buffer[i+1] == '*') { if (buffer[i] == '/' && buffer[i+1] == '*') {
highlight_multi_comment(buffer, &i); highlight_multi_comment(buffer, &i);
} }
if (isspace(buffer[i]) || (ispunct(buffer[i]) && buffer[i] != '_' && buffer[i] != '#')) { if (isspace(buffer[i]) || (ispunct(buffer[i]) &&
if (word_len > 0 && buffer[i] != '*' && buffer[i] != '&' && buffer[i] != '=' && buffer[i] != '+' && buffer[i] != '|') { buffer[i] != '_' && buffer[i] != '#')) {
if (word_len > 0) {
word[word_len] = '\0'; word[word_len] = '\0';
if (buffer[i] == '(' && !is_keyword(word) && !is_type(word)) { if (buffer[i] == '(' && !is_keyword(word) &&
highlight_function(word); // Highlight function if it’s not a keyword or type !is_type(word)) {
highlight_function(word);
} else if (is_type(word)) { } else if (is_type(word)) {
highlight_type(word); // Highlight types correctly highlight_type(word);
} else if (is_keyword(word)) { } else if (is_keyword(word)) {
highlight_keyword(word); // Highlight keywords or other words highlight_keyword(word);
} else { } else {
highlight_normal(word); highlight_normal(word);
} }
word_len = 0; 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++] = buffer[i];
word[word_len] = '\0'; word[word_len] = '\0';
highlight_brackets(word); highlight_brackets(word);
word_len = 0; word_len = 0;
continue; 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]; word[word_len++] = buffer[i];
if (buffer[i+1] != '*' && buffer[i+1] != '&' && buffer[i+1] != '=' && buffer[i+1] != '+' && buffer[i+1] != '|') {
word[word_len] = '\0'; word[word_len] = '\0';
highlight_symbol(word);
word_len = 0; word_len = 0;
} highlight_symbol(word);
continue; continue;
} }
printf("%c", buffer[i]); printf("%c", buffer[i]);