Read stdin if no argument supplied
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parent
c0877d1a51
commit
652f3fc6a4
SSH key fingerprint:
SHA256:B/hgVwUoBpx5vdNsXl9w8XwZljA9766uk6T4ubZp5HM
1 changed files with 121 additions and 108 deletions
229
nsh.c
229
nsh.c
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@ -210,132 +210,145 @@ void highlight_include(const char *line, int *i)
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}
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}
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/* Main function to process input */
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int main(int argc, char **argv)
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void highlight(char *filename)
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{
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if (argc < 2) {
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fprintf(stderr, "nsh <file> <file2> ...\n");
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exit(1);
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}
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for (int i = 1; i < argc; i++) {
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FILE *f = fopen(argv[i], "r");
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char *ext;
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FILE *f;
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if (filename == NULL) {
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f = stdin;
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} else {
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f = fopen(filename, "r");
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if (!f) {
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fprintf(stderr, "Unable to open file: %s\n", argv[i]);
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fprintf(stderr, "Unable to open file: %s\n", filename);
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exit(1);
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}
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/* Handle file without extension */
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char *ext = strrchr(argv[i], '.');
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ext = strrchr(filename, '.');
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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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ext++;
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}
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char buffer[1024];
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char word[256];
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int word_len = 0;
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}
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while (fgets(buffer, sizeof(buffer), f) != NULL) {
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if (ext && strcmp(ext, "c") == 0) {
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for (int i = 0; buffer[i] != '\0'; i++) {
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if (buffer[i] == '\t') {
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printf(" ");
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char buffer[1024];
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char word[256];
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int word_len = 0;
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while (fgets(buffer, sizeof(buffer), f) != NULL) {
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if (ext && strcmp(ext, "c") == 0) {
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for (int i = 0; buffer[i] != '\0'; i++) {
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if (buffer[i] == '\t') {
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printf(" ");
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continue;
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}
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if (buffer[i] == '\'') {
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highlight_char(buffer, &i);
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continue;
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}
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if (buffer[i] == '"') {
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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] != '\0' && buffer[i-1] == 'e') ||
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(buffer[i-1] != '\0' && buffer[i-1] == ' ' &&
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buffer[i-2] != '\0' && 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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if (buffer[i] == '\'') {
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highlight_char(buffer, &i);
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continue;
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}
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if (buffer[i] == '"') {
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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] != '\0' && buffer[i-1] == 'e') ||
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(buffer[i-1] != '\0' && buffer[i-1] == ' ' &&
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buffer[i-2] != '\0' && 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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}
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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]) &&
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buffer[i] != '_' && buffer[i] != '#')) {
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if (word_len > 0) {
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word[word_len] = '\0';
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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);
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} else if (is_keyword(word)) {
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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] == ']' ||
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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] == '&' ||
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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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word[word_len] = '\0';
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word_len = 0;
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highlight_symbol(word);
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continue;
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}
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printf("%c", buffer[i]);
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} else if (isdigit(buffer[i]) ) {
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word[word_len++] = buffer[i];
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if (isdigit(buffer[i+1]) == 0) {
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word[word_len] = '\0';
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highlight_number(word);
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word_len = 0;
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}
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} else {
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word[word_len++] = buffer[i];
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}
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}
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} else {
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/* Remove newline from buffer, if present */
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size_t len = strlen(buffer);
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if (len > 0 && buffer[len - 1] == '\n') {
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buffer[len - 1] = '\0';
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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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}
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if (strncmp(buffer, "---", 3) == 0) {
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printf(COLOR_YELLOW "%s" COLOR_RESET "\n", buffer);
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} else if (strncmp(buffer, "+++", 3) == 0) {
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printf(COLOR_PEACH "%s" COLOR_RESET "\n", buffer);
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} else if (strncmp(buffer, "@@", 2) == 0) {
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printf(COLOR_OVERLAY0 "%s" COLOR_RESET "\n", buffer);
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} else if (strncmp(buffer, "index", 5) == 0) {
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printf(COLOR_TEAL "%s" COLOR_RESET "\n", buffer);
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} else if (strncmp(buffer, "diff", 4) == 0) {
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printf(COLOR_BLUE "%s" COLOR_RESET "\n", buffer);
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} else if (buffer[0] == '+') {
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printf(COLOR_GREEN "%s" COLOR_RESET "\n", buffer);
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} else if (buffer[0] == '-') {
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printf(COLOR_RED "%s" COLOR_RESET "\n", buffer);
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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]) &&
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buffer[i] != '_' && buffer[i] != '#')) {
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if (word_len > 0) {
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word[word_len] = '\0';
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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);
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} else if (is_keyword(word)) {
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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] == ']' ||
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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] == '&' ||
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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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word[word_len] = '\0';
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word_len = 0;
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highlight_symbol(word);
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continue;
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}
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printf("%c", buffer[i]);
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} else if (isdigit(buffer[i]) ) {
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word[word_len++] = buffer[i];
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if (isdigit(buffer[i+1]) == 0) {
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word[word_len] = '\0';
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highlight_number(word);
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word_len = 0;
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}
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} else {
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printf("%s\n", buffer);
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word[word_len++] = buffer[i];
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}
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}
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} else {
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/* Remove newline from buffer, if present */
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size_t len = strlen(buffer);
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if (len > 0 && buffer[len - 1] == '\n') {
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buffer[len - 1] = '\0';
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}
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if (strncmp(buffer, "---", 3) == 0) {
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printf(COLOR_YELLOW "%s" COLOR_RESET "\n", buffer);
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} else if (strncmp(buffer, "+++", 3) == 0) {
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printf(COLOR_PEACH "%s" COLOR_RESET "\n", buffer);
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} else if (strncmp(buffer, "@@", 2) == 0) {
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printf(COLOR_OVERLAY0 "%s" COLOR_RESET "\n", buffer);
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} else if (strncmp(buffer, "index", 5) == 0) {
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printf(COLOR_TEAL "%s" COLOR_RESET "\n", buffer);
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} else if (strncmp(buffer, "diff", 4) == 0) {
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printf(COLOR_BLUE "%s" COLOR_RESET "\n", buffer);
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} else if (buffer[0] == '+') {
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printf(COLOR_GREEN "%s" COLOR_RESET "\n", buffer);
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} else if (buffer[0] == '-') {
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printf(COLOR_RED "%s" COLOR_RESET "\n", buffer);
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} else {
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printf("%s\n", buffer);
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}
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}
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}
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}
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/* Main function to process input */
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int main(int argc, char **argv)
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{
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if (argc > 1) {
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for (int i = 1; i < argc; i++) {
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highlight(argv[i]);
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}
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} else {
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highlight(NULL);
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}
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return 0;
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}
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