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#include "stringop.h"
#include <stdlib.h>
#include <stdio.h>
#include "string.h"
#include "list.h"
#include <strings.h>
/* Note: This returns 8 characters for trimmed_start per tab character. */
char *strip_whitespace(char *_str, int *trimmed_start) {
*trimmed_start = 0;
if (*_str == '\0')
return _str;
char *strold = _str;
while (*_str == ' ' || *_str == '\t') {
if (*_str == '\t') {
*trimmed_start += 8;
} else {
*trimmed_start += 1;
}
_str++;
}
char *str = malloc(strlen(_str) + 1);
strcpy(str, _str);
free(strold);
int i;
for (i = 0; str[i] != '\0'; ++i);
do {
i--;
} while (i >= 0 && (str[i] == ' ' || str[i] == '\t'));
str[i + 1] = '\0';
return str;
}
char *strip_comments(char *str) {
int in_string = 0, in_character = 0;
int i = 0;
while (str[i] != '\0') {
if (str[i] == '"' && !in_character) {
in_string = !in_string;
} else if (str[i] == '\'' && !in_string) {
in_character = !in_character;
} else if (!in_character && !in_string) {
if (str[i] == '#' && i == 0) {
str[i] = '\0';
break;
}
}
++i;
}
return str;
}
list_t *split_string(const char *str, const char *delims) {
list_t *res = create_list();
int i, j;
for (i = 0, j = 0; i < strlen(str) + 1; ++i) {
if (strchr(delims, str[i]) || i == strlen(str)) {
if (i - j == 0) {
continue;
}
char *left = malloc(i - j + 1);
memcpy(left, str + j, i - j);
left[i - j] = 0;
list_add(res, left);
j = i + 1;
while (j <= strlen(str) && str[j] && strchr(delims, str[j])) {
j++;
i++;
}
free(left);
}
}
return res;
}
void free_flat_list(list_t *list) {
int i;
for (i = 0; i < list->length; ++i) {
free(list->items[i]);
}
list_free(list);
}
char *code_strstr(const char *haystack, const char *needle) {
/* TODO */
return strstr(haystack, needle);
}
char *code_strchr(const char *str, char delimiter) {
int in_string = 0, in_character = 0;
int i = 0;
while (str[i] != '\0') {
if (str[i] == '"' && !in_character) {
in_string = !in_string;
} else if (str[i] == '\'' && !in_string) {
in_character = !in_character;
} else if (!in_character && !in_string) {
if (str[i] == delimiter) {
return (char *)str + i;
}
}
++i;
}
return NULL;
}
int unescape_string(char *string) {
/* TODO: More C string escapes */
int len = strlen(string);
int i;
for (i = 0; string[i]; ++i) {
if (string[i] == '\\') {
--len;
switch (string[++i]) {
case '0':
string[i - 1] = '\0';
memmove(string + i, string + i + 1, len - i);
break;
case 'a':
string[i - 1] = '\a';
memmove(string + i, string + i + 1, len - i);
break;
case 'b':
string[i - 1] = '\b';
memmove(string + i, string + i + 1, len - i);
break;
case 't':
string[i - 1] = '\t';
memmove(string + i, string + i + 1, len - i);
break;
case 'n':
string[i - 1] = '\n';
memmove(string + i, string + i + 1, len - i);
break;
case 'v':
string[i - 1] = '\v';
memmove(string + i, string + i + 1, len - i);
break;
case 'f':
string[i - 1] = '\f';
memmove(string + i, string + i + 1, len - i);
break;
case 'r':
string[i - 1] = '\r';
memmove(string + i, string + i + 1, len - i);
break;
}
}
}
return len;
}
char *join_args(char **argv, int argc) {
int len = 0, i;
for (i = 0; i < argc; ++i) {
len += strlen(argv[i]) + 1;
}
char *res = malloc(len);
len = 0;
for (i = 0; i < argc; ++i) {
strcpy(res + len, argv[i]);
len += strlen(argv[i]);
res[len++] = ' ';
}
res[len - 1] = '\0';
return res;
}
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