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// parse.c
// includes
#include <string.h>
#include "parse.h"
#include "util.h"
// variables
char * Star[STAR_NUMBER];
// prototypes
static bool match_rec (char string[], const char pattern[], char * star[]);
// functions
// match()
bool match(char string[], const char pattern[]) {
ASSERT(string!=NULL);
ASSERT(pattern!=NULL);
ASSERT(strstr(pattern,"**")==NULL);
return match_rec(string,pattern,Star);
}
// match_rec()
static bool match_rec(char string[], const char pattern[], char * star[]) {
int c;
ASSERT(string!=NULL);
ASSERT(pattern!=NULL);
ASSERT(star!=NULL);
// iterative matches
while ((c=*pattern++) != '*') {
if (FALSE) {
} else if (c == '\0') { // end of pattern
while (*string == ' ') string++; // skip trailing spaces
return *string == '\0';
} else if (c == ' ') { // spaces
if (*string++ != ' ') return FALSE; // mismatch
while (*string == ' ') string++; // skip trailing spaces
} else { // normal character
if (*string++ != c) return FALSE; // mismatch
}
}
// recursive wildcard match
ASSERT(c=='*');
while (*string == ' ') string++; // skip leading spaces
*star++ = string; // remember beginning of star
while ((c=*string++) != '\0') { // reject empty-string match
if (c != ' ' && match_rec(string,pattern,star)) { // shortest match
ASSERT(string>star[-1]);
*string = '\0'; // truncate star
return TRUE;
}
}
return FALSE;
}
// parse_is_ok()
bool parse_is_ok(const parse_t * parse) {
if (parse == NULL) return FALSE;
if (parse->string == NULL) return FALSE;
if (parse->pos < 0 || parse->pos > (int) strlen(parse->string)) return FALSE;
if (parse->keyword_nb < 0 || parse->keyword_nb >= KEYWORD_NUMBER) return FALSE;
return TRUE;
}
// parse_open()
void parse_open(parse_t * parse, const char string[]) {
ASSERT(parse!=NULL);
ASSERT(string!=NULL);
parse->string = string;
parse->pos = 0;
parse->keyword_nb = 0;
}
// parse_close()
void parse_close(parse_t * parse) {
int i;
ASSERT(parse_is_ok(parse));
parse->string = NULL;
parse->pos = 0;
for (i = 0; i < parse->keyword_nb; i++) {
my_string_clear(&parse->keyword[i]);
}
parse->keyword_nb = 0;
}
// parse_add_keyword()
void parse_add_keyword(parse_t * parse, const char keyword[]) {
const char * * string;
ASSERT(parse_is_ok(parse));
ASSERT(keyword!=NULL);
if (parse->keyword_nb < KEYWORD_NUMBER) {
string = &parse->keyword[parse->keyword_nb];
parse->keyword_nb++;
*string = NULL;
my_string_set(string,keyword);
}
}
// parse_get_word()
bool parse_get_word(parse_t * parse, char string[], int size) {
int pos;
int c;
ASSERT(parse!=NULL);
ASSERT(string!=NULL);
ASSERT(size>=256);
// skip blanks
for (; parse->string[parse->pos] == ' '; parse->pos++)
;
ASSERT(parse->string[parse->pos]!=' ');
// copy word
pos = 0;
while (TRUE) {
c = parse->string[parse->pos];
if (c == ' ' || pos >= size-1) c = '\0';
string[pos] = c;
if (c == '\0') break;
parse->pos++;
pos++;
}
ASSERT(strchr(string,' ')==NULL);
return pos > 0; // non-empty word?
}
// parse_get_string()
bool parse_get_string(parse_t * parse, char string[], int size) {
int pos;
parse_t parse_2[1];
char word[StringSize];
int i;
int c;
ASSERT(parse!=NULL);
ASSERT(string!=NULL);
ASSERT(size>=256);
// skip blanks
for (; parse->string[parse->pos] == ' '; parse->pos++)
;
ASSERT(parse->string[parse->pos]!=' ');
// copy string
pos = 0;
while (TRUE) {
parse_open(parse_2,&parse->string[parse->pos]);
if (!parse_get_word(parse_2,word,StringSize)) {
string[pos] = '\0';
parse_close(parse_2);
goto finished;
}
for (i = 0; i < parse->keyword_nb; i++) {
if (my_string_equal(parse->keyword[i],word)) {
string[pos] = '\0';
parse_close(parse_2);
goto finished;
}
}
parse_close(parse_2);
// copy spaces
while (TRUE) {
c = parse->string[parse->pos];
if (c != ' ') break;
if (pos >= size-1) c = '\0';
string[pos] = c;
if (c == '\0') break;
parse->pos++;
pos++;
}
// copy non spaces
while (TRUE) {
c = parse->string[parse->pos];
if (c == ' ' || pos >= size-1) c = '\0';
string[pos] = c;
if (c == '\0') break;
parse->pos++;
pos++;
}
string[pos] = '\0';
}
finished: ;
return pos > 0; // non-empty string?
}
// end of parse.cpp
|
