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#include <ctype.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "poparser.h"
#include "StringEscape.h"
#define streq(A, B) (!strcmp(A, B))
#define strstarts(S, W) (memcmp(S, W, sizeof(W) - 1) ? NULL : (S + (sizeof(W) - 1)))
static enum po_entry get_type_and_start(char* lp, char* end, size_t *stringstart) {
enum po_entry result_type;
char *x, *y;
size_t start = (size_t) lp;
while(isspace(*lp) && lp < end) lp++;
if(lp[0] == '#') {
inv:
*stringstart = 0;
return pe_invalid;
}
if((y = strstarts(lp, "msg"))) {
if((x = strstarts(y, "id")) && (isspace(*x) || ((x = strstarts(x, "_plural")) && isspace(*x))))
result_type = pe_msgid;
else if ((x = strstarts(y, "str")) && (isspace(*x) ||
(x[0] == '[' && (x[1] == '0' || x[1] == '1') && x[2] == ']' && (x += 3) && isspace(*x))))
result_type = pe_msgstr;
else
goto inv;
while(isspace(*x) && x < end) x++;
if(*x != '"') abort();
conv:
*stringstart = ((size_t) x - start) + 1;
} else if(*lp == '"') {
result_type = pe_str;
x = lp;
goto conv;
} else {
goto inv;
}
return result_type;
}
/* expects a pointer to the first char after a opening " in a string,
* converts the string into convbuf, and returns the length of that string */
static size_t get_length_and_convert(char* x, char* end, char* convbuf, size_t convbuflen) {
size_t result = 0;
char* e = x + strlen(x);
assert(e > x && e < end && *e == 0);
e--;
while(isspace(*e)) e--;
if(*e != '"') abort();
*e = 0;
result = unescape(x, convbuf, convbuflen);
return result;
}
void poparser_init(struct po_parser *p, char* workbuf, size_t bufsize, poparser_callback cb, void* cbdata) {
p->buf = workbuf;
p->bufsize = bufsize;
p->cb = cb;
p->prev_type = pe_invalid;
p->curr_len = 0;
p->cbdata = cbdata;
}
enum lineactions {
la_incr,
la_proc,
la_abort,
la_nop,
la_max,
};
/* return 0 on success */
int poparser_feed_line(struct po_parser *p, char* line, size_t buflen) {
char *convbuf = p->buf;
size_t convbuflen = p->bufsize;
size_t strstart;
static const enum lineactions action_tbl[pe_max][pe_max] = {
// pe_str will never be set as curr_type
[pe_str] = {
[pe_str] = la_abort,
[pe_msgid] = la_abort,
[pe_msgstr] = la_abort,
[pe_invalid] = la_abort,
},
[pe_msgid] = {
[pe_str] = la_incr,
[pe_msgid] = la_proc,
[pe_msgstr] = la_proc,
[pe_invalid] = la_proc,
},
[pe_msgstr] = {
[pe_str] = la_incr,
[pe_msgid] = la_proc,
[pe_msgstr] = la_proc,
[pe_invalid] = la_proc,
},
[pe_invalid] = {
[pe_str] = la_nop, // this can happen when we have msgstr[2] "" ... "foo", since we only parse msgstr[0] and [1]
[pe_msgid] = la_incr,
[pe_msgstr] = la_incr,
[pe_invalid] = la_nop,
},
};
enum po_entry type;
type = get_type_and_start(line, line + buflen, &strstart);
switch(action_tbl[p->prev_type][type]) {
case la_incr:
assert(type == pe_msgid || type == pe_msgstr || type == pe_str);
p->curr_len += get_length_and_convert(line + strstart, line + buflen, convbuf + p->curr_len, convbuflen - p->curr_len);
break;
case la_proc:
assert(p->prev_type == pe_msgid || p->prev_type == pe_msgstr);
p->info.text = convbuf;
p->info.textlen = p->curr_len;
p->info.type = p->prev_type;
p->cb(&p->info, p->cbdata);
if(type != pe_invalid)
p->curr_len = get_length_and_convert(line + strstart, line + buflen, convbuf, convbuflen);
else
p->curr_len = 0;
break;
case la_nop:
break;
case la_abort:
default:
abort();
// todo : return error code
}
if(type != pe_str) {
p->prev_type = type;
}
return 0;
}
int poparser_finish(struct po_parser *p) {
char empty[4] = "";
return poparser_feed_line(p, empty, sizeof(empty));
}
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