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#include "common.h"
// -----------------------------------------------------------------------
// input functions
int
parse(io·Stream *io, int nfield, char **field, int len, char *line)
{
int n;
if((n=io·readln(io, len, line)) <= 0)
return ParseEOF;
if(n == len)
panicf("line too long");
if(line[n-1] != '\n')
panicf("invalid line: expected '\n', found '%c'", line[n]);
line[n-1] = 0;
if(line[0] == '#' || line[0] == 0)
return ParseSkip;
/* tokenize line into fields */
n = 0;
field[n] = line;
while(*line){
if(*line == ';'){
*line = 0;
field[++n] = line+1;
}
line++;
}
if(n != nfield-1)
panicf("expected %d number of fields, got %d: %s", nfield, n, line);
return ParseOK;
}
int
codepoint(char *s)
{
int c, b;
c = 0;
while((b=*s++)){
c <<= 4;
if(b >= '0' && b <= '9')
c += b - '0';
else if(b >= 'A' && b <= 'F')
c += b - 'A' + 10;
else
panicf("bad codepoint char '%c'", b);
}
return c;
}
void
codepointrange(io·Stream *utf8, char *field[NumFields], int *start, int *stop)
{
int e, c;
char *other[NumFields], line[1024];
// XXX: the stop variable passes in the previous stopping character
e = *stop;
c = codepoint(field[Fcode]);
if(c >= NumRunes)
panicf("unexpected large codepoint %x", c);
if(c <= e)
panicf("bad code sequence: %x then %x", e, c);
e = c;
if(strstr(field[Fname], ", First>") != nil){
if(!parse(utf8, arrlen(other), other, arrlen(line), line))
panicf("range start at end of file");
if(strstr(other[Fname], ", Last>") == nil)
panicf("range start not followed by range end");
e = codepoint(other[Fcode]);
if(e <= c)
panicf("bad code sequence: %x then %x", c, e);
if(strcmp(field[Fcategory], other[Fcategory]) != 0)
panicf("range with mismatched category");
}
*start = c;
*stop = e;
}
// -----------------------------------------------------------------------
// output functions
void
putsearch(void)
{
puts(
"#include <u.h>\n"
"#include <libunicode.h>\n"
"\n"
"static\n"
"rune*\n"
"rangesearch(rune c, rune *t, int n, int ne)\n"
"{\n"
" rune *p;\n"
" int m;\n"
" while(n > 1) {\n"
" m = n >> 1;\n"
" p = t + m*ne;\n"
" if(c >= p[0]){\n"
" t = p;\n"
" n = n-m;\n"
" }else\n"
" n = m;\n"
" }\n"
" if(n && c >= t[0])\n"
" return t;\n"
" return 0;\n"
"}\n"
);
}
int
putrange(char *ident, char *prop, int force)
{
int l, r, start;
start = 0;
for(l = 0; l < NumRunes;) {
if(!prop[l]){
l++;
continue;
}
for(r = l+1; r < NumRunes; r++){
if(!prop[r])
break;
prop[r] = 0;
}
if(force || r > l + 1){
if(!start){
printf("static rune %s[] = {\n", ident);
start = 1;
}
prop[l] = 0;
printf("\t0x%.4x, 0x%.4x,\n", l, r-1);
}
l = r;
}
if(start)
printf("};\n\n");
return start;
}
int
putpair(char *ident, char *prop)
{
int l, r, start;
start = 0;
for(l=0; l+2 < NumRunes; ){
if(!prop[l]){
l++;
continue;
}
for(r = l + 2; r < NumRunes; r += 2){
if(!prop[r])
break;
prop[r] = 0;
}
if(r != l + 2){
if(!start){
printf("static rune %s[] = {\n", ident);
start = 1;
}
prop[l] = 0;
printf("\t0x%.4x, 0x%.4x,\n", l, r - 2);
}
l = r;
}
if(start)
printf("};\n\n");
return start;
}
int
putsingle(char *ident, char *prop)
{
int i, start;
start = 0;
for(i = 0; i < NumRunes; i++) {
if(!prop[i])
continue;
if(!start){
printf("static rune %s[] = {\n", ident);
start = 1;
}
prop[i] = 0;
printf("\t0x%.4x,\n", i);
}
if(start)
printf("};\n\n");
return start;
}
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