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tmpl.c
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tmpl.c
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/* The default lexical-scanner template for Moonlime. Terms under which the
* generated code may be distributed, modified, etc. are provided by the
* lexer-writer below. */
%HEADER%
#include <stdlib.h>
typedef struct yy_%PREFIX%_state %PREFIX%_state;
%PREFIX%_state * %PREFIX%Init( void * (*alloc)(size_t),
void (*unalloc)(void *) );
void %PREFIX%Destroy( %PREFIX%_state *lexer );
int %PREFIX%Read( %PREFIX%_state *lexer, char *input, size_t len %UPARAM% );
%TOP%
typedef struct {
int done_num;
int trans_start;
int trans_end;
} yyml_fa;
typedef struct {
unsigned char transset[32];
int dest_state;
} yyml_trans;
typedef struct yy_%PREFIX%_state {
int is_in_error;
int curr_state; /* state of the DFA */
int curr_start_state; /* which DFA to use... */
int last_done_num;
int last_done_len;
size_t string_len;
size_t curr_buf_size;
void * (*alloc)(size_t);
void (*unalloc)(void *);
char *buf;
char start_buf[64];
} yyml_state;
static yyml_fa yy_x[] = {
%FASTATES%
};
static yyml_trans yy_y[] = {
%FATRANS%
};
static int yy_init_states[] = {
%FASTARTS%
};
%START_STATE_DEFS%
%PREFIX%_state * %PREFIX%Init( void * (*alloc)(size_t),
void (*unalloc)(void *) )
{
yyml_state *ms;
if(alloc == NULL || unalloc == NULL)
return NULL;
ms = alloc(sizeof(yyml_state));
if(ms == NULL)
return NULL;
ms->is_in_error = 0;
ms->curr_state = yy_init_states[YY_INITSTATE];
ms->curr_start_state = YY_INITSTATE;
ms->last_done_num = 0;
ms->last_done_len = 0;
ms->string_len = 0;
ms->curr_buf_size = 64;
ms->buf = ms->start_buf;
ms->alloc = alloc;
ms->unalloc = unalloc;
return ms;
}
void %PREFIX%Destroy( %PREFIX%_state *lexer )
{
yyml_state *ms = lexer;
if(ms == NULL)
return;
if(ms->buf != NULL && ms->buf != ms->start_buf) {
ms->unalloc(ms->buf);
}
ms->unalloc(ms);
}
static void yymoonlime_action(int done_num, const char *yytext, size_t yylen,
int *yy_start_state %YYUPARAM%);
static int yyrun_char(yyml_state *ms, char c, int add_to_buf, int len)
{
int curr_trans, end_trans, c_idx, c_mask, next_state, i;
char *new_buf;
curr_trans = yy_x[ms->curr_state].trans_start;
end_trans = yy_x[ms->curr_state].trans_end;
c_idx = ((unsigned char) c) >> 3;
c_mask = 1 << (c & 7);
if(add_to_buf) {
if(ms->string_len >= ms->curr_buf_size - 1) {
if((new_buf = ms->alloc(ms->curr_buf_size * 2)) == NULL) {
ms->is_in_error = 1;
return 0;
}
for(i = 0; i < ms->string_len; ++i)
new_buf[i] = ms->buf[i];
ms->curr_buf_size *= 2;
if(ms->buf != ms->start_buf)
ms->unalloc(ms->buf);
ms->buf = new_buf;
}
ms->buf[ms->string_len++] = c;
}
while(curr_trans < end_trans) {
if(yy_y[curr_trans].transset[c_idx] & c_mask) {
ms->curr_state = next_state = yy_y[curr_trans].dest_state;
if(yy_x[next_state].done_num) {
ms->last_done_num = yy_x[next_state].done_num;
ms->last_done_len = len;
}
return 1;
}
++curr_trans;
}
return 0;
}
static void yyreset_state(yyml_state *ms)
{
int i;
for(i = ms->last_done_len; i < ms->string_len; ++i)
ms->buf[i - ms->last_done_len] = ms->buf[i];
ms->string_len -= ms->last_done_len;
ms->last_done_len = ms->last_done_num = 0;
ms->curr_state = yy_init_states[ms->curr_start_state];
}
int %PREFIX%Read( %PREFIX%_state *lexer, char *input, size_t len %UPARAM% )
{
int done_relexing, i;
char *end = input + len;
yyml_state *ms = lexer;
if(ms == NULL || ms->is_in_error)
return 0;
if(len == 0) { /* Signifies EOF */
if(ms->string_len == 0)
return 1;
if(ms->last_done_num == 0) {
ms->is_in_error = 1;
return 0;
}
yymoonlime_action(ms->last_done_num, ms->buf, ms->last_done_len,
&(ms->curr_start_state) %UDATA%);
yyreset_state(ms);
while(ms->string_len > 0) {
for(i = 0; i < ms->string_len; ++i) {
if(!yyrun_char(ms, ms->buf[i], 0, i+1) ||
i == ms->string_len - 1) {
if(ms->is_in_error || ms->last_done_num == 0) {
ms->is_in_error = 1;
return 0;
}
yymoonlime_action(ms->last_done_num, ms->buf,
ms->last_done_len,
&(ms->curr_start_state) %UDATA%);
yyreset_state(ms);
break;
}
}
}
return 1;
}
while(input < end) {
if(!yyrun_char(ms, *input, 1, ms->string_len + 1)) { /* past pattern */
if(ms->is_in_error)
return 0;
if(ms->last_done_num == 0) { /* no pattern matches buf */
ms->is_in_error = 1;
return 0;
}
yymoonlime_action(ms->last_done_num, ms->buf, ms->last_done_len,
&(ms->curr_start_state) %UDATA%);
yyreset_state(ms);
/* Re-lex remaining part of the buffer */
done_relexing = 0;
while(ms->string_len > 0 && !done_relexing) {
i = 0;
while(i < ms->string_len) {
if(!yyrun_char(ms, ms->buf[i], 0, i+1)) {
if(!ms->is_in_error && ms->last_done_num == 0)
ms->is_in_error = 1;
if(ms->is_in_error)
return 0;
yymoonlime_action(ms->last_done_num, ms->buf,
ms->last_done_len,
&(ms->curr_start_state) %UDATA%);
yyreset_state(ms);
i = 0;
continue;
}
++i;
}
if(i == ms->string_len)
done_relexing = 1;
}
}
++input;
}
return 1;
}
#define YYSTART(x) do { *yy_start_state = YY_STATE_ ## x ; } while(0)
static void yymoonlime_action(int done_num, const char *yytext, size_t yylen,
int *yy_start_state %YYUPARAM%)
{
switch(done_num) {
%ACTIONS%
}
if((*yy_start_state < 0) || (*yy_start_state > YY_MAXSTATE))
*yy_start_state = YY_INITSTATE;
}