forked from GitHub/gf-core
remove the pgf-service util which is obsolete anyway
This commit is contained in:
kr.angelov
@@ -1,291 +0,0 @@
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#include <stdarg.h>
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#include <gu/map.h>
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#include <gu/dump.h>
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#include <gu/log.h>
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#include <gu/enum.h>
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#include <gu/file.h>
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#include <pgf/pgf.h>
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#include <pgf/literals.h>
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#include <pgf/parser.h>
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#define NO_FCGI_DEFINES
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#include <fcgi_stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#define ISXDIGIT(c) ( \
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(c >= 48 && c <= 57) || \
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((c & ~0x20) >= 65 && (c & ~0x20) <= 70) \
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)
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void
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url_escape(char *str)
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{
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char *pr = str, *pw = str;
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size_t len = strlen(str);
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for (;;) {
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if (((size_t) (pr - str)) >= len)
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break;
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if (*pr == '%' &&
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(((size_t) (pr - str))+2) < len &&
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ISXDIGIT(*(pr+1)) &&
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ISXDIGIT(*(pr+2)))
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{
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pr++;
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char hexstr[3];
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hexstr[0] = *pr++;
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hexstr[1] = *pr++;
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hexstr[2] = 0;
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char *ptr;
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int ch = strtoul(hexstr, &ptr, 16);
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*pw++ = (char) (ch & 0x7f);
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}
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else if(*pr == '+') {
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*pw++ = ' ';
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}
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else {
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*pw++ = *pr++;
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}
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}
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*pw++ = 0;
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}
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static int
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render(PgfPGF* pgf, PgfExpr expr, GuPool* pool)
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{
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int pid;
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int pc[2]; /* Parent to child pipe */
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int cp[2]; /* Child to parent pipe */
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char ch;
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/* Make pipes */
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if (pipe(pc) < 0)
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return 0;
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if (pipe(cp) < 0)
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return 0;
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/* Create a child to run command. */
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switch (pid = fork())
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{
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case -1:
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return 0;
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case 0:
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/* Child. */
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dup2(cp[1], 1); /* Make stdout go to write
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end of pipe. */
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dup2(pc[0], 0); /* Make stdin come from read
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end of pipe. */
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close(pc[1]);
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close(cp[0]);
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char *args[] = {"dot", "-Tsvg", NULL};
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execvp(args[0], args);
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exit(1);
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default: {
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/* Parent. */
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FILE* fstream = fdopen(pc[1], "w");
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GuOut* out = gu_file_out(fstream, pool);
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GuExn* err = gu_new_exn(NULL, gu_kind(type), pool);
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pgf_graphviz_abstract_tree(pgf, expr, out, err);
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fclose(fstream);
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close(cp[1]);
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while (read(cp[0], &ch, 1) == 1)
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{
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FCGI_putchar(ch);
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}
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return 1;
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}
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}
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}
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static void
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put_gu_string(GuString s) {
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GuWord w = s.w_;
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uint8_t buf[sizeof(GuWord)];
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char* src;
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size_t len;
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if (w & 1) {
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len = (w & 0xff) >> 1;
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gu_assert(len <= sizeof(GuWord));
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size_t i = len;
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while (i > 0) {
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w >>= 8;
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buf[--i] = w & 0xff;
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}
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src = (char*) buf;
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} else {
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uint8_t* p = (void*) w;
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len = (p[0] == 0) ? ((size_t*) p)[-1] : p[0];
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src = (char*) &p[1];
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}
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for (size_t i = 0; i < len; i++) {
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FCGI_putchar(src[i]);
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}
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}
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static void
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linearize(PgfConcr* concr, PgfExpr expr, GuPool* pool)
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{
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GuStringBuf* sbuf = gu_string_buf(pool);
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GuOut* out = gu_string_buf_out(sbuf);
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GuExn* err = gu_new_exn(NULL, gu_kind(type), pool);
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pgf_linearize(concr, expr, out, err);
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GuString s = gu_string_buf_freeze(sbuf, pool);
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put_gu_string(s);
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}
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static void
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print_lang(GuMapItor* fn, const void* key, void* value, GuExn* err)
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{
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PgfCId lang = *((PgfCId*) key);
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put_gu_string(lang);
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FCGI_putchar(' ');
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}
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int main ()
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{
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// Create the pool that is used to allocate everything
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GuPool* pool = gu_new_pool();
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int status = EXIT_SUCCESS;
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// Create an exception frame that catches all errors.
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GuExn* err = gu_new_exn(NULL, gu_kind(type), pool);
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char* grammar_path = getenv("GRAMMAR_PATH");
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if (grammar_path == NULL) {
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fprintf(stderr, "Please set the GRAMMAR_PATH variable\n");
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status = EXIT_FAILURE;
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goto fail;
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}
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// Read the PGF grammar.
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char* grammar_name = "/ParseEngAbs.pgf";
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char* grammar_file = malloc(strlen(grammar_path)+strlen(grammar_name)+1);
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strcpy(grammar_file,grammar_path);
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strcat(grammar_file,grammar_name);
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PgfPGF* pgf = pgf_read(grammar_file, pool, err);
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free(grammar_file);
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// If an error occured, it shows in the exception frame
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if (!gu_ok(err)) {
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fprintf(stderr, "Reading PGF failed\n");
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status = EXIT_FAILURE;
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goto fail;
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}
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// Read the extra probs.
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char* probs_name = "/ParseEngAbs3.probs";
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char* probs_file = malloc(strlen(grammar_path)+strlen(probs_name)+1);
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strcpy(probs_file,grammar_path);
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strcat(probs_file,probs_name);
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pgf_load_meta_child_probs(pgf, probs_file, pool, err);
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free(probs_file);
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if (!gu_ok(err)) {
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fprintf(stderr, "Loading meta child probs failed\n");
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status = EXIT_FAILURE;
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goto fail;
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}
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GuString cat = "Phr";
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GuString from_lang = "ParseEng";
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PgfConcr* from_concr =
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pgf_get_language(pgf, from_lang);
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if (!from_concr) {
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status = EXIT_FAILURE;
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goto fail;
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}
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// Register a callback for the literal category Symbol
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pgf_parser_add_literal(from_concr, "Symb",
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&pgf_nerc_literal_callback);
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while (FCGI_Accept() >= 0) {
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char* query = getenv("QUERY_STRING");
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char sentence[202];
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char to_lang_buf[51] = "";
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if (query == NULL ||
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sscanf(query, "sentence=%200[^&]&to=%50[^&]", sentence, to_lang_buf) < 1) {
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FCGI_printf("Status: 200 OK\r\n");
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FCGI_printf("Content-type: text/plain; charset=utf-8\r\n\r\n");
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GuMapItor clo = { print_lang };
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pgf_iter_languages(pgf, &clo, NULL);
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FCGI_putchar('\n');
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} else {
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// We create a temporary pool for translating a single
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// sentence, so our memory usage doesn't increase over time.
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GuPool* ppool = gu_new_pool();
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PgfConcr* to_concr = NULL;
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if (strlen(to_lang_buf) > 0) {
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GuString to_lang = to_lang_buf;
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to_concr =
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pgf_get_language(pgf, to_lang);
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if (!to_concr) {
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status = EXIT_FAILURE;
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goto fail;
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}
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}
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url_escape(sentence);
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int len = strlen(sentence);
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sentence[len] = '\n';
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sentence[len+1] = '\0';
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GuReader *rdr =
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gu_string_reader(sentence, ppool);
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PgfLexer *lexer =
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pgf_new_simple_lexer(rdr, ppool);
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GuEnum* result =
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pgf_parse(from_concr, cat, lexer, ppool, ppool);
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if (result == NULL) {
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FCGI_printf("Status: 500 Internal Server Error\r\n");
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FCGI_printf("Content-type: text/plain\r\n"
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"\r\n"
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"Parsing failed");
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goto done;
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}
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PgfExprProb* ep = gu_next(result, PgfExprProb*, ppool);
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if (ep == NULL) {
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FCGI_printf("Status: 500 Internal Server Error\r\n");
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FCGI_printf("Content-type: text/plain\r\n"
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"\r\n"
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"The sentence was parsed but there was no tree constructed");
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goto done;
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}
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FCGI_printf("Status: 200 OK\r\n");
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if (to_concr == NULL) {
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FCGI_printf("Content-type: image/svg+xml\r\n\r\n");
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render(pgf, ep->expr, ppool);
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} else {
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FCGI_printf("Content-type: text/plain; charset=utf-8\r\n\r\n");
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linearize(to_concr, ep->expr, ppool);
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}
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done:
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gu_pool_free(ppool);
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}
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}
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fail:
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gu_pool_free(pool);
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return status;
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}
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