From bf42a95568f5efffcc87a9b5a7683b7b270a098f Mon Sep 17 00:00:00 2001 From: "Rafael G. Martins" Date: Fri, 17 Apr 2015 23:49:55 -0300 Subject: replaced leg-based parser with handmade parser for templates yay! no leg parser needed anymore. parsers still needs some work and error handling, though. --- src/template-grammar.leg | 200 ----------------------------------------------- 1 file changed, 200 deletions(-) delete mode 100644 src/template-grammar.leg (limited to 'src/template-grammar.leg') diff --git a/src/template-grammar.leg b/src/template-grammar.leg deleted file mode 100644 index 2425582..0000000 --- a/src/template-grammar.leg +++ /dev/null @@ -1,200 +0,0 @@ -# -# blogc: A blog compiler. -# Copyright (C) 2015 Rafael G. Martins -# -# This program can be distributed under the terms of the BSD License. -# See the file COPYING. -# - -%{ - -#include -#include "utils/utils.h" -#include "template-grammar.h" - -#define YY_INPUT(buf, result, max_size) \ -{ \ - int yyc = (charbuf && *charbuf != '\0') ? *charbuf++ : EOF; \ - result = (EOF == yyc) ? 0 : (*buf = yyc, 1); \ -} - - -static b_slist_t *stmts = NULL; -static int if_count = 0; -static int block_count = 0; -static const char *charbuf = NULL; - - -static void -blogc_template_if_stmt(const char *value) -{ - if (block_count <= 0) { - fprintf(stderr, "Syntax error: {" "%% if ... %%" "} statement before " - "any {" "%% block ... %%" "} statement\n"); - exit(1); - } - blogc_template_stmt_t *stmt = malloc(sizeof(blogc_template_stmt_t)); - stmt->value = b_strdup(value); - stmt->type = BLOGC_TEMPLATE_IF_STMT; - stmts = b_slist_append(stmts, stmt); - if_count++; -} - - -static void -blogc_template_else_stmt(void) -{ - if (if_count <= 0) { - fprintf(stderr, "Syntax error: {" "%% else %%" "} statement without " - "any open {" "%% if ... %%" "} statement\n"); - exit(1); - } - blogc_template_stmt_t *stmt = malloc(sizeof(blogc_template_stmt_t)); - stmt->value = NULL; - stmt->type = BLOGC_TEMPLATE_ELSE_STMT; - stmts = b_slist_append(stmts, stmt); -} - - -static void -blogc_template_endif_stmt(void) -{ - if (if_count-- <= 0) { - fprintf(stderr, "Syntax error: {" "%% endif %%" "} statement before " - "any {" "%% if ... %%" "} statement\n"); - exit(1); - } - blogc_template_stmt_t *stmt = malloc(sizeof(blogc_template_stmt_t)); - stmt->value = NULL; - stmt->type = BLOGC_TEMPLATE_ENDIF_STMT; - stmts = b_slist_append(stmts, stmt); -} - - -static void -blogc_template_block_stmt(const char *value) -{ - if (block_count > 0) { - fprintf(stderr, "Syntax error: {" "%% block %%" "} statements " - "can't be nested\n"); - exit(1); - } - blogc_template_stmt_t *stmt = malloc(sizeof(blogc_template_stmt_t)); - stmt->value = b_strdup(value); - stmt->type = BLOGC_TEMPLATE_BLOCK_STMT; - stmts = b_slist_append(stmts, stmt); - block_count++; -} - - -static void -blogc_template_endblock_stmt(void) -{ - if (block_count-- <= 0) { - fprintf(stderr, "Syntax error: {" "%% endblock %%" "} statement before " - "any {" "%% block ... %%" "} statement\n"); - exit(1); - } - blogc_template_stmt_t *stmt = malloc(sizeof(blogc_template_stmt_t)); - stmt->value = NULL; - stmt->type = BLOGC_TEMPLATE_ENDBLOCK_STMT; - stmts = b_slist_append(stmts, stmt); -} - - -static void -blogc_template_variable_stmt(const char *value) -{ - if (block_count <= 0) { - fprintf(stderr, "Syntax error: {{ ... }} statement before " - "any {" "%% block ... %%" "} statement\n"); - exit(1); - } - blogc_template_stmt_t *stmt = malloc(sizeof(blogc_template_stmt_t)); - stmt->value = b_strdup(value); - stmt->type = BLOGC_TEMPLATE_VARIABLE_STMT; - stmts = b_slist_append(stmts, stmt); -} - - -static void -blogc_template_content_stmt(const char *value) -{ - blogc_template_stmt_t *stmt = malloc(sizeof(blogc_template_stmt_t)); - stmt->value = b_strdup(value); - stmt->type = BLOGC_TEMPLATE_CONTENT_STMT; - stmts = b_slist_append(stmts, stmt); -} - -%} - -page = if | else | endif | block | endblock | print | content | anything - { fprintf(stderr, "Syntax error near: %s\n", yytext); exit(1); } - - -# Useful rules -eol = '\n' | '\r\n' | '\r' -eof = !. -- = [\t ]* -id = [A-Z][A-Z0-9_]* -anything = < ( !eol . )* > eol - -# Conditionals -if_open = '{%' - -if_close = - '%}' -if = if_open 'if' ' '+ < id > if_close { blogc_template_if_stmt(yytext); } -else = if_open 'else' if_close { blogc_template_else_stmt(); } -endif = if_open 'endif' if_close { blogc_template_endif_stmt(); } - -# Blocks -block_open = '{%' - -block_close = - '%}' -block_name = ( 'single_source' | 'multiple_sources_once' | 'multiple_sources' ) -block = block_open 'block' ' '+ < block_name > block_close { blogc_template_block_stmt(yytext); } -endblock = block_open 'endblock' block_close { blogc_template_endblock_stmt(); } - -# Print calls -print_open = '{{' - -print_close = - '}}' -print_var = < id > { blogc_template_variable_stmt(yytext); } -print = print_open print_var print_close - -# Generic content -content = < ( !eof !if_open !if_close !block_open !block_close !print_open !print_close . )+ > - { blogc_template_content_stmt(yytext); } - -%% - - -void -blogc_template_free_stmts(b_slist_t *stmts) -{ - for (b_slist_t *tmp = stmts; tmp != NULL; tmp = tmp->next) { - blogc_template_stmt_t *data = tmp->data; - free(data->value); - free(data); - } - b_slist_free(stmts); -} - - -b_slist_t* -blogc_template_parse(const char *tmpl) -{ - if_count = 0; - block_count = 0; - charbuf = tmpl; - while(yyparse()); - if (if_count != 0) { - fprintf(stderr, "Syntax error: You left %d open {" "%% if ... %%" "} statements.\n", if_count); - exit(1); - } - if (block_count != 0) { - fprintf(stderr, "Syntax error: You left %d open {" "%% block ... %%" "} statements.\n", block_count); - exit(1); - } - b_slist_t *rv = stmts; - charbuf = NULL; - stmts = NULL; - return rv; -} -- cgit v1.2.3-18-g5258