239 lines
4.7 KiB
C
239 lines
4.7 KiB
C
#include "tex_table.h"
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#include <string.h>
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#include <ctype.h>
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#include "tex_table_tags.h"
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#include "zalloc_ext.h"
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#include "zalloc.h"
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#include "c_const.h"
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/* unnecessary includes */
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#include <stdio.h>
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enum tex_parse_err {
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TEX_PARSING_NOERROR = 0,
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TEX_PARSING_ERROR_UNDEF,
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TEX_PARSING_ERROR_STACKOVERFLOW
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};
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char * const TEX_PARSING_ERROR_UNDEF_STR = "unknown parsing error";
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char * const TEX_PARSING_ERROR_STACKOVERFLOW_STR = "parser stack overflow";
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int parse_table(const char *table_source, size_t len, struct table_s *table, struct xerror_s *error)
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{
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char *tag = NULL;/*,
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*brpar = NULL;*/
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size_t i = 0;
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if (!len)
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len = strlen(table_source);
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enum where_e
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{
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IN_UNDEF = 0, // undefined place
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IN_COMMENT, // any comment
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IN_TAG, // any tag
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IN_TAGPARM, // in \tag{} curly braces
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IN_TAG_BEGIN,
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IN_TAG_CLINE,
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IN_TAG_END,
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IN_TAG_ENDFOOT,
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IN_TAG_ENDHEAD,
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IN_TAG_HLINE,
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IN_TAG_HSPACE,
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IN_TAG_MULTICOLUMN,
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IN_TAG_MULTIROW,
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IN_TAG_TABULARNEWLINE,
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IN_TAG_SLASH,
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IN_FORMULA, // in $...$
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IN_LONGTABLE, // in longtable
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} where_stack[MAX_TEX_STACK_LEVEL] = {IN_UNDEF};
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size_t tex_level = 0;
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for (i = 0; i < len; i++) {
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/* stack checking */
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if (tex_level + 1 == MAX_TEX_STACK_LEVEL) {
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error->code = TEX_PARSING_ERROR_STACKOVERFLOW;
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error->message = TEX_PARSING_ERROR_STACKOVERFLOW_STR;
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return error->code;
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}
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/* read one character from input stream */
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char c = table_source[i];
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/* looking at where_stack and encountered character */
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switch (where_stack[tex_level]) {
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case IN_UNDEF:
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if (c == '\\') {
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tag = zfree_null(tag);
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where_stack[++tex_level] = IN_TAG;
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} else if (c == '%') {
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where_stack[++tex_level] = IN_COMMENT;
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} else {
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error->code = TEX_PARSING_ERROR_UNDEF;
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error->message = TEX_PARSING_ERROR_UNDEF_STR;
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return error->code;
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}
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break;
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case IN_COMMENT:
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if (c == '\r' || c == '\n') {
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where_stack[tex_level--] = IN_UNDEF;
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}
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break;
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case IN_TAG:
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if (islower(c) || isdigit(c) || (!tag && c == '\\')) { // test for char, digit and newline tag "\\"
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tag = zalloc_append8_str(tag, c);
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} else {
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if (!tag) {
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error->code = TEX_PARSING_ERROR_UNDEF;
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error->message = TEX_PARSING_ERROR_UNDEF_STR;
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return error->code;
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} else if (!strcmp(tag, TEX_TAG_BEGIN)) {
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where_stack[tex_level] = IN_TAG_BEGIN;
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} else if (!strcmp(tag, TEX_TAG_CLINE)) {
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where_stack[tex_level] = IN_TAG_CLINE;
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} else if (!strcmp(tag, TEX_TAG_END)) {
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where_stack[tex_level] = IN_TAG_END;
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} else if (!strcmp(tag, TEX_TAG_ENDFOOT)) {
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where_stack[tex_level] = IN_TAG_ENDFOOT;
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} else if (!strcmp(tag, TEX_TAG_ENDHEAD)) {
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where_stack[tex_level] = IN_TAG_ENDHEAD;
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} else if (!strcmp(tag, TEX_TAG_HLINE)) {
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where_stack[tex_level] = IN_TAG_HLINE;
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} else if (!strcmp(tag, TEX_TAG_HSPACE)) {
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where_stack[tex_level] = IN_TAG_HSPACE;
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} else if (!strcmp(tag, TEX_TAG_MULTICOLUMN)) {
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where_stack[tex_level] = IN_TAG_MULTICOLUMN;
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} else if (!strcmp(tag, TEX_TAG_MULTIROW)) {
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where_stack[tex_level] = IN_TAG_MULTIROW;
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} else if (!strcmp(tag, TEX_TAG_TABULARNEWLINE)) {
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where_stack[tex_level] = IN_TAG_TABULARNEWLINE;
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} else if (!strcmp(tag, TEX_TAG_SLASH)) {
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where_stack[tex_level] = IN_TAG_SLASH;
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}
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}
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break;
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case IN_TAGPARM:
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if (c == '{') { // tag params
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where_stack[++tex_level] = IN_TAGPARM;
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} else if (c == '}') { // end tag params
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where_stack[tex_level--] = IN_UNDEF;
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} else if (c == '\\') { // new tag
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where_stack[++tex_level] = IN_TAG;
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} else if (isprint(c)) {
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//~ brpar = zalloc_append8_str(brpar, c); // ???????
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} else {
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error->code = TEX_PARSING_ERROR_UNDEF;
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error->message = TEX_PARSING_ERROR_UNDEF_STR;
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return error->code;
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}
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break;
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case IN_TAG_BEGIN:
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if (c == '{') { // tag params
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where_stack[++tex_level] = IN_TAGPARM;
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} else if (c == '\\') { // new tag
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where_stack[tex_level] = IN_TAG;
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if (FALSE) { // longtable
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}
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} else if (isspace(c)) {
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} else {
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error->code = TEX_PARSING_ERROR_UNDEF;
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error->message = TEX_PARSING_ERROR_UNDEF_STR;
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return error->code;
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}
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break;
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case IN_TAG_CLINE:
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break;
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case IN_TAG_END:
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break;
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case IN_TAG_ENDFOOT:
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break;
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case IN_TAG_ENDHEAD:
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break;
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case IN_TAG_HLINE:
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break;
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case IN_TAG_HSPACE:
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break;
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case IN_TAG_MULTICOLUMN:
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break;
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case IN_TAG_MULTIROW:
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break;
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case IN_TAG_TABULARNEWLINE:
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break;
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case IN_TAG_SLASH:
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break;
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case IN_FORMULA:
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break;
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case IN_LONGTABLE:
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break;
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default:
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error->code = TEX_PARSING_ERROR_UNDEF;
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error->message = TEX_PARSING_ERROR_UNDEF_STR;
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return error->code;
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break;
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}
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}
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table->id = "Drossel1.Table1";
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error->message = NULL;
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return 0;
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}
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