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Diffstat (limited to '')
| -rw-r--r-- | soltools/mkdepend/parse.c | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/soltools/mkdepend/parse.c b/soltools/mkdepend/parse.c new file mode 100644 index 000000000..a25fd9cd2 --- /dev/null +++ b/soltools/mkdepend/parse.c @@ -0,0 +1,402 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* $XConsortium: parse.c,v 1.30 94/04/17 20:10:38 gildea Exp $ */ +/* + +Copyright (c) 1993, 1994 X Consortium + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of the X Consortium shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from the X Consortium. + +*/ + +#include <ctype.h> + +#include "def.h" +static char *hash_lookup( char *symbol, struct symhash *symbols ); +static int gobble( struct filepointer *filep, struct inclist *file, + struct inclist *file_red, struct symhash *symbols ); +static int deftype ( char *line, struct filepointer *filep, struct inclist *file, + int parse_it, struct symhash *symbols); +static int zero_value(char const *exp, struct symhash *symbols); + +extern struct symhash *maininclist; + +int find_includes(struct filepointer *filep, struct inclist *file, struct inclist *file_red, int recursion, boolean failOK, struct IncludesCollection* incCollection, struct symhash *symbols) +{ + char *line; + int type; + + while ((line = get_line(filep))) { + type = deftype(line, filep, file, TRUE, symbols); + switch(type) { + case IF: + doif: + type = find_includes(filep, file, + file_red, recursion+1, failOK, incCollection, symbols); + while ((type == ELIF) || (type == ELIFFALSE) || + (type == ELIFGUESSFALSE)) + type = gobble(filep, file, file_red, symbols); + break; + case IFFALSE: + doiffalse: + type = gobble(filep, file, file_red, symbols); + if (type == ELIF) + goto doif; + else if ((type == ELIFFALSE) || (type == ELIFGUESSFALSE)) + goto doiffalse; + break; + case ELIFFALSE: + case ELIFGUESSFALSE: + case ELIF: + if (!recursion) + gobble(filep, file, file_red, symbols); + if (recursion) + return type; + define(line, &symbols); + break; + case ERROR: + warning("%s: %d: %s\n", file_red->i_file, + filep->f_line, line); + break; + + case -1: + warning("%s", file_red->i_file); + if (file_red != file) + warning1(" (reading %s)", file->i_file); + warning1(", line %d: unknown directive == \"%s\"\n", + filep->f_line, line); + break; + case -2: + warning("%s", file_red->i_file); + if (file_red != file) + warning1(" (reading %s)", file->i_file); + warning1(", line %d: incomplete include == \"%s\"\n", + filep->f_line, line); + break; + } + } + // coverity[leaked_storage] - on purpose + return -1; +} + +int gobble(struct filepointer *filep, + struct inclist *file, + struct inclist *file_red, + struct symhash *symbols) +{ + char *line; + int type; + + while ((line = get_line(filep))) { + type = deftype(line, filep, file, FALSE, symbols); + switch(type) { + case IF: + case IFFALSE: + type = gobble(filep, file, file_red, symbols); + while ((type == ELIF) || (type == ELIFFALSE) || + (type == ELIFGUESSFALSE)) + type = gobble(filep, file, file_red, symbols); + break; + case ERROR: + break; + case ELIF: + case ELIFFALSE: + case ELIFGUESSFALSE: + return type; + case -1: + warning("%s, line %d: unknown directive == \"%s\"\n", + file_red->i_file, filep->f_line, line); + break; + } + } + return -1; +} + +/* + * Decide what type of # directive this line is. + */ +int deftype (char *line, struct filepointer *filep, struct inclist * file, + int parse_it, struct symhash *symbols) +{ + char *p; + char *directive, savechar; + int ret; + (void)file; // used in DEBUG mode + (void)filep; + /* + * Parse the directive... + */ + directive=line+1; + while (*directive == ' ' || *directive == '\t') + directive++; + + p = directive; + while (*p >= 'a' && *p <= 'z') + p++; + savechar = *p; + *p = '\0'; + ret = match(directive, directives); + *p = savechar; + + /* If we don't recognize this compiler directive or we happen to just + * be gobbling up text while waiting for an #endif or #elif or #else + * in the case of an #elif we must check the zero_value and return an + * ELIF or an ELIFFALSE. + */ + + if (ret == ELIF && !parse_it) + { + while (*p == ' ' || *p == '\t') + p++; + /* + * parse an expression. + */ + debug(0,("%s, line %d: #elif %s ", + file->i_file, filep->f_line, p)); + ret = zero_value(p, symbols); + if (ret != IF) + { + debug(0,("false...\n")); + if (ret == IFFALSE) + return ELIFFALSE; + else + return ELIFGUESSFALSE; + } + else + { + debug(0,("true...\n")); + return ELIF; + } + } + + if (ret < 0 || ! parse_it) + return ret; + + /* + * now decide how to parse the directive, and do it. + */ + while (*p == ' ' || *p == '\t') + p++; + switch (ret) { + case IF: + /* + * parse an expression. + */ + ret = zero_value(p, symbols); + debug(0,("%s, line %d: %s #if %s\n", + file->i_file, filep->f_line, ret?"false":"true", p)); + break; + case ELIF: + case ERROR: + debug(0,("%s, line %d: #%s\n", + file->i_file, filep->f_line, directives[ret])); + /* + * nothing to do. + */ + break; + } + return ret; +} + +/* + * HACK! - so that we do not have to introduce 'symbols' in each cppsetup.c + * function... It's safe, functions from cppsetup.c don't return here. + */ +static struct symhash *global_symbols = NULL; + +char * isdefined( char *symbol ) +{ + return hash_lookup( symbol, global_symbols ); +} + +/* + * Return type based on if the #if expression evaluates to 0 + */ +int zero_value(char const *exp, struct symhash *symbols) +{ + global_symbols = symbols; /* HACK! see above */ + if (cppsetup(exp)) + return IFFALSE; + else + return IF; +} + +void define( char *def, struct symhash **symbols ) +{ + char *val; + + /* Separate symbol name and its value */ + val = def; + while (isalnum((unsigned char)*val) || *val == '_') + val++; + if (*val) + *val++ = '\0'; + while (*val == ' ' || *val == '\t') + val++; + + if (!*val) + val = "1"; + hash_define( def, val, symbols ); +} + +static int hash( char *str ) +{ + /* Hash (Kernighan and Ritchie) */ + unsigned int hashval = 0; + + for ( ; *str; str++ ) + { + hashval = ( hashval * SYMHASHSEED ) + ( *str ); + } + + return hashval & ( SYMHASHMEMBERS - 1 ); +} + +struct symhash *hash_copy( struct symhash *symbols ) +{ + int i; + struct symhash *newsym; + if ( !symbols ) + return NULL; + + newsym = (struct symhash *) malloc( sizeof( struct symhash ) ); + + for ( i = 0; i < SYMHASHMEMBERS; ++i ) + { + if ( !symbols->s_pairs[ i ] ) + newsym->s_pairs[ i ] = NULL; + else + { + struct pair *it = symbols->s_pairs[ i ]; + struct pair *nw = newsym->s_pairs[ i ] = (struct pair*) malloc( sizeof( struct pair ) ); + nw->p_name = it->p_name; + nw->p_value = it->p_value; + nw->p_next = NULL; + + while ( it->p_next ) + { + nw->p_next = (struct pair*) malloc( sizeof( struct pair ) ); + it = it->p_next; + nw = nw->p_next; + nw->p_name = it->p_name; + nw->p_value = it->p_value; + nw->p_next = NULL; + } + } + } + return newsym; +} + +void hash_free( struct symhash *symbols ) +{ + int i; + + if ( !symbols ) + return; + + for ( i = 0; i < SYMHASHMEMBERS; ++i ) + { + struct pair *it = symbols->s_pairs[ i ]; + struct pair *next; + while ( it ) + { + next = it->p_next; + free( it ); + it = next; + } + } + free( symbols->s_pairs ); +} + +void hash_define( char *name, char const *val, struct symhash **symbols ) +{ + int hashval; + struct pair *it; + + if ( !symbols ) + return; + + /* Make space if it's needed */ + if ( *symbols == NULL ) + { + int i; + + *symbols = (struct symhash *) malloc( sizeof( struct symhash ) ); + if ( *symbols == NULL ) + fatalerr( "malloc()/realloc() failure in insert_defn()\n" ); + + for ( i = 0; i < SYMHASHMEMBERS; ++i ) + (*symbols)->s_pairs[i] = NULL; + } + + hashval = hash( name ); + it = (*symbols)->s_pairs[ hashval ]; + + /* Replace/insert the symbol */ + if ( it == NULL ) + { + it = (*symbols)->s_pairs[ hashval ] = (struct pair*) malloc( sizeof( struct pair ) ); + it->p_name = copy( name ); + it->p_value = copy( val ); + it->p_next = NULL; + } + else if ( strcmp( it->p_name, name ) == 0 ) + { + it->p_value = copy( val ); + } + else + { + while ( it->p_next && ( strcmp( it->p_next->p_name, name ) != 0 ) ) + { + it = it->p_next; + } + if ( it->p_next ) + it->p_next->p_name = copy( name ); + else + { + it->p_next = (struct pair*) malloc( sizeof( struct pair ) ); + it->p_next->p_name = copy( name ); + it->p_next->p_value = copy( val ); + it->p_next->p_next = NULL; + } + } +} + +char *hash_lookup( char *symbol, struct symhash *symbols ) +{ + struct pair *it; + + if ( !symbols ) + return NULL; + + it = symbols->s_pairs[ hash( symbol ) ]; + + while ( it && ( strcmp( it->p_name, symbol ) != 0 ) ) + { + it = it->p_next; + } + if ( it ) + return it->p_value; + + return NULL; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |