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author | Mystery Man <unknown@mandriva.org> | 2003-04-17 14:51:14 +0000 |
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committer | Mystery Man <unknown@mandriva.org> | 2003-04-17 14:51:14 +0000 |
commit | ef016519fadd0d52908858470a704cce6a8ceeff (patch) | |
tree | 7dda80ef3508a0b6422cc2ea34ce1d933b81f2a4 /mdk-stage1/slang/slprepr.c | |
parent | 327bd24f8e4291bd1882de1990dd7339f781a9cb (diff) | |
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This commit was manufactured by cvs2svn to create tag 'V1_1_9_55mdk'.V1_1_9_55mdk
Diffstat (limited to 'mdk-stage1/slang/slprepr.c')
-rw-r--r-- | mdk-stage1/slang/slprepr.c | 427 |
1 files changed, 0 insertions, 427 deletions
diff --git a/mdk-stage1/slang/slprepr.c b/mdk-stage1/slang/slprepr.c deleted file mode 100644 index 358eeb874..000000000 --- a/mdk-stage1/slang/slprepr.c +++ /dev/null @@ -1,427 +0,0 @@ -/* Copyright (c) 1996, 1999, 2001 John E. Davis - * This file is part of the S-Lang library. - * - * You may distribute under the terms of either the GNU General Public - * License or the Perl Artistic License. - */ - -/*--------------------------------*-C-*---------------------------------* - * File: slprepr.c - * - * preprocessing routines - */ -/*{{{ notes: */ -/* - * various preprocessing tokens supported - * - * #ifdef TOKEN1 TOKEN2 ... - * - True if any of TOKEN1 TOKEN2 ... are defined - * - * #ifndef TOKEN1 TOKEN2 ... - * - True if none of TOKEN1 TOKEN2 ... are defined - * - * #iftrue - * #ifnfalse - * - always True - * - * #iffalse - * #ifntrue - * - always False - * - * #if$ENV - * - True if the enviroment variable ENV is set - * - * #ifn$ENV - * - True if the enviroment variable ENV is not set - * - * #if$ENV TOKEN1 TOKEN2 ... - * - True if the contents of enviroment variable ENV match - * any of TOKEN1 TOKEN2 ... - * - * #ifn$ENV TOKEN1 TOKEN2 ... - * - True if the contents of enviroment variable ENV do not match - * any of TOKEN1 TOKEN2 ... - * - * NB: For $ENV, the tokens may contain wildcard characters: - * '?' - match any single character - * '*' - match any number of characters - * - * #elif... - * #else - * #endif - * - * - * mj olesen - *----------------------------------------------------------------------*/ -/*}}}*/ -/*{{{ includes: */ -#include "slinclud.h" - -#include "slang.h" -#include "_slang.h" -/*}}}*/ - -int (*SLprep_exists_hook) (char *, char); -int (*_SLprep_eval_hook) (char *); - -/*{{{ SLprep_open_prep (), SLprep_close_prep () */ -int SLprep_open_prep (SLPreprocess_Type *pt) -{ - pt->this_level = 0; - pt->exec_level = 0; - pt->prev_exec_level = 0; - pt->comment_char = '%'; - pt->preprocess_char = '#'; - pt->flags = 0; - return 0; -} - -void SLprep_close_prep (SLPreprocess_Type *pt) -{ - (void) pt; -} -/*}}}*/ - -/*{{{ SLwildcard () */ -/*----------------------------------------------------------------------* - * Does `string' match `pattern' ? - * - * '*' in pattern matches any sub-string (including the null string) - * '?' matches any single char. - * - * Code taken from that donated by Paul Hudson <paulh@harlequin.co.uk> - * to the fvwm project. - * It is public domain, no strings attached. No guarantees either. - *----------------------------------------------------------------------*/ -static int SLwildcard (char *pattern, char *string) -{ - if (pattern == NULL || *pattern == '\0' || !strcmp (pattern, "*")) - return 1; - else if (string == NULL) - return 0; - - while (*pattern && *string) switch (*pattern) - { - case '?': - /* match any single character */ - pattern++; - string++; - break; - - case '*': - /* see if rest of pattern matches any trailing */ - /* substring of the string. */ - if (*++pattern == '\0') - return 1; /* trailing * must match rest */ - - while (*string) - { - if (SLwildcard (pattern, string)) return 1; - string++; - } - return 0; - - /* break; */ - - default: - if (*pattern == '\\') - { - if (*++pattern == '\0') - pattern--; /* don't skip trailing backslash */ - } - if (*pattern++ != *string++) return 0; - break; - } - - return ((*string == '\0') - && ((*pattern == '\0') || !strcmp (pattern, "*"))); -} -/*}}}*/ - -#if defined(__16_BIT_SYSTEM__) -# define MAX_DEFINES 10 -#else -# define MAX_DEFINES 128 -#endif - -/* The extra one is for NULL termination */ -char *_SLdefines [MAX_DEFINES + 1]; - -int SLdefine_for_ifdef (char *s) /*{{{*/ -{ - unsigned int i; - - for (i = 0; i < MAX_DEFINES; i++) - { - char *s1 = _SLdefines [i]; - - if (s1 == s) - return 0; /* already defined (hashed string) */ - - if (s1 != NULL) - continue; - - s = SLang_create_slstring (s); - if (s == NULL) - return -1; - - _SLdefines[i] = s; - return 0; - } - return -1; -} -/*}}}*/ - -/*{{{ static functions */ -static int is_any_defined(char *buf, char comment) /*{{{*/ -{ - char *sys; - unsigned int i; - - while (1) - { - register char ch; - - /* Skip whitespace */ - while (((ch = *buf) == ' ') || (ch == '\t')) - buf++; - - if ((ch == '\n') || (ch == 0) || (ch == comment)) - return 0; - - i = 0; - while (NULL != (sys = _SLdefines [i++])) - { - unsigned int n; - - if (*sys != ch) - continue; - - n = strlen (sys); - if (0 == strncmp (buf, sys, n)) - { - char ch1 = *(buf + n); - - if ((ch1 == '\n') || (ch1 == 0) || - (ch1 == ' ') || (ch1 == '\t') || (ch1 == comment)) - return 1; - } - } - - /* Skip past word */ - while (((ch = *buf) != ' ') - && (ch != '\n') - && (ch != 0) - && (ch != '\t') - && (ch != comment)) - buf++; - } -} -/*}}}*/ - -static unsigned char *tokenize (unsigned char *buf, char *token, unsigned int len) -{ - register char *token_end; - - token_end = token + (len - 1); /* allow room for \0 */ - - while ((token < token_end) && (*buf > ' ')) - *token++ = *buf++; - - if (*buf > ' ') return NULL; /* token too long */ - - *token = '\0'; - - while ((*buf == ' ') || (*buf == '\t')) buf++; - - return buf; -} - -static int is_env_defined (char *buf, char comment) /*{{{*/ -{ - char * env, token [32]; - - if ((*buf <= ' ') || (*buf == comment)) return 0; /* no token */ - - if (NULL == (buf = (char *) tokenize ((unsigned char *) buf, - token, sizeof (token)))) - return 0; - - if (NULL == (env = getenv (token))) - return 0; /* ENV not defined */ - - if ((*buf == '\0') || (*buf == '\n') || (*buf == comment)) - return 1; /* no tokens, but getenv() worked */ - - do - { - buf = (char *) tokenize ((unsigned char *) buf, token, sizeof (token)); - if (buf == NULL) return 0; - - if (SLwildcard (token, env)) - return 1; - } - while (*buf && (*buf != '\n') && (*buf != comment)); - - return 0; -} -/*}}}*/ -/*}}}*/ - -int SLprep_line_ok (char *buf, SLPreprocess_Type *pt) /*{{{*/ -{ - int level, prev_exec_level, exec_level; - - if ((buf == NULL) || (pt == NULL)) return 1; - - if (*buf != pt->preprocess_char) - { - if (pt->this_level != pt->exec_level) - return 0; - - if (*buf == '\n') return pt->flags & SLPREP_BLANK_LINES_OK; - if (*buf == pt->comment_char) return pt->flags & SLPREP_COMMENT_LINES_OK; - - return 1; - } - - level = pt->this_level; - exec_level = pt->exec_level; - prev_exec_level = pt->prev_exec_level; - - buf++; - - /* Allow '#!' to pass. This could be a shell script with something - like '#! /local/bin/slang' */ - if ((*buf == '!') && (pt->preprocess_char == '#')) - return 0; - - /* Allow whitespace as in '# ifdef' */ - while ((*buf == ' ') || (*buf == '\t')) buf++; - if (*buf < 'a') return (level == exec_level); - - if (!strncmp(buf, "endif", 5)) - { - if (level == exec_level) - { - exec_level--; - prev_exec_level = exec_level; - } - level--; - if (level < prev_exec_level) prev_exec_level = level; - goto done; - } - - if ((buf[0] == 'e') && (buf[1] == 'l')) /* else, elifdef, ... */ - { - if ((level == exec_level + 1) - && (prev_exec_level != level)) - { - /* We are in position to execute */ - buf += 2; - if ((buf[0] == 's') && (buf[1] == 'e')) - { - /* "else" */ - exec_level = level; - goto done; - } - - /* drop through to ifdef testing. First set variable - * to values appropriate for ifdef testing. - */ - level--; /* now == to exec level */ - } - else - { - if (level == exec_level) - { - exec_level--; - } - goto done; - } - } - - if ((buf[0] == 'i') && (buf[1] == 'f')) - { - int truth; - - if (level != exec_level) - { - /* Not interested */ - level++; - goto done; - } - - level++; - - buf += 2; - if (buf[0] == 'n') - { - truth = 0; - buf++; - } - else truth = 1; - - if (!strncmp (buf, "def", 3)) - truth = (truth == is_any_defined(buf + 3, pt->comment_char)); - - else if (!strncmp (buf, "false", 5)) - truth = !truth; - - else if (*buf == '$') - truth = (truth == is_env_defined (buf + 1, pt->comment_char)); - - else if (!strncmp (buf, "exists", 6) - && (SLprep_exists_hook != NULL)) - truth = (truth == (*SLprep_exists_hook)(buf + 6, pt->comment_char)); - - else if (!strncmp (buf, "eval", 4) - && (_SLprep_eval_hook != NULL)) - truth = (truth == (*_SLprep_eval_hook) (buf + 4)); - - else if (0 != strncmp (buf, "true", 4)) - return 1; /* let it bomb */ - - if (truth) - { - exec_level = level; - prev_exec_level = exec_level; - } - } - else return 1; /* let it bomb. */ - - done: - - if (exec_level < 0) return 1; - - pt->this_level = level; - pt->exec_level = exec_level; - pt->prev_exec_level = prev_exec_level; - return 0; -} -/*}}}*/ - -/*{{{ main() - for testing only */ -#if 0 -int main () -{ - char buf[1024]; - SLPreprocess_Type pt; - - SLprep_open_prep (&pt); - - SLdefine_for_ifdef ("UNIX"); - - while (NULL != fgets (buf, sizeof (buf) - 1, stdin)) - { - if (SLprep_line_ok (buf, &pt)) - { - fputs (buf, stdout); - } - } - - SLprep_close_prep (&pt); - return 0; -} -#endif -/*}}}*/ |