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| author | Richard M. Stallman <rms@gnu.org> | 1995-08-22 19:44:26 +0000 |
|---|---|---|
| committer | Richard M. Stallman <rms@gnu.org> | 1995-08-22 19:44:26 +0000 |
| commit | faec11dbd4d6436a20b5f0614b368c2902144d62 (patch) | |
| tree | 451466bd9799d01760a07110b561abb17efec45b /src/regex.c | |
| parent | 4953086242ad1877d757b2131776345cca9359e3 (diff) | |
| download | emacs-faec11dbd4d6436a20b5f0614b368c2902144d62.tar.gz emacs-faec11dbd4d6436a20b5f0614b368c2902144d62.tar.bz2 emacs-faec11dbd4d6436a20b5f0614b368c2902144d62.zip | |
(PUSH_FAILURE_POINT, POP_FAILURE_POINT): Don't push or pop
register values if POSIX backtracking is turned off.
(NUM_FAILURE_ITEMS): Value is 0 if no POSIX backtracking.
Diffstat (limited to 'src/regex.c')
| -rw-r--r-- | src/regex.c | 72 |
1 files changed, 38 insertions, 34 deletions
diff --git a/src/regex.c b/src/regex.c index 9bb15d7366e..d497d895784 100644 --- a/src/regex.c +++ b/src/regex.c @@ -1153,29 +1153,30 @@ typedef struct /* Push the info, starting with the registers. */ \ DEBUG_PRINT1 ("\n"); \ \ - for (this_reg = lowest_active_reg; this_reg <= highest_active_reg; \ - this_reg++) \ - { \ - DEBUG_PRINT2 (" Pushing reg: %d\n", this_reg); \ - DEBUG_STATEMENT (num_regs_pushed++); \ + if (!RE_NO_POSIX_BACKTRACKING & bufp->syntax) \ + for (this_reg = lowest_active_reg; this_reg <= highest_active_reg; \ + this_reg++) \ + { \ + DEBUG_PRINT2 (" Pushing reg: %d\n", this_reg); \ + DEBUG_STATEMENT (num_regs_pushed++); \ \ - DEBUG_PRINT2 (" start: 0x%x\n", regstart[this_reg]); \ - PUSH_FAILURE_POINTER (regstart[this_reg]); \ - \ - DEBUG_PRINT2 (" end: 0x%x\n", regend[this_reg]); \ - PUSH_FAILURE_POINTER (regend[this_reg]); \ + DEBUG_PRINT2 (" start: 0x%x\n", regstart[this_reg]); \ + PUSH_FAILURE_POINTER (regstart[this_reg]); \ \ - DEBUG_PRINT2 (" info: 0x%x\n ", reg_info[this_reg]); \ - DEBUG_PRINT2 (" match_null=%d", \ - REG_MATCH_NULL_STRING_P (reg_info[this_reg])); \ - DEBUG_PRINT2 (" active=%d", IS_ACTIVE (reg_info[this_reg])); \ - DEBUG_PRINT2 (" matched_something=%d", \ - MATCHED_SOMETHING (reg_info[this_reg])); \ - DEBUG_PRINT2 (" ever_matched=%d", \ - EVER_MATCHED_SOMETHING (reg_info[this_reg])); \ - DEBUG_PRINT1 ("\n"); \ - PUSH_FAILURE_ELT (reg_info[this_reg].word); \ - } \ + DEBUG_PRINT2 (" end: 0x%x\n", regend[this_reg]); \ + PUSH_FAILURE_POINTER (regend[this_reg]); \ + \ + DEBUG_PRINT2 (" info: 0x%x\n ", reg_info[this_reg]); \ + DEBUG_PRINT2 (" match_null=%d", \ + REG_MATCH_NULL_STRING_P (reg_info[this_reg])); \ + DEBUG_PRINT2 (" active=%d", IS_ACTIVE (reg_info[this_reg])); \ + DEBUG_PRINT2 (" matched_something=%d", \ + MATCHED_SOMETHING (reg_info[this_reg])); \ + DEBUG_PRINT2 (" ever_matched=%d", \ + EVER_MATCHED_SOMETHING (reg_info[this_reg])); \ + DEBUG_PRINT1 ("\n"); \ + PUSH_FAILURE_ELT (reg_info[this_reg].word); \ + } \ \ DEBUG_PRINT2 (" Pushing low active reg: %d\n", lowest_active_reg);\ PUSH_FAILURE_INT (lowest_active_reg); \ @@ -1212,9 +1213,11 @@ typedef struct #define MAX_FAILURE_ITEMS ((num_regs - 1) * NUM_REG_ITEMS + NUM_NONREG_ITEMS) /* We actually push this many items. */ -#define NUM_FAILURE_ITEMS \ - ((highest_active_reg - lowest_active_reg + 1) * NUM_REG_ITEMS \ - + NUM_NONREG_ITEMS) +#define NUM_FAILURE_ITEMS \ + (((RE_NO_POSIX_BACKTRACKING & bufp->syntax \ + ? 0 : highest_active_reg - lowest_active_reg + 1) \ + * NUM_REG_ITEMS) \ + + NUM_NONREG_ITEMS) /* How many items can still be added to the stack without overflowing it. */ #define REMAINING_AVAIL_SLOTS ((fail_stack).size - (fail_stack).avail) @@ -1272,19 +1275,20 @@ typedef struct low_reg = (unsigned) POP_FAILURE_INT (); \ DEBUG_PRINT2 (" Popping low active reg: %d\n", low_reg); \ \ - for (this_reg = high_reg; this_reg >= low_reg; this_reg--) \ - { \ - DEBUG_PRINT2 (" Popping reg: %d\n", this_reg); \ + if (!RE_NO_POSIX_BACKTRACKING & bufp->syntax) \ + for (this_reg = high_reg; this_reg >= low_reg; this_reg--) \ + { \ + DEBUG_PRINT2 (" Popping reg: %d\n", this_reg); \ \ - reg_info[this_reg].word = POP_FAILURE_ELT (); \ - DEBUG_PRINT2 (" info: 0x%x\n", reg_info[this_reg]); \ + reg_info[this_reg].word = POP_FAILURE_ELT (); \ + DEBUG_PRINT2 (" info: 0x%x\n", reg_info[this_reg]); \ \ - regend[this_reg] = (const char *) POP_FAILURE_POINTER (); \ - DEBUG_PRINT2 (" end: 0x%x\n", regend[this_reg]); \ + regend[this_reg] = (const char *) POP_FAILURE_POINTER (); \ + DEBUG_PRINT2 (" end: 0x%x\n", regend[this_reg]); \ \ - regstart[this_reg] = (const char *) POP_FAILURE_POINTER (); \ - DEBUG_PRINT2 (" start: 0x%x\n", regstart[this_reg]); \ - } \ + regstart[this_reg] = (const char *) POP_FAILURE_POINTER (); \ + DEBUG_PRINT2 (" start: 0x%x\n", regstart[this_reg]); \ + } \ \ set_regs_matched_done = 0; \ DEBUG_STATEMENT (nfailure_points_popped++); \ |