mirror of
https://github.com/python/cpython
synced 2026-09-29 12:10:30 +03:00
1.5a3 prerelease 1 from AMK
This commit is contained in:
Guido van Rossum
parent
a74ef66ac8
commit
95e8053a9f
8 changed files with 226 additions and 114 deletions
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@ -132,8 +132,10 @@ regobj_match(re, args)
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re->re_lastok = NULL;
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result = re_match(&re->re_patbuf, buffer, size, offset, &re->re_regs);
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if (result < -1) {
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/* Failure like stack overflow */
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PyErr_SetString(RegexError, "match failure");
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/* Serious failure of some sort; if re_match didn't
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set an exception, raise a generic error */
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if (!PyErr_Occurred())
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PyErr_SetString(RegexError, "match failure");
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return NULL;
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}
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if (result >= 0) {
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@ -174,8 +176,10 @@ regobj_search(re, args)
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result = re_search(&re->re_patbuf, buffer, size, offset, range,
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&re->re_regs);
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if (result < -1) {
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/* Failure like stack overflow */
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PyErr_SetString(RegexError, "match failure");
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/* Serious failure of some sort; if re_match didn't
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set an exception, raise a generic error */
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if (!PyErr_Occurred())
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PyErr_SetString(RegexError, "match failure");
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return NULL;
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}
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if (result >= 0) {
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@ -33,6 +33,7 @@
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#include "myproto.h" /* For PROTO macro --Guido */
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#include <stdio.h>
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#include "Python.h"
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#ifndef NDEBUG
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#define NDEBUG 1
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@ -85,16 +86,16 @@ typedef union item_t
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{
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int num;
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int level;
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char *start;
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char *end;
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unsigned char *start;
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unsigned char *end;
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} reg;
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struct
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{
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int count;
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int level;
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int phantom;
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char *code;
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char *text;
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unsigned char *code;
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unsigned char *text;
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} fail;
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struct
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{
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@ -139,8 +140,8 @@ typedef struct match_state
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* offsets from the beginning of the string before returning the
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* registers to the calling program. */
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char *start[NUM_REGISTERS];
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char *end[NUM_REGISTERS];
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unsigned char *start[NUM_REGISTERS];
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unsigned char *end[NUM_REGISTERS];
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/* Keeps track of whether a register has changed recently. */
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@ -422,7 +423,7 @@ enum regexp_compiled_ops /* opcodes for compiled regexp */
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Cwordbound, /* match if at word boundary */
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Cnotwordbound, /* match if not at word boundary */
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Csyntaxspec, /* matches syntax code (1 byte follows) */
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Cnotsyntaxspec, /* matches if syntax code does not match (1 byte foll)*/
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Cnotsyntaxspec, /* matches if syntax code does not match (1 byte follows) */
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Crepeat1
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};
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@ -469,7 +470,7 @@ static int regexp_ansi_sequences;
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#define SYNTAX(ch) re_syntax_table[(unsigned char)(ch)]
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char re_syntax_table[256];
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unsigned char re_syntax_table[256];
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void re_compile_initialize(void)
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{
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@ -593,11 +594,11 @@ static int hex_char_to_decimal(int ch)
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return 16;
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}
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static void re_compile_fastmap_aux(char *code,
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static void re_compile_fastmap_aux(unsigned char *code,
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int pos,
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char *visited,
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char *can_be_null,
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char *fastmap)
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unsigned char *visited,
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unsigned char *can_be_null,
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unsigned char *fastmap)
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{
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int a;
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int b;
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@ -717,19 +718,20 @@ static void re_compile_fastmap_aux(char *code,
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}
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default:
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{
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abort(); /* probably some opcode is missing from this switch */
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PyErr_SetString(PyExc_SystemError, "Unknown regex opcode: memory corrupted?");
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return;
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/*NOTREACHED*/
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}
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}
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}
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static int re_do_compile_fastmap(char *buffer,
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static int re_do_compile_fastmap(unsigned char *buffer,
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int used,
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int pos,
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char *can_be_null,
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char *fastmap)
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unsigned char *can_be_null,
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unsigned char *fastmap)
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{
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char small_visited[512], *visited;
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unsigned char small_visited[512], *visited;
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if (used <= sizeof(small_visited))
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visited = small_visited;
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@ -759,6 +761,7 @@ void re_compile_fastmap(regexp_t bufp)
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&bufp->can_be_null,
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bufp->fastmap))
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return;
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if (PyErr_Occurred()) return;
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if (bufp->buffer[0] == Cbol)
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bufp->anchor = 1; /* begline */
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else
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@ -792,22 +795,29 @@ void re_compile_fastmap(regexp_t bufp)
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*
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*/
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static int re_optimize_star_jump(regexp_t bufp, char *code)
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static int re_optimize_star_jump(regexp_t bufp, unsigned char *code)
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{
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char map[256];
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char can_be_null;
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char *p1;
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char *p2;
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char ch;
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unsigned char map[256];
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unsigned char can_be_null;
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unsigned char *p1;
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unsigned char *p2;
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unsigned char ch;
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int a;
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int b;
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int num_instructions = 0;
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a = (unsigned char)*code++;
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a |= (unsigned char)*code++ << 8;
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a = (int)SHORT(a);
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p1 = code + a + 3; /* skip the failure_jump */
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/* Check that the jump is within the pattern */
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if (p1<bufp->buffer || bufp->buffer+bufp->used<p1)
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{
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PyErr_SetString(PyExc_SystemError, "Regex VM jump out of bounds (failure_jump opt)");
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return 0;
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}
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assert(p1[-3] == Cfailure_jump);
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p2 = code;
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/* p1 points inside loop, p2 points to after loop */
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@ -923,7 +933,7 @@ static int re_optimize_star_jump(regexp_t bufp, char *code)
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}
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}
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make_update_jump:
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/* make_update_jump: */
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code -= 3;
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a += 3; /* jump to after the Cfailure_jump */
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code[0] = Cupdate_failure_jump;
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@ -948,7 +958,7 @@ static int re_optimize_star_jump(regexp_t bufp, char *code)
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static int re_optimize(regexp_t bufp)
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{
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char *code;
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unsigned char *code;
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code = bufp->buffer;
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@ -1073,7 +1083,7 @@ else \
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#define GETHEX(var) \
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{ \
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char gethex_ch, gethex_value; \
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unsigned char gethex_ch, gethex_value; \
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NEXTCHAR(gethex_ch); \
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gethex_value = hex_char_to_decimal(gethex_ch); \
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if (gethex_value == 16) \
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@ -1147,7 +1157,7 @@ else \
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} \
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}
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char *re_compile_pattern(char *regex, int size, regexp_t bufp)
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unsigned char *re_compile_pattern(unsigned char *regex, int size, regexp_t bufp)
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{
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int a;
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int pos;
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@ -1161,8 +1171,8 @@ char *re_compile_pattern(char *regex, int size, regexp_t bufp)
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int future_jumps[MAX_NESTING];
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int num_jumps;
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unsigned char ch = '\0';
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char *pattern;
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char *translate;
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unsigned char *pattern;
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unsigned char *translate;
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int next_register;
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int paren_depth;
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int num_open_registers;
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@ -1580,23 +1590,23 @@ if (translate) \
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var = translate[var]
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int re_match(regexp_t bufp,
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char *string,
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unsigned char *string,
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int size,
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int pos,
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regexp_registers_t old_regs)
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{
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char *code;
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char *translate;
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char *text;
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char *textstart;
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char *textend;
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unsigned char *code;
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unsigned char *translate;
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unsigned char *text;
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unsigned char *textstart;
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unsigned char *textend;
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int a;
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int b;
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int ch;
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int reg;
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int match_end;
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char *regstart;
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char *regend;
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unsigned char *regstart;
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unsigned char *regend;
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int regsize;
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match_state state;
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@ -1738,18 +1748,36 @@ int re_match(regexp_t bufp,
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a = (unsigned char)*code++;
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a |= (unsigned char)*code++ << 8;
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code += (int)SHORT(a);
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if (code<bufp->buffer || bufp->buffer+bufp->used<code) {
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PyErr_SetString(PyExc_SystemError, "Regex VM jump out of bounds (Cjump)");
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FREE_STATE(state);
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return -2;
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}
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goto continue_matching;
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}
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case Cdummy_failure_jump:
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{
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unsigned char *failuredest;
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a = (unsigned char)*code++;
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a |= (unsigned char)*code++ << 8;
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a = (int)SHORT(a);
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assert(*code == Cfailure_jump);
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b = (unsigned char)code[1];
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b |= (unsigned char)code[2] << 8;
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PUSH_FAILURE(state, code + (int)SHORT(b) + 3, NULL, goto error);
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failuredest = code + (int)SHORT(b) + 3;
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if (failuredest<bufp->buffer || bufp->buffer+bufp->used < failuredest) {
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PyErr_SetString(PyExc_SystemError, "Regex VM jump out of bounds (Cdummy_failure_jump failuredest)");
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FREE_STATE(state);
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return -2;
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}
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PUSH_FAILURE(state, failuredest, NULL, goto error);
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code += a;
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if (code<bufp->buffer || bufp->buffer+bufp->used < code) {
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PyErr_SetString(PyExc_SystemError, "Regex VM jump out of bounds (Cdummy_failure_jump code)");
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FREE_STATE(state);
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return -2;
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}
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goto continue_matching;
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}
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case Cfailure_jump:
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@ -1757,16 +1785,26 @@ int re_match(regexp_t bufp,
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a = (unsigned char)*code++;
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a |= (unsigned char)*code++ << 8;
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a = (int)SHORT(a);
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if (code+a<bufp->buffer || bufp->buffer+bufp->used < code+a) {
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PyErr_SetString(PyExc_SystemError, "Regex VM jump out of bounds (Cfailure_jump)");
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FREE_STATE(state);
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return -2;
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}
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PUSH_FAILURE(state, code + a, text, goto error);
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goto continue_matching;
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}
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case Crepeat1:
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{
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char *pinst;
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unsigned char *pinst;
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a = (unsigned char)*code++;
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a |= (unsigned char)*code++ << 8;
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a = (int)SHORT(a);
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pinst = code + a;
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if (pinst<bufp->buffer || bufp->buffer+bufp->used<pinst) {
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PyErr_SetString(PyExc_SystemError, "Regex VM jump out of bounds (Crepeat1)");
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FREE_STATE(state);
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return -2;
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}
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/* pinst is sole instruction in loop, and it matches a
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* single character. Since Crepeat1 was originally a
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* Cupdate_failure_jump, we also know that backtracking
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@ -1777,8 +1815,8 @@ int re_match(regexp_t bufp,
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switch (*pinst++)
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{
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case Cset:
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{
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if (translate)
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{
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if (translate)
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{
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while (text < textend)
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{
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@ -1801,7 +1839,7 @@ int re_match(regexp_t bufp,
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}
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}
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break;
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}
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}
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case Cexact:
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{
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ch = (unsigned char)*pinst;
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@ -1858,7 +1896,9 @@ int re_match(regexp_t bufp,
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}
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default:
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{
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abort();
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FREE_STATE(state);
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PyErr_SetString(PyExc_SystemError, "Unknown regex opcode: memory corrupted?");
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return -2;
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/*NOTREACHED*/
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}
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}
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@ -1884,7 +1924,7 @@ int re_match(regexp_t bufp,
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{
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if (text == textend)
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goto fail;
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if (!(SYNTAX(*text) & Sword))
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if (!(SYNTAX(*text) & Sword))
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goto fail;
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if (text == textstart)
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goto continue_matching;
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@ -1900,9 +1940,9 @@ int re_match(regexp_t bufp,
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goto fail;
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if (text == textend)
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goto continue_matching;
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if (SYNTAX(*text) & Sword)
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goto fail;
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goto continue_matching;
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if (!(SYNTAX(*text) & Sword))
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goto continue_matching;
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goto fail;
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}
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case Cwordbound:
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{
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@ -1936,15 +1976,19 @@ int re_match(regexp_t bufp,
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{
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NEXTCHAR(ch);
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if (SYNTAX(ch) & (unsigned char)*code++)
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break;
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goto fail;
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goto continue_matching;
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}
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default:
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{
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abort();
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FREE_STATE(state);
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PyErr_SetString(PyExc_SystemError, "Unknown regex opcode: memory corrupted?");
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return -2;
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/*NOTREACHED*/
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}
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}
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#if 0 /* This line is never reached --Guido */
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abort();
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@ -1952,7 +1996,8 @@ int re_match(regexp_t bufp,
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/*
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*NOTREACHED
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*/
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/* Using "break;" in the above switch statement is equivalent to "goto fail;" */
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fail:
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POP_FAILURE(state, code, text, goto done_matching, goto error);
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goto continue_matching;
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@ -1969,33 +2014,37 @@ int re_match(regexp_t bufp,
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FREE_STATE(state);
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return -2;
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}
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#undef PREFETCH
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#undef NEXTCHAR
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int re_search(regexp_t bufp,
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char *string,
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unsigned char *string,
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int size,
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int pos,
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int range,
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regexp_registers_t regs)
|
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{
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char *fastmap;
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char *translate;
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char *text;
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char *partstart;
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char *partend;
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unsigned char *fastmap;
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unsigned char *translate;
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unsigned char *text;
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unsigned char *partstart;
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unsigned char *partend;
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int dir;
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int ret;
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char anchor;
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unsigned char anchor;
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assert(size >= 0 && pos >= 0);
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assert(pos + range >= 0 && pos + range <= size); /* Bugfix by ylo */
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fastmap = bufp->fastmap;
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translate = bufp->translate;
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if (fastmap && !bufp->fastmap_accurate)
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re_compile_fastmap(bufp);
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if (fastmap && !bufp->fastmap_accurate) {
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re_compile_fastmap(bufp);
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if (PyErr_Occurred()) return -2;
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}
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anchor = bufp->anchor;
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if (bufp->can_be_null == 1) /* can_be_null == 2: can match null at eob */
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fastmap = NULL;
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|
|
|
|||
|
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@ -33,16 +33,16 @@ extern "C" {
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|
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typedef struct re_pattern_buffer
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{
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char *buffer; /* compiled pattern */
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unsigned char *buffer; /* compiled pattern */
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int allocated; /* allocated size of compiled pattern */
|
||||
int used; /* actual length of compiled pattern */
|
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char *fastmap; /* fastmap[ch] is true if ch can start pattern */
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char *translate; /* translation to apply during compilation/matching */
|
||||
char fastmap_accurate; /* true if fastmap is valid */
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||||
char can_be_null; /* true if can match empty string */
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||||
char uses_registers; /* registers are used and need to be initialized */
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unsigned char *fastmap; /* fastmap[ch] is true if ch can start pattern */
|
||||
unsigned char *translate; /* translation to apply during compilation/matching */
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||||
unsigned char fastmap_accurate; /* true if fastmap is valid */
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||||
unsigned char can_be_null; /* true if can match empty string */
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unsigned char uses_registers; /* registers are used and need to be initialized */
|
||||
int num_registers; /* number of registers used */
|
||||
char anchor; /* anchor: 0=none 1=begline 2=begbuf */
|
||||
unsigned char anchor; /* anchor: 0=none 1=begline 2=begbuf */
|
||||
} *regexp_t;
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||||
|
||||
typedef struct re_registers
|
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|
|
@ -93,7 +93,7 @@ extern int re_syntax;
|
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/* This is the actual syntax mask. It was added so that Python could do
|
||||
* syntax-dependent munging of patterns before compilation. */
|
||||
|
||||
extern char re_syntax_table[256];
|
||||
extern unsigned char re_syntax_table[256];
|
||||
|
||||
void re_compile_initialize(void);
|
||||
|
||||
|
|
@ -101,7 +101,7 @@ int re_set_syntax(int syntax);
|
|||
/* This sets the syntax to use and returns the previous syntax. The
|
||||
* syntax is specified by a bit mask of the above defined bits. */
|
||||
|
||||
char *re_compile_pattern(char *regex, int regex_size, regexp_t compiled);
|
||||
unsigned char *re_compile_pattern(unsigned char *regex, int regex_size, regexp_t compiled);
|
||||
/* This compiles the regexp (given in regex and length in regex_size).
|
||||
* This returns NULL if the regexp compiled successfully, and an error
|
||||
* message if an error was encountered. The buffer field must be
|
||||
|
|
@ -110,14 +110,14 @@ char *re_compile_pattern(char *regex, int regex_size, regexp_t compiled);
|
|||
* buffer is NULL). Also, the translate field must be set to point to a
|
||||
* valid translation table, or NULL if it is not used. */
|
||||
|
||||
int re_match(regexp_t compiled, char *string, int size, int pos,
|
||||
int re_match(regexp_t compiled, unsigned char *string, int size, int pos,
|
||||
regexp_registers_t old_regs);
|
||||
/* This tries to match the regexp against the string. This returns the
|
||||
* length of the matched portion, or -1 if the pattern could not be
|
||||
* matched and -2 if an error (such as failure stack overflow) is
|
||||
* encountered. */
|
||||
|
||||
int re_search(regexp_t compiled, char *string, int size, int startpos,
|
||||
int re_search(regexp_t compiled, unsigned char *string, int size, int startpos,
|
||||
int range, regexp_registers_t regs);
|
||||
/* This rearches for a substring matching the regexp. This returns the
|
||||
* first index at which a match is found. range specifies at how many
|
||||
|
|
@ -132,28 +132,16 @@ void re_compile_fastmap(regexp_t compiled);
|
|||
* the calling program must have initialized the fastmap field to point
|
||||
* to an array of 256 characters. */
|
||||
|
||||
char *re_comp(char *s);
|
||||
/* BSD 4.2 regex library routine re_comp. This compiles the regexp into
|
||||
* an internal buffer. This returns NULL if the regexp was compiled
|
||||
* successfully, and an error message if there was an error. */
|
||||
|
||||
int re_exec(char *s);
|
||||
/* BSD 4.2 regexp library routine re_exec. This returns true if the
|
||||
* string matches the regular expression (that is, a matching part is
|
||||
* found anywhere in the string). */
|
||||
|
||||
#else /* HAVE_PROTOTYPES */
|
||||
|
||||
extern int re_syntax;
|
||||
extern char re_syntax_table[256];
|
||||
extern unsigned char re_syntax_table[256];
|
||||
void re_compile_initialize();
|
||||
int re_set_syntax();
|
||||
char *re_compile_pattern();
|
||||
unsigned char *re_compile_pattern();
|
||||
int re_match();
|
||||
int re_search();
|
||||
void re_compile_fastmap();
|
||||
char *re_comp();
|
||||
int re_exec();
|
||||
|
||||
#endif /* HAVE_PROTOTYPES */
|
||||
|
||||
|
|
|
|||
|
|
@ -62,7 +62,7 @@ static PyObject *ReopError; /* Exception */
|
|||
#define BEGINNING_OF_BUFFER 7
|
||||
#define END_OF_BUFFER 8
|
||||
|
||||
static char *reop_casefold;
|
||||
static unsigned char *reop_casefold;
|
||||
|
||||
static PyObject *
|
||||
makeresult(regs, num_regs)
|
||||
|
|
@ -105,7 +105,7 @@ reop_match(self, args)
|
|||
PyObject *self;
|
||||
PyObject *args;
|
||||
{
|
||||
char *string;
|
||||
unsigned char *string;
|
||||
int fastmaplen, stringlen;
|
||||
int can_be_null, anchor, i;
|
||||
int flags, pos, result;
|
||||
|
|
@ -163,8 +163,8 @@ reop_match(self, args)
|
|||
|
||||
if (result < -1) {
|
||||
/* Failure like stack overflow */
|
||||
PyErr_SetString(ReopError, "match failure");
|
||||
|
||||
if (!PyErr_Occurred())
|
||||
PyErr_SetString(ReopError, "match failure");
|
||||
return NULL;
|
||||
}
|
||||
if (result == -1) {
|
||||
|
|
@ -174,12 +174,38 @@ reop_match(self, args)
|
|||
return makeresult(&re_regs, bufp.num_registers);
|
||||
}
|
||||
|
||||
#if 0
|
||||
static PyObject *
|
||||
reop_optimize(self, args)
|
||||
PyObject *self;
|
||||
PyObject *args;
|
||||
{
|
||||
unsigned char *buffer;
|
||||
int buflen;
|
||||
struct re_pattern_buffer bufp;
|
||||
|
||||
PyObject *opt_code;
|
||||
|
||||
if (!PyArg_Parse(args, "(s#)", &buffer, &buflen)) return NULL;
|
||||
/* Create a new string for the optimized code */
|
||||
opt_code=PyString_FromStringAndSize(buffer, buflen);
|
||||
if (opt_code!=NULL)
|
||||
{
|
||||
bufp.buffer = PyString_AsString(opt_code);
|
||||
bufp.used=bufp.allocated=buflen;
|
||||
|
||||
}
|
||||
return opt_code;
|
||||
|
||||
}
|
||||
#endif
|
||||
|
||||
static PyObject *
|
||||
reop_search(self, args)
|
||||
PyObject *self;
|
||||
PyObject *args;
|
||||
{
|
||||
char *string;
|
||||
unsigned char *string;
|
||||
int fastmaplen, stringlen;
|
||||
int can_be_null, anchor, i;
|
||||
int flags, pos, result;
|
||||
|
|
@ -237,7 +263,8 @@ reop_search(self, args)
|
|||
|
||||
if (result < -1) {
|
||||
/* Failure like stack overflow */
|
||||
PyErr_SetString(ReopError, "match failure");
|
||||
if (!PyErr_Occurred())
|
||||
PyErr_SetString(ReopError, "match failure");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
|
@ -626,7 +653,7 @@ reop__expand(self, args)
|
|||
{
|
||||
PyObject *results, *match_obj;
|
||||
PyObject *repl_obj, *newstring;
|
||||
char *repl;
|
||||
unsigned char *repl;
|
||||
int size, total_len, i, start, pos;
|
||||
|
||||
if (!PyArg_ParseTuple(args, "OS", &match_obj, &repl_obj))
|
||||
|
|
@ -810,7 +837,7 @@ internal_split(args, retain)
|
|||
reopobject *pattern;
|
||||
int maxsplit=0, count=0, length, next=0, result;
|
||||
int match_end=0; /* match_start is defined below */
|
||||
char *start;
|
||||
unsigned char *start;
|
||||
|
||||
if (!PyArg_ParseTuple(args, "s#Oi", &start, &length, &pattern,
|
||||
&maxsplit))
|
||||
|
|
@ -911,6 +938,7 @@ static struct PyMethodDef reop_global_methods[] = {
|
|||
{"expand_escape", reop_expand_escape, 1},
|
||||
{"_expand", reop__expand, 1},
|
||||
#if 0
|
||||
{"_optimize", reop_optimize, 0},
|
||||
{"split", reop_split, 0},
|
||||
{"splitx", reop_splitx, 0},
|
||||
#endif
|
||||
|
|
@ -922,8 +950,8 @@ initreop()
|
|||
{
|
||||
PyObject *m, *d, *k, *v, *o;
|
||||
int i;
|
||||
char *s;
|
||||
char j[2];
|
||||
unsigned char *s;
|
||||
unsigned char j[2];
|
||||
|
||||
re_compile_initialize();
|
||||
|
||||
|
|
@ -936,7 +964,7 @@ initreop()
|
|||
goto finally;
|
||||
|
||||
/* Initialize reop.casefold constant */
|
||||
if (!(v = PyString_FromStringAndSize((char *)NULL, 256)))
|
||||
if (!(v = PyString_FromStringAndSize((unsigned char *)NULL, 256)))
|
||||
goto finally;
|
||||
|
||||
if (!(s = PyString_AsString(v)))
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue