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Sub filter: introduced the ngx_http_sub_match() function.

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No functional changes.
This commit is contained in:
Roman Arutyunyan 2016-07-02 15:59:52 +03:00
parent c60b61a290
commit ec70155755
1 changed files with 52 additions and 31 deletions
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83
src/http/modules/ngx_http_sub_filter_module.c
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@ -84,6 +84,8 @@ static ngx_int_t ngx_http_sub_output(ngx_http_request_t *r,
ngx_http_sub_ctx_t *ctx); ngx_http_sub_ctx_t *ctx);
static ngx_int_t ngx_http_sub_parse(ngx_http_request_t *r, static ngx_int_t ngx_http_sub_parse(ngx_http_request_t *r,
ngx_http_sub_ctx_t *ctx); ngx_http_sub_ctx_t *ctx);
static ngx_int_t ngx_http_sub_match(ngx_http_sub_ctx_t *ctx, ngx_int_t start,
ngx_str_t *m);
static char * ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, static char * ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf); void *conf);
@ -592,7 +594,7 @@ ngx_http_sub_output(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx)
static ngx_int_t static ngx_int_t
ngx_http_sub_parse(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) ngx_http_sub_parse(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx)
{ {
u_char *p, *last, *pat, *pat_end, c; u_char *p, c;
ngx_str_t *m; ngx_str_t *m;
ngx_int_t offset, start, next, end, len, rc; ngx_int_t offset, start, next, end, len, rc;
ngx_uint_t shift, i, j; ngx_uint_t shift, i, j;
@ -641,41 +643,15 @@ ngx_http_sub_parse(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx)
m = &match[i].match; m = &match[i].match;
pat = m->data; rc = ngx_http_sub_match(ctx, start, m);
pat_end = m->data + m->len;
if (start >= 0) { if (rc == NGX_DECLINED) {
p = ctx->pos + start; goto next;
} else {
last = ctx->looked.data + ctx->looked.len;
p = last + start;
while (p < last && pat < pat_end) {
if (ngx_tolower(*p) != *pat) {
goto next;
}
p++;
pat++;
}
p = ctx->pos;
}
while (p < ctx->buf->last && pat < pat_end) {
if (ngx_tolower(*p) != *pat) {
goto next;
}
p++;
pat++;
} }
ctx->index = i; ctx->index = i;
if (pat != pat_end) { if (rc == NGX_AGAIN) {
/* partial match */
goto again; goto again;
} }
@ -731,6 +707,51 @@ done:
} }
static ngx_int_t
ngx_http_sub_match(ngx_http_sub_ctx_t *ctx, ngx_int_t start, ngx_str_t *m)
{
u_char *p, *last, *pat, *pat_end;
pat = m->data;
pat_end = m->data + m->len;
if (start >= 0) {
p = ctx->pos + start;
} else {
last = ctx->looked.data + ctx->looked.len;
p = last + start;
while (p < last && pat < pat_end) {
if (ngx_tolower(*p) != *pat) {
return NGX_DECLINED;
}
p++;
pat++;
}
p = ctx->pos;
}
while (p < ctx->buf->last && pat < pat_end) {
if (ngx_tolower(*p) != *pat) {
return NGX_DECLINED;
}
p++;
pat++;
}
if (pat != pat_end) {
/* partial match */
return NGX_AGAIN;
}
return NGX_OK;
}
static char * static char *
ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{ {