| 1 | /* |
| 2 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: LGPL-2.1-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include "context.hpp" |
| 9 | |
| 10 | #include <common/error.hpp> |
| 11 | #include <common/macros.hpp> |
| 12 | |
| 13 | #include <stddef.h> |
| 14 | #include <string.h> |
| 15 | |
| 16 | int parse_application_context(const char *str, char **out_provider_name, char **out_ctx_name) |
| 17 | { |
| 18 | const char app_ctx_prefix[] = "$app."; |
| 19 | char *provider_name = nullptr, *ctx_name = nullptr; |
| 20 | size_t i, len, colon_pos = 0, provider_name_len, ctx_name_len; |
| 21 | |
| 22 | if (!str || !out_provider_name || !out_ctx_name) { |
| 23 | goto not_found; |
| 24 | } |
| 25 | |
| 26 | len = strlen(str); |
| 27 | if (len <= sizeof(app_ctx_prefix) - 1) { |
| 28 | goto not_found; |
| 29 | } |
| 30 | |
| 31 | /* String starts with $app. */ |
| 32 | if (strncmp(str, app_ctx_prefix, sizeof(app_ctx_prefix) - 1) != 0) { |
| 33 | goto not_found; |
| 34 | } |
| 35 | |
| 36 | /* Validate that the ':' separator is present. */ |
| 37 | for (i = sizeof(app_ctx_prefix); i < len; i++) { |
| 38 | const char c = str[i]; |
| 39 | |
| 40 | if (c == ':') { |
| 41 | colon_pos = i; |
| 42 | break; |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | /* |
| 47 | * No colon found or no ctx name ("$app.provider:") or no provider name |
| 48 | * given ("$app.:..."), which is invalid. |
| 49 | */ |
| 50 | if (!colon_pos || colon_pos == len || colon_pos == sizeof(app_ctx_prefix)) { |
| 51 | goto not_found; |
| 52 | } |
| 53 | |
| 54 | provider_name_len = colon_pos - sizeof(app_ctx_prefix) + 2; |
| 55 | provider_name = calloc<char>(provider_name_len); |
| 56 | if (!provider_name) { |
| 57 | PERROR("malloc provider_name"); |
| 58 | goto not_found; |
| 59 | } |
| 60 | strncpy(provider_name, str + sizeof(app_ctx_prefix) - 1, provider_name_len - 1); |
| 61 | |
| 62 | ctx_name_len = len - colon_pos; |
| 63 | ctx_name = calloc<char>(ctx_name_len); |
| 64 | if (!ctx_name) { |
| 65 | PERROR("malloc ctx_name"); |
| 66 | goto not_found; |
| 67 | } |
| 68 | strncpy(ctx_name, str + colon_pos + 1, ctx_name_len - 1); |
| 69 | |
| 70 | *out_provider_name = provider_name; |
| 71 | *out_ctx_name = ctx_name; |
| 72 | return 0; |
| 73 | not_found: |
| 74 | free(provider_name); |
| 75 | free(ctx_name); |
| 76 | return -1; |
| 77 | } |