cscg24-guacamole

CSCG 2024 Challenge 'Guacamole Mashup'
git clone https://git.sinitax.com/sinitax/cscg24-guacamole
Log | Files | Refs | sfeed.txt

parse.c (2207B)

      1/*
      2 * Licensed to the Apache Software Foundation (ASF) under one
      3 * or more contributor license agreements.  See the NOTICE file
      4 * distributed with this work for additional information
      5 * regarding copyright ownership.  The ASF licenses this file
      6 * to you under the Apache License, Version 2.0 (the
      7 * "License"); you may not use this file except in compliance
      8 * with the License.  You may obtain a copy of the License at
      9 *
     10 *   http://www.apache.org/licenses/LICENSE-2.0
     11 *
     12 * Unless required by applicable law or agreed to in writing,
     13 * software distributed under the License is distributed on an
     14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     15 * KIND, either express or implied.  See the License for the
     16 * specific language governing permissions and limitations
     17 * under the License.
     18 */
     19
     20#include "config.h"
     21
     22#include <guacamole/timestamp.h>
     23
     24#include <errno.h>
     25#include <limits.h>
     26#include <string.h>
     27#include <stdlib.h>
     28
     29int guacenc_parse_int(char* arg, int* i) {
     30
     31    char* end;
     32
     33    /* Parse string as an integer */
     34    errno = 0;
     35    long int value = strtol(arg, &end, 10);
     36
     37    /* Ignore number if invalid / non-positive */
     38    if (errno != 0 || value <= 0 || value > INT_MAX || *end != '\0')
     39        return 1;
     40
     41    /* Store value */
     42    *i = value;
     43
     44    /* Parsing successful */
     45    return 0;
     46
     47}
     48
     49int guacenc_parse_dimensions(char* arg, int* width, int* height) {
     50
     51    /* Locate the 'x' within the dimensions string */
     52    char* x = strchr(arg, 'x');
     53    if (x == NULL)
     54        return 1;
     55
     56    /* Replace 'x' with a null terminator */
     57    *x = '\0';
     58
     59    /* Parse width and height */
     60    int w, h;
     61    if (guacenc_parse_int(arg, &w) || guacenc_parse_int(x+1, &h))
     62        return 1;
     63
     64    /* Width and height are both valid */
     65    *width = w;
     66    *height = h;
     67
     68    return 0;
     69
     70}
     71
     72guac_timestamp guacenc_parse_timestamp(const char* str) {
     73
     74    int sign = 1;
     75    int64_t num = 0;
     76
     77    for (; *str != '\0'; str++) {
     78
     79        /* Flip sign for each '-' encountered */
     80        if (*str == '-')
     81            sign = -sign;
     82
     83        /* If not '-', assume the character is a digit */
     84        else
     85            num = num * 10 + (*str - '0');
     86
     87    }
     88
     89    return (guac_timestamp) (num * sign);
     90
     91}
     92