Andrew Boyson / log

Log

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log.cpp@2:ee4ec2d72525, 2017-02-04 (annotated)

Committer:
andrewboyson
Date:
Sat Feb 04 18:45:41 2017 +0000
Revision:
2:ee4ec2d72525
Parent:
1:4d81afe3859e
Child:
3:7806ff3f1a2d
Display non-ascii characters as hex

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 0:9907e344c82a 1 #include "mbed.h"
andrewboyson 1:4d81afe3859e 2 #include "time.h"
andrewboyson 0:9907e344c82a 3 #define LOG_FILE "/local/log.txt"
andrewboyson 0:9907e344c82a 4
andrewboyson 0:9907e344c82a 5 LocalFileSystem local("local");
andrewboyson 0:9907e344c82a 6
andrewboyson 0:9907e344c82a 7 #define BUFFER_LENGTH 4096
andrewboyson 0:9907e344c82a 8 static char buffer[BUFFER_LENGTH];
andrewboyson 0:9907e344c82a 9 static char* pPush; //Initialised in init
andrewboyson 0:9907e344c82a 10 static char* pPull; //Initialised in init
andrewboyson 0:9907e344c82a 11 static int enable = true;
andrewboyson 0:9907e344c82a 12 static char* incrementPushPullPointer(char* p, char* buffer, int bufferLength)
andrewboyson 0:9907e344c82a 13 {
andrewboyson 0:9907e344c82a 14 p++; //increment the pointer by one
andrewboyson 0:9907e344c82a 15 if (p == buffer + bufferLength) p = buffer; //if the pointer is now beyond the end then point it back to the start
andrewboyson 0:9907e344c82a 16 return p;
andrewboyson 0:9907e344c82a 17 }
andrewboyson 0:9907e344c82a 18 void LogPush(char c)
andrewboyson 0:9907e344c82a 19 {
andrewboyson 0:9907e344c82a 20 //Only add if allowed
andrewboyson 0:9907e344c82a 21 if (!enable) return;
andrewboyson 0:9907e344c82a 22
andrewboyson 2:ee4ec2d72525 23 char* pNext;
andrewboyson 2:ee4ec2d72525 24
andrewboyson 2:ee4ec2d72525 25 //Work out what has to be sent
andrewboyson 2:ee4ec2d72525 26 bool delimited = false;
andrewboyson 2:ee4ec2d72525 27 if (c < ' ' && c != '\r' && c != '\n') delimited = true;
andrewboyson 2:ee4ec2d72525 28 if (c > 126) delimited = true;
andrewboyson 2:ee4ec2d72525 29
andrewboyson 0:9907e344c82a 30 //Move the pull position if about to run into it
andrewboyson 2:ee4ec2d72525 31 pNext = incrementPushPullPointer(pPush, buffer, BUFFER_LENGTH);
andrewboyson 2:ee4ec2d72525 32 if (pNext == pPull) pPull = incrementPushPullPointer(pPull, buffer, BUFFER_LENGTH);
andrewboyson 2:ee4ec2d72525 33
andrewboyson 2:ee4ec2d72525 34 //Add the character at the push position
andrewboyson 2:ee4ec2d72525 35 if (delimited) *pPush = '^';
andrewboyson 2:ee4ec2d72525 36 else *pPush = c;
andrewboyson 2:ee4ec2d72525 37 pPush = incrementPushPullPointer(pPush, buffer, BUFFER_LENGTH);
andrewboyson 2:ee4ec2d72525 38
andrewboyson 2:ee4ec2d72525 39 if (!delimited) return;
andrewboyson 2:ee4ec2d72525 40
andrewboyson 2:ee4ec2d72525 41 //Move the pull position if about to run into it
andrewboyson 2:ee4ec2d72525 42 pNext = incrementPushPullPointer(pPush, buffer, BUFFER_LENGTH);
andrewboyson 0:9907e344c82a 43 if (pNext == pPull) pPull = incrementPushPullPointer(pPull, buffer, BUFFER_LENGTH);
andrewboyson 0:9907e344c82a 44
andrewboyson 0:9907e344c82a 45 //Add the character at the push position
andrewboyson 2:ee4ec2d72525 46 char h = c >> 4;
andrewboyson 2:ee4ec2d72525 47 if (h < 10) h += '0';
andrewboyson 2:ee4ec2d72525 48 else h += 'A' - 10;
andrewboyson 2:ee4ec2d72525 49 *pPush = h;
andrewboyson 0:9907e344c82a 50 pPush = incrementPushPullPointer(pPush, buffer, BUFFER_LENGTH);
andrewboyson 2:ee4ec2d72525 51
andrewboyson 2:ee4ec2d72525 52 //Move the pull position if about to run into it
andrewboyson 2:ee4ec2d72525 53 pNext = incrementPushPullPointer(pPush, buffer, BUFFER_LENGTH);
andrewboyson 2:ee4ec2d72525 54 if (pNext == pPull) pPull = incrementPushPullPointer(pPull, buffer, BUFFER_LENGTH);
andrewboyson 2:ee4ec2d72525 55
andrewboyson 2:ee4ec2d72525 56 //Add the character at the push position
andrewboyson 2:ee4ec2d72525 57 h = c & 0x0F;
andrewboyson 2:ee4ec2d72525 58 if (h < 10) h += '0';
andrewboyson 2:ee4ec2d72525 59 else h += 'A' - 10;
andrewboyson 2:ee4ec2d72525 60 *pPush = h;
andrewboyson 2:ee4ec2d72525 61 pPush = incrementPushPullPointer(pPush, buffer, BUFFER_LENGTH);
andrewboyson 2:ee4ec2d72525 62
andrewboyson 0:9907e344c82a 63 }
andrewboyson 0:9907e344c82a 64 static char *pEnumerate;
andrewboyson 0:9907e344c82a 65 void LogEnumerateStart()
andrewboyson 0:9907e344c82a 66 {
andrewboyson 0:9907e344c82a 67 pEnumerate = pPull;
andrewboyson 0:9907e344c82a 68 }
andrewboyson 0:9907e344c82a 69 int LogEnumerate()
andrewboyson 0:9907e344c82a 70 {
andrewboyson 0:9907e344c82a 71 if (pEnumerate == pPush) return EOF;
andrewboyson 0:9907e344c82a 72 char c = *pEnumerate;
andrewboyson 0:9907e344c82a 73 pEnumerate = incrementPushPullPointer(pEnumerate, buffer, BUFFER_LENGTH);
andrewboyson 2:ee4ec2d72525 74 return c;
andrewboyson 0:9907e344c82a 75 }
andrewboyson 0:9907e344c82a 76 void LogEnable(int on)
andrewboyson 0:9907e344c82a 77 {
andrewboyson 0:9907e344c82a 78 enable = on;
andrewboyson 0:9907e344c82a 79 }
andrewboyson 0:9907e344c82a 80 int LogInit()
andrewboyson 0:9907e344c82a 81 {
andrewboyson 0:9907e344c82a 82 pPush = buffer;
andrewboyson 0:9907e344c82a 83 pPull = buffer;
andrewboyson 0:9907e344c82a 84 return 0;
andrewboyson 0:9907e344c82a 85 }
andrewboyson 0:9907e344c82a 86 void LogV(char *fmt, va_list argptr)
andrewboyson 0:9907e344c82a 87 {
andrewboyson 0:9907e344c82a 88 int size = vsnprintf(NULL, 0, fmt, argptr); //Find the size required
andrewboyson 0:9907e344c82a 89 char snd[size + 1]; //Allocate enough memory for the size required with an extra byte for the terminating null
andrewboyson 0:9907e344c82a 90 vsprintf(snd, fmt, argptr); //Fill the new buffer
andrewboyson 0:9907e344c82a 91 for (char* ptr = snd; *ptr; ptr++) LogPush(*ptr); //Send the string to the log buffer
andrewboyson 0:9907e344c82a 92 }
andrewboyson 0:9907e344c82a 93 void LogF(char *fmt, ...)
andrewboyson 0:9907e344c82a 94 {
andrewboyson 0:9907e344c82a 95 va_list argptr;
andrewboyson 0:9907e344c82a 96 va_start(argptr, fmt);
andrewboyson 0:9907e344c82a 97 LogV(fmt, argptr);
andrewboyson 0:9907e344c82a 98 va_end(argptr);
andrewboyson 0:9907e344c82a 99 }
andrewboyson 0:9907e344c82a 100 void LogCrLf (char * text)
andrewboyson 0:9907e344c82a 101 {
andrewboyson 0:9907e344c82a 102 LogF("%s\r\n", text);
andrewboyson 0:9907e344c82a 103 }
andrewboyson 0:9907e344c82a 104 static void pushuint4(int value)
andrewboyson 0:9907e344c82a 105 {
andrewboyson 0:9907e344c82a 106 if (value > 9999) { LogPush('+'); LogPush('+'); LogPush('+'); LogPush('+'); }
andrewboyson 0:9907e344c82a 107 else if (value < 0) { LogPush('-'); LogPush('-'); LogPush('-'); LogPush('-'); }
andrewboyson 0:9907e344c82a 108 else
andrewboyson 0:9907e344c82a 109 {
andrewboyson 0:9907e344c82a 110 div_t divres;
andrewboyson 0:9907e344c82a 111 int k, c, t, u;
andrewboyson 0:9907e344c82a 112 divres = div(value , 10); u = divres.rem;
andrewboyson 0:9907e344c82a 113 divres = div(divres.quot, 10); t = divres.rem;
andrewboyson 0:9907e344c82a 114 divres = div(divres.quot, 10); c = divres.rem;
andrewboyson 0:9907e344c82a 115 k = divres.quot;
andrewboyson 0:9907e344c82a 116 LogPush(k + '0'); LogPush(c + '0'); LogPush(t + '0'); LogPush(u + '0');
andrewboyson 0:9907e344c82a 117 }
andrewboyson 0:9907e344c82a 118 }
andrewboyson 0:9907e344c82a 119 static void pushuint3(int value)
andrewboyson 0:9907e344c82a 120 {
andrewboyson 0:9907e344c82a 121 if (value > 999) { LogPush('+'); LogPush('+'); LogPush('+'); }
andrewboyson 0:9907e344c82a 122 else if (value < 0) { LogPush('-'); LogPush('-'); LogPush('-'); }
andrewboyson 0:9907e344c82a 123 else
andrewboyson 0:9907e344c82a 124 {
andrewboyson 0:9907e344c82a 125 div_t divres;
andrewboyson 0:9907e344c82a 126 int c, t, u;
andrewboyson 0:9907e344c82a 127 divres = div(value , 10); u = divres.rem;
andrewboyson 0:9907e344c82a 128 divres = div(divres.quot, 10); t = divres.rem;
andrewboyson 0:9907e344c82a 129 c = divres.quot;
andrewboyson 0:9907e344c82a 130 LogPush(c + '0'); LogPush(t + '0'); LogPush(u + '0');
andrewboyson 0:9907e344c82a 131 }
andrewboyson 0:9907e344c82a 132 }
andrewboyson 0:9907e344c82a 133 static void pushuint2(int value)
andrewboyson 0:9907e344c82a 134 {
andrewboyson 0:9907e344c82a 135 if (value > 99) { LogPush('+'); LogPush('+'); }
andrewboyson 0:9907e344c82a 136 else if (value < 0) { LogPush('-'); LogPush('-'); }
andrewboyson 0:9907e344c82a 137 else
andrewboyson 0:9907e344c82a 138 {
andrewboyson 0:9907e344c82a 139 div_t divres;
andrewboyson 0:9907e344c82a 140 int t, u;
andrewboyson 0:9907e344c82a 141 divres = div(value , 10); u = divres.rem;
andrewboyson 0:9907e344c82a 142 t = divres.quot;
andrewboyson 0:9907e344c82a 143 LogPush(t + '0'); LogPush(u + '0');
andrewboyson 0:9907e344c82a 144 }
andrewboyson 0:9907e344c82a 145 }
andrewboyson 0:9907e344c82a 146 void LogTime()
andrewboyson 0:9907e344c82a 147 {
andrewboyson 0:9907e344c82a 148 struct tm tm;
andrewboyson 1:4d81afe3859e 149 TimeToTmUtc(time(NULL), &tm);
andrewboyson 0:9907e344c82a 150
andrewboyson 0:9907e344c82a 151 pushuint4(tm.tm_year + 1900);
andrewboyson 0:9907e344c82a 152 LogPush('-');
andrewboyson 0:9907e344c82a 153 pushuint3(tm.tm_yday + 1);
andrewboyson 0:9907e344c82a 154 LogPush(' ');
andrewboyson 0:9907e344c82a 155 pushuint2(tm.tm_hour);
andrewboyson 0:9907e344c82a 156 LogPush(':');
andrewboyson 0:9907e344c82a 157 pushuint2(tm.tm_min);
andrewboyson 0:9907e344c82a 158 LogPush(':');
andrewboyson 0:9907e344c82a 159 pushuint2(tm.tm_sec);
andrewboyson 0:9907e344c82a 160 }
andrewboyson 0:9907e344c82a 161 void LogTimeCrLf(char * text)
andrewboyson 0:9907e344c82a 162 {
andrewboyson 0:9907e344c82a 163 LogTime();
andrewboyson 0:9907e344c82a 164 LogF(" %s\r\n", text);
andrewboyson 0:9907e344c82a 165 }
andrewboyson 0:9907e344c82a 166 void LogTimeF(char *fmt, ...)
andrewboyson 0:9907e344c82a 167 {
andrewboyson 0:9907e344c82a 168 va_list argptr;
andrewboyson 0:9907e344c82a 169 va_start(argptr, fmt);
andrewboyson 0:9907e344c82a 170 LogTime();
andrewboyson 0:9907e344c82a 171 LogPush(' ');
andrewboyson 0:9907e344c82a 172 LogV(fmt, argptr);
andrewboyson 0:9907e344c82a 173 va_end(argptr);
andrewboyson 0:9907e344c82a 174 }
andrewboyson 0:9907e344c82a 175 void LogSave()
andrewboyson 0:9907e344c82a 176 {
andrewboyson 0:9907e344c82a 177 FILE *fp = fopen(LOG_FILE, "w");
andrewboyson 0:9907e344c82a 178 LogEnumerateStart();
andrewboyson 0:9907e344c82a 179 while(1)
andrewboyson 0:9907e344c82a 180 {
andrewboyson 0:9907e344c82a 181 int c = LogEnumerate();
andrewboyson 0:9907e344c82a 182 if (c == EOF) break;
andrewboyson 0:9907e344c82a 183 putc(c, fp);
andrewboyson 0:9907e344c82a 184 }
andrewboyson 0:9907e344c82a 185 fclose(fp);
andrewboyson 0:9907e344c82a 186 }