mhu/shellmatta
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changed heredoc support

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now the input string is kept intact until the end of the input is reached
this enables the history buffer to store the complete command
Still broken:
history buffer with heredoc wont execute because the delimiter is not determined correctly
editing of multiline things
This commit is contained in:
prozessorkern
2019-07-30 23:55:12 +02:00
parent 280e512746
commit 16365f341e
3 changed files with 66 additions and 36 deletions
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3
api/shellmatta.h
View File

@@ -102,7 +102,8 @@ typedef struct
uint32_t tabCounter; /**< counts the tabulator key presses */
uint32_t escapeCounter; /**< counts the characters of an escape seq */
char escapeChars[4u]; /**< buffer to save the escape characters */
char hereDelimiter[16u]; /**< heredoc delimiter */
uint32_t hereStartIdx; /**< heredoc start of "<<" */
uint32_t hereDelimiterIdx; /**< heredoc delimiter index in input */
uint32_t hereLength; /**< length of the heredoc delimiter */
bool echoEnabled; /**< if true the input is printed */
bool dirty; /**< dirty flag to show changes */

4
example/main.c
View File

@@ -42,7 +42,7 @@ void set_blocking (int fd, int should_block)
static shellmatta_retCode_t doSomething(shellmatta_handle_t handle, const char *arguments, uint32_t length)
{
shellmatta_printf(handle, "%s - length: %u", arguments, length);
return SHELLMATTA_OK;
}
shellmatta_cmd_t doSomethingCmd = {"doSomething", "do", "Function does something", "use me, please", doSomething, NULL};
@@ -79,7 +79,7 @@ int main(void)
static char historyBuffer[4096];
static shellmatta_instance_t instance;
f = open("/dev/pts/1", O_RDWR | O_SYNC);
f = open("/dev/pts/3", O_RDWR | O_SYNC);
if (f < 0)
{

95
src/shellmatta.c
View File

@@ -88,6 +88,8 @@ shellmatta_retCode_t shellmatta_doInit(
inst->dirty = false;
inst->tabCounter = 0u;
inst->escapeCounter = 0u;
inst->hereStartIdx = 0u;
inst->hereDelimiterIdx = 0u;
inst->hereLength = 0u;
inst->mode = SHELLMATTA_MODE_INSERT;
inst->cmdList = &helpCmd;
@@ -197,6 +199,11 @@ shellmatta_retCode_t shellmatta_processData(shellmatta_handle_t handle,
uint8_t cmdExecuted = 0u;
uint32_t cmdLen;
char *tempString;
char *argumentString;
uint32_t argumentLength;
uint32_t byteCounter;
uint32_t idx;
shellmatta_retCode_t ret = SHELLMATTA_OK;
shellmatta_instance_t *inst = (shellmatta_instance_t*)handle;
@@ -205,7 +212,7 @@ shellmatta_retCode_t shellmatta_processData(shellmatta_handle_t handle,
&& (SHELLMATTA_MAGIC == inst->magic))
{
/** -# process byte wise */
for (uint32_t i = 0u; i < size; i++)
for (byteCounter = 0u; byteCounter < size; byteCounter++)
{
/** -# handle escape sequences */
if(inst->escapeCounter != 0u)
@@ -239,31 +246,41 @@ shellmatta_retCode_t shellmatta_processData(shellmatta_handle_t handle,
/*' -# check if length of heredoc delimiter is valid */
if(inst->inputCount > ((uint32_t)(tempString - inst->buffer) + 2u))
{
inst->hereLength = inst->inputCount - ((uint32_t)(tempString - inst->buffer) + 2u);
if(sizeof(inst->hereDelimiter) < inst->hereLength)
inst->hereStartIdx = (uint32_t)(tempString - inst->buffer);
inst->hereDelimiterIdx = inst->hereStartIdx + 2u;
while((inst->hereDelimiterIdx < inst->inputCount)
&& ( ('\0' == inst->buffer[inst->hereDelimiterIdx])
|| (' ' == inst->buffer[inst->hereDelimiterIdx])))
{
inst->write("\r\nHeredoc delimiter too long\r\n", 30u);
inst->inputCount = 0u;
inst->hereLength = 0u;
inst->hereDelimiterIdx ++;
}
else
{
/** -# store delimiter and remove it from the input buffer */
strncpy(inst->hereDelimiter, &(tempString[2u]), inst->hereLength);
inst->inputCount -= (inst->hereLength + 2u);
inst->cursor = inst->inputCount;
inst->dirty = true;
utils_insertChars(inst, data, 1);
inst->lastNewlineIdx = inst->inputCount;
}
inst->hereLength = inst->inputCount - inst->hereDelimiterIdx;
inst->dirty = true;
utils_insertChars(inst, data, 1);
inst->lastNewlineIdx = inst->inputCount;
}
else
{
inst->hereLength = 0u;
/** -# store the current command and reset the history buffer */
inst->dirty = true;
history_storeCmd(inst);
history_reset(inst);
}
}
else
{
argumentString = inst->buffer;
argumentLength = inst->inputCount;
/** -# store the current command and reset the history buffer */
inst->dirty = true;
history_storeCmd(inst);
history_reset(inst);
}
}
else
{
@@ -278,11 +295,27 @@ shellmatta_retCode_t shellmatta_processData(shellmatta_handle_t handle,
}
if( (inst->hereLength == cmdLen)
&& (0 == strncmp( inst->hereDelimiter,
&& (0 == strncmp( &inst->buffer[inst->hereDelimiterIdx],
tempString,
inst->hereLength)))
{
inst->inputCount = inst->lastNewlineIdx;
argumentLength = inst->lastNewlineIdx;
/** -# store the current command and reset the history buffer */
inst->dirty = true;
history_storeCmd(inst);
history_reset(inst);
/* TODO it is difficult to store the complete command in the history buffer if it is restructured before...
* So this should be an extra function that can be called after parsing the command and before calling the command funktion */
for(idx = 1u; idx <= inst->hereStartIdx; idx++)
{
inst->buffer[inst->hereDelimiterIdx + inst->hereLength - idx] = inst->buffer[inst->hereStartIdx - idx];
}
argumentString = &(inst->buffer[inst->hereDelimiterIdx + inst->hereLength - inst->hereStartIdx]);
argumentLength = inst->lastNewlineIdx - ((inst->hereDelimiterIdx + inst->hereLength) - inst->hereStartIdx);
inst->hereLength = 0u;
}
else
@@ -295,18 +328,15 @@ shellmatta_retCode_t shellmatta_processData(shellmatta_handle_t handle,
if(0u == inst->hereLength)
{
cmd = inst->cmdList;
inst->buffer[inst->inputCount] = 0u;
/** -# store the current command and reset the history buffer */
inst->dirty = true;
history_storeCmd(inst);
history_reset(inst);
argumentString[argumentLength] = 0u;
/** -# determine the cmd len (chars until first space or \0 is found */
cmdLen = 0u;
while( (cmdLen < inst->inputCount)
&& (' ' != inst->buffer[cmdLen])
&& ('\0' != inst->buffer[cmdLen]))
while( (cmdLen < argumentLength)
&& (' ' != argumentString[cmdLen])
&& ('\r' != argumentString[cmdLen])
&& ('\n' != argumentString[cmdLen])
&& ('\0' != argumentString[cmdLen]))
{
cmdLen ++;
}
@@ -315,11 +345,11 @@ shellmatta_retCode_t shellmatta_processData(shellmatta_handle_t handle,
while (NULL != cmd)
{
/** -# compare command string and length */
if ( ((0 == strncmp( inst->buffer,
if ( ((0 == strncmp( argumentString,
cmd->cmd,
cmdLen))
&& (cmdLen == strlen(cmd->cmd)))
|| ((0 == strncmp( inst->buffer,
|| ((0 == strncmp( argumentString,
cmd->cmdAlias,
cmdLen))
&& (cmdLen == strlen(cmd->cmdAlias))))
@@ -327,7 +357,7 @@ shellmatta_retCode_t shellmatta_processData(shellmatta_handle_t handle,
inst->write("\r\n", 2u);
cmdExecuted = 1u;
cmd->cmdFct(inst, inst->buffer, inst->inputCount);
cmd->cmdFct(inst, argumentString, argumentLength);
cmd = NULL;
}
else
@@ -338,9 +368,8 @@ shellmatta_retCode_t shellmatta_processData(shellmatta_handle_t handle,
if ((cmdExecuted == 0u) && (inst->inputCount > 0))
{
inst->buffer[inst->inputCount] = '\0';
inst->write("\r\nCommand: ", 11u);
inst->write(inst->buffer, inst->inputCount);
inst->write(argumentString, argumentLength);
inst->write(" not found", 10u);
}
utils_terminateInput(inst);